#78 76) What is the mass of 3.89 mol of diboron tetrabromide?2x10.811+4x79.904 = 21.622+319.616= 341.238g/mol 3.89x34177) How many atoms are present in 1.694 g of cobalt(II) hypochlorite?1.694g of COA2+ CIO1.694g x 1mol/ gx1 mol/6.02x10^23moleculesx atoms/ 1 m6.301x10^21x5%-D3.150x10^22 atoms26.78) 6.347 x 10"atoms of nickel(III) sulfide has a mass of79) How many molecules are present in 0.340 g of Lead (IV) phosphate?0.30gx1 mol/1001.48gx6.023x10^23 molecules/1 mol = 2.04 = 2.080) Acids have a pH ofto1481) Bases have a pH of14to82) Write the molecular formulas for the following hydrocarbons.A) Cyclononane C9H18B) Ethane - C2H6C) Cyclopentane C5H1083) Write the names for the following alkanes.

Given, number of atoms of nickel(III) sulfide =6.347×1026 atomswe are asked to calculate the mass of…

Answered: 26. 78) 6.347 x 10°atoms of nickel(III)…

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26. 78) 6.347 x 10°atoms of nickel(III) sulfide has a mass of

Introductory Chemistry: A Foundation

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Chapter8: Chemical Composition

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Problem 96AP: A compound was analyzed and found to contain the following percentages of elements by mass: carbon,...

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#78

76) What is the mass of 3.89 mol of diboron tetrabromide?
2x10.811+4x79.904 = 21.622+319.616= 341.238g/mol 3.89x341
77) How many atoms are present in 1.694 g of cobalt(II) hypochlorite?
1.694g of COA2+ CIO
1.694g x 1mol/ gx1 mol/6.02x10^23moleculesx atoms/ 1 m
6.301x10^21x5%-D3.150x10^22 atoms
26.
78) 6.347 x 10"atoms of nickel(III) sulfide has a mass of
79) How many molecules are present in 0.340 g of Lead (IV) phosphate?
0.30gx1 mol/1001.48gx6.023x10^23 molecules/1 mol = 2.04 = 2.0
80) Acids have a pH of
to
14
81) Bases have a pH of
14
to
82) Write the molecular formulas for the following hydrocarbons.
A) Cyclononane C9H18
B) Ethane - C2H6
C) Cyclopentane C5H10
83) Write the names for the following alkanes.

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