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shepuryov [24]
3 years ago
7

A block with a mass of 10g is dropped into a graduated cylinder with 20 mL of water. The water rises to 25 mL. What is the densi

ty of the rock?
Chemistry
1 answer:
Alex_Xolod [135]3 years ago
6 0

Answer:

The answer is

<h2>2.0 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question

mass of block = 10 g

volume = final volume of water - initial volume of water

volume = 25 - 20 = 5

volume = 5 mL

The density of the block is

density =  \frac{10}{5}  \\

We have the final answer as

<h3>2.0 g/mL</h3>

Hope this helps you

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A 72.0 mL aliquot of a 1.40 M solution is diluted to a total volume of 248 mL. A 124 mL portion of that solution is diluted by a
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Explanation:

According to the dilution law,

M_1V_1=M_2V_2

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Now 124 mL portion of this prepared solution is diluted by adding 133 mL of water.

According to the dilution law,

M_1V_1=M_2V_2

where,

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V_1 = volume of stock solution = 124 ml

M_2 = molarity of diluted solution = m

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0.41\times 124=m\times 257

m=0.20M

Thus the final concentration of the solution is 0.20 M.

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D

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