Deck 5 (81 - 100) Flashcards
1
Q
- A bond between metal and non-metal is generally:
a. hydrogen
b. metallic
c. ionic
d. covalent
A
c. ionic
2
Q
- Vinegar tastes sour because of ?
A
ethanoic acid
3
Q
- How many nitrogen atoms are in 28g of nitrogen molecule?
Ar(N) = 14
A
12.044 x 10*23
4
Q
- The products of the reaction between methanol and ethanoic acid are ?
A
methyl ethanoate and water
5
Q
- How many atoms are in 3.50 mol of calcium?
A
2.10 x 10*24
6
Q
- Give the name to:
H3C-CH2-CH2-CH2-COOH
A
pentanoic acid
7
Q
- What is the molar concentration of a 100.00 ml aqueous solution that contains 1.00 g KCl?
Mm(KCl) = 74.55 g.mol-1
a. 1.34 mol.dm-3
b. 0.134 mol.dm-3
c. 0.0134 mol.dm-3
d. 0.00134 mol.dm-3
A
b. 0.134 mol.dm-3
8
Q
- What is the only metal that is in liquid form at room temperature ?
A
mercury
9
Q
- The atom has atomic number 17 and a mass number 37. How many neutrons does the atom contain?
A
20
(37 - 17)
10
Q
- In the reaction represented by the following equation a conjugate acid-base pair is:
HF(aq) + H2O(l) <-> H3O+(aq) + F-(aq)
a. F- and H2O
b. HF and F-
c. H3O+ and HF
d. HF and H2O
A
b. HF and F-
11
Q
- An anion is a —– charged ion
A
negatively
12
Q
- What are the products of the decomposition of mercury(II) oxide ?
A
Hg and O2
13
Q
- Acids have a pH level below 7. True or false?
A
true
14
Q
- Give the name to:
H3C-CH2-COOH
A
propionic acid
15
Q
- A strong base in an aqueous solution:
a. is a weak electrolyte
b. produces many H+ ions
c. will not dissolve
d. completely dissociates into ions
A
d. completely dissociates into ions
