Question

When 3.0 g carbon is burnt in 8.00 g oxygen.........

Answer 1

Answer:

Explanation:

3g C = 3/12 moles C = 0.25 moles C

8g O = 8/32 moles ) O2 = 0.25 moles O2

Now, we know that

                                  C + O2 → CO2

⇒ 0.25 moles C + 0.25 moles O2 → 0.25 moles CO2

Answer 2

Answer:

1 gram of h requires=8 gram O gas

So, 3 gram of h requires = 8*3 g of O gas

                                            = 24 g of O gas

Thus 24 grams of o gas is req.

The ans. will be governed by the law of constant proportions.

Since C and O combine in fixed proportion of 3:8 by mass to produce 11 g of co2

hence evenn if 3 g c is burnt in 50 g o the extra O will remain unreacted

i.e.,42g

The ans is not copied i wrote it so respect my time