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katovenus [111]
3 years ago
7

Help ASAP I will mark brainliest to he correct answer

Chemistry
1 answer:
irga5000 [103]3 years ago
8 0

Answer:

513.3 km/h

Explanation:

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describe in general terms an experiment to determine the molal freezing point depression constant kf of water. Assume the availa
Dvinal [7]
A solution (in this experiment solution of NaNO₃) freezes at a lower temperature than does the pure solvent (deionized water). The higher the solute concentration (sodium nitrate), freezing point depression of the solution will be greater.
Equation describing the change in freezing point: 
ΔT = Kf · b · i.
ΔT - temperature change from pure solvent to solution.
Kf - the molal freezing point depression constant.
b -  molality (moles of solute per kilogram of solvent).
i - Van’t Hoff Factor.
First measure freezing point of pure solvent (deionized water). Than make solutions of NaNO₃ with different molality and measure separately their freezing points. Use equation to calculate Kf.

6 0
3 years ago
N2 + 3 H2 → 2 NH3
sweet [91]

Answer:

B

Explanation:

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Kostya randomly chooses a number from 1 to 10. What is the probability he chooses a number less than 5?
Ghella [55]
A. 1/2

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3 0
3 years ago
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Which of the following bases can remove a proton from formic acid in a reaction that favors products?
Debora [2.8K]
Hydroxide ion is a strong  and would react with H+ to form water 

OH-+H+---->H2O
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The density of aluminum is 2.70 g/cm'. If the volume of a piece of aluminum is 90.4 cm', what is
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33.4814814815

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