Chem 115 Exam 1

Significant Figures

100

What is the rule for addition/subtraction?

Round your answer to the least number of decimal places

200

How many significant figures are in 1.0000000000000

14 sf

300

What is the rule for multiplication/division

Round your answer to the least number of significant figures

400

How many significant figures should the answer have (1111.1+44.2)x(10101.101-0.9)

5 sf

500

What are the rules for determining the number of significant figures?

• All integers are significant

• Trailing zeros without a decimal are not significant 

• Trailing zeros after a decimal are significant

• Zeros between integers are significant

• Leading zeros are not significant

Conversions

100

How many grams are in 1 kg?

1000g

200

What is unit for measuring volume?

Liters

300

How many cm are in 50 in?

20 cm

400

What is 4.5 m to ft?

15 ft

500

How many miles are in a 10 Gigameters?

6.2 x 10⁶ miles

Density

100

What is the formula for density?

D=m/V

200

What is the density of a block that has a mass of 10 g and a volume of 10 mL?

1g/mL

300

What is the density of water?

1g/mL

400

A student measures the mass of an 8cm³ block of brown sugar to be 12.9g. What is the density of the brown sugar?

2 g/cm³

500

A pure silver coin weighs 8.062 grams. Determine the volume (in L) if the density of silver is 

1.049x10⁴kg/m³. 

(1L = 1.0x10^-3m³)

7.685 x 10^-4 L

Biology

100

What is the powerhouse of the cell

Mitrochondria

200

What are the four nucleotide bases

ATGC

300

What are the three domains of life?

Eukarya, Bacteria, Archaea

400

What are the five physical properties of water  

Cohesion, adhesion, high surface tension, high specific heat, lower density as a solid than liquid

500

What are the steps of the central dogma

DNA replication, translation, transcription