PLEASE PLEASE HELP ASAP!

Q = 146.25  J

Explanation:

Given that,

The mass of 10 copper pennis = 25 grams

It warm up from 23°C to 38°C.

The specific heat capacity of copper is 0.39 J/g°C

We need to find the energy absorbed by the pennies. The expression for the energy absorbed is given by :

So, 146.25  J of energy is absorbed by the pennies. Hence, this is the required solution.

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.

your answer would be a. 12.5 kg