To calculate the root mean square velocity and kinetic energy of F2, Cl2, and Br2 at 298K, we need to use the kinetic theory of gases.
The root mean square velocity of a gas can be calculated using the formula:
v_rms = √(3kT/m)
where k is the Boltzmann constant, T is the temperature in Kelvin, and m is the molar mass of the gas.
The kinetic energy of a gas can be calculated using the formula:
E_k = (1/2)mv_rms^2
At 298K, the root mean square velocity and kinetic energy of F2, Cl2, and Br2 can be calculated as follows:
F2:
molar mass = 2 * 18.998 g/mol = 37.996 g/mol
v_rms = √(3 * 8.314 J/mol*K * 298K / 37.996 g/mol) = √(0.0244) m/s
E_k = (1/2) * 37.996 g/mol * (0.0244 m/s)^2 = 0.0167 J/mol
Cl2:
molar mass = 2 * 35.453 g/mol = 70.906 g/mol
v_rms = √(3 * 8.314 J/mol*K * 298K / 70.906 g/mol) = √(0.0132) m/s
E_k = (1/2) * 70.906 g/mol * (0.0132 m/s)^2 = 0.0051 J/mol
Br2:
molar mass = 2 * 78.918 g/mol = 157.836 g/mol
v_rms = √(3 * 8.314 J/mol*K * 298K / 157.836 g/mol) = √(0.0064) m/s
E_k = (1/2) * 157.836 g/mol * (0.0064 m/s)^2 = 0.0016 J/mol
To rank the halogens with respect to their rate of effusion, we need to consider the root mean square velocity of each gas. The rate of effusion of a gas is directly proportional to the root mean square velocity of the gas, which is the velocity of the gas particles. Therefore, the gas with the higher root mean square velocity will effuse faster than the gas with the lower root mean square velocity.
From the above calculation, we can see that the root mean square velocity of F2 is the highest, followed by Cl2, and then Br2. Therefore, the halogens can be ranked in terms of their rate of effusion as follows:
F2
Cl2
Br2
So Fluorine(F2) will effuse faster than Chlorine(Cl2) and Bromine(Br2)
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which element forms a 3+ ion that has the electron configuration [kr]4d6 ?
The element Rhodium (Rh) has the electron configuration [Kr]4d⁶[K r] ⁴d⁶ and, as a result, forms a 3⁺ ion with that exact same name.
Rhodium, which has the chemical symbol Rh and atomic number 45, is an element. It is an extremely uncommon transition metal that is white in color, exceedingly hard, and resistant to corrosion. The platinum group metals include this precious metal. Naturally occurring 103Rh is the only isotope of this element.
Rarely does rhodium occur as a chemical compound in minerals like bowieite and rhodplumsite, but it does so frequently as a free metal or an alloy with other metals. It is extremely rare and therefore extremely expensive.
Similar to the other platinum group metals, rhodium can be mined from platinum or nickel ores. William Hyde Wollaston found it in 1803 in one of these ores and gave it the name "rose" after one of its chlorine derivatives, which is a deep pink.
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For the following reaction indicate which reactant is the lewis acid and which is the lewis base
Al^3+ + 6H2O ⇌ Al(OH)3 + 3H3O^+
a. Al^3+ is the lewis acid
b. Al^3+ is the lewis base
c. H2O is the lewis acid
d. H2O is the lewis base
e. This not a lewis acid-base reaction
Al³⁺ is really the Lewis acid, and H₂O is the Lewis base, according to the stated statement for the subsequent reaction.
What does the term "reaction" in chemistry mean?In a chemical reaction, one or more chemicals, usually known as reactants, change into same or more other compounds, frequently referred to as products. Chemical elements or bioactive substances are the building blocks of substances. In addition to additive, demolition, split, double replacements, and separation, combustion is one of the five fundamental types of chemical processes.
aceeptor of electrons and lewis acid
Lewis Base, a donor of electrons
Al³⁺ metal ion functions as Lewis acid in aqueous solution because it can take electrons.
Thus, H₂0 is indeed a Lewis Base while Al³⁺ is indeed a Lewis Acid.
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Would you expect nonpolar molecules to "stick together" more or less effectively than polar molecules?
Non-polar molecules are less effective at "sticking" than polar molecules.
Nonpolar molecules are less effective at "sticking" than polar molecules because they lack dipoles that can form positive and negative ends held together by dipole-dipole interactions. The inter-dipole interactions between these instantaneous dipoles are known as dispersion forces. These forces, also called van der Waals forces, help neutral atoms and nonpolar molecules attract each other. Polar molecules differ from non-polar molecules in that they have positive and negative ends and strong intermolecular attractive forces. Non-polar molecules are less effective at "sticking" than polar molecules.
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calculate the molarity of a solution of 0.065 grams of nacl in enough ethanol (ch3ch2oh) to give 100 ml of solution.
The molarity of the solution of 0.065 grams of NaCl in enough ethanol [tex](CH_3CH_2OH)[/tex] to give 100 ml of solution is 0.11 M.
The molarity of a solution is defined as the number of moles of solute per liter of solution. To calculate the molarity, we need to know the number of moles of solute present in the solution and the volume of the solution.
First, we need to find the number of moles of solute. We can do this by using the formula:
moles of solute = mass of solute / molar mass of solute
The molar mass of NaCl is 58.44 g/mol, so we can use this to calculate the number of moles of NaCl in 0.065 g of NaCl:
moles of NaCl = 0.065 g / 58.44 g/mol = 0.0011 mol
Next, we need to find the volume of the solution. We know that the solution has a volume of 100 ml. We will assume that the density of ethanol is close to the density of water which is 1g/ml, so we can assume that the volume of the solution is equal to the mass of the solution.
Finally, we can calculate the molarity of the solution:
molarity = moles of solute/liters of solution
molarity = 0.0011 mol / 0.1 L = 0.11 M
So the molarity of the solution is 0.11 M.
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Pennies used to be called coppers” how do you suppose they got this nicknames
The pennies contain a lot of copper thus they are called "coppers".
Why are they called coppers?The coins are used as money. They can be looked upon as metallic money. The pennies are one of the coins that we have and they are therefore a unit of money.
The pennies are composed mostly of copper. The full components of the pennies are; 95% copper and 5% tin and zin. It is thus clear that in the penny coin, the metal that has the greatest percentage is copper hence they are called "coppers".
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This formula equation is unbalanced. BaCl2(aq) Na2CO3(aq) BaCO3(s) NaCl(aq) Which coefficient should be placed in front of NaCl to balance this equation
Answer: The coefficient that should be placed in front of NaCl to balance this equation is 2.
Explanation: The balanced equation for the reaction between BaCl2(aq) and Na2CO3(aq) is :
BaCl2(aq) + Na2CO3(aq) --> BaCO3(s) + 2NaCl(aq)
In the unbalanced equation given, there is 1 mole of NaCl produced from 1 mole of BaCl2(aq) and 1 mole of Na2CO3(aq). But according to the balanced equation, 2 moles of NaCl is produced. Therefore, to balance the equation, a coefficient of 2 should be placed in front of NaCl.
The balanced equation will be: BaCl2(aq) + Na2CO3(aq) --> BaCO3(s) + 2NaCl(aq)
What type of bond describes a transfer of
electrons between atoms of opposite charges?
A. covalent bond
C. neutron bond
4
B. ionic bond
D. proton bond
Answer:
B (ionic bond)
Explanation:
Because it is! :)
ReviewI Constants Periodic Table Estimate the value of the equilibrium constant at 615 K for each of the following reactions. AGe for BrCl(g) is -1.0 kJ/mol. The standard molar entropy, Se,for BrCI(g) is 240.0 J/mol K. You may want to reference (Pages 873- 878) Section 18.10 while completing this problem. A. 2NO2(g)⇌N2O4(g). ΔH∘f for N2O4(g) is 9.16 kJ/mol.B. Br2(g)+Cl2(g)⇌2BrCl(g) .ΔH∘f for BrCl(g) is 14.6 kJ/mol.
Each of the following reactions' equilibrium constants at 615 K are (A) 4.622 * 10(-5) and (B) 5.545
What is meant by equilibrium?During a reversible chemical process, chemical equilibrium is the state in which there is no net change in the quantity of reactants or products. As "balancing" is the definition of the word "equilibrium," it follows that what a chemical process represents an equilibrium between the products and reactants involved in the reaction. a situation in which opposing forces are acting in balance or at rest. equitable distribution of all forces, effects, etc.; equal impact. emotional or mental equilibrium; equanimity: She lost it under the burden of the circumstances.
What causes equilibrium in chemistry?Chemical equilibrium is the condition of a system in which the parameters of the system remain constant over time and neither the reactant concentration nor the product concentration changes. The system enters chemical equilibrium when the forward reaction rate and the reverse reaction rate are equal.
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metallic bonding occurs between metal atoms that have____
Positively charged metal ions.
How metal bonding works?Metallic bonding is a type of chemical bonding caused by the electrostatic attraction of conduction electrons (in the form of an electron cloud of delocalized electrons) to positively charged metal ions.
As chemistry matured into a discipline, it became obvious that metals dominated the periodic table of elements, and significant progress was made in the description of the salts that may be generated in interactions with acids. With the advent of electrochemistry, it became known that metals normally enter solution as positively charged ions, and the oxidation processes of the metals in their electrochemical series were well recognized. Metals were shown as positive ions bound together by an ocean of negative electrons.
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What splitting pattern is observed in the proton NMR spectrum for the indicated hydrogens? a) triplet. b) septet. c) singlet. d) doublet. e) quartet
a) A triplet is observed in the proton NMR spectrum when three protons are chemically identical and are in a magnetic environment that is equivalent. This usually occurs when there are three protons on adjacent carbons.
b) A septet is observed in the proton NMR spectrum when seven protons are chemically identical and are in a magnetic environment that is equivalent. This usually occurs when there are seven protons on adjacent carbons.
c) A singlet is observed in the proton NMR spectrum when there is only one proton present in the molecule.
d) A doublet is observed in the proton NMR spectrum when two protons are chemically identical and are in a magnetic environment that is equivalent. This usually occurs when there are two protons on adjacent carbons.
e) A quartet is observed in the proton NMR spectrum when four protons are chemically identical and are in a magnetic environment that is equivalent. This usually occurs when there are four protons on adjacent carbons.
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write 2-3 sentences to describe and identify the type of reaction that occurs between potassium carbonate (k2co3) and nitric acid (hno3)
This type of reaction between potassium carbonate (k2co3) and nitric acid (HNO3) is Acid-base neutralization reaction.
2HNO3+K2CO3⇒ 2KNO3+H2O+CO2
Potassium carbonate is a weak base whereas Nitric acid is a very strong acid. The reaction between them neutralizes each other forming water. The weak nitric acid reacts with the strong potassium base to produce salt, water and carbon dioxide which is given off.
Molecular ratio of reactants is 2 : 1.
All phases are represented in the equation: aq for aqueous, l for liquid and g for gas (notice how they are written in subscript).
The reaction is an acid-base neutralization reaction.
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turn on show valence electrons. what do you notice at the very top of the nitrogen atom, and how does this feature explain why the molecule is polar?
At the very top of the nitrogen atom there are three dots, representing the three valence electrons of the nitrogen atom.
What is valence electrons?Valence electrons are the electrons that are present in the outermost shell of an atom. They are responsible for the chemical properties of the atom and determine how the atom will interact with other atoms in a chemical reaction. Valence electrons are important because they provide the atom with a certain degree of stability and determine its reactivity. Valence electrons are located in the outermost electron shell, so they are the most easily accessible to other atoms.
This feature explains why the molecule is polar because the three electrons create an uneven distribution of charge, giving the molecule a positive and negative end, making it polar.
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calculate the number of moles present in 25.5g of lead 2 sulphide,PBS
The number of moles present in 25.5g of Lead 2 Sulphide,PBS is 0.0839 moles.
What is moles?Moles are small, burrowing mammals that have dark fur and small eyes. They are most active during the night, and spend most of their time digging and foraging for food. Moles have powerful front feet and claws that help them to move soil and dig tunnels. They feed mostly on small insects, worms, and grubs that live in the ground. Moles can be found throughout the world, and their populations vary according to the availability of food. They are important for aerating soil, and their tunnels can provide pathways for water to travel.
Molar mass of Lead 2 Sulphide,PBS = 303.82 g/mol
Number of moles = 25.5 g/ 303.82 g/mol
= 0.0839 moles.
Therefore, the number of moles present in 25.5g of Lead 2 Sulphide,PBS is 0.0839 moles.
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How many atoms are in 1.25 moles of Oz?
Answer:
1 mole = 6.02 x 1023 atoms = 6,158.46 atoms
1 mole = 12 g
1Oz = 28.3495 g
1.25 moles = 1.25*12 = 15g
15g = 15*6,158.46 = 92,376.9 atoms
92,376.9 atoms (in g) = around 3258.49 atoms (in OZ)
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to balance a chemical equation, it is permissible to adjust the____
Coefficients and Subscripts The numbers in front of the molecule are called coefficients. Subscripts are the lower numerals that follow atoms.
What exactly are Coefficients and Subscripts?Equations for balancing. To balance a chemical equation, you cannot modify the subscripts in a chemical formula; only the coefficients can be changed. Changing the subscripts alters the atom ratios of the molecule and hence the chemical characteristics. When balancing an equation, you can only alter the coefficients (the numbers in front of molecules or atoms).
To balance a chemical equation, add coefficients to the symbols or formulae as needed so that the same number of each type of atom appears in both reactants and products.
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when naming binary covalent compounds, the element listed first will be the one that is Select the correct answer below: O more metallic O less metallic O heavier. O lighter.
The naming binary covalent compounds, the element listed first will be the one that is more metallic.
Binary covalent compound are composed of two different elements (which is usually nonmetals). For example: ClF3 It contains 1 atom of chlorine and 3 atoms of fluorine. Binary compounds follow some rules: First element in the formula is given first, using the full name of the element’s and the second element is named as if it were an anion. Prefixes are used to denote the numbers of atoms which is present. When first element exists as a single atom, the prefix mono- is omitted. For example, CO is known as carbon monoxide rather than monocarbon monoxide.
The more metallic element would be listed first in the binary covalent compound.
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it is often possible to determine mass of products without knowing the actual chemical equation for the reaction by using the concept of percent composition. for example, ammonia (nh3) can be used to synthesize hydrazine (n2h4). assuming that all the nitrogen in ammonia is converted to the nitrogen in hydrazine, how many grams of hydrazine can be produced from 19.2 g of ammonia?
11.4 g of hydrazine can be produced from 19.2 g of ammonia.
What is hydrazine?Hydrazine is a colorless, flammable chemical compound with a strong odor.
To solve this problem, you first need to calculate the percent composition of nitrogen in both ammonia and hydrazine. The percent composition of nitrogen in ammonia is 17.03%. The percent composition of nitrogen in hydrazine is 28.57%.
Next you need to calculate the amount of nitrogen in 19.2 g of ammonia. This is done by multiplying 19.2 g by the percent composition of nitrogen in ammonia, which is 17.03%. This gives you 3.26 g of nitrogen.
Now you need to calculate how much hydrazine can be produced from 3.26 g of nitrogen. This is done by dividing 3.26 g of nitrogen by the percent composition of nitrogen in hydrazine, which is 28.57%. This gives you 11.4 g of hydrazine.
Therefore, 11.4 g of hydrazine can be produced from 19.2 g of ammonia.
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30 bullet about Pierre & Marie Curie, or the creation of the Polonium and or Radium
In their laboratory in Paris, Marie and Pierre Curie were able to successfully separate radioactive radium salts from the mineral pitchblende. In 1898, the Curies' study of pitchblende led to the discovery of the elements radium and polonium.
Exists radium today?The majority of radium's functions have been replaced by those of other radioactive substances or radiation-emitting machinery. Radium is still utilized today, but, in a few different contexts, like industrial radiography.
Why was radium no longer used?Scientists and medical experts eventually understood that the ailments of these individuals were being brought on by internal contamination as from radium they swallowed. On watch and clock dials, radium was no longer utilized by the 1970s.
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When solid ammonium carbamate sublimes, it dissociates completely into ammonia and carbon dioxide according to the following equation:(NH4) (H2NCO2) (s)⇌2NH3 (g) + CO2 (g)At 25 °C, experiment shows that the total pressure of the gases in equilibrium with the solid is 0.116 atm. What is the equilibrium constant, Kp?
The equilibrium constant, Kp, for a reaction can be determined by using the equilibrium concentrations (or partial pressures) of the reactants and products.
The equation for the equilibrium constant, Kp, for the reaction is:
Kp = [tex](PNH3)^2 * PCO2 / (PH2NCO2)^2[/tex]
In this case, the pressure of the solid ammonium carbamate is zero since it sublimes, and the total pressure is given as 0.116 atm.
So the total pressure of the gases, NH3 and CO2, at equilibrium is 0.116 atm.
Since we don't know the individual pressures of each gas we can assume that the pressure of NH3 is x and the pressure of CO2 is (0.116-x) atm.
Therefore, the equilibrium constant, Kp, is equal to [tex](x)^2 * (0.116-x) / (0)^2 = x^2 * (0.116-x)[/tex]
Note that in order to calculate the exact value of Kp, the concentrations or partial pressures of each gas at equilibrium need to be known.
But since it is not provided and we don't know the individual pressures of each gas we can only find the expression for Kp.
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How many atoms are in 78.1 g Mg
which type of reaction is represented by this equation?(1) transmutation (2) combustion (3) decomposition (4) saponification
The reaction as shown in the image is called saponification.
What is a reaction?We would have to note that if we are talking about a reaction we mean the way and manner in which there could be a kind of interaction that is happening between the reactants that would lead to the formation of a product in the system.
We can see the reaction that has been shown in the image that has been attached to the answer that we have here and the reaction that is taking place there can be classified as saponification.
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Arrange the following aqueous solutions, all at 25 ∘C, in order of decreasing acidity.
Rank from most acidic to most basic. To rank items as equivalent, overlap them.
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0.0018 M KOH
pOH = 8.55
pH = 5.45
0.0023 M HCl
Most basic
Most acidic
In order from most basic to most acidic:
0.0023 M HCl
pH = 5.45 and pOH = 8.55
0.0018 M KOH
What is acidity of solution?The hydrogen ion concentration of a solution, which is a measure of its acidity, determines the solution's pH. Pure water slightly separates into ions of hydrogen and hydroxyl (OH) in equal amounts. A substance's acid content is described. A chemical called an acid reacts with specific metals to create salts by releasing hydrogen ions into the water. Acidity is measured on a pH scale. A pH value between 7 and 0 denotes increasing acidity, while a pH value between 7 and 7 denotes neutrality.
Here,
Options are
pOH = 8.55
pH= 5.45
0.0023 M HCl
0.0018 M KOH
For pOH = 8.55
use equation A
pH + 8.55 = 14
pH = 5.45
For pH = 5.45
pH = 5.45
For 0.0023 M HCl
pH = - log (Molarity)
pH = - log (0.0023)
pH = - (-2.64)
pH = 2.64
For 0.0018 M KOH
pOH = - log (Molarity)
pOH = - log (0.0018)
pOH = 2.74
pH + 2.74 = 14
pH = 11.26
From the most basic to the acidic, in order:
0.0023 M HCl
pH = 5.45 and pOH = 8.55
0.0018 M KOH
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kclo3 decomposes to kcl and o2 what mass of o2 is produced if 2.5 g of kclo3 is completley decomposed by heating? what is the mass of kcl is produced
The mass of KCl produced is equal to 0.020 mol of KCl multiplied by the molar mass of KCl (74.55 g/mol), which is 1.491 g.
What is molar mass?Molar mass is the mass of one mole of a substance, and it is expressed in grams per mole (g/mol). It is calculated by summing the relative atomic masses of all the atoms in a molecule. The molar mass of a compound can be used to calculate the amount of a substance in moles, using the formula: moles = mass (g) / molar mass (g/mol). Knowing the molar mass of a substance can be useful in many areas of chemistry, such as stoichiometry calculations and determining the mass percent composition of a compound.
When heated, 2.5 g of KClO3 completely decomposes to KCl and O2.
Since the molar mass of KClO3 is 122.55 g/mol, 2.5 g of KClO3 is equal to 0.020 mol.
Since the reaction is 2KClO3 --> 2KCl + 3O2, 0.020 mol of KClO3 produces 0.030 mol of O2.
The mass of O2 produced is therefore equal to 0.030 mol of O2 multiplied by the molar mass of O2 (32.00 g/mol), which is 0.960 g.
The mass of KCl produced is equal to 0.020 mol of KCl multiplied by the molar mass of KCl (74.55 g/mol), which is 1.491 g.
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Classify each property as intensive or extensive.boiling pointmass density temperaturevolume color length hardness
An intensive property is a physical characteristic that occurs as a substance's quantity of matter varies. While an extensive property is a change in a substance's amount of matter.
Which property qualifies as intensive?When a characteristic remains unaffected by the mass of an element or system, it is classified as intense. Density (D), pressure (P), and temperature (T) are a few characteristics of strong characteristics (r).
Real estate in intensive use: Is it Independent?The sample size utilized to test the attribute has no bearing because intense qualities are bulk independent. A sample of liquid water, for instance, has the same density whether that it's in the form of a tumbler or a cubed foot. It is a priceless asset.
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For each bond, show the direction of polarity by selecting the correct partial charges.
__ Si-S __
__ Si-Cl __
__ CI-S __
__ Ge-As __
__ Br-As __
__ Br-Ge __
The correct partial charges, where Se is partially negative and Ge is partially charged, are as follows: ∂+ Ge-Se ∂- 2. ∂+ Ge-Br - 3. Br-Se +, where is a partial noun.
What is the meaning of partial charges?A charge that is smaller than the charge on an electron, such as the charge on a quark, is referred to as a partial charge (plural: partial charges) in physics. the partial charge on a specific atom in a polar molecule brought on by variations in electronegativity When measured in elementary charge units, a partial charge has a non-integer charge value. Net atomic charge is another name for partial charge. It is symbolized by the Greek letter, often known as or +. The asymmetrical distribution of electrons in chemical bonds results in partial charges.
Why are partial charges important?An electrostatic potential around with a molecule is represented by partial atomic or point charges, and the calculation for intermolecular interactions is dominated by the Interactions between such point charges.
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Identify each definition that applies to the compound in red. Check all that apply. Upper M g (upper O upper H) subscript 2 in red plus upper H subscript 2 upper S upper O subscript 4 right arrow 2 upper H subscript 2 upper O plus upper M g upper S upper O subscript 4.
Acid-Base Reaction - This definition applies to the compound in red because it is a reaction between an acid (H2SO4) and a base (Mg(OH)2) that produces two products, H2O and MgSO4.
What is Acid-Base Reaction?An acid-base reaction is a type of chemical reaction that involves the transfer of a proton from an acid to a base, or vice versa. This type of reaction is also known as a proton-transfer reaction, and it usually results in the formation of water and a salt. Acid-base reactions are fundamental to a wide variety of processes in nature, including the metabolism of food and the regulation of pH levels in the human body.
Ionization - This definition applies to the compound in red because it involves the ionization of Mg(OH)2, which releases hydroxide ions (OH-) into solution.
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On the periodic table, rows are called ____________________and columns are called ______________. Metals are found _________, nonmetals __________, and metalloids ______________.
Answer:
rows are called period
columns are called groups
metals are found on the left of the periodic table
nonmetals are found on the right of the periodic table
metalloids are found in a zig zag line between the metal and non metal are the right of the periodic table
what are the values of A and Z? and the chemical symbol for X.
There can be emissions of radiations like gamma radiation. There can be emission of particles too like alpha particle. Therefore, A is 64, Z is 28 and X is Ni.
What is nuclear decay?Nuclear decay is process in which the radioactive element releases particles or radiations. Alpha particles is ⁴₂He. Alpha particle is nothing but helium particle.
The balanced equation for the beta decay of ⁶⁴₂₉Cu.
⁶⁴₂₉Cu [tex]\rightarrow[/tex]₂₈⁶⁴Ni + ⁰₋₁e
The atomic number, Z, refers to the number of protons inside the element as well as its identity. A refers to the mass number, that signifies the number is protons plus neutrons. The element's chemical symbol is X.
Therefore, A is 64, Z is 28 and X is Ni.
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what volume (in ml) of 0.0887 m mgcl2 solution is needed to make 275.0 ml of 0.0224 m mgcl2 solution?
69.45 ml of 0.0887 m Mgcl2 solution is needed to make 275.0 ml of 0.0224 m Mgcl2 solution
What is the solution?A combination of one or even more solutes that have been dissolved into a solvent is referred to as a solution. To create a homogenous mixture, a solute must be completely dissolve in a solvent.
V1M1 = V2M2
Where,
V1 = volume of first solution = V1
V2 = volume of second solution = 275.0 ml
M1 = molarity of first solution = 0.0887 M
M2 = molarity of second solution = 0.0224 M
On putting values we get -
V1M1 = V2M2
V1 × 0.0887 = 275.0 × 0.0224
V1 = 6.16 / 0.0887
V1 = 69.45 ml
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PLEASE HELP! There is a image below.
Answer:Our formula for percent composition is:
Molar mass of element
----------------------------------- x 100
Molar mass of compound
So, lets find the molar mass of the compound as a whole before we begin. We do this by adding atomic masses from the periodic table.
Ca: 40.078
S: 32.065
O4: 63.996 (15.999 x 4)
To find our total mass, all we need to do is add those numbers together! Our molar mass of CaSO4 is 136.139 g/mol.
Now, lets use those individual masses and our total mass in the equation to find the percent composition of each element.
Ca: 40.078
---------- equals .294, and when we multiply that by 100 we get 29.44%
136.139
The percent composition of calcium in CaSO4 is 29.44%.
S: 32.065
------------- equals .235, and when we multiply that by 100 we get 23.55%
136.139
The percent composition of S in CaSO4 is 23.55%.
O4: 63.996
------------- equals .470, and when we multiply that by 100 we get 47.0%
136.139
The percent composition of O4 in CaSO4 is 47%.
Hope this helps!
