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Dimas [21]
2 years ago
10

Mass=35g, density=5g/cm3. what is the volume?

Chemistry
1 answer:
nevsk [136]2 years ago
8 0

Answer:

7 cm^3

Explanation:

Density = Mass/Volume

5 = 35/x

multiply both sides by x to get

5x = 35

then divide by 5

so x = 7 cm^3

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Answer:

219.78 mL of the stock solution are needed

Explanation:

First, we take a look at the desired Al2(SO4)3 working solution. We are told that the we need 400 mL of an aqueous aluminum sulfate solution 1.0 M. Let's see how many moles of the compound we have in the desired volume:

1000 mL Al2(SO4)3 solution ----- 1 mole of Al2(SO4)3

400 mL Al2(SO4)3 solution ----- x = 0.4 moles of Al2(SO4)3

To reach the desired concentration in the working solution we need 0.4 moles of Al2(SO4)3 in 400 mL, so we calculate the volume of the stock solution needed to prepare the working solution:

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1.82 moles of Al2(SO4)3 ----- 1000 mL

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So, if we take 219.78 mL of the 1.82 M stock solution, we put it in a graduated cylinder and we dilute it to 400 mL, we would obtain a 1.0 M Al2(SO4)3 solution.

4 0
3 years ago
Read 2 more answers
On a caterpillar's map, all distances are marked in millimeters. The caterpillar's map shows that the distance between two milkw
pychu [463]

Answer:

0.004012km

Explanation:

Problem:

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Here, we are converting from a submultiple unit to a multiple unit.

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Now, we must find how many exponents will take us from 10⁻³ to  10³

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Therefore,

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When you boil water, you aren't changing the elements. You're just making water vapor. However, when you burn paper, it becomes carbon (mostly). So physical changes will not change the substance, only chemical changes will.
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