Open QuestionCalculate the mass of 25,000 molecules of nitrogen gas. (1 mole = 6.02 x 1023 molecules)734views
Open QuestionOne atom of gold weighs 3.27 x 10-13 ng. how many gold atoms are in 1.0 g of gold?624views
Open QuestionA rigid vessel contains 2.5 mol of H2(g). How many grams of hydrogen are in the vessel?580views
Textbook Question(a) Write 'true' or 'false' for each statement. (a) A mole of horses contain a mole of horse legs.14views
Textbook QuestionA gold sample contains 4.65×1024 gold atoms. How many moles of gold does the sample contain?