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Tems11 [23]
3 years ago
8

Aight imma let you guys i

Chemistry
2 answers:
Vika [28.1K]3 years ago
8 0
Ksskskskdkejdidkk bysco sskkskskskskskskskskskkskskskskskskskkssk
katrin [286]3 years ago
6 0

Answer:

b

Explanation:

it is right

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Which Si unit would be most appropriate for describing the length of a shoe?
marshall27 [118]

Answer:

Millimeters

Explanation:

A kilogram is for weight, Milliliters is volume, Kilometers is length but too big for a shoe, so Millimeters is the answer by elimination.

3 0
3 years ago
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Assuming that the bath contains 250.0 g of water and that the calorimeter itself absorbs a negligible amount of heat, calculate
Anvisha [2.4K]

Answer:

-3272     kJ/mol

Explanation:

Given and known facts

Mass of Benzene = 0.187 grams

Mass of water = 250 grams

Standard heat capacity of water = 4.18 J/g∙°C

Change in temperature ΔT = 7.48°C

Heat

=250 * 4.18 * 7.48\\=7816.6 \\=7.82

Heat released by benzine is - 7.82 kJ

Now, we know that

0.187 grams of benzene release = -7.82  kJ heat

So, 1 g benzine releases

\frac{ -7.82 }{0.187}\\= -41.8

kJ/g

0.187 * \frac{1}{78.108}=0.00239 mol C6H6

Heat released

= \frac{-7.82}{ 0.00239}

=-3272     kJ/mol

4 0
3 years ago
I NEED HELP PLEASE!!! I WILL RATE BRAINLIEST!!!
lidiya [134]

Answer:

The answer to your question is:  [H+]  = 0.0016

Explanation:

Data

pH = 2.8

[H+] of the solution = ?

Formula

pH = -log [H+]

process

                2.8 =  -log [H+]           then we get antilog

      antilog (-2.8 ) = [H+]    

      [H+]  = 0.0016

6 0
3 years ago
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What is the relationship between the density of the air molecules and the air pressure?
Nikolay [14]
Pressure has the opposite effect on air density increasing the pressure increases the density
5 0
3 years ago
Why should you always condition a buret before running a titration?.
Alex Ar [27]

Answer:

Conditioning two or three times will insure that the concentration of titrant is not changed by a stray drop of water.

Explanation:

"Check the tip of the buret for an air bubble. To remove an air bubble, whack the side of the buret tip while solution is flowing".

5 0
3 years ago
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