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Nutka1998 [239]
3 years ago
14

When we reverse a chemical equation,we multiply it's delta H value by

Chemistry
1 answer:
Illusion [34]3 years ago
7 0
Delta H is negated. Multiply by -1
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After an hour in the cooler the sodas get colder and the ice gets warmer. Which of the following explains these changes correctl
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Because it’s called heat changes it and melts the ice
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3 years ago
With regard to wind, describe the time of day that an early explorer might have planned to enter a harbor and when he might have
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3 0
3 years ago
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Molecules can be dissolved? Why?
elixir [45]

Answer:

Dissolving is when the solute breaks up from a larger crystal of molecules into much smaller groups or individual molecules. This break up is caused by coming into contact with the solvent. In the case of salt water, the water molecules break off salt molecules from the larger crystal lattice.

Explanation:

4 0
2 years ago
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A 4.305-g sample of a nonelectrolyte is dissolved in 105 g of water. the solution freezes at -1.23c. calculate the molar mass of
amid [387]
The answer is 62.00 g/mol. 
Solution: 
Knowing that the freezing point of water is 0°C, temperature change Δt is 
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Since the van 't Hoff factor i is essentially 1 for non-electrolytes dissolved in water, we calculate for the number of moles x of the compound dissolved from the equation 
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     x = 0.069435 mol 
Therefore, the molar mass of the solute is  
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6 0
3 years ago
What does the atomic weight of an element represent
Marrrta [24]

The nuclei of atoms also contain neutrons, which help hold the nucleus together. ... The total weight of an atom is called the atomic weight. It is approximately equal to the number of protons and neutrons, with a little extra added by the electrons.


The mass of a given atom, measured on a scale in which the hydrogen atom has the weight of one. Because most of the mass in an atom is in the nucleus, and each proton and neutron has an atomic weight near one, the atomic weight is very nearly equal to the number of protons and neutrons in the nucleus.

7 0
3 years ago
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