CHEM 1020 - Exam 1 ACTUAL UPDATED QUESTIONS AND CORRECT ANSWERS
homogeneous Uniform/same composition throughout the mixture.
heterogeneous. Different compositions in different parts of the mixture).
Physcial change properties that can be observed and measured without changing the
composition of a substance
Chemical change properties involving the formation of new substances
, A sealed flask containing a clear liquid is left sitting by the 1. physcial
window on a sunny day. A student recorded the following 2. chemical
observations. Identify each observation as either a 3. chemical
chemical or physical change:
1. After an hour, droplets of clear liquid form on the wall
of the flask?
2. After two hours, the liquid turns yellow and a few
bubbles rise through the liquid?
3. After sitting by the window for the whole day, the liquid
becomes clear again.
Formula for Density D=m/v
What is the density of mercury if 100.0 grams occupies a 13.6 g/mL
volume of 7.36 mL?
Formula for volume V=M/D
An irregularly shaped piece of titanium metal weighs 81.3 Volume formula: V=m/d
g. After it is placed into a graduated cylinder and
becomes completely submerged under water, the Answer= 35.0 ML
reading of the water level in the cylinder is 53.1 mL. What
is the initial volume of water in the graduated cylinder?
The density of titanium is 4.50 g/cm^3
Formula for mass M=DV
Which of the following is an element? E
A. Fe
B. Ne
C. O2
D. A and B only
E. A, B and C
Formula for Fahrenheit F=9/5C-32
The record low temperature in Laramie, WY was set on -49.9 degree F
Jan. 12, 1963 when the mercury fell to -45.5 degrees
Celcius. What is the record low temperature in Laramie in
Fahrenheit?
Formula for Celcius C=(F-32)/(5/9)
Normal body temperature is 98.6 Fahrenheit, wha tis it in 37 C
C
Formula for Kelvin K=C+273
What is the absolute zero (0 K) in the Celsius and -273.15 C and -459.67 F
Fahrenheit Scale, respectively
homogeneous Uniform/same composition throughout the mixture.
heterogeneous. Different compositions in different parts of the mixture).
Physcial change properties that can be observed and measured without changing the
composition of a substance
Chemical change properties involving the formation of new substances
, A sealed flask containing a clear liquid is left sitting by the 1. physcial
window on a sunny day. A student recorded the following 2. chemical
observations. Identify each observation as either a 3. chemical
chemical or physical change:
1. After an hour, droplets of clear liquid form on the wall
of the flask?
2. After two hours, the liquid turns yellow and a few
bubbles rise through the liquid?
3. After sitting by the window for the whole day, the liquid
becomes clear again.
Formula for Density D=m/v
What is the density of mercury if 100.0 grams occupies a 13.6 g/mL
volume of 7.36 mL?
Formula for volume V=M/D
An irregularly shaped piece of titanium metal weighs 81.3 Volume formula: V=m/d
g. After it is placed into a graduated cylinder and
becomes completely submerged under water, the Answer= 35.0 ML
reading of the water level in the cylinder is 53.1 mL. What
is the initial volume of water in the graduated cylinder?
The density of titanium is 4.50 g/cm^3
Formula for mass M=DV
Which of the following is an element? E
A. Fe
B. Ne
C. O2
D. A and B only
E. A, B and C
Formula for Fahrenheit F=9/5C-32
The record low temperature in Laramie, WY was set on -49.9 degree F
Jan. 12, 1963 when the mercury fell to -45.5 degrees
Celcius. What is the record low temperature in Laramie in
Fahrenheit?
Formula for Celcius C=(F-32)/(5/9)
Normal body temperature is 98.6 Fahrenheit, wha tis it in 37 C
C
Formula for Kelvin K=C+273
What is the absolute zero (0 K) in the Celsius and -273.15 C and -459.67 F
Fahrenheit Scale, respectively
