Chemistry Solutions Library

Chemistry Solutions Library

Access over 27,163 Chemistry video and text solutions to help you complete your homework.

Browse Solutions

27,163 solutions

Mole Concept

Q. How many moles are in 25 mg of O 2? (Atomic mass of O = 16.00 g/mol) A) 7.8 ×10−4 B) 1.6 ×10−3 C) 0.40 D) 0.80 E) 800

Solved • Feb 12, 2016

Mole Concept

Q. For a 90.0 g sample of glucose (C6H12O6) and a 171.1 g sample of sucrose (C12H22O11), which statement is true? a. The sample of glucose has more m...

Solved • Feb 12, 2016

Mole Concept

Q. We have a 1.3 x 1022 lead atoms and the same number of gold atoms. Which statement is true regarding the mass of these samples? a. The mass of bot...

Solved • Feb 11, 2016

Mole Concept

Q. The definition of the mole gives the relationship between: a. mass and the atomic number. b. mass and number of atoms. c. mass and weight. d. t...

Solved • Feb 11, 2016

Mole Concept

Q. Which statement below is true?a. The number of Ni atoms in 100 moles of Ni (s) is the same as the number of Ni atoms in 100 moles of nickel (II) ch...

Solved • Feb 11, 2016

Mole Concept

Q. One molecule of a compound weighs 2.03 x 10 -22 grams. Calculate the molar mass of this molecule. a. 3.37 x 10-46 g/mol b. 3.36 x 10-23 g/mol c....

Solved • Feb 11, 2016

Mole Concept

Q. What is the molar mass of calcium phosphate, Ca 3(PO4)2? a. 87.05 g/mol b. 215.21 g/mol c. 278.18 g/mol d. 279.21 g/mol e. 310.18 g/mol

Solved • Feb 11, 2016