Sink- followed by a large amount of water Waste Bucket: Hydrochloric acid solution, Sodium hydroxide solution
Laboratory chemical waste can be disposed of in one of three ways: Non-hazardous waste should be disposed of in a sanitary sewer or garbage; sewer disposal should come after acid-base neutralization. Note:To be permitted, any other form of therapy must be incorporated within an experimental process.
There are several categories into which this garbage might be divided: dangerous, medical, biological, electrical, and lab. Reducing laboratory waste will provide a number of advantages, including monetary savings, lower disposal expenses, and increased lab safety.
The environment, the public's health, and the laboratory itself can all be harmed by improper laboratory waste disposal. The Laboratory: If it is discovered that a laboratory is unlawfully disposing of their hazardous waste, the EPA levies severe fines and penalties.
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write the principle involved in the manufacture of steel by open health process
Answer:
Explanation:
In the open hearth process for producing steel in a Siemens-Martin open hearth furnace, so called because the molten metal lies in a comparative shallow pool on the furnace bottom or hearth. The hearth is surrounded by a roof and walls of refractory bricks. The charge is fed through a charging door and heated to 1,600°C to 1,650°C mainly by radiation of heat from the burning of gaseous fuels above it. It is not the amount of heat but rather the high temperature heat that is essential for the purpose.
When montiring stream quality, scientists use macroinvertebrates. What does their presence or absence tell us? Lesson 1.09
Question 20
It is used to indicate clean or polluted water
It is used to indicate the type of rocks found in the area
It is used to indicate how fast the stream is moving
It is used to indicate how blue the water is. Wetlands are an important part to watersheds.
Question 19
True
False Why are rain gardens helpful? Lesson 1.07
Question 18
They help bring rain to places that need water to grow plants
They help deliver fresh water to the grocery store
They are not helpful
They help reduce storm water polution and improve overall water quality Question 12 (1 point)
Saved
This picture shows different amounts of space in between the particles of two different soil samples. Which word best describes what we are seeing?
Question 12
porosity
permeability
precipitation
the water cycle All of these are ways that humans impact the water cycle EXCEPT __________.
Question 5
irrigating crops and lawns
hiking in the woods and boating on lakes
building dams and buildings
cutting down trees and forests Match each word with the correct definiton. Lesson 1.02
Question 6 options:
rain, snow, sleet or hail that falls to the ground
water from plants evaporating
Liquid changes to a gas
cooling of water molecules, gas changes to a liquid
1.
Evaporation
2.
Condensation
3.
Precipitation
4.
Transpiration All of the water we have on Earth is all of the water Earth has EVER had.
Question 7
True
False An increase in demand for water is caused by an increase in __________.
Question 8
pollution
population
climate change
urbanization
1. macroinvertebrates is used to indicate clean or polluted water
2. They help reduce stormwater pollution and improve overall water quality
3. porosity
4. hiking in the woods and boating on lakes
5. Precipitation, Transpiration, Evaporation, Condensation
6. True
7. population
Why does the presence of macroinvertebrates affect water quality?Different types of macroinvertebrates are present in different streams and levels of pollution. Their presence or absence is used to show clean or polluted water.
Planted with grasses and perennials, rain gardens can be a beautiful way to reduce runoff from your area. Rain gardens can also help to filter out pollutants from water in runoff and also provide food and shelter for wildlife.
As our economy grows, so does the demand for domestic water-consuming appliances increases. An increase in population contributes to an increase in water use and increase demand.
So we can conclude that macroinvertebrates are used to indicate clean or polluted water.
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an unknown metal M reacts with sulfur to form a compund M2S3.If 3.12g of M reacts with 2.88g of Sulfur. What is that name of M and M2S3?.
When an unknown metal M reacts with sulfur to form a compund M2S3.If 3.12g of M reacts with 2.88g of Sulfur, the name of M chromium and M2S3 will be chromium(III) sulfide.
How to explain the metalLet M = atomic weight of M
2M + 3S → M2S3
Molar ratio is 2:3
2M g of M + 3* 32.056g of S
2M/(3*32.056) g will react with 1.000 g of S
.: [2M/(3*32.056)]*2.88 g of M will react with 2.88 g of S
Given this equals 3.12 g
.: 3.12 = [2M/(3*32.056)]*2.88 = 0.05990M
M= 52.1 g; using at wt of S = 32.0 gives M = 52.0 so it is chromium At Wt = 51.996
The name is chromium(III) sulfide.
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Ni^2+ (NH3)m BrnpH2O where m, n, and p represent the coefficients in the formula. An analysis of the salt can be obtained if a sample is dissolved by an acid-base reaction in excess acid and then the excess is titrated with NaOH. That is, excess HCI+OH-H20 A 0.185-g sample of the nickel salt was dissolved in 30.00 mL of 0.1013 N HCI. The excess HCl required 6.30 mL of 0.1262 N NaOH to reach the end point. Calculate the weight of the salt that contains one mole of NH3 (that is the equivalent weight of the salt)
Salt equivalent weight = (0.185 g) / (Moles of salt)
The results from the acid-base titration may be used to compute the equivalent weight of the nickel salt.
To begin, determine the number of moles of HCl utilized in the reaction:
HCl moles = 0.1013 N * (0.0630 L) = 0.006426 moles
Next, compute the moles of OH- ions that interacted with the HCl:
OH- moles = 0.006426 moles
We now understand how one mole of OH- interacts with one mole of H+. As a result, the number of moles of H+ in the reaction equals the number of moles of OH-.
Finally, the moles of nickel salt present in the sample may be estimated as follows:
(Moles of H+) / (n + p) = Moles of salt
By dividing the mass of the salt sample by the number of moles of salt, the equivalent weight of the salt (mass of salt containing one mole of NH3) may be calculated:
Salt equivalent weight = (0.185 g) / (Moles of salt)
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Suppose you need 7.5 m of Grade 70 tow chain, which has a diameter of 3/8" and weighs 2.16 kg/m, to tow a car. How would you calculate the mass of this much chain? Set the math up. But don't do any of it. Just leave your answer as a math expression. Also, be sure your answer includes all the correct unit symbols.
The mass of 7m chain is 15.12 kg.
It states that in order to tow a car, 7m of grade 70 tow chain with a 3/8" diameter is needed.
Chain length is therefore 7m.
Given that the chain weighs 2.16 kg per meter,
Thus, the mass of 1 m of chain equals 2.16 kg of chain's weight.
In this case, weight and mass are equivalent because both are measured in kilograms (kg).
Therefore, we must increase the mass of a 1 m chain by the chain's length to obtain the mass of a 7 m chain.
Consequently, the weight of a 7-meter chain = 7 x 2.16 kilograms = 15.12 kilograms.
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You are asked to help design a bimetallic temperature sensor. You are given five metal alloys to work with; their thermal expansion coefficients are listed below. Assuming the elastic properties for each alloy are identical, which combination of alloys would give you the largest temperature-sensitive deflection for your sensor design?
Thermal Expansion Coefficients of Alloys
Alloy 1: 15 m/m-K
Alloy 2: 10 m/m-K
Alloy 3: 10 m/m-K
Alloy 4: 8 m/m-K
Alloy 5: 5 m/m-K
Alloy 1 and Alloy 2
Alloy 1 and Alloy 4
Alloy 1 and Alloy 5
Alloy 2 and Alloy 3
Alloy 4 and Alloy 5
Alloy 1 / Alloy 2 and Alloy 1 / Alloy 3 would give equally large deflections.
Alloy 1 and Alloy 5
The combination of alloys 1 and 5 would give the largest temperature-sensitive deflection for your bimetallic temperature sensor design. Thus, the correct option is C.
A bimetallic temperature sensor works by using two different metals with different thermal expansion coefficients that are bonded together. When the temperature changes, one metal will expand more than the other, causing the bond to bend. To achieve the largest temperature-sensitive deflection, it is important to use two metals with the largest possible difference in thermal expansion coefficients.
In this case, alloys 1 and 5 have the largest difference, with thermal expansion coefficients of 25 m/m-K and 2 m/m-K respectively, resulting in the largest deflection and making it the most suitable combination for a temperature sensor design.
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which of the following describe weathering of the sea floor? (choose all that apply.) multiple select question. both chemical and physical weathering occur. weathering is more rapid along coastlines. weathering occurs more slowly than on land. only physical weathering occurs. only chemical weathering occurs. need help? review these concept resources.
A: "Both chemical and physical weathering occur" and B: "weathering is more rapid along coastlines" describe weathering of the sea floor.
Weathering is the breaking down and alteration of rocks, soils and minerals at or near the Earth's surface, through physical and chemical processes.
Physical weathering involves mechanical processes such as freeze-thaw, abrasion and erosion, which cause rocks and soils to physically break apart into smaller pieces. While chemical weathering involves chemical reactions between the minerals in rocks and soils and the surrounding environment, altering their chemical composition and causing them to break down into new minerals.
In the sea floor, both physical and chemical weathering occur as a result of the exposure to the ocean and its many processes such as wave action, currents and temperature changes. Weathering is more rapid along coastlines due to the increased exposure to these processes and because these areas often experience more severe weather conditions than other parts of the sea floor.
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The Keq for the reaction below is 40 at 550.0 °C. What is the Keq for the reverse reaction?
H2(g) + I2(g) ⇌ 2HI(g)
The Keq for the reverse reaction, H[tex]_2[/tex] (g) + I[tex]_2[/tex](g) ⇌ 2HI(g) is 0.025. If this state is not disturbed by an external force, it will persist unbrokenly.
What is equilibrium?In physics, a system is said to be in equilibrium when neither it internal energy state nor its state of motion tend to vary over time. If a simple mechanical body experiences either accelerometers nor rotational acceleration, it is thought to be in equilibrium. If this state is not disturbed by an external force, it will persist unbrokenly.
H[tex]_2[/tex] (g) + I[tex]_2[/tex](g) ⇌ 2HI(g)
Keq =40
Keq for the reverse reaction
Keq =1/40
=0.025
Therefore, the Keq for the reverse reaction, H[tex]_2[/tex] (g) + I[tex]_2[/tex](g) ⇌ 2HI(g) is 0.025.
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A computer monitor has a width of 14.68
inches and a height of 11.01
inches. What is the area of the monitor display in square meters?
Answer: 161.6268 square inches
Explanation: Area of a rectangle is length (or width) times the height. So, 14.6 * 11.01 is 161.6268 square inches. Area is always in square units.
The half life for a first-order reaction is 148 minutes. What is the rate constant of this reaction if the concentration is 1.10M after 50 minutes has elapsed?
Answer:
The rate constant for the first-order reaction can be calculated by using the equation: k = 0.693 / t1/2. In this case, the half life is 148 minutes, so the rate constant is calculated as 0.0047 per minute. This means that, after 50 minutes have elapsed, the concentration of the reaction should be 1.10M * e^(-0.0047 * 50) = 0.962M.
which of the following compound(s) would you expect to be visible on a tlc plate using uv light? (there may be more than one correct answer)
It is most useful for visualizing aromatic compounds and highly conjugated systems, as these strongly absorb UV.
About Aromatic compoundIn organic chemistry, an aromatic compound is a type of hydrocarbon compound that is cyclic, planar, has electrons in conjugated p orbitals and obeys Hückel's rule. Therefore, these compounds are often also referred to as aromatic hydrocarbons or Arenes (Arene).
Aromatic compounds are included in unsaturated cyclic compounds which have very different chemical properties from conjugated alkenes (polyenes) so that these compounds are classified as a separate class of hydrocarbons from alkenes.
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both gases and liquids are considered to be fluids that have individual molecules that move around with kinetic and potential energy. kinetic energy, defined as the energy related to motion, takes three forms: translational energy that occurs as a molecule moves from position a to position b, rotational energy that occurs as a molecule spins around an imaginary axis at its center of mass, and vibrational energy that occurs as individual atoms in a molecular bond move towards and away from each other. usually, molecules possess varying combinations of kinetic energy forms. in contrast, potential energy is defined as stored energy that could be released to become kinetic energy. the total energy of a molecule is fixed, meaning that a molecule has some combination of kinetic and potential energies. varying amount of kinetic and potential energies define how molecules in a fluid interact with each other. for example, when the kinetic energy of a molecule is high (greater than 1000j), it can no longer interact with neighboring molecules strongly enough to remain a liquid. however, if the potential energies are too high (greater than 1000 j), molecules cannot escape a liquid to become a gas. if the kinetic energy is high and the potential energy is low, molecules tend to become a gas and can be modeled by an equation known as the ideal gas law: pv
The General Gas Equation, sometimes referred to as the Ideal Gas Law, is a mathematical formula that describes how ideal gases behave. PV = nRT
where P is the gas's pressure, V is its volume, n is the number of moles, R is its gas constant, and T is its temperature. According to this equation, the volume and pressure for a given amount of gas at a particular temperature are equal to the number of moles of the gas times the gas constant times the temperature. This equation can be used to forecast how ideal gases will behave in certain circumstances. For instance, it can be used to figure out the volume of a gas at a specific pressure and temperature, the amount of pressure required to compress a specific amount of gas, or the density of a gas at a specific temperature.
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What is the equation for alum and ammonia
Answer:
Chemical formula: (NH4)A(SO4)2
Explanation:
Which of the following seal designs are commonly used to keep oil inside the transmission while keeping water and dirt out? Lip seals.
Lip seal designs are commonly used to keep oil inside the transmission while keeping water and dirt out.
Rubber lip seals have been recognized for decades as the single most significant component in the design of rotary shaft seals.
Radial lip seals see the widespread application in wet environments, including water pumps, ships, and tidal turbines, among other places. The lip seals prevent the entry of water and debris while also retaining any oil or grease lubricant that may be present within the application.
Lip seals are available in a variety of designs, ranging from those with a single lip seal to those with numerous lips on a cartridge. Regardless of the design, they serve the purpose of preventing the entry of water and dirt while also preserving lubricants.
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glitter cost about $9 for a 16 ounce container if an artist wants to fill a 2L bottle with glitter, how much will they need to spend on glitter?
An artist wants to fill a 2L bottle with glitter, $38.03 will they need to spend on glitter
Calculating the problem:First, convert the volume of the 2L bottle to ounces:
2 liters = 2 x 33.814 ounces = 67.6 ounces
So, the artist needs 67.6 / 16 ounces of glitter per container = 4.225 containers
Therefore, 4.225 containers x $9 per container = $38.03 on glitter.
How do glitters work?Plastic or metal glitters are small, shiny particles used for decoration. They are frequently utilized in fashion, cosmetics, and arts and crafts and come in a variety of colors and shapes.
Why is the ounce utilized?In the United States customary units system, the weight or volume of a substance is expressed in ounces (oz). It is frequently utilized to measure the volume of liquids like oil or water as well as the weight of food, beverages, or cooking ingredients.
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Classify the figures shown below as depicting a chemical reaction, a physical change, or neither of these.
Answer:
Explanation:
A) None
B) Chemical
C) Physical
D) Chemical
E) Physical
F) None
G) Chemical
H) None
I) Chemical
Figures can be classified as depicting a chemical reaction, a physical change, or neither of these. A chemical reaction involves the formation of new substances or a change in chemical composition. A physical change involves a change in physical properties without a change in chemical composition.
Explanation:Classification of FiguresThe figures shown below can be classified as depicting a chemical reaction, a physical change, or neither of these:
Chemical Reaction: A figure showing the formation of new substances or a change in chemical composition. Examples include burning of wood, rusting of iron, and digestion of food.Physical Change: A figure showing a change in physical properties without a change in chemical composition. Examples include melting of ice, boiling of water, and tearing of paper.Neither: A figure that does not depict a chemical reaction or a physical change. Examples include figures showing static objects or processes that do not involve a change in properties.Learn more about Classifying Figures here:https://brainly.com/question/32823174
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The energy E of the electron in a hydrogen atom can be calculated from the Bohr formula: R₂ 2 E=-- 71 In this equation R, stands for the Rydberg energy, and stands for the principal quantum number of the orbital that holds the electron. (You can find the value of the Rydberg energy using the Data button on the ALEKS toolbar.) Calculate the wavelength of the line in the emission line spectrum of hydrogen caused by the transition of the electron from an orbital with n = 11 to an orbital with n=7. Round your answer to 3 significant digits.
3. How many ml of volume are in 1.0 cm³?
Answer:
1
Explanation:
just multiply it by 1
4. Use the balanced chemical equation from the last question to solve this situation: You combine 0.5 moles of Na2CO3 with enough CaCl2 that your compound reacts completely. How many moles of NaCl would you expect this reaction to produce? Show all work below.
The balanced chemical equation for the reaction between Na2CO3 (sodium carbonate) and CaCl2 (calcium chloride) is:
Na2CO3 (sodium carbonate) + CaCl2 (calcium chloride) -> 2NaCl (sodium chloride) + CaCO3 (calcium carbonate)
Given that you have 0.5 moles of Na2CO3, you need 0.5 moles of CaCl2 for the reaction to go to completion.
The number of moles of NaCl produced in the reaction can be calculated by multiplying the number of moles of Na2CO3 by the coefficient in front of NaCl in the balanced equation:
2NaCl/1Na2CO3 * 0.5 moles Na2CO3 = 1 mole NaCl
Therefore, the reaction between 0.5 moles of Na2CO3 and enough CaCl2 to react completely would produce 1 mole of NaCl.
Answer the following questions using principles of chemical bonding and molecular structure. (1) Consider the carbon dioxide molecule, CO,, and the carbonate ion, CO2- (1) Draw the complete Lewis electron-dot structure for each species. (ii) Account for the fact that the carbon-oxygen bond length in CO, - is greater than the carbon-oxygen bond length in CO, (h) Consider the molecules CF, and SF, (1) Draw the complete Lewis electron-dot structure for each molecule. (11) In terms of molecular geometry, account for the fact that the CF, molecule is nonpolar, whereas the SF, molecule is polar
The fact is the carbon-oxygen bond length in CO₃²⁻ is greater than the carbon-oxygen bond length in CO₂ because of its bond order. CF4 has a tetrahedral geometry, so the bond dipoles cancel, leading to a nonpolar molecule. SF4 exhibits a trigonal bipyramidal electronic geometry, with the lone pair of electrons so SF₄ is polar.
Due to resonance, the bond character of CO₃²⁻ lies between a single and a double bond, whereas CO₂ has two double bonds (linear structure with carbon as the central atom, O=C=O). Bond length is inversely proportional to bond order, and bond order depends on the number of bonds. Therefore, CO will have triple bonds, while CO₂ will have two double bonds. Therefore, the order of bond length will be CO₃²⁻>CO₂ >CO.
Due to the tetrahedral geometry of CF₄, the bond dipoles cancel and the molecule becomes nonpolar. The core S atom is surrounded by five pairs of electrons, and SF₄ displays a trigonal bipyramidal electronic geometry.
The molecule is polar because the bond dipoles in this configuration do not cancel.
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write the principle involved in the manufacture of steel by open health process
Answer:
The open-hearth furnace will use the heat of combustion of gaseous or liquid fuels to convert a charge of scrap and liquid blast-furnace iron to liquid steel. The high flame temperature required for melting is obtained by preheating the combustion air and, sometimes, the fuel gas.
Explanation:
you rent a car in Germany with a gas mileage rating of 10.9 km/L. What is its rating in miles per gallon?
The mileage rating of the rent car is given 10.9 km/L. the mileage rating in miles per gallon is 25.63 mpg.
What is mileage rating ?The distance that a vehicle travels in unit volume of fuel is called its mileage rating. It depends on the performance of the vehicle such as fuel consumption, engine efficiency, feasibility of rods etc.
Mileage rate for each type of vehicles are different. Mileage is mainly expressed in miles per gallon. Gallon is a unit of volume of fluids.
1 km/L = 2.352 miles per gallon.
Hence, 10.9 km/L is converted to mpg as follows:
10.9 km/L = 10.9 km/L × 2.352 mpg/ 1 km/L = 25.6 mpg
Therefore, the mileage rating of the car is 25.6 miles per gallon.
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Methylation, which is the addition of-CH, groups to a larger structure, is common in certain RNA molecules. One common pattern of methylation is the double methylation of nitrogen number 2 in guanine to form N2, N2-dimethylguanine, shown below. NH Nitrogen 2 a. In a typical guanine cytosine base pair, does nitrogen number 2 typically act as a hydrogen bond donor or acceptor? b. In terms of H-bonds that are broken and formed, explain why the formation of a base pair between N2 N2-dimethyluanine and cytosine is less favorable than the formation of a typical guanine-cytosine base pair
a. Nitrogen number 2 in guanine typically acts as a hydrogen bond acceptor.
b. N2, N2-dimethylguanine (N2-meG) is less favorable in forming base pairs with cytosine than typical guanine-cytosine (G-C) base pairs because the methylation at nitrogen number 2 changes its properties, causing a decrease in the number of hydrogen bonds and stability of the base pair.
The methyl group disrupts the hydrogen bonding potential of nitrogen number 2, reducing the number of hydrogen bonds formed between N2-meG and cytosine. This leads to a decrease in the stability of the N2-meG: cytosine base pair compared to a typical G-C base pair.
Methylation is the addition of a methyl group (-CH3) to a molecule, and is a common pattern of modification in RNA molecules. One specific pattern of methylation is the double methylation of nitrogen number 2 in guanine to form N2, N2-dimethylguanine (N2-meG). In a typical guanine-cytosine (G-C) base pair, nitrogen number 2 acts as a hydrogen bond acceptor, forming two hydrogen bonds with the nitrogen atoms in the cytosine ring.
However, the formation of a base pair between N2-meG and cytosine is less favorable than the typical G-C base pair due to the effect of the added methyl groups. The methyl groups disrupt the hydrogen bonding potential of nitrogen number 2, reducing the number of hydrogen bonds that can be formed between N2-meG and cytosine. As a result, the stability of the N2-meG: cytosine base pair is lower compared to the G-C base pair.
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Which of the following compounds would be expected to form intermolecular hydrogen bonds in the liquid state? (a) CH3OCH3 (dimethyl ether), (b) CH4, (c) HF, (d) CH3CO2H (acetic acid), (e) Br2, (f) CH3OH (methanol)
Thus, the compounds among the given options which are expected to show intermolecular hydrogen bonding are:
(c) Hydrogen fluoride-HF
(d) Acetic acid
(f) Methanol
The correct answer will be option(c), (d) and (f).
Intermolecular forces is defined as the force which acts between molecules. The examples of intermolecular forces include the London dispersion force, dipole-dipole interaction, ion-dipole interaction, and Van der Waals forces. The compounds among the given options which are expected to show intermolecular hydrogen bonding are hydrogen fluoride, acetic acid and methanol.
The types of intermolecular forces present in the given compounds are,
Acetone
Acetone, a ketone, does not possess hydrogen attached to the electronegative oxygen atom and is not expected to show intermolecular hydrogen bonds.
Methane
Methane does not produce any intermolecular hydrogen bonds due to the inefficiency of conditions allowed for hydrogen bonding.
Hydrogen fluoride
The compound shows intermolecular hydrogen bonding due to the attachment of hydrogen to electronegative fluorine.
Acetic acid
The hydroxyl hydrogen in acetic acid is capable of forming hydrogen bonds.
Bromine
The molecular bromine cannot create hydrogen bonding due to the lack of electrons after the covalent bonding.
Methanol
The methanolic hydrogen is capable of forming intermolecular hydrogen bonding.
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An infant weighing 17.5 lb has been exposed to the flu virus in the community. The recommended dose of a prophylactic Tamiflu treatment is 3.00 mg per kg b.i.d. How many times a day should Tamiflu be administered?
How many milligrams of Tamiflu should be given at every administration?
Answer:
11.97 mg.
Explanation:
divide the weight by 2.2046 to get the weight (in kilograms).
17.5 lb / 2.2046 = 7.98 kg
The dose of Tamiflu can be calculated by multiplying the weight of the infant in kilograms by the recommended dose of 3.00 mg/kg.
7.98 kg * 3.00 mg/kg = 23.94 mg
Tamiflu is recommended to be given twice a day, so the total dose of Tamiflu should be divided by 2.
23.94 mg / 2 = 11.97 mg per administration
Therefore, Tamiflu should be given to the infant twice a day, and each administration should be 11.97 mg.
Answer:
twice a day23.81 mgExplanation:
You want to know the dosage in milligrams for an infant weighing 17.5 lb when the prescription is 3.00 mg/kg b.i.d.
MassThe conversion factor for pounds to kilograms is ...
1 lb = 0.45359237 kg . . . exactly
This means that 17.5 lb corresponds to ...
17.5 lb × 0.45359237 kg/lb = 7.937866475 kg
DoseAt 3.00 mg/kg, the required dose is ...
(3.00 mg/kg)(7.937866475 kg) ≈ 23.81 mg
Each administration of the medicine should be 23.81 mg.
FrequencyThe abbreviation b.i.d. is for the Latin "bis in die", which means "twice a day."
The medicine should be administered 2 times a day.
Imagine a product favored chemical reaction happening in a living organism in which a substance D goes to E. It is known that the concentration of D remains well above zero and constant over time.
Given that the reaction is product-favored, how is the concentration of D maintained? Give two possible reasons.
How might the catalysis of the reaction maintain the concentration of D?
The concentration of substance D in a product-favored chemical reaction is maintained because the reaction is moving towards a state of lower energy, in which the concentration of E is at a maximum. There are two possible reasons for this:
The reaction has a high activation energy, meaning that the reaction requires a lot of energy to get started.
The reaction has a negative delta G, meaning that the reaction releases energy, so it moves towards completion spontaneously.
Catalysis of the reaction may maintain the concentration of D by increasing the reaction rate, allowing the reaction to reach a state of lower energy more quickly.
The catalyst works by lowering the activation energy of the reaction, making it easier for the reaction to get started. This means that the concentration of D can be maintained at a relatively constant level over time, even though the reaction is moving towards a state of lower energy.
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The volume of a sample of gas is measured as 3690.5 cm³.
Convert the volume to cubic meters.
3690.5 cm³ = _____ m^3
The volume of a sample of gas in cubic meters (m³) is 3.6905 × 10-³m³
How to calculate volume?Volume is the three-dimensional measure of space that comprises a length, a width and a height.
Volume is measured in units of cubic centimeters in metric, cubic inches or cubic feet in English measurement.
The volume of a substance in cm³ (cubic centimetres) can be converted to cubic meters as follows:
1 cubic centimetre = 1 × 10-⁶ cubic metre
3690.5cm³ = 3690.5 × 1 × 10-⁶
3.6905 × 10-³m³
Therefore, 3.6905 × 10-³m³ is the volume of sample of gas in cubic meters.
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A sample of metal has a mass of 20.11 g, and a volume of 6.03 mL. What is the density of this metal?
Density is a physical property of matter and is defined as the mass per unit volume of a substance. It can be calculated by dividing the mass of the substance by its volume.
To find the density of the metal, we can use the following formula:
Density = Mass/Volume
For the given sample, the mass is 20.11 g and the volume is 6.03 mL. So, we can plug in the values into the formula and get:
Density = 20.11 g / 6.03 mL
To get the final density of the metal, we need to convert the units of volume to cm^3 as the density is usually given in g/cm^3
1ml = 1cm³
So, 6.03 ml = 6.03 cm³
Density = 20.11 g / 6.03 cm³
Density = 3.344 g/cm³
Therefore the density of the metal is 3.344 g/cm³
changing gloves often will minimize the spread of chemicals. to properly remove gloves, first, choose... , and then, choose... . then insert choose... between the interior edge of the second glove and the skin, and remove the second glove.
Choices:
grasp the exterior of one glove with a gloved hand grasp the exterior of one glove with a bare hand insert a gloved finger into one glove
Peel out the glove away from your body, pulling it inside out. Peel the glove away from your body by grasping the outside of one glove at the wrist. Don't touch your bare skin with that hand.
A chemical is defined as any substance that has a defined composition. We can also say that, a chemical is always made up of the same "stuff." Some chemicals occur in nature, such as water while most of them are man - made.
Steps required to remove gloves:
The first step includes grasping of the palm of one glove near your wrist. Carefully pull out the glove off, turning it inside out.
In the next step hold the glove in the palm of the still-gloved hand.
Now you must pull out the glove until it comes off inside out.
Always make sure to wash your hands after removing gloves and before touching any objects or surfaces.
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the acidity of a compound is influenced by the electronegativity of the element bonded to h. this effect is more important when comparing elements in the same period than in the same group. for similar acids of general formula ha, electronegativity of a ______ across a period and acidity therefore ______.
The electronegativity of an element affects the acidity of a compound. This effect is more important when comparing elements in the same period than in the same group.
The acidity and the element's long-term electronegativity differ for similar acids with the general formula HA. How drawn an atom is to the bonding electrons in molecules as opposed to other atoms is referred to as its "electronegativity."
The electronegativity values were created by American chemist Linus Pauling and range from a little under one for alkali metals to a maximum of four for fluorine. Large electronegativity levels display a stronger attraction for electrons when compared to smaller values.
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