Concept explainers
(a)
Interpretation:
The number of formula units in
Concept introduction:
A mole is a basic unit that is used in the International system of units (SI). It is abbreviated as
Answer to Problem 31E
The number of formula units in
Explanation of Solution
The molecular formula for lithium nitrate is
The molar mass of nitrogen is
The molar mass of oxygen is
The molar mass of lithium is
The molar mass of
Therefore, the molar mass of
Thus, one mole of
The number of moles in
The number of formula units in
Substitute the number of moles of
The number of formula units in
(b)
Interpretation:
The number of formula units in
Concept introduction:
A mole is a basic unit that is used in the International system of units (SI). It is abbreviated as
Answer to Problem 31E
The number of formula units in
Explanation of Solution
The molecular formula for lithium sulfide is
The molar mass of lithium is
The molar mass of sulfur is
The molar mass of
Therefore, the molar mass of
Thus one mole of
The number of moles in
The number of formula units in
Substitute the number of moles of
The number of formula units in
(c)
Interpretation:
The number of formula units in
Concept introduction:
A mole is a basic unit that is used in the International system of units (SI). It is abbreviated as
Answer to Problem 31E
The number of formula units in
Explanation of Solution
The molecular formula for iron
The molar mass of iron is
The molar mass of sulfur is
The molar mass of oxygen is
The molar mass of
Therefore, the molar mass of
Thus one mole of
The number of moles in
The number of formula units in
Substitute the number of moles of
The number of formula units in
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Chapter 7 Solutions
Introductory Chemistry: An Active Learning Approach
- In what units are atomic, molecular, and formula mass expressed? Define those units.arrow_forwardQuestions 23 to 26: Find the number of moles for each mass of substance given. a 53.8g beryllium b 781gC3H4Cl4 c 0.756g calcium hydroxide d 9.94g cobalt (III) bromide e 8.80g ammonium dichromate dichromate ion, Cr2O72 f 28.3g magnesium perchloratearrow_forwardQuestions 27 to 30: Calculate the mass of each substance from the number of moles given. a 0.542mol sodium hydrogen carbonate b 0.0789mol silver nitrate c 9.61mol sodium hydrogen phosphate d 0.903mol calcium bromate e 1.14mol ammonium sulfitearrow_forward
- Determine a chemical formula from elemental analysis (i.e., from % composition).arrow_forwardWhich of the three terms atomic mass, molecular mass, or formula mass is most appropriate for each of the following: ammonia, calcium oxide, barium, chlorine, sodium carbonate?arrow_forwardA compound is found to contain 37.32 % phosphorus, 16.88 % nitrogen, and 45.79 % fluorine by mass. To answer the question, enter the elements in the order presented above. QUESTION 1: The empirical formula for this compound is QUESTION 2: The molar mass for this compound is 82.98 g/mol. The molecular formula for this compound isarrow_forward
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- A compound is found to contain 26.96 % sulfur , 13.45 % oxygen , and 59.59 % chlorine by mass. To answer the question, enter the elements in the order presented above. QUESTION 1: The empirical formula for this compound is QUESTION 2: The molar mass for this compound is 119.0 g/mol. The molecular formula for this compound isarrow_forwardQuestion attachedarrow_forwardA compound is found to contain 55.39 % boron , 8.280 % hydrogen , and 36.33 % chlorine by mass. To answer the question, enter the elements in the order presented above. QUESTION 1: The empirical formula for this compound is QUESTION 2: The molar mass for this compound is 97.58 g/mol. The molecular formula for this compound isarrow_forward
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