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dem82 [27]
3 years ago
5

True or false a mixture is made of two or more elements that are chemically combined

Chemistry
1 answer:
FromTheMoon [43]3 years ago
5 0
False. A mixture represents elements or molecules which are not chemically combined.
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Which functional group does the molecule below have?
makvit [3.9K]

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B

Explanation:

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Select all the correct location on the image.
svetoff [14.1K]

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3 years ago
Enter your answer in the provided box. On a certain winter day in Utah, the average atmospheric pressure is 718 torr. What is th
AnnZ [28]

Answer:

The correct answer is 0.047 mol/L

Explanation:

The atmospheric air is a mixture of gases. We can assume an ideal behavior of the gas and use the ideal gas equation:

PV= nRT

where P is the pressure, V is the volume, n is the number of moles, R is a constant (0.082 L.atm/K.mol) and T is the temperature in K.

We have to first convert the pressure from Torr to atm:

760 Torr= 1 atm

⇒ 718 Torr x 1 atm/760 Torr = 0.945 atm

Then, we convert the temperature from ºC to K:

0ºC = 273 K

⇒ -29ºC+273= 244 K

Finally, we introduce the data in the equation and calculate de densitiy, which is the moles per liters of gas (n/V):

PV = nRT

n/V= P/RT

n/V = (0.945 atm)/(0.082 L.atm/K.mol x 244 K) = 0.047 mol/L

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What happens when Mg forms an ionic bond?
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option 1st is correct gains 1 electron and becomes a-1.

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