3. The total volume of seawater is 1.5 x 102¹ L. Assume that seawater contains 3.1% NaCl by mass (this means that there are 3.1 g NaCl in 100 g solution) and that its density is 1.03 g/mL, calculate the total mass of NaCl in the seawater in kilograms. Note that 1 kg = 1000 g.
3. The total volume of seawater is 1.5 x 102¹ L. Assume that seawater contains 3.1% NaCl by mass (this means that there are 3.1 g NaCl in 100 g solution) and that its density is 1.03 g/mL, calculate the total mass of NaCl in the seawater in kilograms. Note that 1 kg = 1000 g.
Introductory Chemistry: A Foundation
9th Edition
ISBN:9781337399425
Author:Steven S. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Donald J. DeCoste
Chapter15: Solutions
Section: Chapter Questions
Problem 38CR
Related questions
Question
100%
![3. The total volume of seawater is 1.5 x 1021 L. Assume that seawater contains 3.1% NaCl by mass
(this means that there are 3.1 g NaCl in 100 g solution) and that its density is 1.03 g/mL, calculate
the total mass of NaCl in the seawater in kilograms. Note that 1 kg = 1000 g.
4. Copy the table and fill in the blanks with the appropriate values, symbols and the like: (Note: You
can use a periodic table to locate the element.)
5.
6.
7.
8.
SYMBOL
protons
neutrons
electrons
net charge
Which of the following are:
(a) SO₂
(b) Sg
5
6
5
Write only the letter of your choice.
(c) Cs
(d) N₂O5
56
26
A. Molecules but not compounds
B. Compounds but not molecules
C. Both compounds and molecules
Which of the following has more atoms?
A. 1.10 g of hydrogen (H) atoms
B. 14.7 g of chromium (Cr) atoms
2+
Fe
CHEM01-(09-101P) Problem Set No. 1
(e)
(f) 0₂
o o
Which of the following has a greater mass?
A. 2.0 atoms of lead
B. 5.1 x 1023 mole lithium
16
18
- 3
79
117
79
(g)
CH4
(h) KBr
86
136
0
Write the letter of your choice and support your answer with computations. No solution, no
credit.
(i) P4
(₁) LiF
Calculate the number of C, H and O atoms in 1.50 g of glucose, C6H12O6. There should be 3
answers.
page 2
Write the letter of your choice and support your answer with computations. No solution, no
credit.
9. Stannous fluoride (SnF₂) is often added to toothpaste as an ingredient to prevent tooth decay.
What is the mass of fluorine (in grams) in 24.6 g of the compound?
10. Determine the mass percent composition of each element in calcium silicate CaSiO3.
11. A compound is found to contain 23.3% magnesium, 30.7% sulfur, and 46.0% oxygen. What is the
empirical formula of this compound?
12. The complete combustion of acetylene (C₂H₂) is described by the following reaction:
CzHz + Oz → CO2 + H2O
A. Balance the above equation with the lowest set of whole numbers.
B. If 2.35g C₂H₂ is burned with enough oxygen, how many grams of CO₂ will be formed?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9dc8a740-4a7c-4dc9-b4cf-ccdbbbe87dbe%2Ff8ee4f60-c6e4-49e6-b35e-9b308686b85e%2Fyz4ag0r_processed.jpeg&w=3840&q=75)
Transcribed Image Text:3. The total volume of seawater is 1.5 x 1021 L. Assume that seawater contains 3.1% NaCl by mass
(this means that there are 3.1 g NaCl in 100 g solution) and that its density is 1.03 g/mL, calculate
the total mass of NaCl in the seawater in kilograms. Note that 1 kg = 1000 g.
4. Copy the table and fill in the blanks with the appropriate values, symbols and the like: (Note: You
can use a periodic table to locate the element.)
5.
6.
7.
8.
SYMBOL
protons
neutrons
electrons
net charge
Which of the following are:
(a) SO₂
(b) Sg
5
6
5
Write only the letter of your choice.
(c) Cs
(d) N₂O5
56
26
A. Molecules but not compounds
B. Compounds but not molecules
C. Both compounds and molecules
Which of the following has more atoms?
A. 1.10 g of hydrogen (H) atoms
B. 14.7 g of chromium (Cr) atoms
2+
Fe
CHEM01-(09-101P) Problem Set No. 1
(e)
(f) 0₂
o o
Which of the following has a greater mass?
A. 2.0 atoms of lead
B. 5.1 x 1023 mole lithium
16
18
- 3
79
117
79
(g)
CH4
(h) KBr
86
136
0
Write the letter of your choice and support your answer with computations. No solution, no
credit.
(i) P4
(₁) LiF
Calculate the number of C, H and O atoms in 1.50 g of glucose, C6H12O6. There should be 3
answers.
page 2
Write the letter of your choice and support your answer with computations. No solution, no
credit.
9. Stannous fluoride (SnF₂) is often added to toothpaste as an ingredient to prevent tooth decay.
What is the mass of fluorine (in grams) in 24.6 g of the compound?
10. Determine the mass percent composition of each element in calcium silicate CaSiO3.
11. A compound is found to contain 23.3% magnesium, 30.7% sulfur, and 46.0% oxygen. What is the
empirical formula of this compound?
12. The complete combustion of acetylene (C₂H₂) is described by the following reaction:
CzHz + Oz → CO2 + H2O
A. Balance the above equation with the lowest set of whole numbers.
B. If 2.35g C₂H₂ is burned with enough oxygen, how many grams of CO₂ will be formed?
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