Multiple Choice
How many atoms are present in 179.0 g of iridium (Ir)? (Atomic mass of Ir = 192.2 g/mol)
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2. Atoms & Elements
Mole Concept
Back2. Atoms & Elements
Mole Concept
- Multiple ChoiceHow many phosphorus atoms are present in 158 kg of elemental phosphorus (P)?38views
- Multiple ChoiceWhich of the following tasks most likely involves a calculation that uses moles?34views
- Multiple ChoiceHow many atoms are present in a 12.0 g sample of lithium (Li)? (Atomic mass of Li = 6.94 g/mol)27views
- Multiple ChoiceWhat is the mass in grams of one mole of any pure substance called?23views
- Multiple ChoiceA sample contains 1.25 grams of CH_4 and no other substances. What is the mole fraction of O_2 in this sample?21views
- Multiple ChoiceHow many argon (Ar) atoms are present in 1.5 × 10^2 g of argon?48views
- Multiple ChoiceA copper sample has a mass of 63.5 g. How many moles of copper are present in the sample? (Atomic mass of Cu = 63.5 g/mol)40views
- Multiple ChoiceA solution has a concentration of 0.025 M HCl. How many moles of H+ are present per liter in this solution? (Use the decimal form of your answer.)23views
- Multiple ChoiceWhich statement best explains the purpose of using a mole in the measurement of matter?26views
- Multiple ChoiceHow many atoms are present in 14 moles of cadmium (Cd)?38views
- Multiple ChoiceHow many moles of oxygen atoms are present in 132.2 g of MgSO_4?28views
- Multiple ChoiceHow many moles are present in 2.3 grams of phosphorus (P)? (Atomic mass of P = 30.97 g/mol)27views
- Multiple ChoiceHow many moles of copper are present in a sample with a mass of 63.546 grams? (Atomic mass of copper = 63.546 g/mol)30views
- Multiple ChoiceAvogadro's law states that at a given temperature and pressure:29views