Question

In a chemical reaction, which is MOST LIKELY reactant for these products?

? ➡️ CaO + CO2

A. 3O2
B. CO2
C.2KCI
D. CaCO3

Answer 1

CaCO3. the Ca is used to become CaO. the C become part of CO2. and the O3 become part of both products

Answer 2

D.
`CaCO_3`

Step-by-step explanation:

We are given that a chemical reaction

_
`\implies CaO+CO_2`

We have to find the value of reactant for given product.

Reactant: The substance on the left side in chemical reaction are called reactants.

Product: The substance on the right side in chemical reaction are called products.

In given product, there are calcium oxide and carbon dioxide.

Therefore, calcium, oxygen and carbon must be present in reactants.

`CaCO_3\implies CaO+CO_2`

Hence, option D is true.

Answer: D.
`CaCO_3`