CH111 Midterm 1 Review

Sig Figs

100

How many sig figs are in this number:

6.789

What is 4?

200

How many sig figs are in this number: 

2.05815

What is 6?

300

How many sig figs are in this number:

.0000610000

What is 6?

400

How many sig figs will be in the final answer of this problem:

4.567240*1.0789

What is 5?

500

What is the answer to this equation with the correct amount of sig figs: 

5.493341 x 70.5083

What is 387.326?

Scientific Notation

100

What is .00000000009 in scientific notation?

What is

9.0*10^-11

200

What is the scientific notation form of 17680000?

What is 

1.768*10^7

300

What is the answer of the following equation in the correct scientific notation?

5.89*10^8*4.98*10^4

What is 

2.93*10^13

400

What is the answer of the following equation in the correct scientific notation?

(18.74*10^12)/(12.345*10^10)

What is

1.518*10^2

500

What is the answer to the equation:

(3.69*10^5)*(9.5*10^6)

What is 

3.5*10^12

Dimensional Analysis

100

A solution has a mass of 12.8g and a volume of 8.9mL. What is the density?

What is 1.4 g/mL?

200

You have 34.5kg of Au. How much Au do you have in micrograms?

What is 

3.45*10^10

300

A solution composed of 12.5g Mg and 20.4g Na have a total volume of 5.0mL. What is the density of the solution?

What is 6.6 g/mL?

400

In a fake city called Chemlandia, the plu system is used. Two units in the plu system are related to thier counterparts in the SI system of unites according to:

7.9 blob = 3.2 meter           15 prat = 48 second

Express 

38.0 (blob)/(prat^2) in SI units

What is 1.5 meters per seconds squared?

500

You need to find the total amount of A in the 20 mL solution of AB. The solution contains 3.2 mg of A per mL. What is the amount of A in grams?

What is 0.064 g?

Matter/Atoms

100

Which of the following is a heterogeneous mixture?

a) sugar water

b) sand in water

c) gatorade

d) vinegar

b) sand in water

200

Order the phases of matter based on average separation of molecules/atoms. (Least to Greatest)

Solid < Liquid < Gas

300

Separate the terms into physical and chemical properties.

Flammability, malleability, acidity, reactivity, hardness, conductivity

Physical: Malleability, hardness, conductivity

Chemical: Flammability, acidity, reactivity

400

Which element is most likely to have similar chemical properties to Cl?

a) K

b) Ag

c) I

d) Ar

c) I

500

I react 10 grams of H₂ with 20 grams of O₂ and end up with 29 grams of H₂O. Assuming I captured and measured all products which law was violated?

H₂+2O₂--> 2H₂O

Law of conservation of mass.