PLEASE HELP Question 1:
In the reaction BaCl2 (aq) + Na2SO4 (aq) → BaSO4 (s) + 2NaCl (aq), what phases are the reactants in before the reaction?
A)

Both reactants are gases.

B)

BaCl2 is a liquid, and Na2SO4 is a gas.

C)

BaCl2 is a solid, and Na2SO4 is in aqueous solution.

D)

Both reactants are in aqueous solution.

Question 2:
A chemical reaction has the equation 4Al (s) + 3 O2 (g) → 2Al2O3 (s). What type of reaction is this?

A)

Single displacement

B)

Double displacement

C)

Decomposition

D)

Synthesis

Explanation:

Question 1

Ans : D

Question 2

Ans: D

hope it helps!

1)

2)

Explanation:

Question 1:

BaCl2 (aq) + Na2SO4 (aq) → BaSO4 (s) + 2NaCl (aq)

[------Reactants--------------]     [--------Products---------]

The reactants are in aqueous form as written in the reaction.

Question 2:

This reaction is a synthesis reaction as a new product is formed from reactants that are totally different from each other.

Hope this helped!

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.