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masya89 [10]
3 years ago
5

true or false: Mendeleev's arrangement of elements in the periodic table was based on the observations and experiments of his pr

ecessors who studied mass and properties of elements.
Chemistry
2 answers:
Oduvanchick [21]3 years ago
7 0

This answer is true

djyliett [7]3 years ago
6 0

I would agree. The answer is true

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Convert: 20.9 mL = ___L<br> 2.09<br> 0.209<br> 0.0209<br> 209<br> 20.9
aleksklad [387]

Answer:

0.209

Explanation:

when dealing with mL to L the rule of thumb seems to be to move your decimal place back two spaces.

6 0
3 years ago
Calculate the solubility of carbon dioxide in water at an atmospheric pressure of 0.400 atm (a typical value at high altitude).A
Bond [772]

Answer:

The molar solubility of carbon dioxide gas is 4.662\times 10^{-6} M.

Explanation:

Henry's law states that the amount of gas dissolved or molar solubility of gas is directly proportional to the partial pressure of the liquid.

To calculate the molar solubility, we use the equation given by Henry's law, which is:

C_{CO_2}=K_H\times p_{liquid}

where,

K_H = Henry's constant = 3.50\times 10^{-2}mol/L.atm

p_{CO_2} = partial pressure of carbonated drink

p_{CO_2}=p\times \chi_{CO_2}

where = p = Total pressure = 0.400 atm

\chi_{CO_2} = mole fraction of CO_2=3.33\times 10^{-4}

p_{CO_2}=0.400 atm\times 3.33\times 10^{-4} =0.0001332 atm

Putting values in above equation, we get:

C_{CO_2}=3.5\times 10^{-2}mol/L.atm\times 0.0001332  atm\\\\C_{CO_2}=4.662\times 10^{-6} M

Hence, the molar solubility of carbon dioxide gas is 4.662\times 10^{-6} M.

8 0
3 years ago
Helppp meee Please
Fynjy0 [20]

Answer:

what do you need help with?

Explanation:

5 0
3 years ago
How does Fluoroanimonic acid melt things?
Tomtit [17]

Answer:s the temperature is increased, fluoroantimonic acid decomposes and generates hydrogen fluoride gas (hydrofluoric acid). ... 1  Fluoroantimonic acid has a H0 (Hammett acidity function) value of -31.3. Dissolves glass and many other materials and protonates nearly all organic compounds (such as everything in your body)

tall me is this what you looking for

4 0
3 years ago
Mercury(II) oxide (HgO) decomposes to form mercury (Hg) and oxygen (O2). The balanced chemical equation is shown below.
IceJOKER [234]
2HgO=2Hg + O2
433,18 g. = 32 g
x. = 250 g
x= 3 384,21875 g of HgO is needed
4 0
3 years ago
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