Which of the following element does not have one valance electron?

The equation N2 + 3H2 —– 2NH3 can be interpreted as follows: 1 mol of N2 reacts with 3 mol of H2 to form 2 mol of NH3. Is this statement true or false?

The empirical formula of a compound is CH2O, and its molar mass is 90 g. What’s the molecular formula?

Which one is the correct formula of carbon monoxide?

When the equation below is balanced, the coefficient of aluminum chloride is:  AlCl3 + H2SO4 → Al2(SO4)3 + HCl

Select the balanced equation for the combustion of ethylene, C2H4 shown below.

What’s the molecular formula of a compound that contains 40%C, 6.66%H and 53.3% O. (Molar mass of this compound is 150 g)

Which of the choice below show the correct charge and mass for the corresponding sub atomic particle.

Which on the the single replacement reaction?

By 2050, which country is expected to have the world’s largest Muslim population?