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bezimeni [28]
3 years ago
8

Convert 13,400 m to km.

Chemistry
2 answers:
sveta [45]3 years ago
8 0

Answer:

13.4 kilometers

Explanation:

timofeeve [1]3 years ago
6 0
ANSWER 13.4 kilometers
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In simple diffusion, small molecules without charges such as oxygen and carbon dioxide flow through a plasma membrane without assistance and without expending energy. Other substances such as proteins<span>, glucose and charged particles called ions cannot pass through the selectively permeable membrane.</span>
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4. the answer is not D , please answer
Kisachek [45]

Answer:

i think c??

Explanation:

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The boiling point of a substance is known to be 293°C. What is the vapor pressure of that substance at 220°C?
love history [14]

Explanation:

The boiling point of a substance is 293°C.

The boiling point is the temperature at which the vapor pressure of a liquid becomes equal to the atmospheric pressure.

So, at the boiling point:

The vapor pressure =atmospheric pressure = 1 atm.

To get the vapor pressure of the substance at 220°C is definitely less than 1 atm.

Since, as the temperature increases, the vapor pressure of the liquid increases.

8 0
3 years ago
What volume of NaOH(aq) would be needed to reach the equivalence point if the concentration of the added base were 0.290 M?
DiKsa [7]

Answer:

17.2mL are needed

Explanation:

<em>The pH curve for titration of 50.0 mL of a 0.100 M solution of hydrochloric acid</em>

<em />

A strong acid as HCl reacts with a strong base as NaOH producing water and a salt. The chemical equation is:

HCl + NaOH → H₂O + NaCl

<em>Where 1 mole of HCl reacts per mole of NaOH</em>

<em />

To solve this question we must find the moles of HCl added = Moles NaOH you must add to reach the equivalence point. With these moles and the molar concentration we can find the volume that would be needed as follows:

<em>Moles HCl:</em>

50.0mL = 0.0500L * (0.100moles / L) = 0.00500 moles HCl = Moles NaOH

<em>Volume NaOH:</em>

0.00500 moles NaOH * (1L / 0.290moles) = 0.0172L NaOH =

<h3>17.2mL are needed</h3>
3 0
3 years ago
If the percent by mass is 4.0% and the mass of the solution is 200 g, what is the mass of solute in solution?
Inessa05 [86]

Answer:

8 grams.

Explanation:

When solving this type of problem, you need to find how many grams 4.0% of 200g will be equivalent to. You can do this by setting up an equation as such:

200 grams ×0.04 = 8 grams. (0.04 is equivalent to 4%)

4 0
4 years ago
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