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SCORPION-xisa [38]
3 years ago
12

The rays of the sun strike the Earth less directly during winter in the Northern Hemisphere?

Chemistry
1 answer:
noname [10]3 years ago
8 0
The sun's rays hit the Earth at a extreme angle,  which causes the days to become shorter, so yes, the sun's rays do hit the Earth at a extreme angle.
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What is the molar mass of citric acid (C6H8O7) and baking soda (NaHCO3)?
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1. 192.0 g/mol.

2. 84.0 g/mol.

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  • <em>The molar mass is the mass of all the atoms in a molecule in grams per mole.</em>
  • <em>To calculate the molar mass of a molecule, we first obtain the atomic weights from the individual elements in a periodic table. We then count the number of atoms and multiply it by the individual atomic masses.</em>

<em></em>

<em>1. Molar mass of citric acid (C₆H₈O₇):</em>

<em>Molar mass of C₆H₈O₇ = 6(atomic mass of C) + 8(atomic mass of H) + 7(atomic mass of O)</em> = 6(12.0 g/mol) + 8(1.0 g/mol) + 7(16.0 g/mol) = <em>192.0 g/mol.</em>

<em>2. Molar mass of baking soda (NaHCO₃):</em>

<em>Molar mass of NaHCO₃ = (atomic mass of Na) + (atomic mass of H) + (atomic mass of C) + 3(atomic mass of O) </em>= (23.0 g/mol) + (1.0 g/mol) + (12.0 g/mol) + 3(16.0 g/mol) = <em>84.0 g/mol.</em>

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