WorksheetsChemistry pre-assessment 1
Total questions: 15
Worksheet time: 1hrs 5mins
A table showing data on four different substances is provided. Each substance was placed in two containers. Container #1 has a cube shape, and Container #2 has a spherical shape. Which of the four substances was in the gaseous state?
Substance A
Substance B
Substance C
Substance D
Which of the following is true regarding the particle nature of a solid? Particles in a solid -
move very little, so it cannot easily change its shape.
are relatively far apart, so it is highly compressible.
are in continual motion, and can slide past each other.
are very far apart, so it can easily change its shape.
Elements in which group have eight valence electrons?
Alkali metals
Alkaline earth metals
Halogens
Noble gases
Which of the following shows the correct Lewis Dot structure for carbon?
Which of the following is the correct electron configuration for a neutral nitrogen atom?
1s22s22p3
1s22s22d3
1s22s62p3
1s22s12p1
Which of the following is the correct formula for calcium chloride?
CaCl
CaCl2
Ca2Cl
2CaCl
A table with information about four elements is provided. Which element has 22 protons?
Sodium
Calcium
Titanium
Magnesium
An atom of an element has 12 protons. How many electrons does the atom have if it has a charge of positive 2 (+2)?
2
10
14
24
A portion of the Periodic Table of Elements is shown.
Which element would be expected to have a reactivity similar to that of phosphorus?
Nitrogen
Oxygen
Fluorine
Chlorine
Which of the following accurately describes the number of magnesium (Mg) and chlorine (Cl) atoms in the chemical formula 4MgCl2
4 atoms of magnesium and 2 atoms of chlorine
4 atoms of magnesium and 8 atoms of chlorine
8 atoms of magnesium and 2 atoms of chlorine
2 atoms of magnesium and 4 atoms of chlorine
What is the density of an object that has a mass of 13.5 g and a volume of 7.2 mL? Use the formula: D=M/V
55 g/mL
3.9 g/mL
1.9 g/mL
0.1 g/mL
A sample of an ideal gas has a volume of 14.2 L at a pressure of 1.2 atm. If the gas pressure is increased to 1.8 atm, what is the new volume? This problem uses Boyle's law:
P1V1= P2V2 pressure 1 X volume 1 = pressure 2 X volume 2
All the variables are known except for V2, so the equation needs to be rearranged to solve for the one unknown. We can do this by dividing both sides by P2
V2= 9.5L
V2= 13.7L
V2= 29.2L
V2= 2.1L
I have a sample of contaminated water that contains 46600000 molecules of lead. Please convert the number of molecules to scientific notations.
46,600,000
0.466 x 108
466 x 105
4.66 x 107
Jonathan can jog at 5 mph for up to 4 hours. How long will it take him to jog the 13 miles from his house in Midland Tx to his friends house in Odessa Tx?
3.2 hours
2.6 hours
6.5 hours
1.9 hours
This summer I'm taking my family to Disney world. The drive is 16 hours and 53 minutes. the distance is 1,105 miles. I need to decide how much money to save up for this trip. My car is pretty efficient and gets 30 mpg. I'm going to overestimate the cost of gas and plan for bad gas prices. I'm going to assume it will be $3 a gallon at every gas station even though it will likely be less. All the other costs are planned for. How much money do I need for gas just to get to Disney World?
$135.25
$36.83
$110.50
$90.76
