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4 years ago

Please help me This is worth 30 points of my grade.

Chemistry

2 answers:

KengaRu [80]4 years ago

5 0

It could also be the tech tonic plates

sertanlavr [38]4 years ago

4 0

The correct theory is that the way gravity is pushing them into the middle of earth which makes them the way they are

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What does the constant bombardment of gas molecules against the inside walls of a container produce?

Bas_tet [7]

Pressure since pressure is defined as force per unit area and the molecules exert a force on the walls of the container when they bombard it

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3 years ago

The solubility of nitrogen gas at 25°C and a nitrogen pressure of 522 mmHg is 4.7 × 10 –4 mol/L. What is the value of the Henry'

Anestetic [448]

Answer:

6.8 × 10⁻⁴ mol/L.atm

Explanation:

Step 1: Given data

Solubility of nitrogen gas at 25°C (S): 4.7 × 10⁻⁴ mol/L

Partial pressure of nitrogen gas (P): 522 mmHg

Step 2: Convert the partial pressure of nitrogen to atm

We will use the relationship 1 atm = 760 mmHg.

$522mmHg \times \frac{1atm}{760mmHg} = 0.687atm$

Step 3: Calculate the value of the Henry's Law constant (k)

We will use Henry's law.

$S = k \times P\\k = \frac{S}{P} = \frac{4.7 \times 10^{-4}mol/L }{0.687atm} = 6.8 \times 10^{-4} mol/L.atm$

3 0

4 years ago

Why did the rock collector like his collection of metamorphic rocks so much?

sdas [7]

Explanation:

ABC looks like the metamorphic rocks are more usable than other rocks

4 0

3 years ago

The first method of determining the chemical composition of substances in space was to _____.

Art [367]

Answer:The first method to determine the chemical composition of a substance in space was using light. By determining red shift in the observed spectrum of light they could determine the elements they were observing

Explanation:

5 0

3 years ago

You are in space and running out of water. You do have a great deal of magnesium carbonate pentahydrate. It is possible to extra

lana [24]

Answer:

51.65%

Explanation:

Magnesium carbonate pentahydrate is $MgCO_3.5H_2O$

1 mole of the compound contains 5 moles of water. The water can be extracted by heating the the compound and allowing the water to condense.

$MgCO_3.5H_2O --> MgCO_3 + 5H_2O$

1 mole of the compound contains 5 moles of water molecule

mole = mass/molar mass

1 mole of the compound weighs: 1 x 174.3903 = 174.3903 g

5 moles of water weighs: 5 x 18.01528 = 90.0764 g

Percentage by mass of hydrate in magnesium carbonate pentahydrate

= 90.0764/174.3903 x 100%

= 51.65%

8 0

3 years ago