Elements X and Y form compounds $XY_2$ and $X_3Y_2$. If 20 g of $XY_2$ contains 0.2 moles and 18 g of $X_3Y_2$ contains 0.1 moles. What are the atomic weights of elements X and Y?

How many moles are present in 18g of water (H2O)?

The molar mass of oxygen atoms is 16 g/mol. What is the mass of 0.25 moles of oxygen atoms?

The mass of 2.5 g.atom of oxygen is

Suppose the elements X and Y combine to form two compounds $X{Y_2}$ and ${X_3}{Y_2}$. When 0.1 mole of $X{Y_2}$ weights 10 g and 0.05 mole of ${X_3}{Y_2}$ weights 9 g, the atomic weights of X and Y are

What is the mass percent of carbon in $C{O_2}$

7.5 gr of a gas occupy 5.8 L of volume at STP, the gas is

The Largest number of molecules is in

Which of the following has the maximum number of electrons

What is the mass of one mole of carbon dioxide (CO2)?

Which of the following has greatest no. of atoms