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sladkih [1.3K]
3 years ago
10

Plz help ASAP Thx sm

Chemistry
2 answers:
bezimeni [28]3 years ago
8 0

Answer:

B

Explanation:

Mashutka [201]3 years ago
6 0

Answer:

The answer is B!

Explanation:

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Three samples of a solid substance composed of elements A and Z were prepared. The first contained 4.31 g A and 7.70 g Z. The se
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Answer:

The percentage composition of the elements of the compound in the three samples is the same.

Explanation:

<em>The law of definite proportions states that all pure samples of a particular chemical compound contain the same elements in the same proportion by mass.</em>

Sample A:

Mass of A = 4.31 g; mass of Z = 7.70 g

Total mass of sample = 12.01

Percentage mass of A in the sample = (4.31 * 100)/12.01 = 35.9 %

Percentage mass of Z in the sample = (7.70 * 100)/12.01 = 64.1 %

Sample B:

Percentage mass of A in the sample = 35.9 %

Percentage mass of Z in the sample = 64.1 %

Sample C:

Mass of A = 0.718 g; Total mass of sample = 2.00 g

mass of Z = mass of sample - mass of A = 2.00 g - 0.718 g = 1.282 g

Percentage mass of A in the sample = (0.718 * 100)/2.00 = 35.9 %

Percentage mass of Z in the sample = (1.282 * 100)/2.00 = 64.1 %

From the calculations, it can be seen that the percentage composition of the elements in the compound is the same for the three samples.

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Subscripts in chemical formulas are used to indicate the relative proportions of the elements in a
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relative proportions of the elements in a chemical reaction

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Recall the formula of glucose is c 6 h 12 o 6 . how many carbon, oxygen, and hydrogen atoms will you need for three glucose mole
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Suppose you were given a substance and asked to determine weather or not it was a plasma. Write the characteristics you would lo
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The features of plasma are substantially distinct from those of the usual neutral gases so that plasmas are regarded as a different fourth state of matter.  


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What did the cathode ray discover??
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Electrons were discovered by cathode ray
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