Find (a) the total number and (b) the total mass of protons in 34 mg of NH3 at STP. Will the answer change if the temperature and pressure are changed ?

Question

TextMole Concept in Chemistry

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Calculate the total number of electrons present in one mole of methane.

Find (a) the total number and (b) the total mass of neutrons in 7 mg of 14C. (Assume that mass of a neutron = 1.675 × 10–27 kg).

In three moles of ethane (C2H6), calculate the following:

How are 0.50 mol Na2CO3 and 0.50 M Na2CO3 different?

Which one of the following will have the largest number of atoms?