This is true. Hope this helped:)
B) the mass of the reactant equals the mass of the product.
Answer:
no
Explanation:
they cannot because they contain the same amount of liquid
<span>a. the chemical energy stored in living things i hope this helps you</span>
Answer : The temperature of the gas is, 43.4 K
Explanation :
The expression used for work done will be,

where,
w = work done = 200 J
n = number of moles of gas = 0.40 mol
R = gas constant = 8.314 J/mole K
T = temperature of gas = ?
= initial volume of gas = X
= final volume of gas = 
Now put all the given values in the above formula, we get :


Thus, the temperature of the gas is, 43.4 K