H2 + o2 > h2o what is the mole ratio of hydrogen to water?

The mole ratio of reactants and products is learned by comparing the coefficients of the balanced equation. The current equation is unbalanced, so adding some coefficients to help balance the reactants and products is necessary.

2H2 + O2 —— 2H2O

In this equation, you can count the number of hydrogens and oxygens on each side to verify that there are the same on each. Now, compare the coefficients:

2H2:2H2O

2:2

The mole ratio of hydrogen to water is 2:2, simplified to 1:1. Choosing which ratio is to be used is dependent on the context of the question, however both are technically correct.

the answer is 303.15 or 303

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.