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Veronika [31]
3 years ago
13

In order to calculate the mass of an element in a given mass of a compound the mass of the compound is multiplied by the mass

Chemistry
1 answer:
Allushta [10]3 years ago
7 0
Molar mass is the mass of a given substance divided by the amount of that substance, measured in g/mol.
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How many particles are in a 151 g sample of Li2O?
neonofarm [45]

Answer:

3.052 × 10^24 particles

Explanation:

To get the number of particles (nA) in a substance, we multiply the number of moles of the substance by Avogadro's number (6.02 × 10^23)

The mass of Li2O given in this question is as follows: 151grams.

To convert this mass value to moles, we use;

moles = mass/molar mass

Molar mass of Li2O = 6.9(2) + 16

= 13.8 + 16

= 29.8g/mol

Mole = 151/29.8g

mole = 5.07moles

number of particles (nA) of Li2O = 5.07 × 6.02 × 10^23

= 30.52 × 10^23

= 3.052 × 10^24 particles.

4 0
2 years ago
Describe how the meniscus is used to read volume measurements on a graduated cylinder
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Answer:Tthe liquid in a graduated cylinder curves up at the edge where the liquid meets the wall of the cylinder. This curve in the liquid is called the meniscus and is used to determiine the volume of liquid in a graduated cylinder by observing the measurement tick closest to the bottom of the meniscus.

Explanation:

Hope it helps :D

4 0
1 year ago
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How many protons electrons and neutrons does the following isotopes contain 1H+
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2 years ago
the daily dose of ampicillin for the treatment of an ear infection is 115 mg/kg of body weight. what is the daily dose for a 43-
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If 115mg --------- is for --------- 1kg
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3 years ago
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