True:
They are Nobel gassed! They are un-reactive because there outer shell (valence) is completely full. This means they do not want to lose or gain on electron so they do not react.
Answer:
Whereas solar energy makes use of the sun to generate energy, geothermal energy makes use of the heat that is trapped deep in the center of the earth. The magma buried deep down of our soil is as hot as the sun’s surface, and some of that heat manages to escape outward. When that happens, we can harness that said heat for energy.
Explanation:
Answer:
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Explanation:
Answer:
Base Mg(OH)2 does neutralise the acid and is 12g in excess.
Explanation:
2HCL +Mg(OH)2 -> MgCl2 + 2H20
2 * 36.458 g of HCL react with 58.319 g of Mg(OH)2 to neutralise it.
72.916 HCl reacts with 58.319 g of the base.
So 20 g HCl reacts with (58.319/72.916) * 20 = 16g.
There are 28 g of Mg(OH)2 so the base does neutralise all the acid.
The Mg(OH)2 is 28 - 16 = 12 g in excess.
Answer:
Number of moles = 0.35 mol
Explanation:
Given data:
Mass of H₂SO₄ = 34.6 g
Number of moles = ?
Solution:
Formula:
Number of moles = mass/molar mass
Molar mass of H₂SO₄ = 98.1 g/mol
by putting values,
Number of moles = 34.6 g/ 98.1 g/mol
Number of moles = 0.35 mol
