Chapter 1
Chapter 4
Chapter 3
100
Write 4,500,000 in scientific notation.
4.5x106
100
Which of the following is a homogeneous mixture?
A) Oil and water
B) Salt water
C) Sand and iron filings
D) Trail mix
B: salt water
100
What are valence electrons? How many does the element 1s22s22p63s23p2 have?
Valence electrons are the electrons in the outermost shells. Silicon has 4 valence electrons.
200
Which of the following is the correct scientific notation for the number 0.00057?
A. 5.7×103
B. 5.7×10−3
C. 5.7×10−4
D. 5.7×104
C
200
The temperature of a 250.0-g ball of Iron (0.450 J/g C) increases from 19.0 C to 32.0 C. How much heat did the iron ball gain in kJ?
1.4625 kJ
200
An isotope of chlorine is written as 1737Cl.
How many protons does this isotope have?
How many neutrons does this isotope have?
How many electrons does this isotope have?
Protons = 17
Neutrons = 20
Electrons = 17
300
The temperature outside is 25°C. What is the equivalent temperature in Fahrenheit?
77 degrees Fahrenheit
300
Based on the graph, at what point would the particles be moving quickly (almost bouncing off each other). Additionally, what is the boiling point?
The top slanted line, gas phase
90 degrees Celsius
300
What orbital does the following image represent?
D orbital
400
Based on the following equations, what does x equal?
x−3=y
2y+x=12
6
400
A serving of peanut butter contains 8 grams of fat, 6 grams of protein, and 4 grams of carbohydrate. What is the total amount of nutritional Calories (Cal) in one serving of peanut butter?
Note:
Carbohydrate = 4 kcal/g
Fat = 9 kcal/g
Protein = 4 kcal/g
112 kcal
400
Arrange the following elements in order of decreasing atomic size.
C, Ge, Pb, Si
Pb, Ge, Si, C
500
A compound is found to contain 12.01 g of carbon (C), 2.02 g of hydrogen (H), and 15.99 g of oxygen (O).
Calculate the percent composition of oxygen in the compound.
53.27%
500
A 50.0 g piece of aluminum (specific heat capacity = 0.897 J/g·°C) absorbs 720 J of heat energy. Its final temperature is measured to be 57.0 °C. What was the aluminum’s initial temperature in Kelvin?
314 K
500
Which of the following orbital diagrams is correct?
E (last one)