Calculating the number of moles given a mass of a substance

Calculate the number of moles in 53.89 g of Al2(CrO4)3

(a)  

Answer explanation

the molecular weight of Al2(CrO4)3 is 401.94 grams/mol. Divide the given mass of 53.89 by 401.94 which equals 0.1341 moles of Al2(CrO4)3

Calculate the number of moles in 490.98 g of Hg2Cr2O7

(a)  

Answer explanation

the molecular weight of Hg2Cr2O7 is 617.169 grams/mol. Divide the given mass of 490.98 by 617.169 which equals 0.7955 moles of Hg2Cr2O7

Calculate the number of moles in 63.47 g of Mn2(SO3)3

(a)  

Answer explanation

the molecular weight of Mn2(SO3)3 is 350.065 grams/mol. Divide the given mass of 63.47 by 350.065 which equals 0.1813 moles of Mn2(SO3)3

Calculate the number of moles in 93.14 g of SnI4

(a)  

Answer explanation

the molecular weight of SnI4 is 626.327 grams/mol. Divide the given mass of 93.14 by 626.327 which equals 0.1487 moles of SnI4

Tags

NGSS.HS-PS1-7

Calculate the number of moles in 491.25 g of NiCl2

(a)  

Answer explanation

the molecular weight of NiCl2 is 129.599 grams/mol. Divide the given mass of 491.25 by 129.599 which equals 3.7905 moles of NiCl2

Tags

NGSS.HS-PS1-7

Calculate the number of moles in 581.44 g of Pb(MnO4)2

(a)  

Answer explanation

the molecular weight of Pb(MnO4)2 is 445.068 grams/mol. Divide the given mass of 581.44 by 445.068 which equals 1.3064 moles of Pb(MnO4)2

Calculate the number of moles in 369.01 g of AlP

(a)  

Answer explanation

the molecular weight of AlP is 57.956 grams/mol. Divide the given mass of 369.01 by 57.956 which equals 6.3671 moles of AlP

Calculate the number of moles in 499.66 g of KOH

(a)  

Answer explanation

the molecular weight of KOH is 56.105 grams/mol. Divide the given mass of 499.66 by 56.105 which equals 8.9058 moles of KOH

Calculate the number of moles in 286.41 g of LiHSO4

(a)  

Answer explanation

the molecular weight of LiHSO4 is 104.011 grams/mol. Divide the given mass of 286.41 by 104.011 which equals 2.7537 moles of LiHSO4

Tags

NGSS.HS-PS1-7

Calculate the number of moles in 308.73 g of Hg2SO3

(a)  

Answer explanation

the molecular weight of Hg2SO3 is 481.247 grams/mol. Divide the given mass of 308.73 by 481.247 which equals 0.6415 moles of Hg2SO3

Tags

NGSS.HS-PS1-7