3 years ago

Which one is an accurate description of an erosion?

Chemistry

1 answer:

Sergeeva-Olga [200]3 years ago

6 0

the process of eroding or being eroded by wind, water, or other natural agents

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15. If the moon is 384,400km away. Does it take more than a second for light to travel from the Earth to the moon?

marishachu [46]

Answer:

Yes

Explanation:

The speed of light is about 300 000 km per second, so light takes about 1.28 seconds to travel from the Moon to the Earth.

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1 year ago

Using off-road vehicles does not contribute to the process of erosion. true or false

Artemon [7]

Using off road vehicles does help contribute to the process of erosion.

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3 years ago

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As a bond netween a hydrohen atom and sulfur atom is formed, electrons are

aleksley [76]

shared to form an ionic bond.

I hope this helps!

7 0

3 years ago

If you know the poh of a solution how can you determine its ph

Sati [7]

POH+pH=14,
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pH=14-pOH

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3 years ago

The solubility of oxygen gas in water at 40 ∘c is 1.0 mmol/l of solution. What is this concentration in units of mole fraction?

juin [17]

The formula for mole fraction is:

$mole fraction of solute = \frac{number of moles of solute}{total number of moles of solution}$ -(1)

The solubility of oxygen gas = 1.0 mmol/L (given)

1.0 mmol/L means 1.0 mmol are present in 1 L.

Converting mmol to mol:

$1.00 mmol\times \frac{1 mol}{1000 mmol} = 0.001 mol$

So, moles of oxygen = 0.001 mol

For moles of water:

1 L of water = 1000 mL of water

Since, the density of water is 1.0 g/mL.

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

$Mass = 1.0 g/ml\times 1000 mL = 1000 g$

So, the mass of water is 1000 g.

Molar mass of water = 18 g/mol.

Number of moles of water = $\frac{1000 g}{18 g/mol} = 55.55 mol$

Substituting the values in formula (1):

$mole fraction = \frac{0.001}{55.55+0.001}$

$mole fraction = 1.8\times 10^{-5}$

Hence, the mole fraction is $1.8\times 10^{-5}$ .

7 0

3 years ago