Some Basic Concepts of Chemistry Set-3

Q1. The total number of electrons present in one molecule of methane is;

Q2. Calculate the number of moles for each case respectively;
I. $22g$ $\text{CO}_2$
II. $N_A/4$ Molecule of $\text{CO}_2$
III. $22.4$ $\text{L}$ $\text{CO}_2$ at STP

Q3. How many moles of carbon present in $88$ $g$ of $\text{CO}_2$ [Atomic mass of $C = 12$ $amu$ and $O = 16$ $amu$]

Q4. The number of molecules in $4.25gm$ ammonia is

Q5. How many atoms are present in $28\text{ grams of } \text{N}_2$?

Q6. How many atoms are present in $0.046$ $g$ of ethanol?

Q7. Number of g-atom of S present in $49$ $g$ $H_2SO_4$ are:

Q8. Which of the following pair of gases contain the same number of molecules?

Q9. The mass of a molecule of water is

Q10. How many moles of hydrogen atoms present in $34$ $g$ of $NH_3$?