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Thepotemich [5.8K]
3 years ago
14

Look at this picture of carbon dioxide. What are the things in the picture? Check all that apply.

Chemistry
1 answer:
zysi [14]3 years ago
3 0

Answer:

where is the picture?

Explanation:

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Potassium fluoride (KF, a salt, has a molecular weight of 58.10 grams. How many grams would be needed to make 1.0 liter of 5.0 m
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The concentration of the solution is 5.0 molar, which is 5.0 mole/L.  So in the 1.0 L of 5.0 molar KF salt solution, the moles of KF is 5.0molar*1.0L=5.0 mole. The molecular weight of KF is given in the question as 58.10 gram/mole, so the grams of KF is 58.10 gram/mole * 5.0 mole = 290.5 gram.
3 0
3 years ago
Morgan did an experiment to see the effect of water temperature on the rate at which sugar dissolves. She placed a sugar cube in
Dominik [7]

Answer:

B is correct → since temperature can be measured confidently and the variations with temperature are greater ( then the errors in measuring time diminishes)

Explanation:

A is not correct → since the sugar cubes will be still surrounded by water at the temperature chosen regardless of the size of the glass, organising the data by size of the glass is not correct since the glass size does not affect in a significant way to the results ( it could affect the cooling rate of water due to the exposed surface , it but would be insignificant)  

C is not correct → since the sugar cubes are approximately of the same size , putting 2 cubes or "n" cubes will not affect the time significantly since each cube is still surrounded by water at the same temperature and behaves independently from others , then each cube dissolves at the same time ( there would be small variations due to the different sizes of the cubes and the small variation due to the limited mass of water)

D is not correct → since the solubility of sugar in water is high , the amount left after the experiment would be very small ( thus the relative errors are high) and the sugar would be contaminated with water in the weighting operation, leading to more errors

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