Which one of the following is a balanced equation?
o a. 2nh3 (g) + 3mg (s) - 3h2 (g) + mg3n2 (s)
ob. 4nh3 (9) + mg(s)* - h2(g) + mg3n2 (s)
oc. nh3 (9) + mg (s) - h2 (9) + mg3n2 (s)
o d. ca (s) + 02 (9) - 2cao (s)

OA is a balanced equation.

Explanation: For an equation to be balanced, the number of atoms and the total charge of each element in the reaction, of the product and reactant side must be the same.

Considering OA; 6 atoms of nitrogen is present in the reactant side. Shifting to the product side, 6 atoms of nitrogen is also present. Taking the other element in the reaction into account, the number of atoms of each element balances on both sides.

to make a supersaturated solution, make a saturated solution of sugar by adding 360 grams of sugar to 100 ml of water at 80 degrees celsius. when the water cools back down to 25 degrees, that 360 grams of sugar will still be dissolved even though the water should only dissolve 210 grams of sugar.

1. they vary with a higher number because boiling is way hotter than melting