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2 years ago

How do you find the pH of the compound KCl?

Chemistry

1 answer:

Sergeu [11.5K]2 years ago

7 0

Google it - that’s how

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Avogradoa number was calculated by determining the number of atoms in?

Softa [21]

The answer is:

12.00 g of carbon-12.

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2 years ago

In a constant‑pressure calorimeter, 70.0 mL of 0.350 M Ba(OH)2 was added to 70.0 mL of 0.700 M HCl. The reaction caused the temp

DanielleElmas [232]

<u>Answer:</u> The amount of heat absorbed by the solution is 2.795 kJ

<u>Explanation:</u>

To calculate the mass of water, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

Density of water = 1 g/mL

Volume of water = [70 + 70] = 140 mL

Putting values in above equation, we get:

$1g/mL=\frac{\text{Mass of water}}{140mL}\\\\\text{Mass of water}=(1g/mL\times 140mL)=140g$

To calculate the heat absorbed, we use the equation:

$q=mc\Delta T$

where,

q = heat absorbed

m = mass of water = 140 g

c = heat capacity of water = 4.186 J/g°C

$\Delta T$ = change in temperature = $T_2-T_1=(28.74-23.97)^oC=4.77^oC$

Putting values in above equation, we get:

$q=140g\times 4.186J/g^oC\times 4.77^oC=2795.4J=2.795kJ$

Hence, the amount of heat absorbed by the solution is 2.795 kJ

3 0

2 years ago

How red blood cells different to animal cells

barxatty [35]

Answer:

By contrast, the red blood cells of mammals lack nuclei and other internal structures found in most animal cells. This simplification allows mammal red blood cells to carry more gas-transporting proteins and to squeeze through smaller blood vessels.

Explanation:

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2 years ago

A molecule of ATP contains adenine, ribose, and three phosphate groups. The bond between the last two phosphates is easily broke

AlladinOne [14]

Answer:

A. More energy would be required to break the bond, so the net energy produced would be less.

Explanation:

Since the bond between the second and third phosphate groups are more stable more energy would be required to break them. The net energy produced would be less as some of it is getting consumed to break the stronger bond between the second and third phosphate groups.

In cells ADP (adenosine diphosphate) is easily converted to AMP (adenosine monophosphate with the release of energy and inorganic phosphate.

ADP --> AMP + Pi + energy

8 0

2 years ago

Read 2 more answers

Does heat always produce a chemical change?

julia-pushkina [17]

No not always. In some cases heat produces a physical change, like heat being in contact with ice would melt it, which is a physical change.

hope this helps!

7 0

2 years ago