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3 years ago

Traits are passed from parents to offspring. These traits are determined by

Chemistry

1 answer:

Nookie1986 [14]3 years ago

8 0

Answer: Gene Characteristic. (They are usually made up of more than one gene).

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A throat spray is 1.40% by mass Phenol, C6H5OH in water. If the solution has a density of 0.9956 g/ml, calculate the molarity of

myrzilka [38]

Answer: The molarity of solution is 1.08 M

Explanation:

We are given:

(m/m) of phenol = 1.40 %

This means that 1.40 g of phenol is present in 100 g of solution.

To calculate volume of solution, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

Density of solution = 0.9956 g/mL

Mass of solution = 100 g

Putting values in above equation, we get:

$0.9956g/mL=\frac{100g}{\text{Volume of solution}}\\\\\text{Volume of solution}=100.442mL$

To calculate the molarity of solution, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}$

We are given:

Mass of solute (phenol) = 1.40 g

Molar mass of phenol = 94.11 g/mol

Volume of solution = 100.442 mL

Putting values in above equation, we get:

$\text{Molarity of solution}=\frac{1.40g\times 1000}{94.11g/mol\times 100.442mL}\\\\\text{Molarity of solution}=0.15M$

Hence, the molarity of solution is 0.15 M

8 0

3 years ago

Butylated hydroxytoluene (BHT) is used as an antioxidant in processed foods. (It prevents fats and oils from becoming rancid.) A

Svetllana [295]

Answer:

Molecular mass of BHT is 204,2 g/mol

Explanation:

To answer this question you need to know that Freezing-point depression (A colligative property) is the decrease of the freezing point of a solvent on the addition of a non-volatile solute. The formula is:

ΔT = Kf m

Where ΔT is the freezing point depression (5,5°C - 4,880°C = 0,62°C

Kf that is freezing point molar constant of the solvent (5,065°C/m)

And m that is molality (moles of solute/kg of solvent). Replacing:

$m = 0,1224 \frac{mole Solute}{kgSolvent}$

Knowing you have 100,0g of solvent ≡ 0,1000 kg:

$\frac{0,1224 moles}{1 kg Solvent} *0,1000 kg$ = 0,01224 moles of solute ≡ BHT

As grams of BHT are 2,500, molecular mass of BHT is:

$\frac{2,500g}{0,01224 moles BHT} =$ 204,2 g/mol

I hope it helps

3 0

3 years ago

Which 2 organ systems work together to break down and deliver food molecules to cells

OverLord2011 [107]

Answer:

Explanation:

The stomach digests the food (Digestive System) are the nerves and they send the protein etc.

3 0

3 years ago

Describe the role of the ocean in the water cycle?

Ne4ueva [31]

Answer:

Don't get me wrong the seas are, by distant, the biggest store of water on soil, over 96% of all of Earth's water exists within the seas. Not as it were do the seas give dissipated water to the water cycle, they moreover permit water to move all around the globe as sea streams. I mean, that's all i know man, give me a break.

Explanation:

5 0

3 years ago

Read 2 more answers

Does adding milk impact the health benefits of the tea? Use your understanding from this unit about solutions and food chemistry

mezya [45]

Yes, it mixes it and has vitamins in the tea.

5 0

4 years ago