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Chemistry > Deck 21 ( 401 - 420) > Flashcards

Deck 21 ( 401 - 420) Flashcards

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1
Q
  1. PIC
A
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2
Q
  1. What salt is formed in the following acid/base reaction?

HClO3 + Ba(OH)2 -> ???

a. BaCl2
b. BaClO3
c. H2O
d. Ba(ClO3)2

A

Ba(ClO3)2

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3
Q
  1. Proteins are made up of individual monomers called ?
A

amino acids

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4
Q
  1. Balance the equation:

_H2(g) + _N2(g) -> _NH3(g)

A

3H2(g) + N2(g) -> 2NH3(g)

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5
Q
  1. Which of these processes is an example of a chemical change?

a. methane is burned in air
b. solid gold is melted to make jewellery
c. a bar of copper is stretched into a long copper wire
d. iron is coated with bronze to prevent rusting

A

methane is burned in air

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6
Q
  1. PIC
A
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7
Q
  1. Oils do not dissolve in water because …
A

oils are non-polar and water is polar

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8
Q
  1. PIC
A
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9
Q
  1. 1 umol is:

a. 10-3 mol
b. 10-6 mol
c. 10-9 mol
d. 106 mol

A

10*-6 mol

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10
Q
  1. PIC
A
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11
Q
  1. In a solution of sugar and water, the solvent is the:

a. sugar
b. water

A

water

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12
Q
  1. Which of these molecules is a protein?

a. collagen
b. cellulose
c. lysine
d. lanolin

A

collagen

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13
Q
  1. Write the usual valence associated with nitrogen in covalent compounds
A

+ III (+3)

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14
Q
  1. What is the IUPAC name of the following hydrocarbon?

H2C=CH-CH3

A

propene

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15
Q
  1. What is the symbol for gold?
A

Au

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16
Q
  1. Draw structural formula of peptide bond
A

-CO-NH-

17
Q
  1. Consider the two equations below. They illustrate that water is:

H2SO4(aq) + H2O(l) -> H3O+(aq) + H2SO4- (aq)

NH3(g) + H2O(l) -> NH4+(aq) + OH- (aq)

a. an acid in both reactions
b. a base in both reactions
c. amphiprotic
d. a weak electrolyte

A

amphiprotic

18
Q
  1. Complete the following reaction:
    hydrogenation
    H2C=CH2 ————————>
A

hydrogenation
H2C=CH2 ————————> H3C-CH3

19
Q
  1. What is the first element of the periodic table?
A

hydrogen

20
Q
  1. Give the name of arbitrary hydroxy amino acid
A

threonine, serine, tyrosine

Chemistry (25 decks)

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