Question

1. The mass of carbon in carbon dioxide containing 0.3 moles of oxygen is
(a) 1.8 g (b)18 g (c)3.6 g (d)36 g
2. Number of helium atoms present in 22400 mL of helium gas at STP is
(a) 6.02 x 1023 (b)1.66 x 1024 (c)5600 (d)2 x 6.02 x1023
3.An oxide of a metal M contains 20% of oxygen by weight. If the formula of its chloride
is MCl2, the atomic mass of Mis
(a) 40 u (b)60 u
(c)48 u
(d)64 u
4. The number of moles of sodium monoxide in 620 g is
(a)1 b)10 (c)18 (d)100
5. Calculate the mass percentage of carbon, oxygen and hydrogen in glucose
6. Calculate the mass of copper present in 100 g of CuSO4​

Answer 1

Answer:

1 a

2 c

3 a

4 b

5 ans is PC^2

6 Idk