Lecture 1

Question 1

What is the definition of density?

Answer 1

mass at a certain volume

Question 2

How do you convert to kelvin from celsuis?

Answer 2

Tk= tc+273.15

Question 3

how do convert from F to C

Answer 3

c= 5/9( F-32)

Question 4

What is precision?

Answer 4

how close together different measurements are

Question 5

What is accuracy?

Answer 5

how close measurement is to actual result

Question 6

True or false: leading zeros count (015)

Answer 6

false

Question 7

T or F: captive zeros count

Answer 7

True

Question 8

T or F: trailing zeros only count if there is a decimal place

Answer 8

150. True

Question 9

What is avogrado’s number?

Answer 9

6.022x10^ 23

Question 10

With multiplication and division do you take the lowest sig fig?

Answer 10

Yes. 4.56x 1.4= 6.36 –> 6.4

Question 11

With addition and subtraction do you take the same sig fig as the decimal places of the least precise?

Answer 11

Yes 1.3+ 12.225+10.45= 12.975–> 13.0

Question 12

What is the scale of which a measurement is made?

Answer 12

A unit

Question 13

What is the unit for an amount of a substance

Answer 13

mol

Question 14

What is the equation for speed?

Answer 14

distance/ time