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valentina_108 [34]
3 years ago
6

Read the statement.

Chemistry
1 answer:
Pani-rosa [81]3 years ago
5 0

Answer:

21%

Explanation:

We have a mass of 210.0 g of NaCl and a volume of 1000 mL.  To find the percentage solution (m/V), we would divide \frac{210g}{1000ml}=21%% percentage solution.

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Otra manera para llamar la aceleración negativa es_______
enyata [817]

Answer:

creo que es cinemática, eso creo

8 0
3 years ago
Find the ph of a 0.250 m solution of nac2h3o2. (the ka value of hc2h3o2 is 1.80×10−5).
Oksi-84 [34.3K]

When NaC2H3O2 is in solution, it would act as a base since it ionizes into sodium ions and acetate ions, the acetate ions would interact with water with the following reaction:<span>

C2H3O2- + H2O <---> C2H3O2H + OH-  

So, from the reaction, hydroxide ions are formed giving it basic properties. We calculate as follows:

[NaC2H3O2] = [Na+] = [C2H3O2-] = 0.250 m

By the ICE table:
            [C2H3O2-]         C2H3O2H      OH-
I              0.250                     0                0
C                -x                      +x               +x
------------------------------------------------------------
E            0.250 - x                x                 x         

 1.80×10^−5 = x^2 / (0.250 - x)</span>

Solving for x, we have 

x = 0.002112

pOH = -log 0.002112

pOH = 2.68

pH = 14 - 2.68 = 11.32


Therefore, the pH of the solution is about 11.32.

4 0
3 years ago
Why is it that you might feel the effect of gravitational forces between you and Earth, but not between you and a classmate?
MakcuM [25]

Answer:

Because the mass of the the earth is way bigger than the mass of a classmate

Explanation:

Formula for force of gravity is;

F = Gm1•m2/r²

Where m1 and m2 are the two objects masses in question.

So, m1 may be your mass while m2 may be either the mass of the earth or your classmate.

The bigger the mass of m2, the more the force of gravity

Mass of the earth is about 5.97 × 10^(24) kg is which is so much more bigger than that of the classmate which is a human being.

Therefore, the reason why you may feel the effect of the gravitational forces between you and Earth, but not between you and a classmate is probably because the mass of the the earth is way bigger than the mass of a classmate

4 0
3 years ago
How many moles are in 100 grams of gold?
raketka [301]

Answer:

0.01 mole

Explanation:

4 0
3 years ago
400 ms^2/0.080 s <br><br> solve
Nana76 [90]

Answer: 5000ms^2 s

Explanation:

5 0
3 years ago
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