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MariettaO [177]
2 years ago
15

This graduated cylinder has numbers representing milliliters. A student says that the volume of the liquid inside is 21.8 millil

iters.
What best explains why the student is wrong?

21.8 is at the top of the meniscus, but volume should be measured in the middle of the meniscus.
21.8 is at the top of the meniscus, but volume should be measured at the bottom of the meniscus.
Since the lines are only marked with whole numbers, the student must round to a whole number.
Since the whole numbers represent milliliters, the student must use a unit smaller than milliliters.
Chemistry
1 answer:
Eddi Din [679]2 years ago
3 0

Answer:

The answer for this question depends on the type of meniscus in the cylinder. If it is an upright meniscus like in water, the reading should be taken at the bottom of the meniscus. However if it is an inverted meniscus like in mercury, the reading should be taken at the top of the meniscus.

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8 0
3 years ago
What is the advantage of seeds that can be spread over a wide area?
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Explanation:

As it is given that solubility of water in diethyl ether is 1.468 %. This means that in 100 ml saturated solution water present is 1.468 ml.

Hence, amount of diethyl ether present will be calculated as follows.

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So, it means that 98.532 ml of diethyl ether can dissolve 1.468 ml of water.

Hence, 23 ml of diethyl ether can dissolve the amount of water will be calculated as follows.

          Amount of water = \frac{1.468 ml \times 23 ml}{98.532 ml}

                                       = 0.3427 ml

Now, when magnesium dissolves in water then the reaction will be as follows.

                Mg + H_{2}O \rightarrow Mg(OH)_{2}

Molar mass of Mg = 24.305 g

Molar mass of H_{2}O = 18 g

Therefore, amount of magnesium present in 0.3427 ml of water is calculated as follows.

           Amount of Mg = \frac{24.305 g \times 0.3427 ml}{18 g}  

                                    = 0.462 g

   

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3 years ago
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