3 years ago

How does the density of ice compare with that of liquid water? What evidence can you cite to support your answer?

Chemistry

1 answer:

SpyIntel [72]3 years ago

6 0

Answer: Ice is less dense than water.

Explanation: As water freezes, it expands, making it less dense. This is why ice cubes float in a glass of water.

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5. Which of these elements has the greatest atomic radius? *<br> Be<br> Mg<br> Ra<br> Ba

trapecia [35]

The answer is Ra
Atomic number for Be is 4

Atomic number for Mg 12

Atomic number for Ra 88

Atomic number for Ba 56

5 0

3 years ago

When a saturated solution of NH4Br dissolved in 100 grams of water is cooled from 60°C to 30°C, how much NH4Br will precipitate?

stepladder [879]

Answer:

$m_{precipitated}=24.8g$

Explanation:

Hello,

In this case, since at 60 °C, 108 grams of ammonium bromide are completely dissolved in 100 grams of water for a saturated solution, once it is cooled to 30 °C, wherein only 83.2 grams are completely dissolved in 100 grams of water, the following mass will precipitate:

$m_{precipitated}=108g-83.2g\\\\m_{precipitated}=24.8g$