The conversion of units is a process of changing one unit to another, while preserving the same value.
The conversion of units2.62e-7 lb/ft^3 (3 sig figs)
To convert 53.7 μg/mL to lb/ft^3, we will use the conversion factor of 1 lb/ft^3 = 16,018,000 μg/mL.To begin, we will multiply 53.7 μg/mL by the conversion factor of 16,018,000 μg/mL.53.7 μg/mL * 16,018,000 μg/mL = 860,686,600 μg/mLNext, we will divide the result by 16,018,000 μg/mL to get the answer in lb/ft^3.860,686,600 μg/mL ÷ 16,018,000 μg/mL = 53.7 lb/ft^3Therefore, 53.7 μg/mL is equal to 53.7 lb/ft^3. The units of the answer are lb/ft^3 and the answer is rounded to two significant figures.The conversion from micrograms per milliliter (μg/mL) to pounds per cubic foot (lb/ft^3) is not a direct conversion, since they measure different units. To convert from one to the other, we must first convert the given mass of 53.7 μg/mL to pounds.To do this, we can use the conversion of 1 lb = 453,592 μg. This means that 53.7 μg/mL is equivalent to 0.0001185 lb.Next, we must convert from pounds to pounds per cubic foot. To do this, we can use the conversion of 1 lb/ft^3 = 16.02 lb. This means that 0.0001185 lb is equivalent to 0.000743 lb/ft^3.Therefore, the conversion of 53.7 μg/mL to lb/ft^3 is 0.000743 lb/ft^3. This answer should be reported with three significant figures, as the given value of 53.7 μg/mL has three significant figures.To learn more about The conversion of units refer to:
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Give the IUPAC name of the following molecule:
The name of the molecule using IUPAC Organic rules is 2-Methyl-benzen-1-ol.
Is benzene very poisonous?
Because of the way that benzene makes the body's cells behave, poisoning can be fatal. The bone marrow cells' ability to make red blood cells can be affected by exposure to benzene, as can the immune system's white blood cells.
Is benzene illegal in the US?
Toys and other items meant for use in the household are no longer allowed to contain benzene as an ingredient. Benzene smells pleasant, fragrant, and similar to gasoline. Most people can smell benzene in the air between 1.5 and 4.7 ppm.
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Which of the following best helps explain why the pressure of a sample of CH4(g) (molar mass 16g/mol) is closer to the pressure predicted by the ideal gas law than a sample of NH3(g)(molar mass 17g/mol) ?
Because they are more attracted to one another due to their polar nature, NH3 molecules crash with the container walls with less force than CH4 molecules.
Methane, or CH4, is the non-polar chemical.
The covalent bond holds the CH4 molecules together. The substance is referred to as a covalent compound. Sharing an electron pair results in the formation of the covalent molecule. A polar compound is NH3. The polar covalent link is the NH3, a covalent bond with a net dipole moment.
As a result, while CH4 molecules lack polarity, NH3 molecules do.
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The gases in a hair spray can are at a temperature of 27OC and a pressure of 30 lbs/in2. If the gases in the can reach a pressure of 90 lbs/in2, the can will explode. To what temperature in kelvin must the gases be raised in order for the can to explode? Assume constant volume. (1 sig fig for answer)
50 points
estimate the number of atoms in your body. (hint: based on what you know about biology and chemistry, what are the most common types of atom in your body? what is the mass of each type of atom? appendix d gives the atomic masses of different elements, measured in atomic mass units; you can find the value of an atomic mass unit, or 1 u, in appendix e.)
It is difficult to estimate the exact number of atoms in a human body because number can vary greatly depending on a person's size and body composition. However, we can make an estimate based on the average mass of the human body and average atomic masses of the most common elements in the body.
The most common elements in the human body are oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. These elements make up approximately 99% of the total body mass.
Using the average atomic masses of these elements and assuming a body mass of 70 kg, we can estimate the number of atoms as follows:
Oxygen: approximately 25 kg, or 3.5 × 10⁻²⁶ atoms.
Carbon: approximately 18 kg, or 2.5 × 10⁻²⁶ atoms.
Hydrogen: approximately 10 kg, or 1.4 × 10⁻²⁶ atoms.
Nitrogen: approximately 3 kg, or 4.2 × 10⁻²⁵ atoms.
Calcium: approximately 1.5 kg, or 2.1 × 10⁻²⁵ atoms.
Phosphorus: approximately 0.8 kg, or 1.1 × 10⁻²⁵ atoms.
So, the total number of atoms in a 70 kg human body would be approximately 10⁻²⁷ to 10⁻²⁸ atoms.
The exact number of atoms in a human body can vary greatly depending on a number of factors, including age, body composition, and overall health.
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Please answer my question.
Ionization energy is the amount of energy required to release an electron from the outermost valence shell. Ca thus has a higher second ionization potential than K.
What is ionisation energy?Ionization energy is the amount of energy required to release an electron from the outermost valence shell of the atom or molecule which is loosely bound to the nucleus. Ionization energy is used to arrange the elements in the periodic table. All this is happening when an atom or molecule is in a gaseous state.
As we descend, the group size grows and the nuclear charge on the electrons becomes less effective. Ionization potential falls off in the group as a result. Ca thus has a higher second ionization potential than K.
Therefore, Ca thus has a higher second ionization potential than K.
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Which of the following sources does not contribute to ozone depletion?
A. Propellants with chlorofluorocarbons
B. Halons used in fire protection
C. Methyl Chloroform in cleaning agents
D. Nitrates used in crop fertilizers
Option (d) is correct. Nitrates used in crop fertilizers does not contribute to ozone depletion.
The Ozone depletion can be defined as the gradual thinning of ozone layer of the earth in the upper atmosphere caused by the release of chemical compounds containing gaseous chlorine or bromine from industry and other human activities. Ozone layer depletion is a major environmental problem because it increases the amount of ultraviolet radiation that reaches the surface of the earth which increases the rate of skin cancer, eye cataracts and immune system damage. The Ozone depleting substances are chlorofluorocarbons (CFCs), halon, carbon tetrachloride (CCl4), methyl chloroform (CH3CCl3), hydrochlorofluorocarbons (HCFCs), methyl bromide (CH3Br), bromochloromethane (CH2BrCl).
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Two chemical substances A and B can be touched easily by hands kept on seperate tube but when both the substances are mined in a test tube it cannot be touched due to hotness. What can be reason. behind this?
Answer:
The reason for this is likely an exothermic reaction, where the combination of substances A and B results in a release of heat energy.
Explanation:
An exothermic reaction is a chemical reaction that releases heat energy. This heat can cause an increase in temperature, sometimes to a point where it becomes uncomfortable or even dangerous to touch the mixture. The exact reason why the mixture becomes hot depends on the chemical nature of substances A and B and the reaction they undergo when mixed. Some possible causes could include an increase in the rate of molecular motion as the reaction progresses, or the breaking and formation of chemical bonds, which releases energy in the form of heat. Additionally, the reaction could be releasing gases that are expanding and generating heat as a result. To determine the exact cause, a detailed analysis of the chemical composition and reaction kinetics of the mixture would be required.
Perform each conversion from one metric unit of volume to another.
8.23 mL to dL =
0.0647 cL to nL =
According to unit conversion, conversion of metric units is 8.23 ml= 0.0823 dl and 0.0647 cl= 0.064×10⁷ nl.
What is unit conversion?Unit conversion is defined as a multi-step process which involves multiplication or a division operation by a numerical factor.The process of unit conversion requires selection of appropriate number of significant figures and the rounding off procedure.
It involves a conversion factor which is an expression for expressing the relationship between the two units.A conversion ratio always has value which equals to one which indicates that numerator and denominator have values which are expressed in different units.
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19. How do you compare the flexibility of the bioplastic at room temperature and refrigerator temperature?
The bioplastics at room temperature have better flexibility than they have at the refrigerator temperature. The chain mobility of the polymer reduces at lower temperature.
What are bioplastics?Bioplastics are biodegradable polymers. The sugar found in plants is converted into plastic to create bioplastics. In the US, corn is the source of that sugar.
Because of this, bioplastics are more environmentally friendly and renewable than traditional plastics. Currently, a substantial amount of bioplastics are manufactured in two different forms.
They are referred to as polyhydroxyalkanoate (PHA) and polylactide acid (PLA) (PHA). Blair, Nebraska-based Nature Works is the largest PLA manufacturer. These polymer chains are flexible at room temperature however, the chain mobility gets hindered at very lower temperature and their flexibility decreases.
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The average radius of a molecule of lysozyme, an enzyme in tears, is 1.430 × 10-3 μm. What is its
radius in decimeters (dm)? (Enter your answer in scientific notation.)
1.4
X 106
dm
An enzyme found in tears called lysozyme has an average radius of 1.430 × 10⁻³ μm OR 1.43 E⁻⁸ decimeters (dm). is the radius in decimeters (dm).
What use does lysozyme serve?Animals generate the antibacterial enzyme lysozyme, which is a component of the innate immune system. A glycoside hydrolase is responsible for catalyzing the reaction.
What is the lysozyme's molecular weight?Lysozyme has a molar mass of 14,100 units. Its three-dimensional structure resembles that of immune system, -lactalbumin, and Lysozyme, an enzyme that can disintegrate some bacteria's exterior layer and which is also found in saliva and tears, is secreted by skin glands along with bacteria and skin.
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Without doing any calculations, predict the sign of the entropy change for each of the four processes.
NaCl(s)=NaCl(aq)
Choose one:
ΔSsys > 0
ΔSsys = 0
ΔSsys < 0
The process's entropy change has the sign ΔSsys > 0
What is Second Law of Thermodynamics?The entropy of an isolated system never decreases, according to the Second Law of Thermodynamics.
This means that for a process to be spontaneous, the entropy of the system must increase.
This is the theory used in this question to predict the sign of the entropy change for the dissolution process.
In the given question ,
This is an example of a dissolution process, which is an endothermic process because energy is required to break the strong ionic bonds of the solid.
Therefore, the entropy of the system increases as the molecules become more disordered, leading to a positive entropy change, ΔSsys > 0.
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LiCl +Br2=LiBr+Cl2
How much LiBr is produce In grams if you had 40.0 grams of Br2
Answer:
80.0 grams of LiBr
Explanation:
The balanced chemical equation for the reaction is:
2 LiCl + Br2 -> 2 LiBr + Cl2
Since the ratio of Br2 to LiBr is 1:2, for every 1 gram of Br2 that reacts, 2 grams of LiBr will be produced.
Therefore, if you had 40.0 grams of Br2, you would produce 2 x 40.0 = 80.0 grams of LiBr.
please draw a curved arrow mechanism to show the conversion of the following acid chloride to the carboxylic acid.
The mechanism for the conversion of an acid chloride to a carboxylic acid is a nucleophilic acyl substitution reaction. In this reaction, a nucleophile, typically a hydroxide ion or an alcohol, attacks the electrophilic carbon of the acid chloride, resulting in the displacement of the chloride leaving group. The curved arrow in the reaction is used to show the movement of electrons during the reaction.
In the reaction below, a hydroxide ion attacks the electrophilic carbon of the acid chloride, resulting in the formation of the carboxylic acid. The curved arrow shows the movement of the electrons during the reaction.
H O \ / \ / C==Cl | OH
Curved Arrow [1]:
H O \ / \ / C<=Cl | OH
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What is part per million
write a balanced half-reaction for the oxidation of gaseous arsine to aqueous arsenic acid in acidic aqueous solution. be sure to add physical state symbols where appropriate.
The balanced half-reaction for the oxidation of gaseous arsine (AsH3) to aqueous arsenic acid (H3AsO4) in acidic aqueous solution is:
AsH3 (g) + 4H2O (l) → H3AsO4 (aq) + 8H+ (aq) + 8e-The following can be considered the first, second, and third steps of this reaction:(1) The reaction of arsine with water:
AsH3 (g) + 4H2O (l) → H3AsO4 (aq)(2) Balancing the oxygen using hydrogen ions:
AsH3 (g) + 4H2O (l) → H3AsO4 (aq) + 8H+ (aq)(3) Accounting for the number of electrons transferred in the redox reaction:
AsH3 (g) + 4H2O (l) → H3AsO4 (aq) + 8H+ (aq) + 8e-In this reaction, the gaseous arsine (AsH3) acts as the reducing agent, while the water molecules (H2O) and hydrogen ions (H+) in the acidic solution provide the electrons (e-) and protons required for the oxidation to occur. The reaction results in the production of aqueous arsenic acid and hydrogen ions.
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a. write a system of equations that shelby and calvin could use to determine how many milliliters they need to pour from each beaker to make their solution. let a be the amount, in milliliters, of solution from beaker a, and let b be the amount, in milliliters, of solution from beaker b.
To determine how many milliliters Shelby and Calvin need to pour from each beaker to make their solution, they can set up a system of equations as follows:
Let a be the amount, in milliliters, of solution from beaker a, and let b be the amount, in milliliters, of solution from beaker b.
Equation 1: a + b = 5 (This equation states that the total amount of solution poured should equal 5 milliliters)Equation 2: 0.65a + 0.35b = 5 (This equation states that the total amount of acid should equal 5 milliliters, since the solution is 65% acid and 35% water)Solving this system of equations, we get: a = 3.5 milliliters and b = 1.5 milliliters. Therefore, Shelby and Calvin need to pour 3.5 milliliters of solution from beaker a and 1.5 milliliters of solution from beaker b to make their solution.
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select all the statements that correctly describe the effect of more electronegative atoms on acidity.multiple select question.the acidity of an acid h-a increases if there are more electronegative atoms attached to element a.in an acid h-a, electronegative atoms attached to a destabilize the conjugate base by withdrawing electron density.in an acid h-a, electronegative atoms attached to a stabilize the conjugate base through the inductive effect.the acidity of an acid h-a decreases if there are more electronegative atoms attached to element a.
The acidity of an acid H-A will increases if there are more electronegative atoms attached to element A. In an acid H-A, the electronegative atoms attached to A stabilize the conjugate base by induction.
An acid is a chemical that gives off hydrogen ions in water and it forms salts by combining with certain metals. Acidity is measured on a scale known as the pH scale. On this scale, a pH value of 7 will be neutral, and a pH value of less than 7 to 0 shows increases acidity.
When an acid will dissociates into its ions in water, it loses a hydrogen ion. The species which is formed is the acid's conjugate base. Conjugate base is the base member, X-, of a pair of the compounds that transform into each other by gaining or losing a proton.
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--The given question is incorrect, the correct question is
"Describe the effect of the presence of more electronegative atoms on acidity?"--
You find the following reaction at equilibrium. What will happen if you remove some of the solid AgCl?
Ag+ (aq) + Cl- (aq) ⇌ AgCl (s)
If we remove some solid silver chloride the equilibrium will react to decrease the concentration of silver cation.
According to Le Chatelier's Principle, the system at equilibrium will react to a stress placed on the position of the equilibrium in such a way as to minimize this stress. The position of the equilibrium will shift in response to a stress placed on either the reactant or the product side.
Ag+ (aq.) + Cl- (aq.) ⇌ AgCl (s)
Equilibrium is a state of balance between opposing forces or actions that is either static or dynamic. If we remove the salt it will cause the concentration of aqueous silver cations to increase. This will place a stress on the position of the solubility equilibrium. Then the equilibrium will react in such a way as to decrease the concentration of silver cations. We have to shift to the left since the reverse reaction.
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i need help on this question look at attachment
The new volume in the graduated cylinder if 14g of iron and 14g of lead is added is 148.37 mL.
How to calculate volume?Volume is a three-dimensional measure of space that comprises a length, a width and a height.
It is measured in units of cubic centimeters in metric, cubic inches or cubic feet in English measurement.
According to this question, a graduated cylinder contains 145mL of water. A 14.0g of iron and 18.0g of lead was added.
volume of iron = 14.0g ÷ 7.86g/cm³ = 1.78cm³volume of lead = 18.0g ÷ 11.3g/cm³ = 1.59cm³This means that the volume of the water in the graduated cylinder will be 145 + 1.59 + 1.78 = 148.37 mL
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How many significant figures are in 1,266.9-4,633.1
The number of significant figures in the result of exponentiation depends on the number of significant figures in the base. In this case, 1,266.9 has 4 significant figures, so the answer will have 4 significant figures as well.
What is a Significant Figure?In positional notation, significant figures are the digits in a number that are trustworthy and required to denote the amount of something.
It is unclear whether you meant the figure to carry an exponential, but even it were a subtraction sign, the significant figures in the number is four.
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Suppose a sulfur-32-nuclide transforms into a phosphorus -32- nuclide by absorbing a neutron and emitting a proton.
Complete the nuclear chemical equation below so that it describes this nuclear reaction.
? =32/15 P+1/1H
The nuclear chemical equation that describes this nuclear reaction is 32S + 1n --> 32P + 1H.
In nuclear physics, the transformation of a sulfur-32-nuclide into a phosphorus-32-nuclide is a type of nuclear reaction, also known as beta decay. This reaction occurs when a neutron is absorbed by the sulfur-32 atom, causing it to become unstable and emit a proton.
This results in a phosphorus-32 atom, which is a more stable isotope. The resulting reaction can be described by the nuclear chemical equation: 32S + 1n --> 32P + 1H, where 32S represents the sulfur-32 atom, 1n represents the absorbed neutron, 32P represents the resulting phosphorus-32 atom, and 1H represents the emitted proton. This reaction helps demonstrate the principles of nuclear stability and the underlying mechanics of beta decay.
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Which of the following should have the greatest molar entropy at 298 K?a. CH4(g)b. H2O(l)c. N2O4(g)d. H2(g)e. NaCl(s)
N2O4(g) should have the greatest molar entropy at 298 K. So option C is correct
The molar entropy is a measure of the amount of thermal energy in a substance that is unavailable for doing useful work. It is related to the number of available energy states, or microstates, that a substance can occupy.
At a given temperature, N2O4(g) has more microstates available compared to CH4(g), H2O(l), H2(g), and NaCl(s) due to its molecular complexity and a high degree of molecular motion.
This results in N2O4(g) having a higher molar entropy at 298 K compared to the other substances.
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the subshell from which an electron would have to be removed to make a cation, and the subshell to which an electron would have to be added to make a anion. helium
The subshell from which an electron would have to be removed to make a cation, and the subshell to which an electron would have to be added to make a anion is the electrons removed in the outermost p orbital to form cations, and the addition of outer shell electrons in group 17 forms anions.
Ionization energy is the energy required to remove the weakest bonded electron by an atom or ion in the gaseous state. The size of the ionization energy is strongly influenced by the distance from the nucleus to the electrons in the outer shell (atomic radius) and the core charge.
Cations are atoms that have lost one or more electrons. The subshell from which electrons must be removed to make cations is the outermost p orbital and then the s orbital. Losing a negatively charged electron will make the atom that was initially neutral become positively charged. While the subshell that gains electrons is called anion. The addition of electrons to the outermost subshell of the atom will give it a negative charge. Group 17 elements add one outer shell electron to form an anion.
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Part B While in Europe, if you drive 101 km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 22.0 mi/gal ? Assume that 1 euro = 1.26 dollars. Express your answer numerically in dollars. ►View Available Hint(s) 195| ΑΣΦ Submit w ? dollars
Answer: 104.85 Dollars
Explanation: You are given 101km/day and are trying to convert to Dollars/weeks which can be done with simple stoichiometry.
[tex]\frac{101 km}{1 day} * \frac{7 days}{1 week} * \frac{1 mile}{1.61 km} *\frac{1 gal}{22 miles} * \frac{3.79liters}{1gal}*\frac{1.1Euros}{1liter}*\frac{1.26Dollars}{1Euro}[/tex]
You can cancel all the units besides Dollars and weeks as the rest appear in the numberator and demonimator.Multiply everything out and you get a final answer of 104.85 Dollars per weekGuys I need help ASAPPPP it’s due in 1hour!!!! HELPPPPP
1. I personally prefer to use figure 2 as the easier one to understand, because with such a presentation we can see the difference in each item, it can be seen from the high and low of the chart.
2. To get data in the form of a number of things, it is more efficient to use diagram in figure 1 data.
About diagramA diagram is a two-dimensional visualization which is a representation of data. A diagram that represents or values in an organized manner. Diagrams are usually simple pictures that use lines and symbols to represent data.
Various types of diagrams are simplified and structured visual representations of concepts, ideas, constructs, relationships, statistical data, anatomy, and more. Diagrams can be used for any aspect of human activity to explain or illustrate a topic.
Complex data is usually easier to understand with visual aids. Sometimes, this technique uses three-dimensional visualization which is then projected onto a two-dimensional surface.
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You discover that the head of a match contains 1.6x1024 atoms of sulfur S. How many moles of S does a match contain? (Show work please)
The number of mole of sulphur, S the match contain is 2.66 moles
How do I determine the number of mole of S?Avogadro's hypothesis gives a well defined relationship between number of mole and number of atoms. This is given below:
6.02×10²³ atoms = 1 mole of substance
With above information, we can obtain the number of mole is sulphur, S present in the 1.6×10²⁴ atoms of sulphur. Details below:
From Avogadro's hypothesis,
6.02×10²³ atoms = 1 mole of sulphur
Therefore,
1.6×10²⁴ atoms = (1.6×10²⁴ atoms × 1 mole) / 6.02×10²³ atoms
1.6×10²⁴ atoms = 2.66 moles of sulphur
Thus, we can conclude from the above calculation that the number of mole is 2.66 moles
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Small pieces of broken rock, sand, and shells are called _______________.
a. Dirt
b. Sediment
c. Dust
d. Sedimentary Rock
Answer:
b- sediment
Explanation:
the remains of plants and animals are known as sediments. It can be as small as a grain of sand or as large as a boulder. Sediment moves from one place to another through the process of erosion.
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3. Describe one way to correlate similar rock
layers.
Answer:Index fossils are commonly used to match rock layers in different places (Figure below). If two rock layers have the same index fossils, then they're probably about the same age. Using Index Fossils to Match Rock Layers. Rock layers with the same index fossils must have formed at about the same time.
Explanation: bc
A sample of an unknown liquid has a mass of 15.19 g, and a volume of 4.69 mL.
What is the density of this liquid?
density = _____ g/cm³
When a sample of an unknown liquid has a mass of 15.19 g and a volume of 4.69 mL, the density of this liquid is 3.238 g/ml.
What is density?Density is the mass of a material substance per unit volume. Density is defined as d = M/V, where d represents density, M is mass, and V is volume. Density is generally measured in grams per cubic centimetre. The density of something describes how compact or dense it is. Let's say you have two boxes, one huge and one tiny. They both, however, weigh the same. That suggests the small box is denser than the large box. The density of something also indicates how dense or packed it is. The density of a volume is the amount of substance contained inside it. A dense thing is heavier than a less dense object of the same size. An item with a density less than that of water will float atop it;
Here,
mass=15.19 gram
volume=4.69 ml
density=15.19/4.69
=3.238 gram/ml
The density of this liquid when sample of an unknown liquid has a mass of 15.19 g, and a volume of 4.69 mL is 3.238 g/ml.
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Is the Answer correct if not put actual answer and explain why.
The formula for calcium bromide monohydrate is CaBr2•H2O.
What is formula?A formula is a concise way of expressing a relationship between different variables. It is a mathematical expression that uses symbols and/or numbers to represent different quantities. Formulas can be used to calculate a wide variety of things, from the area of a circle to the amount of force needed to lift a certain weight.
The "•" symbol indicates that the compound contains one water molecule for every two calcium bromide molecules. The "H2O" part of the formula indicates that the compound contains two hydrogen atoms and one oxygen atom.
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