How many grams of calcium phosphate can be produced when 78.5 grams of calcium hydroxide reacts with excess phosphoric acid? unbalanced equation: h3po4 + ca(oh)2 → h2o + ca3(po4)2 show, or explain, all of your work along with the final answer.

109.56g

Explanation:

H3PO4 + Ca(OH)2 → H2O + Ca3(PO4)2

The balanced equation is given as;

3Ca(OH)2 + 2(H3PO4) => Ca3(PO4)2 + 6H2O

Molar mass of Ca(OH)2 = 74.092g/mol

But Number of moles = Mass / Molar mass = 78.5 / 74.092 = 1.0595 mol

From the reaction above,

3 mol of Ca(OH)2 produces 1 mol of Ca3(PO4)2.

1.0595 mo would produce x?

3 = 1

1.0595 = x

x = 1.0595 / 3 = 0.3532mol of Ca3(PO4)2

Mass of Ca3(PO4)2 = Number of moles * Molar mass = 0.3532 * 310.18 = 109.56g

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.