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BabaBlast [244]

2 years ago

9

The research step in the process of creating a hypothesis refers to _____.

2 answers:

algol132 years ago

7 0

Answer:doing background research about your question

Explanation:

Prior to the formulation of a research hypothesis, a scientist does extensive background research on the question he is researching. This background search will reveal likely cause and effect relationships which could now be formulated into a hypothesis and tested by experiments. A hypothesis is the result of painstaking research into a problem. A hypothesis can only be formulated after the research question has been properly understood via background research.

Lelechka [254]2 years ago

3 0

The is the B) doing background research about the question

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Using the average initial pH of your acetic acid solutions (2.96), and the average molarity of those solutions(.0602), calculate

Orlov [11]

Answer : The value of Ka for acetic acid is, $2.03\times 10^{-5}$

Explanation :

The chemical formula of acetic acid is, $CH_3COOH$ .

The chemical equilibrium reaction will be:

$CH_3COOH\rightleftharpoons CH_3COO^-+H^+$

Given:

pH = 2.96

First we have to calculate the concentration of hydrogen ion.

$pH=-\log [H^+]$

$2.96=-\log [H^+]$

$[H^+]=1.096\times 10^{-3}M$

That means,

$[H^+]=[CH_3COO^-]=1.096\times 10^{-3}M$

$[CH_3COOH]=0.0602-(1.096\times 10^{-3})=0.0591M$

The expression for reaction is:

$K_a=\frac{[CH_3COO^-][H^+]}{[CH_3COOH]}$

$K_a=\frac{(1.096\times 10^{-3})\times (1.096\times 10^{-3})}{0.0591}$

$K_a=2.03\times 10^{-5}$

Thus, the value of Ka for acetic acid is, $2.03\times 10^{-5}$

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3 years ago

What are the units of density

Nataliya [291]

Answer:

Kg/ ml

Explanation:

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2 years ago

An atom is made of 16 protons, 17 neutrons, and 18 electrons. What is the mass number of

Nataliya [291]

Answer:

The answer is 33 .

Explanation:

The mass number of an atom is the atomic mass which consists of proton and neutron. This atom has 16 protons and 17 neutrons so it has a mass of 33 :

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sergiy2304 [10]

Answer:

1.5x1024

Explanation:

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