Plz help will mark brainliest and also explain why if u can

see below

Explanation:

1. Insulator

2. conductor

3. Insulator

4. conductor

an Insulator is something that keeps the cold/heat in a place. like when a house is being built, they will place insulation in the walls to keep the heating and cooling inside. same concept as in example 1.

a conductor is when something is conducting heat or cold. when the spaghetti in scenario 2 is cooking, it is conducting heat from the boiling water.

n+h→nh3

we must remember that nitrogen and hydrogen are both diatomic molecules in their standard gas form. this adjusts the equation to

n2+h2→nh3

now we need to adjust coefficients in order to balance the atoms on each side of the equation. currently we have 2 atoms of nitrogen and 2 atoms of hydrogen on the reactant side and 1 atom of nitrogen and 3 atoms of hydrogen on the product side.

we can balance the hydrogens by placing a coefficient of 2 in front of ammonia and a coefficient of 3 in front of the hydrogen.

n2+3h2→2nh3

this gives us 6 hydrogen on each side and coincidentally the nitrogens now equal 2 on each side.

first one is the correct answer