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4 years ago

Help please!!!!!! Need answer!

Chemistry

2 answers:

IrinaK [193]4 years ago

7 0

The answer is D . It is used by crabs to generate energy

Rufina [12.5K]4 years ago

5 0

Answer: D. It is used by crabs to generate energy

Explanation: When a whale dies, it becomes dead animal material. The food web shows that crabs consume dead animal material.

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The law of conservation of mass states that mass cannot be created nor

Svetlanka [38]

Answer:

This is true.

Explanation:

The law of conservation of mass says that mass cannot be made or removed.

7 0

3 years ago

Which is not a hydrogenous sediment?

vodka [1.7K]

I believe Calcareous is not a hydrogenous sediment. Hydrogenous sediments are example of marine sediments that are formed directly from chemical processes in sea water. They include, manganese nodules, phophorites, metal sulfides, evaporites and carrbonates. In shallower areas, such as on continental shelves and near islands, rock salt, calcium salts and sulfates may settle on the ocean floor.

4 0

4 years ago

Read 2 more answers

Mass = 100g, volume=20ml, what is density?

Nonamiya [84]

Answer:

<h3>The answer is 5.0 g/mL</h3>

Explanation:

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

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

From the question

mass = 100 g

volume = 20 mL

So we have

$density = \frac{100}{20} \\$

We have the final answer as

Hope this helps you

4 0

3 years ago

HELP ASAP 20 POINTS

Colt1911 [192]

Solubility of a compound in water can be referred to as the amount of the compound that can be dissolved in 1 L of the solvent (water) at any given temperature. Solubility of a compound can be expressed in the units of g/L or mg/L.

Given that the solubility of calcium carbonate in water = 14 mg/L

We have to calculate the volume of water that can dissolve 11 g of calcium carbonate.

Converting 11 g calcium carbonate to mg:

$11g *\frac{1000mg}{1g} =11,000 mg$

Volume of water that would dissolve 11000 mg calcium carbonate

= $11000 mg CaCO_{3}*\frac{1L}{14 mg}$

=785.7 L

Rounding the volume 785.7 L to two significant figures, we get 790 L water.

Therefore, we would need 790 L water to completely dissolve 11 g of calcium carbonate.

4 0

3 years ago

What is Hydrogen carbons?

melisa1 [442]

Answer:

An organic chemical compound consisting solely of hydrogen and carbon atoms is a hydrocarbon. Hydrocarbons are compounds that occur naturally and form the basis of crude oil , natural gas, coal and other significant sources of energy.

3 0

3 years ago