Chemistry, 18.09.2019 20:30 OKgoogle

You find that 7.36g of a compound has decomposed to give 6.93g of oxygen. the only other element in the compound is hydrogen. if the molar mass of the compound is 34.0g/mol, what is its molecular formula?

Answers: 1

Show answers

Answers

Answer from: Lexi5170

First solve the moles of oxgen present in the compound

mol O = 6.93 g O ( 1 mol O / 16 g O )
mol O = 0.43 mol H

then solve the moles of hydrogen present
mol H = ( 7.36 - 6.93) g H ( 1 mol H / 1 g H)
mol H = 0.43 mol H
so the O and H are in the same mole content so the molecular formula would be OH, but the molar mass will not satisfy. so the answer would be
H2O2

Answer from: Jasten

H2O2.

Explanation:

Okay, from the question we can see that the compound contains only two elements, that is, Hydrogen and Oxygen. Also,in the question we have some parameters, they are;

Mass of the Compound = 7.36 grams.

The compound decomposed to give Oxygen, the mass of the oxygen is equal to 6.93 grams.

The first thing to do is to determine the number of moles. The number of moles will now be used to determine the molecular formula of the compound.

To calculate the number of moles,n we need the formula below:

Number of moles,n= mass(in grams)/molar mass (In grams per mol). (1).

===> Numbers of moles,n= 6.93 grams ÷ 16 grams per mole.

==> 0.433125 mol of oxygen

So, the total mass of the compound= mass of Hydrogen + mass of Oxygen. (2).

7.36 grams = mass of Hydrogen + 6.93 grams.

==> Mass of Hydrogen = 7.36 grams - 6.93 grams = 0.43 grams.

Using equation (1), the number of moles of Hydrogen: Molar mass of

===>0.43/ 1.00784 grams per mol.

= 0.43 mol.

Hence, there is a need for us to divide both moles by the smaller but since we both are the same, we will just pick on. Therefore, for oxygen and hydrogen it is going to be 1:1.

So, (16+1) b = 34 g/mol

===> 34/17=b= 2.

Hence, 2{OH} = H2O.

The decomposition Reaction is given below;

2 H2O2 > 2 H2O + O2

Answer from: Quest

12 is probably the typical age for a first kiss but i think its to young.

Answer from: Quest

answer seismograph;

Other questions on the subject: Chemistry

Chemistry, 22.06.2019 02:30, BornAdopted21

Which piece of equipment would me most useful for measuring the volume of some water? a. pan balance b. graduated cylinder c. tweezers d. flask quick

Answers: 2

continue

Chemistry, 22.06.2019 05:40, yah2muchh

Calculate: select the worksheet tab. this tab you calculate the analyte concentration.  fill in the first set of boxes ("moles h2so4" and "moles naoh") based on the coefficients in the balanced equation. (if there is no coefficient, the value is 1.)  record the appropriate volumes in the "ml naoh" and "ml h2so4" boxes.  record the concentration of the titrant in the m naoh box. click calculate. what is the concentration listed

Answers: 2

continue

Chemistry, 22.06.2019 21:00, cxttiemsp021

The rate constant for the reaction below is 6.2 x 10−5 mol l−1 s −1. if the initial concentration of a is 0.0500 m, what is its concentration after 115 s?

Answers: 1

continue

Chemistry, 23.06.2019 00:30, Toyared

Many bird species build nests in which they raise their offspring. one of these species is known as the magnolia warbler. breeding pairs of magnolia warblers build nests out of pieces of grass and twigs. the female warbler will then lay her eggs in the nest and sit on the eggs for a few weeks until they hatch. after the offspring have hatched, the female will continue to sit on the newborn chicks to keep them warm. both the male and the female bring food for the offspring to eat until the young are mature enough to find food on their own. which of these most likely describes why birds such as the magnolia warbler build nests in which to raise their offspring? a. nest building decreases the amount of energy used by the parent birds to raise their offspring to adulthood. b. nest building increases the probability that the offspring will survive and eventually produce offspring of their own. c. nest building decreases the amount of food that the offspring require the adult birds to provide. d. nest building increases the probability of the offspring being located by airborne predators.

Answers: 1

continue

You know the right answer?

You find that 7.36g of a compound has decomposed to give 6.93g of oxygen. the only other element in...