The mass of 3.2 moles of ammonia (NH3) gas?
A. 53.4 grams
B. 54.4 grams
C. 55.4 grams
D. 56.4 grams
Chemistry Mcqs
How many moles are in 22.2 grams of Calcium chloride, CaCl2?
How many moles are in 22.2 grams of Calcium chloride, CaCl2?
A. 0.2 moles
B. 0.3 moles
C. 0.4 moles
D. 0.5 moles
What is the mass percent of silver in silver notrate, AgNO3?
What is the mass percent of silver in silver notrate, AgNO3?
A. 64.5%
B. 65.6%
C. 63.5%
D. 61.5%
A sample of an iron and oxygen ore has a mass of 35.8 grams. The iron in the compound has a mass of 27.9 grams. What is the percent iron in the ore?
A sample of an iron and oxygen ore has a mass of 35.8 grams. The iron in the compound has a mass of 27.9 grams. What is the percent iron in the ore?
A. 74% Fe
B. 75% Fe
C. 77% Fe
D. 78% Fe
A compound is determined to have an emperical formula of C2H6O and a molar mass of 138 g/mole. What is the molecular formula?
A compound is determined to have an emperical formula of C2H6O and a molar mass of 138 g/mole. What is the molecular formula?
A. C2H6O
B. C6H18O3
C. C6H12O6
D. C2H5O
A substance is analyzed and found to have an emperical formula of CH2 and a molar mass of 56g/mole. What is the molecular formula of the compound?
A substance is analyzed and found to have an emperical formula of CH2 and a molar mass of 56g/mole. What is the molecular formula of the compound?
A. C2H4
B. C3H6
C. C4H8
D. C5H10
The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in__________?
The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in__________?
A. 1.8 gram of H2O
B. 12 moles of KMnO4
C. 0.6N H2SO4
D. 4.6 gram of C2H5OH
The molecular formula for cholesterol is C27 H46 O. What are the degrees of unsaturation for this compound?
The molecular formula for cholesterol is C27 H46 O. What are the degrees of unsaturation for this compound?
A. 5
B. 6
C. 7
D. 8
The most appropriate method for separating a large quantity of a mixture of nonvolatile, nonpolar organic compounds would be__________?
The most appropriate method for separating a large quantity of a mixture of nonvolatile, nonpolar organic compounds would be__________?
A. Distillation
B. Extraction
C. Gas chromatography
D. Column chromatography
The relatively high energy of the gauche conformation of butane is primarily associated with_________?
The relatively high energy of the gauche conformation of butane is primarily associated with_________?
A. Angle strain
B. Torsional strain
C. Steric strain
D. Orbital strain