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Teas Test > Describe Chemical Reactions 3.3 > Flashcards

Describe Chemical Reactions 3.3 Flashcards

1
Q

Which of the following is correct?

A

C6H12O6

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2
Q

Which of the following appropriately balances the following chemical equation?
CO2 + H2 - CH4 + H20

A

CO2+4H2 —— CH4 + 2H2O

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3
Q

In the following reaction, which of the following elements loses two electrons?
2HCI + Mg -+ MgCl2 + H2

A Mg
B C
C H
D None

A

Mg

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4
Q

When you see the chemical equation
3Ca + N2 - Ca3N2, which of the following is how would you describe it in words?

A Calcium nitride reacts in a decomposition reaction, forming calcium and nitrogen.

B Calcium and nitrogen are equivalent to calcium nitride.

C Calcium and nitrogen react to form calcium nitride.

D There is no reaction between calcium and nitrogen.

A

C Calcium and nitrogen react to form calcium nitride.

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5
Q

Which of the following statements is correct?

A A mole is a quantitative unit, like a dozen.

B Compounds can be weighed out on a mass balance in moles.

C A mole of Fe contains a different number of atoms as a mole of I.

D A mole measures 6.022 particles.

A

A A mole is a quantitative unit, like a dozen.

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6
Q

Which of the following substances is held together by ionic bonds?

H20
LiCl
CH3CH2OH
N2

A

LiCl

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7
Q

Which of the following appropriately balances the following chemical equation?
CH3NH2 + H20 - CH4 + CO2 + NH3

A

B 4CHaNH2 + 2H20 - 3CH4 + COz + 4NH3

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8
Q

Which of the following is correct about the numbers in front of the formulas in this reaction:
3Ca + N2 -+ Ca3N2?

A 3 grams of calcium are reacting with 2 grams of nitrogen.

B The coefficients represent the relative amounts of the reactants and products.

C One of the reactants is a compound that has 3 calcium atoms in it

D There are 3 calcium atoms reacting with 3 nitrogen molecules.

A

B The coefficients represent the relative amounts of the reactants and products.

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9
Q

In the following reaction, what which of the following units represents all the coefficients?
Mg(OH)2 + 2HCOOH -* Mg(COOH)2 + 2H20

A Grams
B Milliliters
C Atomic mass units
D Moles

A

Moles

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10
Q
  1. Which of these elements have the same number of valence electrons and similar chemical properties as strontium (Sr)? Use the periodic table to help you answer the question.
    A. Magnesium (Mg)
    B. Rubidium (Rb)
    C. Oxygen (O)
    D. Neon (Ne)
A

Magnesium (mg)

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11
Q
  1. Which of the following substances are ionic compounds?
    (Select all that apply.)
    A. H2O
    B. CO2
    C. NH3
    D. KCl
    E.NaCI
A

D KCl
E NaCl

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12
Q
  1. Which of the following sets of coefficients balances the following chemical reaction? _N2 + _H2 > _NH3
    A 1, 3, 2
    B. 1, 1, 1
    C. 2, 3, 1
    D. 3, 2. 1
A

A 123

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13
Q
  1. How many oxygen atoms are present on each side of the following reaction? 2C2H18+2502 + 16C02+18H20
    A. 25
    B.34
    C 50
    D. 32
A

50

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14
Q
  1. For the reaction CO + H2 =* CH4 + H20 + heat, equilibrium would favor the reactant side if which of the following occurs?
    A H2O is added
    B. The temperature decreases
    C. CO is added
    D. CHa is removed
A

H2O is added

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15
Q
  1. Which of the following would increase the forward rate of this gas phase reaction?
    CO + H2 => CH4 + H20 + heat
    A. Adding CO
    B. Increasing the temperature
    C. Adding H20
    D. Increasing the pressure
A

Adding CO

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16
Q
  1. A substance that lowers the activation energy is which o the following?
    A Reactant
    B. Product
    C Catalyst
    D. Time
A

Catalyst

17
Q
  1. Which of the following would slow down a reaction rate
    A. Increasing the temperature
    B. Adding enzymes
    C. Decreasing the pressure
    D. Decreasing the reactants
A

Decreasing the pressure

Decreasing the reactants

18
Q
  1. An enzyme does which of the following to a chemical reaction?
    A. Shifts the reaction to the right
    B. Shifts the reaction to the left
    C Speeds up both the forward and reverse reactions
    D. Changes the reaction from one that is at equilibrium to one that goes to completion
A

Speeds up both the forward and reverse reactions

Teas Test (29 decks)

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