Question

Question 1
How many significant figures in the following measurement?
0.0021

Question 2
How many significant figures in the following measurement?
3.505

Question 3
How many significant figures in the following measurement?
0.0320

Question 4
Add the two masses together and report the answer to correct significant figures. (Do not use scientific notation.)
12.011 + 1.01 =

Question 5
Use the molar mass of carbon (12.011 g/mol) to calculate the moles in 5.0 g of carbon to correct significant figures. (Do not use scientific notation.)

Answer 1

Answer: According to the given question ;

1] Here only 2 significant figures .

2] here 4 significant figures .

3] here 3 significant figures are present.

4 ]12.011 + 1.01 =13.021 [ here the minimus significant is 3 so we have to report it in 3 significant figures ]

= 13.0 here it is 3 significant digits .

5 ] number of moles = mass / molar mass

= 5.0 / 12.011 = 0.41628 moles

= 0.42 mol [ 2 significant digits]

Hence it is all about the given question . Thank you :)