1.) What is the charge present on hydrogen carbonate ion?
2.) How many helium atoms are present in 52u helium?
3.) What is the molar mass of calcium carbonate?
4.) How many oxygen molecules are present in 32 g of oxygen.
5.) What is the group of 6.022 x 1023 particles known as?
6.) From the following, select the binary and tertiary compounds.
HCI, H2O, H2SO4, Na2CO3, H2O2, CaCO3
7.) Which element is used as the reference for atomic mass scale?
8.) Neon gas consists of single atoms; what mass of neon contain 6.022 x 1023 atoms?
9.) How many times heavier is one atom of carbon than one atom of oxygen?
10.) How many grams of chlorine are contained in one mole of chlorine?



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