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m_a_m_a [10]
2 years ago
15

Which kind of investigations allow for the control of variables?

Chemistry
1 answer:
Butoxors [25]2 years ago
5 0

Answer:

the answer to this is O hypothesis

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A molecule of glucose is comprised of 6 atoms of carbon, 12 atoms of hydrogen, and 6
Tanya [424]

Answer:

48

Explanation:

because you add 6 and 6 and 12 to get it

7 0
2 years ago
Which of the following describes the electron sharing between two oxygen atoms? Each oxygen shares one electron with the other.
Troyanec [42]
I believe each oxygen shares 2 elections with the other.
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Question 7 (1 point)
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3 years ago
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Multiple choice-- 16 pts!
Naddika [18.5K]

Answer: It decreases because nonvolatile aluminum and chloride ions now occupy some of the volume of the system.

Explanation:

Vapor pressure of a liquid  is defined as the pressure exerted by the vapors  in equilibrium with the liquid/solution at a particular temperature.

So, when a non-volatile solute is added to a solvent then its molecules align at the surface of liquid. As a result, less number of solvent molecules will escape from the solution. Thus, there will be decrease in vapors and thus the vapor pressure decrease.

The relative lowering of vapor pressure is directly proportional to the amount of dissolved solute.

6 0
2 years ago
An element has two naturally-occurring isotopes. The mass numbers of these isotopes are 113 amu and 115 amu, with natural abunda
DENIUS [597]

Answer: Its average atomic mass is 114.9 amu

Explanation:

Mass of isotope 1 = 113 amu

% abundance of isotope 1 = 5% = \frac{5}{100}=0.05

Mass of isotope 2 = 115 amu

% abundance of isotope 2 = 95% = \frac{95}{100}=0.95

Formula used for average atomic mass of an element :

\text{ Average atomic mass of an element}=\sum(\text{atomic mass of an isotopes}\times {{\text { fractional abundance}})

A=\sum[(113\times 0.05)+(115\times 0.95)]

A=114.9amu

Thus its average atomic mass is 114.9 amu

5 0
3 years ago
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