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MArishka [77]
1 year ago
13

(LAB 9: SPECTROSCOPY: ABSORPTION & EMISSION)What are the four steps of the scientific method?

Chemistry
1 answer:
nata0808 [166]1 year ago
7 0

Answer

The four steps of the scientific method are:

1) Observation and description of a natural phenomenon of group of phenomena;

2) Formulation of a hypothesis to explain the phenomena;

3) Use of the hypothesis to predict the existence of other phenomena or to predict quantitatively the results of new observations, i.e to test the hypothesis if the hypothesis is true, find more evidence or find counter-evidence, if the hypothesis is false, create a new hypothesis or try again; and

4) Draw conclusions and repeat –the scientific method is never-ending, and no result is ever considered perfect.

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Nitrogen and oxygen do not react appreciably at room temperature, as illustrated by our atmosphere. But at high temperatures, th
Gre4nikov [31]

Answer : The equilibrium concentration of NO is, 0.0092 M.

Solution :

First we have to calculate the concentration of NO.

\text{Concentration of NO}=\frac{\text{Moles of }NO}{\text{Volume of solution}}=\frac{0.3152mol}{2.0L}=0.1576M

The given equilibrium reaction is,

                           N_2(g)+O_2(g)\rightleftharpoons 2NO(g)

Initially conc.      0        0           0.1576

At eqm.               (x)       (x)        (0.1576-2x)

The expression of K_c will be,

K_c=\frac{[NO]^2}{[N_2][O_2]}

0.0153=\frac{(0.1576-2x)^2}{(x)\times (x)}

By solving the term, we get:

x=0.0742,0.0839

Neglecting the 0.0839 value of x because it can not be more than initial value.

Thus, the value of 'x' will be, 0.0742 M

Now we have to calculate the equilibrium concentration of NO.

Equilibrium concentration of NO = (0.1576-2x) = [0.1576-2(0.0742)] = 0.0092 M

Therefore, the equilibrium concentration of NO is, 0.0092 M.

5 0
3 years ago
Which graph correctly shows the effect on the freezing point caused by increasing the molality of a solution ?
beks73 [17]
The answer to your question is graph A :)
6 0
3 years ago
Read 2 more answers
What is the conjugate acid of HCO3- ?OH-H2CO3CO32-H2OH3O+
adell [148]

<u>Answer:</u> The conjugate acid of HCO_3^- is H_2CO_3

<u>Explanation:</u>

According to the Bronsted-Lowry conjugate acid-base theory:

  • An acid is defined as a substance which looses donates protons and thus forming conjugate base.
  • A base is defined as a substance which accepts protons and thus forming conjugate acid.

To form a conjugate acid of HCO_3^-, this compound will accept one proton to form H_2CO_3

The chemical equation for the formation of conjugate acid follows:

HCO_3^-+H^+\rightarrow H_2CO_3

The conjugate acid formed is named as carbonic acid.

Hence, the conjugate acid of HCO_3^- is H_2CO_3

5 0
3 years ago
How many atoms are in 2 moles of carbon​
ollegr [7]

Answer:

Explanation:

2 mole x 6.023x 10^23atoms/mole =12.04 atoms

4 0
3 years ago
What is the cost of carbon in gram
Morgarella [4.7K]
Carbon is 12 grams per mole
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