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pashok25 [27]
3 years ago
13

Which of the following is the best definition of a physical change?

Chemistry
2 answers:
Eddi Din [679]3 years ago
8 0
You’re best choice is B
ELEN [110]3 years ago
7 0
I think answer is

C. Something that can be observed or measured while changing the identity of the substance
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What volume of a 2.25 M sodium chloride solution will contain 4.58 moles of sodium chloride
Rzqust [24]

Answer:

Option E. 2.04 L

Explanation:

Data obtained from the question include:

Molarity of NaCl = 2.25 M

Mole of NaCl = 4.58 moles

Volume =..?

Molarity is simply defined as the mole of solute per unit litre of the solution. It is represented mathematically as:

Molarity = mole /Volume

With the above formula, we can obtain the volume of the solution as follow:

Molarity = mole /Volume

2.25 = 4.58/volume

Cross multiply

2.25 x volume = 4.58

Divide both side by 2.25

Volume = 4.58/2.25

Volume = 2.04 L

Therefore, the volume of the solution is 2.04 L

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3 years ago
The amount of heat absorbed when 5.5g of aluminum is heated from 25.0c to 95.0c the specific heat of aluminum is 0.897J/(gc)​
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Answer:

Q=21.99 kJ

Explanation:

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Is salinity higher or lower near ice? EXPLAIN!
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When salt is ejected in the ocean as sea forms, the waters salinity increases because salt water is heavier so it’s lower
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How many grams of Li are there in 1.39 moles of Li?
Ulleksa [173]

Answer:

6.941 grams

Explanation:

The molecular formula for Lithium is Li. The Si base unit for amount of substance is mole. 1 mole is equal to 1 moles Lithium, or 6.941 grams

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