2 years ago

True or False

Chemistry

1 answer:

Deffense [45]2 years ago

7 0

The answer is true that they have equal mases.

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Which of the following observations is usually not evidence of a chemical change ?

Nookie1986 [14]

Answer:

Explanation:

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3 years ago

An element has three different isotopes. One has a mass of 35.00 amu; another has a mass of 36.00 amu; and another has a mass of

yulyashka [42]

Answer:

so 35+38+36÷3= 109÷3 =36.33 AMU

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2 years ago

Which represents the correct equilibrium constant expression for the reaction below?

zubka84 [21]

K(eq) = concentration of products/concentration of reactant
= [Cu+2] / [Ag+]^2

Activity of pure solid and liquid is taken as 1.

Hence last option is correct.

Hope this helps, have a great day ahead!

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2 years ago

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Calculate the percentage by mass of oxygen in Al2(SO4)3 (Al=27, S=32,O= 16) PLEASE SHOW FULL WORKING

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Answer:

There is 61.538% oxygen in Al2(SO4)3.

Explanation:

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Thus, percent of oxygen = Wt of oxygen/total Wt. Of compound *100

= 192/312 * 100=61.538 %

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3 years ago

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A speaker conntected to an MP3 player converts electrical energy into sound energy.according to the law of conversation of energ

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Answer:

Explanation:

The law of conservation clearly states that energy can neither be created nor destroyed

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