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karla
karla asked in Science & MathematicsChemistry · 1 decade ago

PLEZZ HELPP ME TO CHOOSE THE BEST ANSWER FOR Q's IN CHEM!!!!?

1. Electron configurations show all of the following except the

A. numbers of electrons in an atom

B. location of the electrons in an atom

C. numbers of neutrons in an atom

D. filling order of electrons

2. What is the molarity of a solution prepared by dissolving 11.5 g of solid NaOH in enough water to make 1.50 L of solutions?

A. 0.384 mol/L

B. 0.128 mol/L

C. 0.192 mol/L

D. 0.346 mol/L

3. What volume of 16 M sulfuric acid must be used to prepare 1.5 L of a 0.10 M H2SO4 solution? (Hint: think dilution)

A. 9.4 times 10 to the -3 power L

B. 1.9 times 10 to the -2 power L

C. 3.1 times 10 to the -3 power L

D. 3.8 times 10 to the -2 power L

4. Which of the following is insoluble in water?

A. NaOH

B. AgCl

C. Ca(NO3)2

D. PbSO4

5. Airplanes usually fly approximately 20 miles above the ground because of the absence of stormy conditions. What layer of the atmosphere is this?

A. troposphere

B. ionosphere

C. ozone layer

D. stratosphere

6. All of the following are physical sources of energy except

A. wood

B. hydroelectric

C. geothermal

D. wind

7. All of the following are renewable sources of energy except

A. wood

B. municipal waste

C. ethanol from plants

D. natural gas

8. The pollution of water with heat by nuclear power plants lowers oxygen levels available for aquatic life. This type of pollution is known as

A. the greenhouse effect

B. toxic waste solutions

C. thermal pollution

D. pyrolysis

9. All of the following are carbohydrates except

A. sugar

B. cellulose

C. starch

D. glycerin

10. Molecules that serve as the building blocks of plant and animal tissues are known as

A. carbohydrates

B. proteins

C. lipids

D. nucleic acid

11. How much more acidic is a substance with a pH of 3 than a substance with a PH of 5?

A. 10 times more acidic

B. 1000 times more acidic

C. 100 times more acidic

D. it is less acid

12. What is the pH of a solution with a hydrogen ion concentration of 1.0 times 10 to the -9 power M?

A. 9

B. 3

C. 6

D. 1

13. The pH of blood is about 7.4. What is the pOH of blood?

A. 6.6

B. 7.0

C. 14

D. 7.4

14. The pH of rainwater in a polluted area was found to be 3.50. What is the [H+] concentration?

A. 1.6 times 10 to the power of -4 M

B. 6.4 times 10 to the power of -4 M

C. 8.0 times 10 to the power of -5 M

D. 3.2 times 10 to the power of -4 M

PLEZZZZZZ DO AS MANT AS U CAN.

THANK U SO MUCH :)

2 Answers

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  • Steve O
    Lv 7
    1 decade ago
    Favorite Answer

    with this many questions,

    unless you email asking for explanations

    i am just giving answers:

    1. Electron configurations show all of the following except the

    C. numbers of neutrons in an atom

    =============================================

    2. What is the molarity of a solution prepared by dissolving 11.5 g of solid NaOH in enough water to make 1.50 L of solutions?

    C. 0.192 mol/L

    ==================================================================

    3. What volume of 16 M sulfuric acid must be used to prepare 1.5 L of a 0.10 M H2SO4 solution? (Hint: think dilution)

    A. 9.4 times 10 to the -3 power L

    ==================================================================

    4. Which of the following is insoluble in water?

    both

    B. AgCl

    D. PbSO4

    =============================================================

    5. Airplanes usually fly approximately 20 miles above the ground because of the absence of stormy conditions. What layer of the atmosphere is this?

    D. stratosphere

    ==============================================================

    6. All of the following are physical sources of energy except

    A. wood

    =================================================

    7. All of the following are renewable sources of energy except

    they likely want you to say D. natural gas

    but the natural gas in your home is methane... which can be produced by manure or municipal waste

    ======================================================================

    8. The pollution of water with heat by nuclear power plants lowers oxygen levels available for aquatic life. This type of pollution is known as

    C. thermal pollution

    ========================================

    9. All of the following are carbohydrates except

    D. glycerin

    ===================================================================

    10. Molecules that serve as the building blocks of plant and animal tissues are known as

    A. carbohydrates for plant tissue

    B. proteins for animal tissue

    =============================================================

    11. How much more acidic is a substance with a pH of 3 than a substance with a PH of 5?

    C. 100 times more acidic

    ====================================================

    12. What is the pH of a solution with a hydrogen ion concentration of 1.0 times 10 to the -9 power M?

    A. 9

    =================================================

    13. The pH of blood is about 7.4. What is the pOH of blood?

    A. 6.6

    =====================================================

    14. The pH of rainwater in a polluted area was found to be 3.50. What is the [H+] concentration?

    D. 3.2 times 10 to the power of -4 M

    ================================================

  • Anonymous
    4 years ago

    a million. D 2. B 3. B 4. C 5. B 6. something is in basic terms no longer proper right here. 7. A 8. A 9. B 10. C I see all of us is asserting D on seven, yet Phosphorus has sixteen neutrons no longer 15. seem on the atomic mass and it is in lots of situations found out. 30.ninety 8-15(atomic type) = 15.ninety 8 or rounded as much as sixteen.

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