Chapter 1

Question 1

What is the difference between quantitative and qualitative data?

Answer 1

Quantitative = numerical (e.g., 95°C); Qualitative = descriptive (e.g., red solution).

Question 2

What is a chemical property?

Answer 2

One that changes the composition/identity of the substance (e.g., burning hydrogen).

Question 3

What is an intensive property?

Answer 3

Does not depend on the amount (e.g., density, taste).

Question 4

What is an extensive property?

Answer 4

Depends on the amount (e.g., mass, volume).

Question 5

What is the Kelvin to Celsius conversion?

Answer 5

K = °C + 273.15

Question 6

Are leading zeros significant? Are trailing zeros after a decimal point significant?

Answer 6

No, Yes

Question 7

When adding or subtracting sig figs, what do you do to the exponent?

Answer 7

• same exponents, add/sub
• different exponent, convert to same

Question 8

When multiplying or dividing sig figs, what do you do to the exponent?

Answer 8

• multiplying, add exponent
• dividing, subtract exponent

Question 9

What is Accuracy?

Answer 9

How close a measurment is to its true value

Question 10

What is Precision?

Answer 10

How close a set of measurements are to each other