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What is the mass of 5.74 x 1021 formula units of sodium hydroxide: NaOH (Mw. 40.00 g/mol)?
1 answer:
0.38g
Explanation:
Given parameters:
Number of formula units = 5.74 x 10²¹
Molar mass of NaOH = 40g/mol
Unknown:
Mass of NaOH = ?
Solution:
The best way to solve this problem is the use the mole concept.
A mole is the amount of substance that contains the avogadro's number of particles.
The avogadro's number of particles is 6.02 x 10²³particles.
Particles = neutrons, protons, electrons, formula units, e.t.c
To solve this problem, find the the number of moles first then convert to mass.
6.02 x 10²³ formula units = 1 moles
5.74 x 10²¹ formula units = = 0.95 x 10
moles
Mass of NaOH = number of moles x molar mass = 0.0095 x 40 = 0.38g
learn more:
Molar mass brainly.com/question/2861244
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