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문제 29
(a) Write 'true' or 'false' for each statement. (a) A mole of horses contain a mole of horse legs.
문제 29a
(a) Write 'true' or 'false' for each statement. (a) A mole of horses contain a mole of horse legs.
문제 29b
(a) Write 'true' or 'false' for each statement. (b) A mole of water has a mass of 18.0 g.
문제 29c
(a) Write “true” or “false” for each statement. (c) The mass of 1 ammonia molecule is 17.0 g.
문제 29d
(a) Write 'true' or 'false' for each statement. (d) A mole of NaCl(s) contains 2 moles of ions
문제 30a
(a) What is the mass, in grams, of one mole of 12C?
문제 30b
(b) How many bromine atoms are present in one mole of 12C?
문제 31
Without doing any detailed calculations (but using a periodic table to give atomic weights), rank the following samples in order of increasing numbers of atoms: 0.50 mol H2O, 23 g Na, 6.0⨉1023 N2 molecules.
문제 33a
What is the mass, in kilograms, of an Avogadro's number of people, if the average mass of a person is 160 lb?
문제 33b
What is the mass, in kilograms, of an Avogadro's number of people, if the average mass of a person is 160 lb? How does this compare with the mass of Earth, 5.98⨉1024 kg?
- How does this compare with the gross domestic product (GDP) of the United States, which was $17.419 trillion in 2015? (The GDP is the total market value of the nation’s goods and services.)
문제 34
문제 34a
If Avogadro's number of pennies is divided equally among the 321 million men, women, and children in the United States, how many dollars would each receive?
문제 35a
Calculate the following quantities: (a) mass, in grams, of 0.105 mol sucrose (C12H22O11)
문제 35b
Calculate the following quantities: (b) moles of Zn(NO3)2 in 143.50 g of this substance
문제 35c
Calculate the following quantities: (c) number of molecules in 1.0⨉10−6 mol CH3CH2OH
문제 35d
Calculate the following quantities: (d) number of N atoms in 0.410 mol NH3
문제 36a
Calculate the following quantities: (a) mass, in grams, of 1.50⨉10−2 mol CdS
문제 36b
Calculate the following quantities: (b) number of moles of NH4Cl in 86.6 g of this substance
문제 36c
Calculate the following quantities: (c) number of molecules in 8.447⨉10−2 mol C6H6
문제 36d
Calculate the following quantities: (d) number of O atoms in 6.25⨉10−3 mol Al(NO3)3
문제 37a
(a) What is the mass, in grams, of 2.50⨉10−3 mol of ammonium phosphate?
문제 37b
(b) How many moles of chloride ions are in 0.2550 g of aluminum chloride?
문제 37c
(c) What is the mass, in grams, of 7.70⨉1020 molecules of caffeine, C8H10N4O2?
문제 37d
(d) What is the molar mass of cholesterol if 0.00105 mol has a mass of 0.406 g?
문제 38a
(a) What is the mass, in grams, of 1.223 mol of iron(III) sulfate? (b) How many moles of ammonium ions are in 6.955 g of ammonium carbonate? (c) What is the mass, in grams, of 1.50 * 1021 molecules of aspirin, C9H8O4?
문제 38d
(d) What is the molar mass of diazepam (Valium®) if 0.05570 mol has a mass of 15.86 g?
문제 39a
The molecular formula of allicin, the compound responsible for the characteristic smell of garlic, is C6H10OS2. a. What is the molar mass of allicin?
문제 39b
The molecular formula of allicin, the compound responsible for the characteristic smell of garlic, is C6H10OS2. (b) How many moles of allicin are present in 5.00 mg of this substance?
문제 39c
The molecular formula of allicin, the compound responsible for the characteristic smell of garlic, is C6H10OS2. (c) How many molecules of allicin are in 5.00 mg of this substance?
문제 39d
The molecular formula of allicin, the compound responsible for the characteristic smell of garlic, is C6H10OS2. (d) How many S atoms are present in 5.00 mg of allicin?