The mass of eight atoms of element X is equal to the mass of two silicon atoms. X is not the actual symbol of the element. What is the relative atomic mass of element X ?

[Relative atomic mass: Si= 28]

The relative molecular mass of K₃M(CN)₆ is 329. What is the relative atomic mass of element M?

[Relative atomic mass: K= 39, C=12, N=14]

What is the number of atoms in 1.5 moles of sulphur dioxide, SO₂ ? [ Avogadro constant= 6.02x 10²³ mol^-1]

Which statement explains that carbon-12 was chosen as a standard reference for relative atomic mass?

Which of the following gases contains 0.6 mole of atoms at room temperature and pressure?

[ Molar volume of gas= 24 dm³mol^-1 at room condition]

How much is the mass of nitrogen that is contained in 3.01 x 10²³ molecules of nitrogen ?

[ Relative atomic mass: N=14, N_A=6.02x 10²³ mol ^-1]

480 cm³ of gas R at room temperature and pressure has a mass of 0.04 g. What is the relative molecular mass of gas R?

[ Molar volume of gas at room temperature and pressure= 24 dm³ mol ^-1]

Which sample contains the same number of molecules as in 4.25 g ammonia gas? [ Relative atomic mass: H=1, N=14, O=16, Cl=35.5]

What is the number of moles of zinc chloride, ZnCl₂, in 13.6 g of zinc chloride? [ Relative atomic mass: Cl=35.5, Zn=65]