Quiz I (10-11)
Chem 171
Name___Key_________
(oF -320F) x (50C/90F) = 0C
1)
Provide the element name or element symbol as required for the following:
a) Ti _titanium_
2)
b) Li _lithium__
4)
5)
b) time ___F___
c) pressure ___D____
d) temperature ___F___
a) What is the name of the SI unit for mass?
___kilogram
b) What is the abbreviation for the SI unit for amount?
___mol____
-9
a) What is the name of the SI prefix that has the numerical value of 10 ?
___nano___
b) What is the numerical value of the SI prefix milli?
____10 ___
-3
Perform the following unit conversions:
-3
10
a) 9.0 g = _9 x 10 _ kg
𝟗. 𝟎 𝒈 𝒙
𝒌𝒈
𝟏𝟎𝟑 𝒈
b) 1.2 mmol/s = _7.2 x 10
𝟏.𝟐 𝒎𝒎𝒐𝒍
=
𝒔
7.0 cm 𝒙
𝟏𝟎−𝟐 𝒎
𝒄𝒎
𝒙
µ𝒎
𝟏𝟎−𝟔 𝒎
𝒙
𝟔𝟎 𝒔
𝒎𝒊𝒏
𝒙
-9
= 72 x 10 _ pmol/min
𝟏𝟎−𝟑𝒎𝒐𝒍
𝒎𝒎𝒐𝒍
O
c) 7.0 cm = ____________ µm
6)
d) argon __Ar__
On the line beside each quantity, indicate if it is a fundamental unit (F) or a derived quantity (D).
a) density _D__
3)
c) copper _Cu__
𝒙
𝒑𝒎𝒐𝒍
𝟏𝟎−𝟏𝟐 𝒎𝒐𝒍
=
o
d) 333 K = _60_ C = _140__ F
=
333 – 273.15 = 59.85
3
The density of egg nog is 0.984 is 1.056 g/cm .
𝟓𝟗. 𝟖𝟓 𝒙
𝟗𝑭
𝟓𝑪
+ 𝟑𝟐 =
3
What volume, in cm , would have a mass of 25.0 g? __23.4 cm 3___
What is the volume in m3?
𝟐𝟓. 𝟎 𝒈 𝒙
7)
𝒄𝒎𝟑
𝟎.𝟗𝟖𝟒 𝒈
= 𝟐𝟑. 𝟒 𝒄𝒎𝟑
𝟐𝟑. 𝟒 𝒄𝒎𝟑 𝒙 (
𝟏𝟎−𝟐 𝒎 𝟑
)
𝒄𝒎
_2.34 x 10-5 m3_
= 𝟐𝟓. 𝟒 𝒙 𝟏𝟎−𝟔𝒎𝟑 = 𝟐. 𝟑𝟒 𝒙 𝟏𝟎−𝟓𝒎𝟑
Indicate whether each statement below is a chemical (C) change or a physical (P) change.
oxidation of iron atoms (Fe) to form iron ions (Fe2+)
converting the starch in rice to CO2 and H2O by combustion with O2
allowing dry ice, CO2 (s) to warm and form CO2 (g)
putting your cell phone in rice to remove water after you dropped it in the lake
8)
_____C____
_____C_____
_____P_____
_____P_____
Each statement below supports a chemical law. Place the letter (a, b, or c) of the corresponding law in the blank.
a) Law of Conservation of Mass
b) Law of Definite Proportions
c) Law of Multiple Proportions
__b___ A 4.00 g sample of a compound consists of 2.000 g O, 1.750 g C, and 0.250 g H. A 2.000 g sample of the same compound
consists of 1.000 g O, 0.825 g C and 0.125 H.
_a___ If 0.60 g of compound A is reacted with 1.400 g compound B, 0.70 g of compound C and 1.30 g compound D are recovered..
__c__ In compound A, 0.15 g O is combined with 1.0 g Cl. In compound B, 0.30 g O is combined with 1.0 g Cl. In
compound C, 0.90 g O is combined with 1.0 g Cl.
9)
a) Provide an element
a) alkali metal _Na, K, Li, Rb, Cs
b) halogen _F, Cl, Br, I_
c) transition metal _many_
10)
Consider an atom that has an atomic number of 25 and a mass number of 55.
a) What is the element name of this atom?
b) How many neutrons does this atom have?
c) How many electrons would a +2 ion of this element have?
11)
__manganese__
____30_______
_____23_______
Indicate the charge that would be present on an ion of each element below. If more than one charged type of ion can be formed,
place a V on the line.
a) Br __-1__
b) Sr _+2_____
c) Ga __+3____
d) Ti __V____
e) Zn __+2__
f) Pd __V____
g) Ag __+1____
h) Ru __V___