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mixas84 [53]
2 years ago
9

What is the molarity of a 0.250 L MgCl2 solution that contains 0.175 mol MgCl2?

Chemistry
1 answer:
spayn [35]2 years ago
4 0

Explanation:

we know that 0.250 L = 0.250 dm3

molarity = concentration in dm3/ volume

molarity = 0.175/0.250 = 0.7 mol/dm3

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Answer:

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Which of the following is not a clue that a chemical reaction has taken place? *
DaniilM [7]

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Explanation:

No colour change recorded, only change of state, hence this is a physical change - physical changes I.e. change of state and temperature are not chemical reactions.

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This is for a study guide for my semester final, and I have no clue how to answer this, please help, and please at least try to
user100 [1]

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eg:

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7 0
3 years ago
In a reaction of a potential new fuel, it is found that when 2.81 moles of the fuel combusts, 1,612 kJ of energy is released. Wh
Tema [17]

Answer:

-573.67

Explanation:

whenever energy is released in a chemical reaction, we would then expect the delta H of the reaction to be negative because the reaction is an exothermic reaction.

now we have that 2.81 moles of fuel when it combusts would releases 1612kJ of energy

thus, 1 mole will release 1612/2.81 = -573.67kJ of heat

Therefore the delta H of the reaction = -573.67 kJ/mol

3 0
3 years ago
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4 0
3 years ago
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