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xeze [42]
2 years ago
6

Students in a science classroom were given two vials. One vial contained a mixture and the other vial contained a pure substance

. What is the main difference between a mixture and a pure substance.
Chemistry
1 answer:
Blizzard [7]2 years ago
3 0
<span>A pure substance contains only one kind of molecule, and a mixture is a combination of two or more pure substances.</span>
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D. Liquid chromatography
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3 years ago
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What is the mole fraction of ethanol in a mixture of 0.25 mol of ethanol and 0.4 mol of methanol? Report your answer to the hund
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Answer:

0.3846

Explanation:

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6 0
3 years ago
What is the empirical formula of a compound that contains 75% Ag and 25% Cl by mass
lesya [120]

Answer:

The answer to your question is     AgCl

Explanation:

Data

Silver = Ag = 75%

Chlorine = Cl = 25%

1.- Convert percent numbers to grams

Silver = 75 g

Chlorine = 25 g

2.- Calculate the moles of each element

Mass number Ag = 108 g

Mass number Cl = 35.5 g

                            108 g of Ag ------------------  1 mol

                              75 g of Ag ------------------   x

                                x = (75 x 1) / 108

                                x = 75 / 108

                                x = 0.69 moles

                            35.5 g of Cl ------------------ 1 mol

                             25 g of Cl    -----------------   x

                                    x = (25 x 1) / 35.5

                                    x = 0.70 moles

3.- Divide by the lowest number of moles

Ag = 0.69/0.69 = 1

Cl = 0.70 / 0.69 = 1.02 ≈ 1

4.- Write the empirical formula

                                                 Ag₁ Cl₁  = AgCl

5 0
2 years ago
How many significant figures are in measurement 0.00304kg
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Significant figures are numbers that are not 0s, but they are included if they are between two numbers:
There are three significant figures, 304

Hope this helps! :)
6 0
3 years ago
A student is performing experiments on a particular substance. Which
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Explanation:

it reacts with acid .......

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3 years ago
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