Question

(a) In a chemical reaction 100g of calcium carbonate breaks down into 46g of carbon dioxide and unknown amount of calcium oxide. Using the Law of Conservation of Mass calculate how much does calcium oxide weigh.(b)Write the chemical formula (by using the steps) for Zinc phosphate.(c)Water obtained from any source contain hydrogen and oxygen in the ratio of 1:8 by mass. What Law follow from it? Define the Law.

Answer 1

Explanation:

Solution

verified

Verified by Toppr

Correct option is B)

Chemical reaction involved is:

CaCO

3

→CaO+CO

2

Molar mass of CaCO

3

=40+12+16×3=100 g

According to the balanced reaction 100 g of CaCO

3

produces 1 mol of CO

2

i.e. 22.4 L at STP.

∴50 g CaCO

3

will produce

100

22.4

×50=11.2 L CO

2

at STP.

please mark me brainlist