allisonezell32 allisonezell32

19-07-2020
Chemistry

contestada

Calculate the number of moles in 25.0 g of each of the
following:
a. He
b. 02
c. Al(OH)3
d. Ga S3
e. C4H10, butane

Respuesta :

nobleswift nobleswift

19-07-2020

Answer:

A. 6.25moles

B. 0.78moles

C. 0.32moles

D. 0.15moles

E. 0.43moles

Explanation:

use

n = mass/molar mass

A. He

25/4 = 6.25moles

B. O2

25/32 = 0.78moles

C. Al(OH)3

27+ 3(17) = 78
25/78 = 0.32 moles

D. GaS3

70+3(32) = 166
25/166 = 0.15moles

E. C4H10

4(12)+10(1) =58
25/58 = 0.43moles

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