The Kj of heat that are needed to completely vaporize 1.30 moles of H2O if the heat of vaporization for water is 40.6 Kj/mole is calculated as below
Q(heat) = moles x heat of vaporization)
=1.30 mol x40.6 kj/mol= 52.78 Kj is needed
Answer:
see below
Explanation:
1. 1 mol Mg = 24.31 g = 6.02 *10^23 atoms
calculate the number of atomsin 80.45g Mg
Numberof atoms = 6.02*10^23 Mg atoms / 24.31 g * 80.45 g
= 1.99*10^24 atoms
2.1 mol C-12 = 12.01g = 6.02 * 10^23 atoms
calculate the mass using
= 12.01 g C / 6.02*10^23 atoms * 100 atoms
= 1.99 * 10^-21 g
Answer:
2H+(aq) + 20H(aq) → H20(l)
Explanation:
The reaction between sulphuric acid and calcium hydroxide is a neutralization reaction. Neutralization reaction involves the reaction of hydrogen ions and hydroxide ions to form water. This has been shown in the equation.
The number of water molecules formed depends on the number of moles of hydrogen and hydroxide ions present in the compounds. There are two hydrogen ions in sulphuric acid and two hydroxide ions in calcium hydroxide. Hence, two moles of water is formed.