Sara measured the amount of potassium nitrate (kno3) that could be dissolved in 100 grams of water at different temperatures. she repeated the test five times. the data from sara's experiment is listed in the table below.
temperature mass of kno3 in 100 g water average mass
kno3
trial 1 trial 2 trial 3 trial 4 trial 5
0°c 12.8 g 12.9 g 13.2 g 12.7 g 13.1 g 12.9 g
20°c 31.9 g 32.1 g 32.3 g 31.8 g 31.7 g 32.0 g
40°c 62.8 g 64.3 g 64.1 g 63.8 g 64.5 g 63.9 g
60°c 108.6 g 111.4 g 111.1 g 109.7 g 109.2 g 110.0 g
80°c 168.9 g 169.9 g 169.2 g 168.4 g 167.1 g 168.7 g
which of the following is the best inference sara could make based on her data?
a.
there is not enough information provided to make any inferences about the solubility of kno3.
b.
temperature has no effect on the amount of kno3 that can dissolve in water.
c.
the amount of kno3 that can dissolve in water increases as temperature increases.
d.
the addition of kno3 causes the temperature of the water to increase.
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Ответ:
A
Explanation: The amount of KNO3 that can dissolve in water increases as temperature increases
Ответ:
C
Collision theory states that when suitable particles of the reactant hit each other, only a certain amount of collisions result in a perceptible or notable change.