Atoms and Molec...

An atom is:

10.0 g of CaCO$_3$ on heating gave 4.4 g of CO$_2$ and 5.6 g of CaO. The observation is in agreement with the:

Atomic theory was given by:

Which of the following contains the largest number of molecules?

Which of the following weighs the most?

'All matter is composed of very small particles called Parmanu' was first suggested by:

Which of the following compound has formula mass of 322 u?
$(H= 1, C=12, 0=16, Na=23, S=32, Cu=63.5)$

2.40 g of the element $Z$ combines exactly with 1.6 g of oxygen to form a compound with the formula $ZO_2$. What is the relative atomic mass of $Z$?

The mass of one atom of carbon-12 is:

6.4 g of oxygen will contain ______ number of oxygen molecules.