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4 years ago

A tool to measure forces such as weight or friction

Chemistry

1 answer:

12345 [234]4 years ago

6 0

It would probably be a balance or scale

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You are given a protein solution with a concentration of 0.15 mg/ml.

Thepotemich [5.8K]

Answer:

We need 2.933 L of 0.15 mg /mL of protein solution.

Explanation:

Concentration of given solution $C_1 = 0.15 mg/mL$

1 mg = 0.001 g , 1 mL = 0.001 L

$C_1=\frac{0.15\times 0.001 mg}{1\times 0.001 L}=0.15 g/L$

Molecular weight of protein = 22,000 Da =22,000 g/mol

Initial concentration in moles/liter:

$C_1=\frac{0.15 g/L}{22,000 g/mol}=6.8182\times 10^{-6} mol/L$

Initial concentration in micromoles/mL :

1 L = 1000 mL

$C_1=6.8182\times 10^{-6} mol/L=\frac{6.8182\times 10^{-6}\times 10^6 \mu mol}{1000 mL}=6.8182\times 10^{-3} \mu mole/ mL$

Initial concentration in micromoles/microLiter :

1 L = 1000,000 μL

$C_1=6.8182\times 10^{-6} mol/L=\frac{6.8182\times 10^{-6}\times 10^6 \mu mol}{1000000 \mu L}=6.8182\times 10^{-6}\mu mol/\mu L$

Moles of protein required = 20 μmoles

n(Moles)=C(concentration) × V(Volume of solution)

$20 \mu mol=6.8182\times 10^{-6}\mu mol/\mu L\times V$

$V =\frac{20 \mu mol}{6.8182\times 10^{-6}\mu mol/\mu L}$

$V=2.933\times 10^6 \mu L = 2.933 L$

We need 2.933 L of 0.15 mg /mL of protein solution.

6 0

3 years ago

The following are examples of chemical properties except ____.

klio [65]

The ability to be crushed is a physical property and therefore is the answer.

4 0

4 years ago

Read 2 more answers

Current is created by the movement of what subatomic particle?

Licemer1 [7]

Answer:

I believe the answer is electrons.

Explanation:

Protons can't move and neurons don't have a charge so it would be electrons.

3 0

2 years ago

Is one gram equal to one mL?

VladimirAG [237]

Only for water it is

7 0

4 years ago

Add the polynomials (7x^3-2x^2-12)+(3x^3-8x^2+10x)

laiz [17]

Answer:

10 x ^3 − 10 x ^2 + 10 x − 12

Explanation:

4 0

3 years ago