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Chemistry > Deck 1 (1 - 20) > Flashcards

Deck 1 (1 - 20) Flashcards

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1
Q
  1. What is the pH of a solution whose pOH was 10?
A

pH = 4

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2
Q
  1. What is the percent composition by mass of sulfur in ammonium sulphate?
    Mm(S) = 32 g.mol-2
    Mm((NH4)2SO4) = 132 g.mol-2

a. 6.7%
b. 24%
c. 28%
d. 32%

A

b. 24%

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3
Q
  1. IUPAC name of compound - check book
A
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4
Q
  1. Which of the following sublevels is the lowest in energy according to the Aufbau principle?

a. 3d
b. 4s
c. 4p
d. 5s

A

b. 4s

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5
Q
  1. What is the term for a water molecule that gains an extra hydrogen ion?
A

hydronium ion

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6
Q
  1. IUPAC
A
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7
Q
  1. Which of the following formulas is most likely to be correct for hydrosulfuric acid?

a. H2SO4
b. H2S
c. H2SO3
d. SO42-

A

b. H2S

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8
Q
  1. The chemical equation shows the production of calcium oxide and carbon dioxide.

CaCO3 —> CaO + CO2

The reaction should be classified as:

a. decomposition
b. composition
c. single replacement
d. double replacement

A

a. decomposition

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9
Q
  1. The charge of a neutron is:

a. positive
b. negative
c. neutral
d. none of the above

A

c. neutral

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10
Q
  1. How many stages of ionisation does phosphoric acid go through?
A

3

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11
Q
  1. PIC
A
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12
Q
  1. Which part of an atom is most directly involved in formation of a chemical bond?
A

electron

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13
Q
  1. The electron configuration notation for the element of atomic number 5 is:

a. 1s2 2p3
b. 1s5
c. 1s2 2s2 2p1
d. 1s2. 2s1. 2p2

A

c. 1s2 2s2 2p1

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14
Q
  1. The atomic number of an element is equal to …
A

the number of electrons in the atom

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15
Q
  1. PIC
A
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16
Q
  1. 250g of 50% HNO3 were diluted with 150g of water. Calculate the mass percentage of diluted acid
A

W = 31.25 %

17
Q
  1. A bond that occurs between non-metal and non-metal is called a/an?
A

covalent bond

18
Q
  1. How many valence electrons are in the atom of sulphur 16S ?
A

6

19
Q
  1. What is the numerical value of atomic mass unit?
A

1.66 x 10*27 kg

20
Q
  1. Neutralisation is the chemical process in which …
A

hydrogen ions react with hydroxide ions to form water

Chemistry (25 decks)

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