3 years ago

WILL RATE AND GIVE BRAINLIEST!!

Chemistry

2 answers:

Andrew [12]3 years ago

6 0

A) a disk formed of long trails of stars coiled into a spiral

Anna007 [38]3 years ago

6 0

Answer:

A is the answer, i just got it right on my FLVS test.

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When matter is a gass, a lot of the time it is ____?

Zielflug [23.3K]

I’d say most likely air, oxygen, or carbon dioxide

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Which of the following elements is a metalloid?

Deffense [45]

The answer to your question would be silicon. I hope this helped!!!

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16. The concentration of a solution of potassium hydroxide is determined by titration with nitric

____ [38]

Answer:

$M_{base}=0.709M$

Explanation:

Hello,

In this case, since the reaction between potassium hydroxide and nitric acid is:

$KOH+HNO_3\rightarrow KNO_3+H_2O$

We can see a 1:1 mole ratio between the acid and base, therefore, for the titration analysis, we find the following equality at the equivalence point:

$n_{acid}=n_{base}$

That in terms of molarities and volumes is:

$M_{acid}V_{acid}=M_{base}V_{base}$

Thus, solving the molarity of the base (KOH), we obtain:

$M_{base}=\frac{M_{acid}V_{acid}}{V_{base}} =\frac{0.498M*42.7mL}{30.0mL}\\ \\M_{base}=0.709M$

Regards.

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3 years ago

The temperature of a gas rose from 250K to 350K. At 350K, the volume of the gas was 3.0L. If the pressure did not change, what w

LenaWriter [7]

Hey there,

So. . I believe is how you do it. I did 350 x 3.0 and it got me 1,050.
We always multiply it by when it come to the initial volume of the gas.

Hope this helps.

~Jurgen<span />

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Express the ratio 1:<br><img src="https://tex.z-dn.net/?f=1%20%5Cfrac%7B1%20%7D%7B8%7D%20" id="TexFormula1" title="1 \frac{1 }{8

tester [92]

Explanation:

To out this fraction in its simplest form, you need to multiply the 8 by the 1 and then add the 1 in the numerator.

You end up getting

$\frac{9}{8}$

Answer:

$\frac{9}{8}$

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3 years ago