Friday

November 21, 2014

November 21, 2014

Posted by **anonymous** on Tuesday, July 31, 2007 at 9:28am.

1) when a measurement that has six significant digits is divided by a measurement that has three significant digits, how many significant digits should the answer have?

ANSWER: 2

2) How many hydrogen atoms are in 5 molecules of isopropyl alcohol, C3H7O?

ANSWER: 35

3) How many moles of SO3 are in 2.4 x 10^24 molecules of SO3

ANSWER: 4.0

Number one is incorrect. Three is the answer: in muliplication and division, the answer is limited to the number of significant digits of the least number. In this case, three is the limit in the denominator.

The chemical formula for aspirin is C9H8O4 What is the mass of 0.40 mol of aspirin?

45g

10.8g

160g

72g

**Answer this Question**

**Related Questions**

Algebra 8th - Find the greatest possible error for each measurement. 953 mi 0.5 ...

Math - More Precision and Significant Digits - Please help me with the following...

Physics - Talking about significant figures, my Physics textbook lists 5 rules ...

Physics - Calculate the answer for the following question and state the answer ...

Chemistry help - Hey...I just want to make sure my answers to these questions ...

chemistry - this is over significant digits. -Indicate how many significant ...

Chemistry - Thank you! I redid my questions and I got the following answers. ...

Math - Precision and Significant Digits - Please help me with the following: ...

Chemistry - How many number of significant figures are there in measurement 6.80...

Physics - bobpursely - State the number of significant figures. 1) 809 Answer : ...