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3 years ago

Catherine has some seawater. She wants to separate pure water from the seawater.

2 answers:

8 0

Answer:

water can be separated from salt solution by simple distillation. This method works because water has a much lower boiling point than salt. When the solution is heated, the water evaporates. It is then cooled and condensed into a separate container.

This can be distillation/evaporation.

expeople1 [14]3 years ago

4 0

Answer:

the change is evaporation

Explanation:

the water heats up at the surface of the water and evaporates

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An atom of argon in the ground state tends not to bond with an atom of a different element because the argon atom has (a)a total

Dvinal [7]

The answer is a total of eight valence electrons
hope this help

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3 years ago

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Mr. Smith is hyperglycemic with a blood glucose level of 300mg/ml of blood. Explain how homeostasis would regulate his glucose l

aleksley [76]

Answer:

When the animal has eaten food and the blood glucose level in the body increases. The pancreas cells in the body detects the increase in the blood glucose which leads to increase the insulin hormone.

This decreases the blood glucose level in the level. This is how the negative feedback works in the body if the level of glucose increases.

Negative feedback is the way by which the body maintains homeostasis and maintains equilibrium in the body.

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3 years ago

Write a balanced equation for the following:

Ket [755]

(ANS1)— P4 + 5O2 ---> 2P2O5

(ANS2)— C3H8 + 5O2---> 3CO2 + 4H20

(ANS3)— Ca2Si + 4Cl2 ---> 2CaCl2 + SiCl4

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3 years ago

Why does the TLC tank need to be covered?

photoshop1234 [79]

Answer:

The reason for covering the container is to make sure that the atmosphere in the beaker is saturated with solvent vapour. Saturating the atmosphere in the beaker with vapour stops the solvent from evaporating as it rises up the paper.

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3 years ago

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A 1.0 mol sample of which of the following compounds has the greatest mass?

Sholpan [36]

Answer:

D) N2O5

Explanation:

The molar mass of a substance is defined as the mass of this substance in 1 mol. To solve this question we must find the molar mass of each option:

Molar mass NO:

1N = 14g/mol*1

1O = 16g/mol*1

14+16 = 30g/mol

Molar mass NO2:

1N = 14g/mol*1

2O = 16g/mol*2

14+32 = 46g/mol

Molar mass N2O:

2N = 14g/mol*2

1O = 16g/mol*1

28+16 = 44g/mol

Molar mass N2O5:

2N = 14g/mol*2

5O = 16g/mol*5

28+80 = 108g/mol

That means the compound with the greatest mass is:

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3 years ago