Concept explainers
(a)
Interpretation:
The mass of sodium is to be calculated.
Concept introduction:
A mole is the amount of substance that has
One mole of atom or molecule is equal to
Answer to Problem 22E
The mass of sodium is
Explanation of Solution
The mass of sodium is calculated by the formula shown below.
Where,
•
The value of molar mass of sodium is
Substitute the value of molar mass of sodium in equation (1).
The mass of sodium is
(b)
Interpretation:
The mass of germanium is to be calculated
Concept introduction:
A mole is the amount of substance that has Avogadro’s number of particles
One mole of atom or molecule is equal to
Answer to Problem 22E
The mass of germanium is
Explanation of Solution
The mass of germanium is calculated by the formula shown below.
Where,
•
The value of molar mass of germanium is
Substitute the value of molar mass of germanium in equation (1).
The mass of germanium is
(c)
Interpretation:
The mass of sulfur trioxide is to be calculated.
Concept introduction:
A mole is the amount of substance that has Avogadro’s number of particles
One mole of atom or molecule is equal to
Answer to Problem 22E
The mass of sulfur trioxide is
Explanation of Solution
The mass of sulfur trioxide is calculated by the formula shown below.
Where,
•
The value of molar mass of sulfur trioxide is
Substitute the value of molar mass of sulfur trioxide in equation (1).
The mass of sulfur trioxide is
(d)
Interpretation:
The mass of nitric oxide is to be calculated.
Concept introduction:
A mole is the amount of substance that has Avogadro’s number of particles
One mole of an atom or molecule is equal to
Answer to Problem 22E
The mass of nitric oxide is
Explanation of Solution
The mass of nitric oxide is calculated by the formula shown below.
Where,
•
The value of molar mass of nitric oxide is
Substitute the value of molar mass of nitric oxide in equation (1).
The mass of nitric oxide is
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Chapter 8 Solutions
Introductory Chemistry: Concepts and Critical Thinking (8th Edition)
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- Which of the following is a molecular compound? (a)NaCl (b) NaOH (c) FePO4 (d) LiF (e) H2Oarrow_forward(11) Name this substance. (c) An unknown atom has 20 neutrons. Its mass is 6.138 x10-23 g. (i) (ii) Determine the chemical symbol of the atom. Show all your calculations. Name this substance.arrow_forwardA 1.30 g sample of titanium chemically combines with chlorine gas to form 5.16 g of titanium chloride. (a) What is the empirical formula of titanium chloride? (b) What is the percent by mass of titanium and the percent by mass of chloride in the sample?arrow_forward
- In a 3.7-gram sample, there are (A) 1.1 x 10 atoms of gold (B) 3.2 x 10 atoms of gold (C) 4.4 x 105 atoms of gold (D) 3.1 x 1026 atoms of gold atoms of gold (Au). 5.arrow_forward(b) A certain element has two naturally occurring isotopes. The mass of one of the isotopes is 106.905 amu and its natural abundance is 51.60%. The mass of the second isotope is 108.883 amu. Calculate the average atomic mass Write the chemical symbols of the isotopes (c) An organic compound consists of carbon, hydrogen and sulfur only. The percentage of carbon by mass in this compound wąs found to be 30.27%. The complete combustion of 1.367 g this compound produces 1.765 g of sulfur dioxide (SO2) (i) Determine the empirical formula for this compound. (ii) If a sample of this compound having the mass 3.781 x 103 mg contains 9.528 x 10-3 moles of the compound, determine the molecular formula.arrow_forwardMagnesium oxide (MgO) forms when the metal magnesium burns in air. (a) If 1.44 g of MgO contains 0.870 g of Mg, what is the mass ratio of magnesium to magnesium oxide? Mg to MgO (b) How many grams of Mg are in 666 g of MgO? g Mgarrow_forward
- What is the average mass (in grams) of a single carbon dioxide molecule? (a) 3.8 × 10-26 g (b) 7.31 × 10 23 (c) 2.65 × 1025 (d) 44.01 g 8,arrow_forward3. (a) Magnesium oxide was formed when the metal burns in air. (i) If 1.25 g of magnesium oxide contains 0.754 g of magnesium, determine the mass ratio of magnesium magnesium oxide. (ii) Calculate the weight of magnesium in 534 g of magnesium oxide.arrow_forwardQ 6. Calculate the molar mass of the following substances. (a) Ethyne, C2H2 (b) Sulphur molecule, S8arrow_forward
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