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?

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

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

Bohr's "planetary project" was widely accepted because he was able to explain a factor that Ruthford failed to achieve. Bohr was able to explain how electrons and energy worked in a simple atom, such as hydrogen, which consists of an electron orbiting a single proton.

In addition, he was able to explain, using the principles of gravity, how electrons do not fall on top of the proton but rather orbit around the proton.

Explanation:

Danish physicist Niels Bohr proposed an atomic model for the hydrogen atom which was later extended to other elements. Its model is based on the Solar System, in which the planets rotate around the sun. For Bohr, electrons rotate in orbit around the atomic nucleus grouped into energy levels.

Until 1913, there was no satisfactory model that explained even the simplest of atoms - hydrogen, which consists of an electron orbiting a single proton.

By assigning the concept of energy levels, Bohr was able to create a version of the hydrogen atom that was possibly stable and satisfying spectral observations. Until then, all theoretical predictions suggested that it should not exist for more than a split second - a failure that bothered physicists a great deal. It was therefore a monumental advance.

Bohr was also able to explain why electrons do not fall on protons using concepts of gravity. In Bohr's atomic model, electrons rotate around the nucleus like planets around the sun. According to Bohr, an electron does not fall into the nucleus because it cannot: its orbits are like steps in a ladder. We may be in one or the other but not in two. Imagine the atom as a kind of tiny football stadium.

The core is in the center of the lawn. Electrons can run around the steps of the stands. From time to time, they jump from step to step. If they go up they use energy, down they release energy.

However, electrons can never leave the stands to invade the field. Bohr did not explain why the ban.