Mustang PreAP Chemistry - Sig Figs & Math Computations

How many sig figs are in the number 4.120?

• 1
• 3
• 4
• 2

How many sig figs are in 1.1500 x 10²?

• 3
• 4
• 5
• 1

What is the answer to the question:
1.5280 + 1.00

• 2.5280
• 2.53
• 2.538
• 3.

What is the answer to the following question:
49.85 - 2.3

• 47.6
• 47.55
• 48
• 48.0

What is the answer to the following question:
4.5380 x 1.12

• 5.08256
• 5.08
• 5.083
• 5.09

What is the answer to the following question:
.00250 x 1.

• .0025
• 0.0025
• .003
• .03

• Accurate only
• Precise only
• Not accurate and not precise
• Both accurate and precise

Silver has two isotopes.  Ag-107 (mass 106.905 amu) occurs with a percent abundance of 52%.  Ag-109 (mass 108.905 amu) occurs with a percent abundance of 48%.  What is the atomic mass of silver?  

• 55.59
• 52.27
• 107.86
• 107.905

Calculate the density if the mass of the sample is 5.32 g and the volume is 4.20 ml.

• 1.27 g/ml
• .789 g/ml
• 1.12 g/ml
• 22.3 g/ml

Convert 25.0 kg to g.

• .025 g
• 2500 g
• 25000 g
• .25g