Which organelle in cytoplasm is responsible for carrying hereditary information?
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A) 10.75 is the concentration of arsenic in the sample in parts per billion .
B) 7,633.66 kg the total mass of arsenic in the lake that the company have to remove.
C)It will take 1.37 years to remove all of the arsenic from the lake.
Explanation:
A) Mass of arsenic in lake water sample = 164.5 ng
The ppb is the amount of solute (in micrograms) present in kilogram of a solvent. It is also known as parts-per million.
To calculate the ppm of oxygen in sea water, we use the equation:
Both the masses are in grams.
We are given:
Mass of arsenic = 164.5 ng =
Volume of the sample = V =
Density of the lake water sample ,d=
Mass of sample = M =
10.75 is the concentration of arsenic in the sample in parts per billion.
B)
Mass of arsenic in of lake water =
Mass of arsenic in lake water be m.
Mass of arsenic in lake water :
1 g = 0.001 kg
7,633,660.130 g = 7,633,660.130 × 0.001 kg=7,633.660130 kg ≈ 7,633.66 kg
7,633.66 kg the total mass of arsenic in the lake that the company have to remove.
C)
Company claims that it takes 2.74 days to remove 41.90 kilogram of arsenic from lake water.
Days required to remove 1 kilogram of arsenic from the lake water :
Then days required to remove 7,633.66 kg of arsenic from the lake water :
1 year = 365 days
499.19 days =
C)
Company claims that it takes 2.74 days to remove 41.90 kilogram of arsenic from lake water.
Days required to remove 1 kilogram of arsenic from the lake water :
Then days required to remove 7,633.66 kg of arsenic from the lake water :
1 year = 365 days
499.19 days =
It will take 1.37 years to remove all of the arsenic from the lake.
The constant used for the absorption of heat by the sample in melting is . Thus, option A is correct.
The chemical reaction has been defined as the energy in which the energy has been released or absorbed for the breaking of bonds in the reactants and the formation of product.
<h3>Constant for energy absorbed</h3>The energy has been absorbed in the melting of the copper sample. Thus, the sample has been converted from the solid to the liquid state.
The change in energy with the conversion in solid and liquid state has been termed as heat of fusion.
The energy has been absorbed by the system, thus it has been marked with the positive sign.
Therefore, has been the constant used for the absorption of heat by the sample in melting. Thus, option A is correct.
Learn more about melting sample, here: