Atoms and Molecule
Which of the following is the chemical formula of sodium chloride?
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16 g of water is equal to ____ moles.
The number of electrons present in M shell of chlorine is:
The mass of 3.0115×1023 molecules of chlorine is:
Chlorine is a ________ element.
Calculate the mass of water which contains the same number of molecules as are contained in 60 g of oxygen.
Calculate the number of moles for the 84 g of He.
The ratio of C : O by mass in CO2is:
An atom contains 14 protons and 16 neutrons. What is its mass number?