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stich3 [128]
3 years ago
9

How do you know a physical change has occurred when evaporating water produces gaseous water?

Chemistry
1 answer:
levacccp [35]3 years ago
6 0

Answer:

Its b its the state not anything else

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What would happen if hydrogen and nitrogen combine?
Tanzania [10]
<span>At room temperature and atmospheric pressure, nothing happens when the two gasses are mixed. However, at high temperature and pressure (450C, 200atm), in the presence of an iron oxide catalyst, the production of ammonia is thermodynamically advantageous.</span>
5 0
3 years ago
Which is a characteristic of weak acids and weak bases?
Lera25 [3.4K]
Ka and Kb values of weak acids and weak bases are small.

This is because weak acids and weak bases do not dissociate completely, favoring the reactants more than dissociating into the product of H+ or OH-.
5 0
3 years ago
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Consider the following equilibrium between N2O4 and NO2.[Heat is added to a brown 2 NO2 gas to yield a colorless N2O4 gas]Which
LekaFEV [45]

Answer:

a.Low temperature

Explanation

Equation of reaction:

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To cause the reaction to become darker brown means to produce more of NO2 gas. That is backward reaction.

Since the reaction is endothermic, decrease in temperature will shift the equilibrium position to the left thereby favouring backward reaction. This is in line with Me Chatelier's principle.

High pressure will rather favour forward reaction (it is not the right option).

7 0
3 years ago
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An unknown atom has 5
labwork [276]

Answer:

17

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the atomic mass is away protons + neutrons, electrons are neglatable.

7 0
3 years ago
True or false: Observing a physical property of a substance will change the substances' identity I NEEED HELLLPPPPP NOOOWWWW !!!
andrew11 [14]

Answer:

false

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a physical property can be observed and stay the same but a chemical property can't

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