2 years ago

Give me an example of how can we use osmiosin in our hauses

Chemistry

1 answer:

nlexa [21]2 years ago

3 0

Answer:

Explanation:

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MakcuM [25]

Answer:

Explanation:

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3 years ago

What energy transfers happen when you cook sausages on a camp fire burning wood?

Slav-nsk [51]

Endothermic energy is taking place. The sausage is being heated by the fire and absorbing the thermal energy.

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3 years ago

A solution prepared by dissolving 0.100 mole of propionic acid in enough water to make 1.00 L of solution is observed to have a

torisob [31]

Answer:

C) $k_a=1.3\times 10^{-5}$

Explanation:

pH is defined as the negative logarithm of the concentration of hydrogen ions.

Thus,

pH = - log [H⁺]

The expression of the pH of the calculation of weak acid is:-

$pH=-log(\sqrt{k_a\times C})$

Where, C is the concentration = 0.5 M

Given, pH = 2.94

Moles = 0.100 moles

Volume = 1.00 L

So, $Molarity=\frac{Moles}{Volume}=\frac{0.100}{1.00}\ M=0.100\ M$

C = 0.100 M

$2.94=-log(\sqrt{k_a\times 0.100})$

$\log _{10}\left(\sqrt{k_a0.1}\right)=-2.94$

$\sqrt{0.1}\sqrt{k_a}=\frac{1}{10^{2.94}}$

$k_a=1.3\times 10^{-5}$

4 0

3 years ago

1.<br> How<br> many atoms of Li are there in 7.5 moles of Li?

ZanzabumX [31]

Answer: 4.52x10²⁴ atoms Li

Explanation: For 1 mole of Li it is equal to the Avogadro's Number.

Solution:

7.5 moles Li x 6.022x10²³ atoms Li/ 1 mole Li

= 4.52x10²⁴ atoms Li

6 0

3 years ago

How many hydrogen atoms are in water?

Viefleur [7K]

Water is H2O. hydrogen atom is H1 O2
so hydrogen atom is H2

3 0

3 years ago