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Korvikt [17]
3 years ago
14

19 The coefficients in a balanced chemical equation represent(l ) the mass ratios of the substances in the reaction(2) the mole

ratios of the substances in the reaction(3) the total number of electrons in the reaction
(4) the total number of elements in the reaction
Chemistry
1 answer:
Andrews [41]3 years ago
8 0
2. The coefficients represent to molar ratios in a balanced equation.
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A sample of 250 g of water are heated from 40°C to 121°C, calculate the amount of heat energy absorbed.
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Answer:

the anwser isn't in the choices

Explanation:

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Consider n2 (g) + 3h2 (g) →→ 2nh3 (g). what is the mass of nitrogen gas required to react with 0.129 g h2?
Flura [38]
The given chemical reaction given above is already balanced such that the number of atoms in the left hand side of the equation is equal to that of the right hand side. Using the dimensional analysis, proper conversion factors and the molar masses,

                    mass of nitrogen = (0.129 g H₂)(1 mol H₂/2 g H₂)(1 mol N₂/3 mol H₂)(28 g N₂/1 mol N₂)
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Therefore, 0.602 g of nitrogen will be required for he reaction. 
6 0
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