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chubhunter [2.5K]
3 years ago
13

Quantitative observations always include _______.

Chemistry
2 answers:
Vlad [161]3 years ago
8 0

The answer to your question is,

A. Numbers

-Mabel <3

deff fn [24]3 years ago
8 0

Answer:

A. numbers

Explanation:

Quantitative observations are those that quantify data through the use of numbers. This is done in order to generalize results from a sample to the population that is being studied. Quantitative research tends to rely on random samples and statistical data and analysis. Moreover, it tends to use methods such as questionnaires, surveys and interviews.

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For the following reaction, KcKc = 255 at 1000 KK.
bonufazy [111]

Answer :

The equilibrium concentration of CO is, 0.016 M

The equilibrium concentration of Cl₂ is, 0.034 M

The equilibrium concentration of COCl₂ is, 0.139 M

Explanation :

The given chemical reaction is:

                           CO(g)+Cl_2(g)\rightleftharpoons COCl_2(g)

Initial conc.      0.1550      0.173           0

At eqm.          (0.1550-x)  (0.173-x)         x

As we are given:

K_c=255

The expression for equilibrium constant is:

K_c=\frac{[COCl_2]}{[CO][Cl_2]}

Now put all the given values in this expression, we get:

255=\frac{(x)}{(0.1550-x)\times (0.173-x)}

x = 0.139 and x = 0.193

We are neglecting value of x = 0.193 because equilibrium concentration can not be more than initial concentration.

Thus, we are taking value of x = 0.139

The equilibrium concentration of CO = (0.1550-x) = (0.1550-0.139) = 0.016 M

The equilibrium concentration of Cl₂ = (0.173-x) = (0.173-0.139) = 0.034 M

The equilibrium concentration of COCl₂ = x = 0.139 M

5 0
3 years ago
What is a coefficient?
mario62 [17]

Answer:

Coefficients are the numbers in front of the formulas.

4 0
3 years ago
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Can someone please check my answer??!!!
Ksenya-84 [330]

Answer:

I think its correct

5 0
3 years ago
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What is 2-2? When the cow is green
bija089 [108]
0 with a green cow lol
6 0
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How many molecules are in 4.50 moles of H2O?
alisha [4.7K]
C can be the only correct answer - 6.023 x 10^23 is the amount of molecules in a mol of an element. 4.5 x 6.023 x 10^23 can not equal anything but C.

4.5 x 6.023 x 10^23 = 2.71035 x 10^24
8 0
3 years ago
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