Option (d) is correct. According to the lab safety guidelines, if you accidentally broke a test tube and spilled a chemical on the table you should caution your lab partners to avoid the area while you inform the teacher of the small accident.
We should follow the lab safety guidelines. We should clean the chemical if we totally know about the chemical. Cleaning with water is totally dangerous as you know adding water to concentrated solution cause fire in the lab or extremely exothermic reaction occur. It is very risky to use water to clean the spill. The things like disposing test tube in special container is a good step. There are some chemical which are very harmful and smell very poisonous. so its very risky throwing the sharp test tube glass pieces into bin without disposal is dangerous.
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A farmer applies 1305 kg of a fertilizer that contains 10.0% nitrogen to his fields each year. Fifteen percent (15.0%) of the fertilizer washes into a river that runs through the farm.
If the river flows at an average rate of 0.370 cubic feet per second, what is the additional concentration of nitrogen (expressed in milligrams of nitrogen per liter) in the river water due to the farmer's fertilizer each year?
Answer:
0.139
Explanation:
In the laboratory you dissolve 20.7 g of manganese(ii) sulfate in a volumetric flask and add water to a total volume of 125 ml.
The molarity of the solution is 1.09 M
Manganese (II) sulfate chemical formula is MnSO₄ As a result, we begin by determining its molecular weight (Mw) as follows:
Mw MnSO₄= molar mass Mn + molar mass S) + (4 x molar mass 0)
Mw MnSO₄= 55 g/mol + 32 g/mol + (4 x 16 g/mol) = 151. g/mol
The number of moles in the given mass of MnSO₄ is then determined using Mw:
moles MnSO₄= mass/Mw
moles MnSO₄= 20.7 g/(151g/mol)= 0.137 mol
moles MnSO₄ = 0.137 mol
We now convert the value from mL to L because we need the final volume in liters:
125 mL x 1 L/1000 mL = 0.125 L
In order to calculate the molarity in mol/L, we divide the moles of Mn(NO₃)₂ into the volume in L.
M= 0.133 moles/0.125 L = 1.06 mol/L= 1.09 M
Your question is incomplete but most probably your full question was
In the laboratory you dissolve 20.7 g of manganese(ii) sulfate in a volumetric flask and add water to a total volume of 125 ml. What is the molarity of the solution
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two or more substances in variable proportions, where the composition is same trough out (constant) throughout are
Two or more substances in variable proportions, where the composition is constant throughout, are known as homogeneous mixtures.
A homogeneous mixture is a mixture where the composition is uniform throughout and the components of the mixture are not visually distinguishable. Examples of homogeneous mixtures include solutions, suspensions, and colloids.
Colloids are homogeneous mixtures of two or more substances in which the particles of one substance are dispersed evenly throughout the particles of the other. The particles in a colloid are usually intermediate in size between those of a solution and those of a suspension, and they do not settle out. Examples of colloids include milk, fog, and paint.
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What is the limiting reactant and how much excess reactant is leftover of:
4H2O+7CO2---> C7H8+9O2
starting with
50gH2O
250gCO2
Answer:
The limiting reactant is the reactant that is completely consumed before the other reactant(s) in a chemical reaction. To find the limiting reactant, we need to find how much product is formed from each reactant, and then compare which reactant forms the least amount of product.
The balanced equation for the reaction is 4H2O+7CO2---> C7H8+9O2
From the given data, we have 50g of H2O and 250g of CO2.
We can calculate the limiting reactant by using the stoichiometry of the equation.
The stoichiometry is the relationship between the amount of reactants and products in a balanced chemical equation.
From the balanced equation, we know that 4 moles of H2O and 7 moles of CO2 are needed to produce 1 mole of C7H8 and 9 moles of O2.
From the data we have, 50g of H2O is equivalent to 2.86 moles H2O.
And 250g of CO2 is equivalent to 5.36 moles of CO2.
Now, using the balanced equation, we can calculate the amount of product that forms from each reactant:
From 2.86 moles of H2O: 2.86 moles H2O * (1 mole C7H8 / 4 moles H2O) = 0.715 moles C7H8
From 5.36 moles of CO2: 5.36 moles CO2 * (1 mole C7H8 / 7 moles CO2) = 0.766 moles C7H8
As we can see, the CO2 is the limiting reactant because it forms less product than H2O.
The amount of excess reactant is the amount of the reactant that is not used up in the reaction, we can calculate this by subtracting the amount of product that forms from the limiting reactant from the initial amount of the reactant.
Excess reactant of H2O is 50g - (0.715 moles * 18.02g/mol) = 37.5g
Excess reactant of CO2 is 250g - (0.766 moles * 44.01g/mol) = 191g
So, the limiting reactant is CO2 and there is 191g of excess CO2 leftover.
Explanation: In a chemical reaction, the limiting reactant is the reactant that is completely consumed before the other reactant(s) run out. The limiting reactant determines the maximum amount of product that can be formed.
To determine the limiting reactant, we need to calculate the number of moles of each reactant present.
The moles of H2O: 50g/18g/mol = 2.778 moles
The moles of CO2: 250g/44g/mol = 5.68 moles
Next, we can use the coefficients in the balanced chemical equation to find the number of moles of each reactant required to react with each other.
The number of moles of H2O required: 4 moles H2O / 4 moles H2O/1 mole C7H8 = 1 mole C7H8
The number of moles of CO2 required: 7 moles CO2 / 1 mole C7H8 = 7 moles CO2
From the above we can see that H2O is the limiting reactant since it is consumed before the CO2.
To calculate the excess reactant, we subtract the number of moles of the limiting reactant from the number of moles of the other reactant.
The excess moles of CO2 = 5.68 moles - 1 mole = 4.68 moles
The excess moles of H2O = 0 moles (since H2O is limiting reactant)
The mass of the excess CO2 = 4.68 moles x 44 g/mol = 205.12 g
So, CO2 is the excess reactant and 205.12 g of CO2 is leftover.
PLEASE HELP MY TEACHER SAID I NEED TO SHOW MY WORK I WILL GIVE YOU AS MANY POINTS AS I POSSIBLY CAN MY TEST IS TOMORROW MORNING HELP ME. THIS IS GAS LAWS CHEMISTRY 10TH GRADE LEVEL HONORS.
The volume of the gas at 40 degrees C, given that it's volume was 60 L at 301.5 K is 62.3 L
How do I determine the volume at 40 degrees C?From the question given above, the following data were obtained:
Initial volume (V₁) = 60 LitersInitial temperature (T₁) = 301.5 KNew temperature (T₂) = 40 degree C = 40 + 273 = 313 KNew volume (V₂) =?Using Charles' law equation, we can obtain the volume of the gas at 40 degrees C as illustrated below:
V₁ / T₁ = V₂ / T₂
60 / 301.5 = V₂ / 313
Cross multiply
301.5 × V₂ = 60 × 313
301.5 × V₂ = 18780
Divide both side by 301.5
V₂ = 18780 / 301.5
V₂ = 62.3 L
Thus, we can conclude from the above calculation that the new volume of the gas is 62.3 L
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The new volume of the gas is 62.3 L.
What is the volume of the gas?We have to use the Charles law here. In this law, the volume of a gas is directly proportional to its temperature (in kelvins), provided that the pressure and number of moles of the gas remain constant. It can be expressed as: V/T = k, where V is the volume, T is the temperature in kelvins, and k is a constant.
We have that;
V1/T1 = V2/T2
V1 = initial volume]
V2 = final volume
T1 = initial temperature
T2 = final temperature
Then;
V1T2 = V2T1
V 2 = V1T2 /T1
V2 = 60 * 313/301.5
V2 = 62.3 L
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The pressure of a gas sample was measured to be 854 mmHg. What is the pressure in kPa? (
1 kPa is equal to 0.145038 PSI. Pascal or kilopascal, as well as in many other units including torr, atmosphere, and bar.
What unit of measurement defines gas pressure?A gas’s pressure can be represented in the SI units of pascal or kilopascal, as well as many other units such as torr, atmosphere, and bar. A barometer is used to measure atmospheric pressure; other gas pressures can be measured with one of various types of manometers.
Millimeters of mercury (mm Hg) is the most often used pressure unit. Pressure is commonly measured in atmospheres. One atmosphere of pressure (atm) is equal to 760 millimeters of mercury (mm Hg). Pressure is represented in SI in derived units called pascals. At a temperature of 60 degrees Fahrenheit and an atmospheric pressure of 14.7 pounds per square inch, gas is frequently measured in cubic feet. Production of natural gas
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In the Photosynthesis Lab part of the OMS lesson, you changed the amount of light intensity, temperature, and CO2 level.
Below is a graph showing data collected of the oxygen flow at different amounts of light intensity.
According to this graph, what percent of light intensity would the rate of photosynthesis be the greatest?
(A)11%
(B)38%
(C)21%
(D)30%
Photosynthesis will be greatest at 30% light intensity according to the graph.
How does light intensity affect photosynthesis?Light intensity affects photosynthesis by providing the energy needed for the process to occur. At low light intensities, photosynthesis proceeds at a slower rate, while at higher light intensities, photosynthesis proceeds at a faster rate. At 30% increase, rate of photosynthesis will increase.
However, if the light intensity is too high, it can damage or kill the plant, as it can cause the temperature inside the leaf to rise, leading to thermal stress. This can lead to a decrease in the rate of photosynthesis, or even a complete cessation of the process.
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The theory of what explain how new crust created at mid ocean ridges
Answer:
The theory of seafloor spreading explains how new crust is created at mid-ocean ridges.
Explanation:
This theory proposes that the Earth's crust is made up of tectonic plates that move and spread apart from each other, allowing molten material from the mantle to rise up and fill the gap, forming new crust. This process of plate tectonics also explains the formation of mountain ranges, volcanoes, and earthquakes.
sulfuric acid is probably the most important industrial chemical because it is used in so many industrial processes to produce or purify other chemicals. it can be produced by a three step process. first, sulfur is burned in air to give sulfur dioxide. second, the sulfur dioxide is converted to sulfur trioxide by passing the sulfur dioxide over a catalyst in the presence of oxygen at a high temperature. third, the sulfur trioxide is reacted with water formed from 1.00 x 103 kg of sulfur, if the three steps gave yields as listed below? how much sulfuric acid can be made from 1.00 x 103 kg of sulfur.s o2 so2 92.5%2so2 o2 2so3 72.6%so3 h2o h2so4 98.2%
1.00 x 10^3 kg of sulfur can produce 661.94 kg of sulfuric acid.
To calculate the amount of sulfuric acid that can be made from 1.00 x 10^3 kg of sulfur:
First, the amount of sulfur dioxide produced from 1.00 x 10^3 kg of sulfur can be calculated:
1.00 x 10^3 kg x 92.5% = 925 kg of sulfur dioxide
Next, the amount of sulfur trioxide produced from the sulfur dioxide can be calculated:
925 kg x 72.6% = 673.67 kg of sulfur trioxide
Finally, the amount of sulfuric acid produced from the sulfur trioxide can be calculated:
673.67 kg x 98.2% = 661.94 kg of sulfuric acid
Therefore, 1.00 x 10^3 kg of sulfur can produce 661.94 kg of sulfuric acid.
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which situation is in equilibrium
Answer: A) The amount of air in a room never changes.
What is equilibrium?It is a state of balance between opposing forces or actions that is either static (as in a body acted on by forces whose resultant is zero) or dynamic (as in a reversible chemical reaction when the rates of reaction in both directions are equal).
Economic equilibrium is a condition or state in which economic forces are balanced. In effect, economic variables remain unchanged from their equilibrium values in the absence of external influences.
a) The amount of air in a room never changes: the amount of air does not change as the amount of air leaving the room is same as that of the air entering the room and hence the reaction is in equilibrium.
b) The amount of water in a cup decreases as it evaporates: The amount of water is decreasing that means the reaction is taking place in one direction and hence the reaction is not in equilibrium.
c) The percentage of nitrogen gas in a room decreases steadily: the amount decreases that means the reaction is taking place in one direction and hence the reaction is not in equilibrium.
d) A blade of grass grows taller : the plant gets taller that means the reaction is taking place in one direction and hence the reaction is not in equilibrium
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A piece of cardboard is 12.0 cm long, 6.3 cm wide and 0.75 millimeters thick. What is the volume of this piece of cardboard in cubic meters
Answer:
5.67 cm^2
Explanation:
From the given Lewis structure and what you know about VSEPR theory, identify the shape of the molecule.
trigonal pyramidal
see-saw
linear
bent
tetrahedral
trigonal planar
trigonal bipyramidal
square planar
square pyramidal
T-shaped
octahedral
Explanation:
square pyramidal
T-shaped
octahedral
The addition of an oxidizing agent such as chlorine water to a clear solution of an unknown compound results in the appearance of a brown color. When this solution is shaken with the organic solvent, methylene dichloride, the organic solvent layer turns purple. The unknown compound probably contains:
Answer:
The unknown compound probably contains a chromophore, which is a structural element that causes a compound to have a specific color. The addition of an oxidizing agent such as chlorine water causes the appearance of a brown color, indicating that the compound contains an electron-rich chromophore. The fact that the organic solvent layer turns purple when the solution is shaken with methylene dichloride suggests that the compound also contains a chromophile, which is a structural element that can form a complex with an electron deficient species like the dichloromethane solvent. The compound probably contains a conjugated system of double bonds, which can act as both chromophore and chromophile, and that is why the color changed from brown to purple after shaking with the organic solvent.
calculate the inital tempature of 20 grams of pure carbon graphite was added to 60 grams of pute water at 20°c in a calorimiter the final tempature wss found to be 24°c the sorcific heay capacity of carbon graphite is .709j/g°c and that of water is 4.18j/g°c assume constant pressure and no added heat loss to the calorimiter nor surroundings
Answer:
The initial temperature of the carbon graphite before it was added to the water was 31.69°C.
Explanation:
To calculate the initial temperature, we need to use the formula for heat:
Heat = Specific heat capacity x mass x change in temperature
The heat absorbed by the water is:
Heat absorbed by water = 4.18 J/g°C x 60 g x (24°C - 20°C) = 10,212.8 J
The heat absorbed by the carbon graphite is:
Heat absorbed by carbon graphite = 0.709 J/g°C x 20 g x (Tinitial - 20°C) = 1418.Tinitial - 28360
Since heat is conserved, the heat absorbed by the carbon graphite is equal to the heat absorbed by the water:
1418.Tinitial - 28360 = 10,212.8 J
Tinitial = (10,212.8 + 28360) / 1418 = 31.69°C
The initial temperature of the carbon graphite before it was added to the water was 31.69°C.
determine the solubility of following samples in water by adding a few milligrams to about 10ml of water. Record your observations in a tabular form
Each functional group has a particular set of chemical properties that it to be identified.
What is meant by determination of solubility ?The maximum amount of solute that can dissolve in a known quantity of solvent at a certain temperature is its solubility.
The solubility of the compound is determined as the concentration of unionized compound in solution when the measured pH slope is interpolated to zero.
These properties can be demonstrated by observing solubility behavior, while others can be in chemical reactions that are accompanied by color changes, precipitation formation, or other visible affects.
According to the presence of their functional group, organic compounds can be classified in different families and class.
The types of compounds soluble in a particular solvent are summarized on the following:
Water Soluble Compounds
5% Sodium Hydroxide Soluble Compounds
5% Sodium Bicarbonate Soluble Compounds
5% Hydrochloric Acid Soluble Compounds
96% Sulfuric Acid Soluble Compounds
Solubility of Amphoteric Compounds
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1. What is the pH of Glutamic Acid when the gamma carboxylic acid is 30% dissociated?
1B. What is the net charge on the molecule at that pH?
2. Calculate the pH of Histidine when the alpha amino group is 2/3 dissociated?
The pH of Glutamic acid is 3.94. The net charge is a negative charge and the pH of Histidine is 6.30.
How to find the pH?To calculate the pH of glutamic acid when the gamma carboxylic acid is 30% dissociated, we need to know the dissociation constant (pKa) of the group. The pKa of the gamma carboxylic acid of glutamic acid is around 4.3.
To find the pH, we need to use the Henderson-Hasselbalch equation, which is:
pH = pKa + log([A-]/[HA])
where [A-] is the concentration of the dissociated form and [HA] is the concentration of the undissociated form of the acid. If 30% of the carboxylic acid is dissociated, then [A-]/[HA] = 0.3/0.7 = 0.43.
So, the pH = 4.3 + log(0.43) = 4.3 + (-0.36) = 3.94
1B. To determine the net charge on the molecule, we need to consider the dissociation of both the alpha carboxylic acid and the gamma carboxylic acid. At the pH of 3.94, both the alpha and gamma carboxylic acids are partially dissociated and carry a negative charge. The exact charge depends on the exact dissociation of each group and the overall molecular structure. In general, the net charge on the molecule is dependent on the pH and the dissociation constants of the functional groups.
To calculate the pH of histidine when the alpha amino group is 2/3 dissociated, we need to know the dissociation constant (pKa) of the group. The pKa of the alpha amino group of histidine is around 6.0.
We can use the Henderson-Hasselbalch equation to find the pH:
pH = pKa + log([NH2-]/[H2N-H])
where [NH2-] is the concentration of the dissociated form and [H2N-H] is the concentration of the undissociated form of the acid. If 2/3 of the amino group is dissociated, then [NH2-]/[H2N-H] = 2/3 / (1/3) = 2.
So, the pH = 6.0 + log(2) = 6.0 + 0.301 = 6.30
Note that the pH calculated here is just an estimate and the exact pH would depend on the other functional groups present in the molecule and their dissociation constants.
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Convert a speed of 931 cm/s
to units of inches per minute. Also, show the unit analysis by dragging components into the unit‑factor slots.
To convert a speed of 931 cm/s to inches per minute, we can use the conversion factor of 1 inch = 2.54 cm.
931 cm/s x (1 inch/ 2.54 cm) x (60 seconds/minute) = 34,843.58 inches/minute
Unit Analysis:
931 cm/s x (1 (inch) / 2.54 cm) x (60 (seconds/minute)) = 34,843.58 inches/minute
a candle is lit with a match and places in a glass jar. classify the observations as physical or chemical changes:
-the candle wax melts
-the candle wick burns
-the glass jar gets hot
-soot is deposited on the inside of the ja
The melting of the candle wax and the burning of the candle wick are physical changes, as the molecules of the wax and wick have been rearranged and heated but their chemical composition has not changed.
The glass jar getting hot and the soot being deposited on the inside of the jar are both chemical changes, as the molecules of the glass and the soot have been chemically altered.
Chemical changes occur when a substance undergoes a chemical reaction, resulting in the formation of new substances.
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The optical rotations of sucrose in 0.5 M HCl measured in seconds at 0, 20 and ∞ are +32.4, +25.5 and -11.1 respectively. Determine the order of the reaction.
ln a = −1.1491 − 3.6697 × 10−3t
How to determine the order of the reaction?The first order integrated rate law is
kt = ln (a0/a)
ln a=ln a0 − kt
A plot of ln(a) vs. t would, therefore, yield a straight line whose slope will be equal to −k. The result of the linear regression (Excel can easily do this) is
ln a = −1.1491 − 3.6697 × 10−3t
Therefore, the rate constant is 3.6697 × 10−3 s−1. Note that the intercept has approximately the correct value of ln a0.
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X-rays from a copper X-ray tube (λ = 1.54 Å) were diffracted at a scattering angle of 14.22° by a crystal of silicon. Assuming first-order diffraction (n = 1), what is the interplanar spacing in silicon in Å? (1 Å = 10⁻¹⁰ m)
This is what am i working on, but the answer came out is not correct.
What am i mixing in this problem?
Answer:
313.52 pm
Explanation:
Perhaps you should check your working:
[tex]\frac{1 * 154}{2 * 0.2456}[/tex]
≈ 313.52
(I have used a calculator lol, my arithmetic skills are terrible when I am not dealing with numbers in scientific notations)
Hope this helps :)
The speed of light is 2.998*10^8 . How far does light travel in 5.0µs?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.
Answer:
d = (2.998 x 10^8 m/s) * (5.0 x 10^-6 s)
Explanation:
Red gold is a gold‑copper alloy used to make jewelry. A piece of jewelry made of red gold weighs 7.74 g and has a volume of 0.553 cm3. Gold has a density of 19.3 g/cm3 and copper has a density of 8.96 g/cm3. Calculate the percentage by mass of each metal in the jewelry. Assume the total volume of the jewelry is the sum of the volumes of the two metals it contains.
Pure gold is defined as having 24 carats. When mixed in an alloy, the carats of gold are given as a percentage of this value. For example, a piece of jewelry made with 50% gold has 12 carats. State the purity of this piece of red gold jewelry in carats.
The percentage by mass of each metal in the jewelry is given as :
The percentage by mass of gold is : (mass of gold / total mass of jewelry) x 100% = (10.65 g / 7.74 g) x 100% = 137.5%
and the percentage by mass of copper is : (mass of copper / total mass of jewelry) x 100% = (4.91 g / 7.74 g) x 100% = 63.5%
Question 2
The piece of red gold jewelry has a purity of : (137.5%) x 24 = 33 carats
What is meant by percentage by mass?percentage by mass is described as a way of expressing a concentration or describing the component in a particular mixture.
We know that the piece of red gold jewelry contains 137.5% gold and 63.5% copper by mass.
To calculate the carats, we will use the formula:
carats = (percentage of gold in alloy) x 24
Therefor, the piece of red gold jewelry has a purity of : (137.5%) x 24 = 33 carats.
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How much water is present in 220.0 g of CuSO4 · 5H₂O?
The molecular weight of CuSO4 · 5H2O is 249.69 g/mol, so 220.0 g of CuSO4 · 5H2O would contain 0.88 mol of CuSO4 · 5H2O.
How much water is present in 220.0 g of CuSO4 · 5H₂O?Since there are 5 moles of water for every 1 mole of CuSO4 · 5H2O, 0.88 mol of CuSO4 · 5H2O would contain 4.4 moles of water.Since 1 mole of water is 18.015 g, 4.4 moles of water would be 79.06 g of water.Therefore, there is 79.06 g of water present in 220.0 g of CuSO4 · 5H2O.CuSO4 · 5H₂O is a copper sulfate pentahydrate compound, which means that it consists of one copper ion, one sulfate ion, and five water molecules. The molar mass of this compound is 249.68 g/mol, and its chemical formula is CuSO4 · 5H2O. The amount of water present in 220.0 g of this compound can be calculated by dividing the mass of the compound by the molar mass.The amount of water present in 220.0 g of CuSO4 · 5H2O can be calculated as follows:220.0 g / 249.68 g/mol = 0.88 molSince there are five water molecules per mole of CuSO4 · 5H2O, the number of moles of water present in 220.0 g of this compound is equal to 0.88 x 5 = 4.4 moles.The mass of 4.4 moles of water can be calculated as follows:4.4 moles x 18.015 g/mol = 79.06 gTherefore, 79.06 g of water is present in 220.0 g of CuSO4 · 5H2O. This means that 35.6% (79.06 g / 220.0 g x 100%) of the mass of this compound is water.CuSO4 · 5H2O is an ionic compound that is widely used in a variety of applications, such as fertilizer, pesticide, water treatment, and the production of paper, textiles, and ceramics. It is also used in the production of certain dyes and pigments.To learn more about The molecular weight refer to:
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Which of the following quantities will always be the same before and after a chemical reaction?
The total number of neutrons of each element
The total mass of all substances
The total number of atoms of each element
The total mass of each substance
The total mass of each element
The total number of electrons of each element
The total number of molecules
The total number of neutrons
The total number of electrons
The total volume occupied by each element
The total number of protons
The total number of atoms
The total number of protons of each element
The total volume occupied by all substances
Answer:
The total mass of all substances and the total number of atoms of each element will always be the same before and after a chemical reaction, this is based on the Law of Conservation of Mass and the Law of Conservation of atoms. This law states that in any chemical reaction, the total mass of the reactants is equal to the total mass of the products and the number of atoms of each element is conserved.
The diagram below shows a person holding a ball standing at three different places on earth. if the person drops the ball, gravity will make it fall.
If the person drops the ball, its velocity gets bigger and bigger as it falls.
What effect does gravity have on a falling ball?
When something falls, it is due to gravity. Because the item feels a force, it accelerates, causing its velocity to increase as it falls. A sort of acceleration is the force with which the Earth pushes on something in the form of gravity. The Earth exerts the same amount of force on everything.
Gravity is the force that causes objects to fall to the ground. When you drop a ball (or anything else), it falls to the ground. Everything falls at the same rate due to gravity. When you drop the ball, gravity pulls it down and accelerates it. It collides with the ground and squashes at contact. As the squished ball recovers its former shape
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Complete question:
The diagram below shows a person holding a ball standing at three different places on earth. if the person drops the ball, gravity will make it fall.
Which of the following diagrams best shows the direction the dropped ball will fall at the three different positions?
b. b
a. a
c. c
d. d
How many grams of sucrose (C12H22011) would you need for a 2L of a 2M solution?
Explanation:
To calculate the amount of sucrose needed to make a 2 L of a 2 M solution, you can use the formula:
moles = concentration (M) * volume (L)
moles of sucrose = 2 M * 2 L = 4 moles
Then, convert moles to grams using the molecular weight of sucrose (342.30 g/mol)
grams of sucrose = 4 moles * 342.30 g/mol = 1369.2 g
So, you would need 1369.2 g of sucrose to make a 2 L of a 2 M solution.
question 3. calculate evapotranspiration using the watershed water balance equation (35 points). g
We can calculate evapotranspiration by using the formula, ET=P-R-TWSC, where P is precipitation, R is runoff and TWSC is change in terrestrial water change.
Evapotranspiration is defined as water evaporation into the atmosphere from the soil surface, evaporation from the capillary fringe of the groundwater table, and evaporation from water bodies on land. Generally, evapotranspiration also includes transpiration, which is the water movement from the soil to the atmosphere through plants.
When we want to estimate the ET (evapotranspiration) using the water balance method: ET=P-R-TWSC, where P is precipitation, R is runoff and TWSC is change in terrestrial water change.
This question is incomplete so I have answered on general basis.
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rank the following compounds in order of increasing acidity (least to most acidic) using the periodic table. start with the least acidic compound at the top of the list. h2s sih4 ph3
The following compounds should be ranked in order of increasing acidity, starting with the least acidic compound at the top: SiH4, H2S, PH3.
Analysis of each compound:SiH4 is the least acidic compound, as it is a covalent hydride that is unlikely to produce a hydrogen ion in water. H2S is more acidic than SiH4, as it is a molecular hydride that can form hydrogen ions when dissolved in water. PH3 is the most acidic compound, as it is a molecular hydride with a high degree of polarity, which allows it to easily donate a hydrogen ion when dissolved in water.Learn more about acidity compounds:
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Name each compound.
A. A six carbon ring with alternating double bonds contains a CH2 CH3 group at carbon 1 and carbon 3. compound A name:
B. A six carbon ring with alternating double bonds contains a Cl atom at carbons 1, 2, and 4. compound B name:
C. A six carbon ring with alternating double bonds contains an O
The name of each compound is:
Compound A is a chloromethane molecule, also known as methyl chloride [tex](CH_{2} Cl)[/tex]. Compound B is a chloroform molecule, also known as trichloromethane [tex](CHCl_{3})[/tex]. Compound C is an ether molecule, specifically an ethoxyethane [tex](C_{2}H_{5}OC_{2}H_{5})[/tex].An ether molecule consists of two hydrocarbon groups connected by an oxygen atom. This type of molecule is an organic compound which is characterized by its low boiling and melting points, and its low solubility in water. Ether molecules are widely used in organic synthesis and as solvents.
These molecules are highly flammable and can be explosive when mixed with air. They are also highly volatile, meaning that they can easily evaporate into the atmosphere and can be difficult to contain. Because of these properties, ether molecules are often used as a fuel in small engines and rockets.
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For the following reactions, calculate the ionization constant of each reaction. HCl (aq) + H2O (l) equation H3O+ (aq) + Cl- (aq); [HCl] = 16.9M, [H3O+] = 13.3M, [Cl-] = 7.4MKa =
The ionization constant for the given chemical equation is 5.82 as shown in the calculations.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
Ionization constant is given as , [H₃O[tex]^+[/tex]][Cl[tex]^-[/tex]]/[HCl]=[13.3][7.4]/[16.9]=5.82
Thus, the The ionization constant for the given chemical equation is 5.82 .
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