Question

C. element D. compound
4. Solve problems :
A. What is the ratio of molecules in 1 mole
of NH, and 1 mole of HNO,
(Ans. : 1:1)
B. Calculate number of moles of hydrogen
in 0.448 litre of hydrogen gas at STP
(Ans. : 0.02 mol)
C. The mass of an atom of hydrogen is
1.008 u. What is the mass of 18 atoms
of hydrogen. (18.144 u)
D. Calculate the number of atom in each
of the following (Given : Atomic mass
of I= 127 u).
a. 254 u of iodine (I)
b. 254 g of iodine (I)
(Ans. : 2 atoms, 1.2044 x 1024 atoms)
E. A student used a carbon pencil to write
his homework. The mass of this was
found to be 5 mg. With the help of this
calculate.
a. The number of moles of carbon in his
homework writing.
(Ans : 4.16 x 104)​

Answer 1

hey mate, sorry but very tough question!!! ♡♡♡

Answer 2

Answer:

sorry bro this is chemistry