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vlabodo [156]
3 years ago
6

Sort the sentences based on whether they are correct or incorrect.

Chemistry
1 answer:
-Dominant- [34]3 years ago
8 0

Answer:

Explanation:

Correct statements:

Water boils at a temperature below 100°C at higher altitude.

Water boils at a temperature 100°C under normal pressure.

The density of water decreases on freezing.

Water expend on freezing.

False statements:

Water contract on freezing.

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How much do 7.83 × 10^22 molecules of water weigh? Answer in units of g.
____ [38]
<span>The answer I think is, 7.83E22.</span>
4 0
3 years ago
Number of atoms in compound<br><br> Mg(OH)2
Crank

ANSWER

there are 20 number of atoms in compound

Explanation:

In a formula unit of Mg(OH)2, there are one magnesium ion and two hydroxide ions; or one magnesium, two oxygen, and two hydrogen atoms.

3 0
3 years ago
If a metal rod has a density of 7.85 g/cm and a volume of 4 cm, then what is its mass?
Bond [772]

Answer:

<h3>The answer is 31.4 g</h3>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

<h3>mass = Density × volume</h3>

From the question

volume of metal = 4 cm³

density = 7.85 g/cm³

The mass is

mass = 7.85 × 4

We have the final answer as

<h3>31.4 g</h3>

Hope this helps you

8 0
3 years ago
What is the net force acting on an 8-kg mass if it is accelerating at a rate of 5 m/s
klemol [59]

Answer:

I also need help someone answer please?

Explanation:

8 0
3 years ago
What is the total number of nitrogen atoms in two mol of NH4NO3 ?
Fynjy0 [20]

Answer:

2.409 x 10²⁴

Explanation:

There are two nitrogens for every mole of NH₄NO₃

Since there are two moles, that means there are 4 nitrogens

There are 6.022 x 10²³ atoms in every mole of any element

(6.022 x 10²³) x 4 = 2.4088 x 10²⁴

Use sig figs to round it to 2.409 x 10²⁴

7 0
3 years ago
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