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Mrrafil [7]
3 years ago
12

Just need some help with this stuff, answer please :)

Chemistry
2 answers:
Temka [501]3 years ago
8 0

Answer:student A

Explanation:

elena55 [62]3 years ago
5 0

Answer:

student b

Explanation:

1 N and 3 h's I dont know why there are two dots on n

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The pH of saliva is normally in the range of 6.4 to 7.0. However, when a person is ill, the person's saliva becomes more acidic.
aleksley [76]

Answer:

Concentration of hydrogen ion, [H^+]=5.0118*10^{-6} M

Explanation:

pH is defined as the negative logarithm of hydrogen ion's concentration.

The lower the value of pH, the higher the acidic the solution is.

The formula for pH can be written as:

pH=-log[H^+]

Given,

pH of the saliva of Marco = 5.3

To calculate: Hydrogen ion concentration in the saliva

Thus, applying in the formula as:

pH=-log[H^+]

5.3=-log[H^+]

So,

log[H^+]=-5.3

[H^+]=10^{(-5.3)}

[H^+]=5.0118*10^{-6} M

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4 years ago
Which is the correct Lewis structure for acetylene (C2H2)?
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H-C≡C-H this is the lewis structure of acetylene 
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6 0
3 years ago
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What is the formula mass of copper (ii) sulfate to the hundredth amu?
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<span>Copper II Sulfate- Cu 2+ and a sulfate SO4 2- add together nicely to make CuSO4. </span>
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3 years ago
Name the parts of an electromagnet
Oxana [17]

Answer:

The iron core, copper wire, and an electricity source.

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Answer all 5 questions, please
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One day me and my twin brother were jumping on the trampoline and when we fell down my hair rubbed against the surface of it and stuck up

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3 years ago
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