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Tju [1.3M]
2 years ago
15

Find the pH of a solution whose H concentration is 0.7 x 10-3.

Chemistry
1 answer:
dexar [7]2 years ago
6 0

Answer: pH = 3.15

Explanation: Solved in the attached picture.

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Sodium metal reacts with aluminum chloride to produce sodium chloride and aluminum. The balanced reaction is: 3 Na(s) + AlCl3(aq
andre [41]
First convert 12.0g of Na to moles using the grams to moles conversation and you get about .5219 moles (I didn't use significant figures). Divide that number by 3 because that is the coefficient of Na and you will get about .17398 moles, which is how many moles are in 1. Since Al has a coefficient of 1, .17398 woild be your final answer
3 0
3 years ago
The train traveled 100 miles in 4 hours how fast was the train traveling
DanielleElmas [232]

Answer: the train was going 25 mph

Explanation: 100 divided by 4 is 25

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3 years ago
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A purified protein has a molecular mass of 360 kDa when measured by size exclusion chromatography. When analyzed by gel electrop
Dimas [21]

Answer:

A protein has four subunits whose molecular masses are 140, 80, and 60 kDa.

A disulfide bond links the two 80 kDa subunits (possibly identical).

Explanation:

Given that:

A protein has four subunits whose molecular masses are 140, 80, and 60 kDa.

A disulfide bond links the two 80 kDa subunits (possibly identical).

As a result of SDS and dithiothreitol analysis treatment, the molecular masses can not be 360 in total. They are 280, which implies that they are in short of 80 kDa. This means that there are possibilities that two groups with a molecular mass of 80 kDa which are joined by a disulfide bond.

The presence of SDS and dithiothreitol acts as a reducing agent, and they can break disulfide bonds whose pH is greater than 7, i.e. those in basic condition.

4 0
3 years ago
Which has a greater amount of particles, 1.00 mole of hydrogen (H) or 1.00 moles of oxygen(0)?
Bas_tet [7]

Answer:

Both have the same amount of particles.

Explanation:

From Avogadro's hypothesis, we understood that 1 mole of any substance contains 6.02×10²³ particles.

This implies that 1 mole of Hydrogen contains 6.02×10²³ particles. Also, 1 mole of oxygen contains 6.02×10²³ particles.

Thus, 1 mole of Hydrogen and 1 mole of oxygen contains the same number of particles.

7 0
2 years ago
A physician has ordered 0.50 mg of atropine, intramuscularly. If atropine were available as 0.25 mg/mL of solution, how many mil
sladkih [1.3K]
If 0.25mg of atropine is in 1mL
                  so
    0.50mg of atropine is in x

x=\frac{0.5mg*1mL}{0.25mg}=2mL
6 0
3 years ago
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