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alukav5142 [94]
2 years ago
9

Slope is rise/run. Into this graph (mass vs volume), what does the slope represent?

Chemistry
2 answers:
umka2103 [35]2 years ago
8 0

Answer:

mass/volume

Explanation:

The slope is rise over run, or y over x.  The mass is y on this graph, and the volume is x on this graph.  The slope represents mass over volume.

REY [17]2 years ago
6 0
Slope resprents slope/Volume
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True/False 1,atoms combines to form element 2, a physical changes is a change in the composition of as substance 3, physical pro
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How many number of moles are present in 200. g of sodium bicarbonate (NaHCO3)
nikdorinn [45]

You can solve this problem through dimensional analysis.

First, find the molar mass of NaHCO3.

Na = 22.99 g

H = 1.008 g

C = 12.01 g

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Now, add them all together, you end with with the molar mass of NaHCO3.

22.99 + 1.008 + 12.01 + 16(3) = 84.008 g NaHCO3. This number means that for every mole of NaHCO3, there is 84.008 g NaHCO3. In simpler terms, 1 mole NaHCO3 = 84.008 g NaHCO3.

After finding the molar mass of sodium bicarbonate, now you can use dimensional analysis to solve for the number of moles present in 200. g of sodium bicarbonate.

200. g NaHCO_3 * \frac{1 mole NaHCO_3}{84.008 g NaHCO_3}

Cross out the repeating units which are g NaHCO3, and the remaining unit is mole NaHCO3

200.  * 1 = 200

200/ 84.008 = 2.38

Notice how there are only 3 sig figs in the answer. This is because the given problem only gave three sig figs.

Your final answer is 2.38 mol NaHCO3.

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