The two naturally occuring isotopes of chlorine are 35cl and 37cl. based on the average atomic mass of cl (35.5 amu), what is the approximate natural abundance of 35cl?

Answers

Answer 1

average atomic mass is the weighted average atomic mass of the isotopes relative to their natural abundance
following formula can be used for average atomic mass of Cl
average atomic mass of Cl -( % of 35-Cl x 35 amu )+ (% of 37-Cl x 37 amu)
assuming percentage abundance of 35-Cl to be x and percentage abundance of 37-Cl is then (100-x)
average atomic mass of Cl - (35 * x%) + (37 x (100-x)%)
35.5 = 0.35x + 37 - 0.37x
0.02x = 1.5
x = 75%
therefore relative abundance of 35-Cl is 75%

Related Questions

Polymerization is the process of linking smaller molecules to form long chains of higher molecular weight. True or False

Answers

True is correct answer.

Polymerization is the process of linking it has a smaller molecules to form has a long chains of higher molecular weight.

Hope it helped you.

-Charlie

Answer:

True

Explanation:

Polymer is made up of monomers. Monomers are the building block of polymers.

For example, formation of polyethylene from ethylene

H₂C=CH₂ + H₂C=CH₂ → - CH₂-CH₂-CH₂-CH₂-

Ethylene molecules add to one another through addition reaction.

What is the ratio of carbon atoms to hydrogen atoms in a saturated cyclic hydrocarbon?

Answers

Thy answer tis
1:2

ahh but why you may ask?
because there's 1 carbon bonded with 2 hydrogens.
the simplest answer,
because chemistry.

Explanation:

A saturated hydrocarbon is defined as the hydrocarbon in which there are only single bonds between the combining atoms.

On the other hand, a cyclic hydrocarbon is a ring structure in which hydrogen and carbon atoms are joined together.

Hence, a saturated cyclic hydrocarbon is a ring structure of hydrogen and carbon atoms joined together through single bonds only.

In a saturated cyclic hydrocarbon molecule, each carbon atom is bonded with two hydrogen atoms.

Therefore, we can conclude that the ratio of carbon atoms to hydrogen atoms in a saturated cyclic hydrocarbon is 1:2.

Which two pieces of data indicate that Jupiter resides in the outer region of the solar system?
It is primarily composed of hydrogen and helium.
It contains one natural satellite, the Moon.
It is the hottest planet in the solar system.
Its surface gases form into colorful bands.
It has a metal surface upon which one can stand.

Answers

Answer: The correct statements are it is primarily composed of hydrogen and helium and its surface gases form into colorful bands.

Explanation:

There re two types of planets in Our solar system:

1. Inner planets: There are 4 inner planets which are Mercury, Venus, Earth and Mars. These planets have a rocky surface. They revolve in less time around the Sun. The number of satellites that these planets have are less (at max two). As, these planets lie close to Sun, thus they are hotter than the outer ones.

2. Outer planets: There are 4 inner planets which are Jupiter, Saturn, Uranus and Neptune. These planets have a gaseous surface. They take more time to revolve around the Sun. These planets have many satellites. As, these planets lie far from the Sun, thus they are colder than the inner ones.

Jupiter is the 5th planet in Our solar system. The atmosphere of Jupiter is the mostly made up of Hydrogen and Helium with trace amounts of ammonia, water, methane and other carbon compounds. The clouds of ammonia present in Jupiter's atmosphere are carried by the jet streams. This results in the formation of Jupiter's colored bands, which are shades of white, red, orange, brown and yellow.

Hence, the correct statements are it is primarily composed of hydrogen and helium and its surface gases form into colorful bands.

The two pieces of data indicate that Jupiter resides in the outer region of the solar system is A. It is primarily composed of hydrogen and helium and D. Its surface gases form into colorful bands.

Jupiter's composition of hydrogen and helium, and its colorful bands indicate that it resides in the outer region of the solar system.

These features differentiate it from the rocky planets in the inner solar system.

To determine which two pieces of data indicate that Jupiter resides in the outer region of the solar system, the correct options are:

It is primarily composed of hydrogen and helium.Its surface gases form into colorful bands.These features, especially being composed of hydrogen and helium, are characteristic of the gas giants in the outer solar system.

Additionally, Jupiter's colorful bands are a result of its atmospheric conditions, which are different from the rocky surfaces of inner planets.

Correct question is: Which two pieces of data indicate that Jupiter resides in the outer region of the solar system?
A. It is primarily composed of hydrogen and helium.
B. t contains one natural satellite, the Moon.
C. It is the hottest planet in the solar system.
D. Its surface gases form into colorful bands.
E. It has a metal surface upon which one can stand.

sphingomyelin contains a fatty acid linked by an ________ bond and phosphocholine linked via the c-3 hydroxyl group of sphingosine.

Answers

the answer is amide

your welcome

A student conducted an experiment and was interested in the mass of the product of the chemical reaction. some results are shown above. what is the mass of the nacl?

Answers

NOTE: Above question is incomplete. Complete question is attached as an image file along with this question.
..............................................................................................................................

The reaction involved in present question is:

NaHCO3(s) + HCl(aq) → NaCl(s) + CO2(g) + H2O(g)

From the above reaction, it can be seen that sodium bicarbonate on reacting with HCl gets converted into NaCl (s), CO2(g) and H2O(g).

CO2(g) and H2O(g) being gas will be lost from evaporating disk and watch glass, therefore there will be lost in mass.

Thus mass let in evaporating disk and watch glass will be only due to NaCl,
= 44.45 - 42.70 = 1.75 g

The correct answer is option B

Calculate the final pressure inside a scuba tank after it cools from 100c to 25.0c. The initial pressure in the tank is 130.0 atm

Answers

Seeing that we use pressure and temperature the first thing to do is convert Celsius to Kelvin. Then we plug the pressure and temperature into the formula p1/t1=p2/t2. We then use algebra to find the new pressure to be 103.860

The final pressure inside a scuba tank after cooling from 100 °C to 25.0 °C and an initial pressure of 130.0 atm is 103.82 atm.

Given:
Initial temperature, T1 = 100 °C = 373 K
Final temperature, T2 = 25.0 °C = 298 K
Initial pressure, P1 = 130.0 atm

Using the Combined Gas Law:
P1V1/T1 = P2V2/T2
130.0 atm x V1 / 373 K = P2 x V1 / 298 K

Calculating:
130.0 atm / 373 K = P2 / 298 K
P2 = (130.0 atm x 298 K) / 373 K
P2 = 103.82 atm

Therefore, the final pressure inside the scuba tank after cooling to 25.0 °C is 103.82 atm.

How many grams of sodium chloride are required to prepare 500.0 ml of a 0.100 m solution?
a.1.46 g strike reset
b.2.93 g strike reset
c.29.3 g strike reset
d.58.5 g strike reset?

Answers

molarity is the number of moles of solute in 1 L solution.
molarity of solution to be prepared is 0.100 M
volume of solution to be prepared is 500.0 mL
the number of moles in 1 L - 0.100 mol
therefore number of moles in 500.0 mL - 0.100 mol/L x 500.0 x 10⁻³ L = 0.0500 mol
mass of NaCl required - 0.0500 mol x 58.5 g/mol = 2.925 g
mass of NaCl needed is therefore 2.93 g
answer is B. 2.93 g

In order to prepare 500.0 mL of a 0.100 M NaCl solution, 2.93 g of sodium chloride are required (Option b).

What is molarity?

Molarity is the number of moles of solute per liters of solution.

We have 500.0 mL of a 0.100 M NaCl solution. First, we will calculate the moles of solute using the definition of molarity.

M = moles solute / liters solution

moles solute = M × liters solution

moles solute = 0.100 mol/L × 0.5000 L = 0.0500 mol

Next, we will convert 0.0500 moles of NaCl to grams using its molar mass.

0.0500 mol × 58.5 g/mol = 2.93 g

In order to prepare 500.0 mL of a 0.100 M NaCl solution, 2.93 g of sodium chloride are required (Option b).

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What is studied in the field of thermodynamics?

A. The properties of chemical solutions
B. The laws of gravitational motion
C. The particle nature of light waves
D. The movement of energy and heat

Answers

The relations between heat and other forms of energy.

Thermodynamics is the study of the movement of energy and heat. Therefore, the correct option is option D.

What is thermodynamics?

The science of thermodynamics examines how heat, work, temperature, or energy are related. The general topic of thermodynamics is the movement of energy through one location or form to another.

Before around 1798, when British military engineer Count Rumford discovered that endless quantities of heat could be produced while boring cannon barrels as well as that the amount of heat produced is proportional towards the work done while having to turn a blunt boring tool, heat was not formally understood to be a type of energy. Thermodynamics is the study of the movement of energy and heat.

Therefore, the correct option is option D.

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What is the formula of the ion formed when sodium achieves a stable electron configuration?

Answers

Sodium is a group 1 element, so it forms a cation with a +1 charge by losing one electron, so it will become Na+

What are the costs and benefits of using solar energy

Answers

Advantages
Solar energy is a clean and renewable energy source.Once a solar panel is installed, solar energy can be produced free of charge.Solar energy will last forever whereas it is estimated that the world’s oil reserves will last for 30 to 40 years.Solar energy causes no pollution.Solar cells make absolutely no noise at all. On the other hand, the giant machines utilized for pumping oil are extremely noisy and therefore very impractical.Very little maintenance is needed to keep solar cells running. There are no moving parts in a solar cell which makes it impossible to really damage them.In the long term, there can be a high return on investment due to the amount of free energy a solar panel can produce, it is estimated that the average household will see 50% of their energy coming in from solar panels.

Disadvantages
Solar panels can be expensive to install resulting in a time-lag of many years for savings on energy bills to match initial investments.Electricity generation depends entirely on a countries exposure to sunlight; this could be limited by a countries climate.Solar power stations do not match the power output of similar sized conventional power stations; they can also be very expensive to build.Solar power is used to charge batteries so that solar powered devices can be used at night. The batteries can often be large and heavy, taking up space and needing to be replaced from time to time.

Solar energy offers environmental benefits, reduces electricity bills, and creates jobs, but comes with high initial costs and requires sunlight consistency. Technological improvements may decrease costs over time, but solar still requires subsidies to compete with conventional energies. Storage technology is critical for solar's future reliability and cost-effectiveness.

Solar energy is a renewable energy source with numerous benefits, such as the fact that it does not produce pollution and can reduce electricity bills over time. However, the initial cost of solar panels, installation, and maintenance can be quite high, and it requires a consistent supply of sunlight to be effective.

Technological advances are making solar energy more cost-effective, but it is still more expensive compared to fossil fuel-generated power in many regions. Moreover, despite the abundance of solar energy, the technology to store it, such as batteries, requires further development to make solar energy a more reliable source.

The necessity for a consistent supply of sunlight means that solar energy systems may still need conventional backup systems, adding to the overall cost. Nonetheless, solar panels offer the advantage of working during power grid outages, and solar energy can create jobs and positively impact economies. Over time, thanks to technological progress and economies of scale, solar energy is becoming more affordable and competitive with conventional energy sources.

The debate around subsidies stems from the high cost of solar energy, as even with government incentives, solar power is not yet as economical as fossil fuels in certain countries. However, many proponents argue that these subsidies are required to foster the development of renewable energy systems for a sustainable future.

What is the volume occupied by .355 mole of nitrogen gas at stp?

Answers

Suppose Nitrogen Gas is acting Ideally, then According to Ideal Gas Equation, Pressure, Volume, moles and Temperature are related to each other as,

P V = n R T

Solving equation for V,

V = n R T / P ------- (1)
Data Given;
Volume to find = V = ?

Standard Pressure = P = 1 atm

Standard Temperature = T = 273 K

Moles Given = n = 0.355 mol

Putting values in eq.1,

V = (0.355 mol × 0.0821 atm.L.mol⁻¹.K⁻¹ × 273 K) ÷ 1 atm

V = 7.95 L

The maximum number of electrons in a p sub-level is:

Answers

a p sub- level has 3 sub levels so it contains 6 electrons max

Answer:

The maximum number of electrons in a p sub-level is 6.

Explanation:

The Electronic Configuration of the elements is the arrangement of all electrons of an element in energy levels and sub-levels (orbitals).

There are 7 energy levels, numbered from 1 to 7, and in which electrons are distributed in order according to their energy level. Electrons with less energy will be spinning at level 1.

Each level is divided into sub-levels. These sub-levels into which each level is divided can be up to 4 and these are called: s, p, d, f. In the sub-level s there can only be a maximum of 2 electrons, in p there can be a maximum of 6 electrons, in the sub-level d 10 electrons and finally in the sub-level f there can be a maximum of 14 electrons.

In level 1 there is only one sub-level, which will be the s. In level 2 there are 2 sub-levels, the s and the p. At level 3 there are 3 sub-levels s, p and d. And at level 4 there are 4 sub-levels, the s, the p, the d and the f.

So, the maximum number of electrons in a p sub-level is 6.

Identify the term being defined. the force that keeps the nucleons bound inside the nucleus of an atom the amount of energy needed to split the nucleus into individual protons and neutrons the difference between the mass of the nucleons and the mass of the atom

Answers

Strong Nuclear Force; is the force that keeps the nucleons bound inside the nucleus of an atom. It is a short range attractive force that acts between all nucleons in the nucleus of the atom that is much stronger than electrical forces.
Binding energy; is the amount of energy needed to split the nucleus into individual protons and neutrons. It is the minimum energy required to separate a nucleus into free, unbound nucleons. The energy lost in the process of binding together the nucleons in the nucleus of an atom.
Mass defect is the difference between the mass of a nucleus and the sum of the masses of its component nucleons.

Answers:

1. Nuclear Force:Nuclear force is also referred to as the strong nuclear force and acts between the protons and neutrons also referred to as nucleons within the nucleus of an atom. The nuclear force is able to counteract the repulsion between the nucleons and hold them together thus giving a nucleus its stability.

2. Binding Energy:Binding energy refers to the amount of energy that would enable to overcome the strong nuclear force that pulls the nucleons in a compact mass. It plays its role in nuclear reactions including fission and fusion.

3. Mass Defect:The mass defect is calculated with the help of the total mass of the individual nucleons. Mass defect is essential in nuclear reactions since it explains reasons such as fission that occurs when a heavy nucleus splits into lighter nuclei as a way of releasing energy.

What hormone promotes active tubular secretion of potassium ions into, along with sodium absorption from, filtrate in the distal convoluted tubule (dct) and collecting ducts?

Answers

The hormone that promotes active tubular secretion of potassium ions into, along with sodium absorption from filtrate in the distal convoluted tubule and collecting duct is Aldosterone. This hormone is produced by the adrenal gland and acts mainly in the functional unit of the kidney to aid in the conservation of sodium, secretion of potassium, water retention and to stabilize blood pressure. It indirectly regulates blood levels of electrolytes and helps to maintain the blood pH.

How many moles of water h2o are present in 75.0 g h2o?

Answers

4.17 moles. Good luck! :)

In a reduction half-reaction, which amount is shown?

A. The number of atoms needed to balance the equation

B. The number of electrons and element gains

C. The number of electrons an element loses

D. The number of electrons needed to balance the equation

Answers

Answer:
  In a reduction half-reaction the number of electrons an element gains are shown.

Explanation:
Reduction reactions are those reactions in which an atom gains electron (s). In a cell a redox reaction is carried out either utilize electricity or produce electricity. Let suppose a general redox reaction shown below,

A⁺ + B   → A + B⁺

For above reaction the reduction half-reaction is as follow,

A⁺ + 1 e⁻ → A

(Hence, in this reaction only the number of electrons an element gain are shown)

And the oxidation half reaction is as follow,

B   → B⁺ + 1 e⁻

can producers function without sunlight? Why or Why not?

Answers

The answer is no because producers need the energy from the sun in order to produce. Hope this helped!

Calculate the molarity of a kcl solution made by dissolving 21.2 g of kcl in a total volume of 500. ml. calculate the molarity of a kcl solution made by dissolving 21.2 g of kcl in a total volume of 500. ml. 0.142 0.284 7.03 0.569 none of the above

Answers

Molarity of solution = [tex] \frac{\text{weight of solute i.e. KCl (g)}}{\text{Gram Molecular Weight X Volume of solution(L)}}[/tex]

Gram molecular weight of KCl = 74.55 g
Volume of solution = 500 ml = 0.5 l

∴ Molarity = [tex] \frac{21.2}{74.55 X 0.5}[/tex] = 0.569 M

Write a balanced equation for the complete combustion of glucose (c6h12o6). oxygen gas is the other reactant in this combustion reaction. the products are co2 and h2o. write a balanced skeleton equation for this reaction.

Answers

skeleton equation C6H12O6 + O2 -----> CO2 + H2O
balanced equation C6H12O6 + 6O2 -----> 6CO2 + 6 H2O

Skeleton equation [tex]C_6H_12O_6 + O_2[/tex] → [tex]CO_2 + H_2O[/tex]

Balanced equation [tex]C_6H_12O_6 + 6O_2[/tex] → [tex]6CO_2 + H_2O[/tex]

What is a balanced chemical equation?

A balanced equation is an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge is the same for both the reactants and the products.

Skeleton equation -A skeletal chemical equation is a representation of a chemical reaction using chemical formulae of reactants and products.

Skeleton equation [tex]C_6H_12O_6 + O_2[/tex] → [tex]CO_2 + H_2O[/tex]

Balanced equation-A balanced chemical equation tells you the amounts of reactants and products needed to satisfy the Law of Conservation of Mass.

Balanced equation [tex]C_6H_12O_6 + 6O_2[/tex] → [tex]6CO_2 + H_2O[/tex]

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Describe what a polar covalent bond is and name a common compound that has a polar covalent bond holding it together

Answers

Polar covalent are type of covalent bond ( sharing of electrons) in which the electrons shared by the atoms spend a greater amount of time, on the average closer to one atom's nucleus. An example of a compound that has a polar covalent bond is water (H2O). The electrons are unequally shared, with the oxygen atom spending more time with electrons than the hydrogen atoms. Since electrons spend more time with the oxygen atom, it carries a partial negative charge.

A 25.0L sample of gas at STP is heated to 55c at 605 torr. What is the new volume?

Answers

First we can find the number of moles of gas for the given volume at STP and then calculate the new volume
Molar volume states that there 1 mol of any gas occupies a volume of 22.4 L at STP.
Therefore if 22.4 L contains - 1 mol of gas
then 25.0 L contains - 25.0 L / 22.4 L/mol = 1.12 mol
when the pressure and temperature conditions are changed the number of moles of gas remains the same
using the ideal gas law equation we can find the volume of the gas
PV = nRT
where P - pressure - 605 torr x 133.3 Pa/torr = 80 647 Pa
V - volume
n - number of moles - 1.12 mol
R - universal gas constant - 8.314 Jmol⁻¹K⁻¹
T - temperature in kelvin - 55°C + 273 = 328 K
substituting these values in the equation
80 647 Pa x V = 1.12 mol x 8.314 Jmol⁻¹K⁻¹ x 328 K
V = 37.9 L
new volume at the given conditions is 37.9 L

Final answer:

To find the new volume of the gas, we can use the combined gas law formula and solve for V2. By plugging in the given values into the formula, we find that the new volume is approximately 27.2 L.

Explanation:

To solve this problem, we can use the combined gas law formula, which relates the initial and final volume, temperature, and pressure of a gas:

V1/T1 = V2/T2

Given that the initial volume (V1) is 25.0 L, the initial temperature (T1) is 0°C, and the final temperature (T2) is 55°C, we can convert the temperatures to Kelvin by adding 273 to each value.

Plugging in the values, we get:

25.0 L / (273 K) = V2 / (273 K + 55°C)

Solving for V2, we find that the new volume is approximately 27.2 L.

Why do living things use enzymes instead of heat as a source of activation energy?

Adding heat would not give the reactants enough energy.

Adding heat does not affect how chemical reactions take place.

Adding sufficient heat would harm or kill a living thing.

Adding heat gives reactants the wrong kind of energy.

Answers

Adding sufficient heat would harm or kill a living thing.

Living things use enzymes instead of a heat source because they speed up chemical reactions as well as the metabolism in those living. Adding sufficient heat would harm or kill a living thing, also enzymes are far more efficient. A single enzyme can often carry out thousands of reactions per second. Living organisms use enzymes for activation energy because they speed up chemical reactions.

Check all correct statements concerning pentyne.
contains 3 carbons
contains 5 carbons
contains 7 carbons
has only single bonds
has a double bond
has a triple bond
is an alkyne
is an alkene
is an alkane

Which statement is not true of alkenes?
They are unsaturated.
They are reactive.
They have double bonds.
They are more stable than alkanes.

Butene would have 4 carbon atoms and a ______ bond.
Single
Triple
Double

Which type of reaction to alkenes generally undergo?
Substitution
Displacement
Redox
Addition

If the carbon atom of hydrocarbon is bonded to less than 4 other atoms, the hydrocarbon is considered _______.
aromatic
diluted
saturated
unsaturated

Which of the following apply to unsaturated hydrocarbons? Select all that apply.
They do not have isomers.
They are more stable than saturated hydrocarbons.
They will react readily with other elements and compounds.
They have double and triple bonds.
They only have single bonds.

A straight chain hydrocarbon with the formula C5H10:
has a triple C-C bond
has a double C-C bond
is essentially inert
is unstable and extremely reactive

What is the general formula for alkenes?
CnH2n+2
CnH2n
CnH2n+1
CH2n+2

Choose the statements about benzene that are correct.
all benzene hydrocarbons are CnHn+2
All C-C bonds share 2 pairs of electrons.
Three C-C bonds share 2 pairs of electrons.
All of the C-C bonds are actually identical.
The structure of the molecule is closed like a ring structure.

The last one is attached as a pic.

Answers

1)  Check all correct statements concerning pentyne.

a)  contains 5 carbons

b)  has a triple bond

c)  is an alkyne

2)  Which statement is not true of alkenes?

a)  They are more stable than alkanes.

3)  Butene would have 4 carbon atoms and a ______ bond.

a) Double Bond

4)  Which type of reaction to alkenes generally undergo?

a) Addition Reaction

5)  If the carbon atom of hydrocarbon is bonded to less than 4 other atoms, the hydrocarbon is considered _______.

a) Unsaturated

6)  Which of the following apply to unsaturated hydrocarbons? Select all that apply.

a)  They will react readily with other elements and compounds.

b)  They have double and triple bonds.

7)  A straight chain hydrocarbon with the formula C5H10:

a)  has a double C-C bond

8)  What is the general formula for alkenes?

a)  CnH2n

9)  Choose the statements about benzene that are correct.

a)  All of the C-C bonds are actually identical.

b)  The structure of the molecule is closed like a ring structure.

Explanation:

1) Pentyne is an unsaturated hydrocarbon with formula [tex]C_5H_8[/tex]. It is an alkyne molecule with single triple bond present in it.

Correct statements are:

Contains 5 carbonsHas a triple bond Is an alkyne

2) Alkenes are unsaturated hydrocarbons with double bonds.

They are unsaturated.They are reactive. They have double bonds.

3) Butene is an unsaturated hydrocarbon with 4 carbon atoms and double bonds.

4)Alkene undergo addition reaction easily.

5)If the carbon atom of hydrocarbon is bonded to less than 4 other atoms, the hydrocarbon is considered unsaturated.

6)The correct statements are:

They have double and triple bonds. They will react readily with other elements and compounds.

7)The general formula of :

Alkane = [tex]C_nH_{2n+2}[/tex]

Alkene = [tex]C_nH_{2n}[/tex]

Alkyne = [tex]C_nH_{2n-2}[/tex]

The [tex]C_5H_{10}[/tex] is an alkene with double C-C bond.

8) The general formula of alkene is given by: [tex]C_nH_{2n}[/tex]

9) Benzene is an aromatic cyclic compound with six membered carbon ring with alternative double bonds. Due to conjugation of double bond all the C-C bonds are identical.

All C-C bonds share 2 pairs of electrons.All of the C-C bonds are actually identical.The structure of the molecule is closed like a ring structure.

What mass of h2o is formed when h2 reacts with 384 grams of o2?

Answers

Answer is: mass of water is 432 grams.
Chemical reaction: 2H₂ + O₂ → 2H₂O.
m(O₂) = 384 g.
M(O₂) = 2 · 16 g/mol = 32 g/mol, molar mass.
n(O₂) = m(O₂) ÷ M(O₂).
n(O₂) = 384 g ÷ 32 g/mol.
n(O₂) = 12 mol, amount of substance.
From chemical reaction: n(O₂) : n(H₂O) = 1 : 2.
n(H₂O) = 12 mol · 2 = 24 mol.
m(H₂O) = n(H₂O) · M(H₂O).
m(H₂O) = 24 mol · 18 g/mol.
m(H₂O) = 432 g.

A compound consists of 72.2% magnesium and 27.8% nitrogen by mass. what is the empirical formula

Answers

MgThe empirical formula is calculated as follows
fin the moles of each element
moles = % composition/ molar mass

magnesium(Mg) = 72.2/24 = 3moles
Nitrogen(N) = 27.8/14 = 1.986 moles

find the moles ration by dividing each mole by the smallest mole ( 1.986 moles)

that is

magnesium)Mg) = 3/1.986 = 1.5
Nitrogen (N)= 1.986/1.986 =1
multiply both the mole ratio to remove the decimal

magnesium (Mg) = 1.5 x2 = 3
nitrogen (N)= 1 x2 =2

therefore the empirical formula = Mg3N2

4. How many moles of LiOH are needed to exactly neutralize 2.0 moles of H2SO4?

Answers

the balanced equation for the neutralisation reaction is as follows
2LiOH + H₂SO₄ ---> Li₂SO₄ + 2H₂O
stoichiometry of LiOH to H₂SO₄ is 2:1
both LiOH and H₂SO₄ are strong bases and strong acids respectively, therefore they completely ionise into their respective ions
1 mol of H₂SO₄ is neutralised by 2 mol of H₂SO₄
therefore 2.0 mol of H₂SO₄ is neutralised by - 2 x 2.0 = 4.0 mol of LiOH
4.0 mol of LiOH is required to neutralise 2.0 mol of H₂SO₄

How do you do part Di?

Answers

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similarlattice energies, Give two reasons why the lattice energies of the oxidesare similar. .... The structures oftwo compounds commonly found in food, lauric acid, C12H2O2, and .

go to this site it's the answer sheets just find the problem your on

If a sample has a mass of 245.8 grams and takes up 94ml of space, what is the density of the sample?

Answers

To find the density of any sample, you need to know the Mass (grams), and its Volume (measured in mL or cm³). Divide the mass by the volume in order to get a sample's Density.

Density (P)= Mass(m)/Volume(V)

P=m/V

P=245.8grams/94ml

P=2.65grams per ml

if 1.20 moles of copper react with mercuric nitrate how many moles of mercury form

Answers

Final answer:

To determine the number of moles of mercury formed when 1.20 moles of copper react with mercuric nitrate, you need to examine the balanced chemical equation. For every 2 moles of copper that react, 2 moles of mercury are formed. Therefore, if you have 1.20 moles of copper, you will also have 1.20 moles of mercury formed.

Explanation:

In order to determine the number of moles of mercury formed when 1.20 moles of copper react with mercuric nitrate, you need to examine the balanced chemical equation for the reaction. The balanced equation is:

2Cu + Hg(NO3)2 → 2Hg + 2Cu(NO3)2

From this equation, you can see that for every 2 moles of copper (Cu) that react, 2 moles of mercury (Hg) are formed. Therefore, if you have 1.20 moles of copper, you will also have 1.20 moles of mercury formed in the reaction.

Given the balanced equation for the reaction of copper with mercuric nitrate, 1.20 moles of copper will produce 1.20 moles of mercury.

Given the reaction between copper and mercuric nitrate, we can use stoichiometry to determine the moles of mercury produced. The balanced chemical equation for this type of reaction is:

Cu + Hg(NO₃)₂ → Cu(NO₃)₂ + Hg

From this equation, we see that 1 mole of copper (Cu) reacts with 1 mole of mercuric nitrate (Hg(NO₃)₂) to produce 1 mole of mercury (Hg).

Since we have 1.20 moles of copper reacting, we can directly infer that:

1.20 moles of Cu → 1.20 moles of Hg

Identify the balanced chemical reaction: Cu + Hg(NO₃)₂ → Cu(NO₃)₂ + HgDetermine the mole ratio between copper and mercury from the balanced equation (1:1).Using this ratio, 1.20 moles of copper will produce 1.20 moles of mercury.

Certain high-frequency radiations are likely to cause harm to astronauts landing on Mars. A detector for which type of electromagnetic radiation is most suitable to study this harmful radiation on Mars? Infrared Radio waves Ultraviolet Visible light

Answers

that's wrong. I'm not sure but I think it might be ultraviolet.

Answer:

Ultraviolet

Explanation:

Given the options: Infrared, Radio waves, Ultraviolet and Visible light, ordering them by frequency (for highest to lowest) we get:

Ultraviolet

Visible light

Infrared

Radio waves

Knowing that high-frequency radiations are likely to cause harm to astronauts landing on Mars, then the detector of Ultraviolet is most suitable

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