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spin [16.1K]
4 years ago
10

How is the number of moles of an element determined from a known mass?

Chemistry
1 answer:
goblinko [34]4 years ago
4 0

the mass of 1 mole of the element is used as a conversion factor to convert grams to moles

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What is the change in the freezing point of water when 68.5 g of sucrose is
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The change is that the water will freeze to 0 or minus I don’t know as I’m not to sure
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3 years ago
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1. 17.0 grams of xenon hexafluoride is in a solid container. How many milliliters of that gas
BlackZzzverrR [31]

Answer: The volume of gas is 3020 ml

Explanation:

According to ideal gas equation:

PV=nRT

P = pressure of gas = 821.4 torr =  1.08 atm     (760 torr = 1atm)

V = Volume of gas in L = ?

n = number of moles = \frac{\text {given mass}}{\text {Molar mass}}=\frac{17.0g}{245.28g/mol}=0.069mol

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4 0
3 years ago
Ethan makes the table below to record his observations when mixing baking soda and vinegar in a beaker. Ethan claims that a chem
kozerog [31]

Answer: a

Explanation:

Many bubbles formed after mixing.

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Why would it be colder in Aspen than it is in Denver?
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Answer:

1 and 2

Explanation:

The postulates of Dalton's atomic theory are;

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By comparing the postulates above and those in the questions, we find that only the following postulates are part of the daltons atomic theory;

1. Atoms combine in fixed ratios of whole numbers.

2. Atoms of each element have different properties.

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3 years ago
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