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Nastasia [14]
3 years ago
5

Which of the following is an alkaline earth metal?

Chemistry
1 answer:
svetlana [45]3 years ago
4 0
Magnesium is the answerr
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Which of the following gas samples would have the largest volume, if all samples are at the same temperature and pressure?
crimeas [40]

Answer:

a) 8×10²³ molecules of N2

Explanation:

Let us consider the same temperature and pressure of both sample are standard temperature and pressure.

Standard temperature = 273.15 K

Standard pressure = 1 atm

Number of moles of CO₂ = 0.107  mol

Volume of CO₂ = ?

Solution:

PV = nRT

R = general gas constant = 0.0821 atm.L /mol.K

1 atm × V = 0.107 mol × 0.0821 atm.L /mol.K × 273.15 K

1 atm × V = 2.4 atm.L

V = 2.4 atm.L/1 atm

V = 2.4 L

Volume of N₂:

Number of moles of N₂:

1 mole =  6.022 ×10²³ molecules

8×10²³ molecules × 1 mol /  6.022 ×10²³ molecules

1.33 mol

PV = nRT

R = general gas constant = 0.0821 atm.L /mol.K

1 atm × V = 1.33 mol × 0.0821 atm.L /mol.K × 273.15 K

1 atm × V = 29.83  atm.L

V = 29.83  atm.L/1 atm

V = 29.83 L

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3 years ago
Mi One should know the properties of the components of the mixture to separate it. Explain with an example.​
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What is the concentration of a 1.5L solution that contains 0.030 mol of hydrochloric acid?
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Concentration is volume over number of moles
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Energy in an ecosystem flow from consumers to producers.True of False
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False - A producer always provides food for the consumer. 
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The bathtub of water would melt the most ice because it has a larger area
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