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vodomira [7]
2 years ago
10

HELP!!!! PLEASE, it would be much appreciated.

Chemistry
2 answers:
LekaFEV [45]2 years ago
8 0
It is made of cells, D.
kipiarov [429]2 years ago
4 0

d it is made of cells

Explanation:

because it is the one that makes most sense

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Elza [17]

Answer:

h20

Explanation:

H2O is an acid and a base, and H20 is water.

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3 years ago
How many valence electrons does O-2 have?
timofeeve [1]
Two oxygen atoms in a oxygen molecule share two electrons<span>. Oxygen atoms only have 6 </span>valence electrons<span> (</span>electrons<span> in the outer shell). They want 8 </span>electrons<span> so they need to steal two or share two.</span>
7 0
3 years ago
Read 2 more answers
at atmoshperic pressure, a balloon contains 2.00L of nitrogen of gas. How would the volume change if the Kelvin temperature were
Nataly [62]

<u>Answer:</u> The percent change in volume will be 25 %

<u>Explanation:</u>

To calculate the final temperature of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

\frac{V_1}{T_1}=\frac{V_2}{T_2}

where,

V_1\text{ and }T_1 are the initial volume and temperature of the gas.

V_2\text{ and }T_2 are the final volume and temperature of the gas.

We are given:

V_1=2L\\T_1=T_1\\V_2=?\\T_2=75\% \text{ of }T_1=0.75\times T_1

Putting values in above equation, we get:

\frac{2L}{T_1}=\frac{V_2}{0.75\times T_1}\\\\V_2=\frac{2\times 0.75\times T_1}{T_1}=1.5L

Percent change of volume = \frac{\text{Change in volume}}{\text{Initial volume}}\times 100

Percent change of volume = \frac{(2-1.5)}{2}\times 100=25\%

Hence, the percent change in volume will be 25 %

5 0
2 years ago
What does the simplified model of the hall effect give for the density of free electrons in the unknown metal?
evablogger [386]
The simplified model of the hall effect proved that the current (electric) in metals are carried by electrons and not protons. The hall effect introduced the hall coefficient which is the ratio of the induced electric field to the current density x applied magnetic field. This coefficient is unique for each type of metal. 
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2 years ago
When the pH of a solution is 12.83, what is [H +]?
inn [45]

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B.9.710-11M

Explanation:

<h3>plss tell me if im wrong</h3>

4 0
2 years ago
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