Answer:
0.027×10²³ atoms of H
Explanation:
Given data:
Mass of phosphoric acid = 0.1488 g
Number of hydrogen atoms = ?
Solution:
First of all we will calculate the number of moles of H₃PO₄.
Number of moles = mass/molar mass
Number of moles = 0.1488 g/ 98 g/mol
Number of moles = 0.0015 mol
1 mole of H₃PO₄ contain = 3 mol of H
0.0015 mol× 3= 0.0045 mol
Now we will calculate the number H atoms.
1 mole = 6.022×10²³ atoms
0.0045 mol×6.022×10²³ atoms / 1 mol
0.027×10²³ atoms of H
The answer would look something like this. (sorry for the ugliest diagram ever.)
First, we convert the given amount of energy into joules.
1 kJ = 1000 joules
2.2125 kJ = 2,212.5 Joules
Each kilocalorie contains 4,184 Joules
Kilocalories = 2,212.5 / 4,182
Kilocalories = 0.529
1 kilocalorie = 1000 calories
0.529 kilocalories = 529 calories
The acid and alkali that would react to make sodium sulfate is
alkali= sodium hydroxide
acid = sulphuric acid
<u><em>explanation</em></u>
Acid react react with alkali to form salt and water.
For sodium sulfate salt to be formed a sulfate acid is required to react with a hydroxide of sodium .
therefore Sodium hydroxide (alkali) react with sulphuric acid (an acid) to form sodium sulfate (salt) and water.