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Oxana [17]
3 years ago
13

I DON'T UNDERSTAND! PLEASE HELP.

Chemistry
1 answer:
Nookie1986 [14]3 years ago
6 0

Answer:

A would be the lowest, then C, and B would be the highest.

Explanation:

Elements tend to become more reactive as you move down the periodic table. This happens because the atoms become progressively larger and lose their hold on the outer eletrons more easily.

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a sample of the hydrate of sodium carbonate has a mass of 8.85 g. it loses 1.28 g when heated. find the molar ratio of this comp
xenn [34]

Answer:

Molar ratio of the compound is 1:1 and the type of hydrate is Mono hydrate.

Explanation:

From the given,

Mass of sodium carbonate Na_{2}CO_{3}.XH_{2}O = 8.85 g

Loss mass H_{2}O = 1.28 g

Actual weight of sodium carbonate = 8.85 g - 1.28 g = 7.57 g

7.57 g Na_{2}CO_{3} \times \frac{1mol}{106 g} =\frac{0.0714}{0.0714}=1

1.28g H_{2}O \times \frac{1mol}{18 g} =\frac{0.0711}{0.0714}=1

Therefore, the compound has only one water molecule.

Molecular formula of the compound is Na_{2}CO_{3}.H_{2}O an name of the compound is <u>sodium carbonate mono hydrate.</u>

Hence, the type of the compound is Mono hydrate.

8 0
3 years ago
Throughout the reflection, make sure you have a copy of the Student Guide and your data tables. Use the drop-
zalisa [80]

Answer: 1. Mass and type of solution

2. Type of material

3. Temperature

5 0
3 years ago
Read 2 more answers
What percent of earths total volume is the crust
vlada-n [284]

1%

Explanation:

The crust is the thinnest layer of the earth accounting for only 1% total volume of the planets.

Compositionally, the earth is divided into three layers which are the crust, mantle and the core.

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  • The cores accounts for slightly 15% of the volume of the earth. It is the center of our geoid shaped earth. It is rich in iron and nickel metals.

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The less buoyant oceanic plate sinks and slides under the continental plate
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What elements are in nickel oxide
shepuryov [24]

nickel oxide is the chemical compound with a formula called NiO.

what are the elements in nickel oxide?

there is <span><span>a silver looking white crystalline metal that takes place in meteors also combined with other elements in ores.</span>
</span>

4 0
4 years ago
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