CALCULATIONS AND SIGNIFICANT FIGURES 8. Assuming that every number given in the following problems is a measured quantity, perform each of the following computations, writing your final answer in scientific notation and to the correct number of significant figures 83.104 +6.800 + 0.100 + 0.0015 75.918-72.624 (618 × 102)(000400) 1.03 85.10 * (2.6 × 10-5) * (4.7 × 10-3) 6.443 × 10-25 * 2.05 × 1023 Chem 200L Laboratory Manual- Proposed Fall 20127 San Diego City College Solution 1. 83.104 + 6.800 + 0.100 + 0.0015 = 90.006 = 9.0006 * 10 1 2. 75.918 - 72.624 = 3.294 3. ( 6.18 * 10 2 ) * ( 0.00400 ) / 1.03 = 2.40 4. 85.10 * ( 2.6 * 10 -5 ) * ( 4.7 * 10 -3 ) / ( 6.443 * 10 -25 * 2.5 * 10 23 ) = 0.000064 = 6.4 * 10 -5 .

1. CALCULATIONS AND SIGNIFICANT FIGURES 8. Assuming that every number given in the
following problems is a measured quantity, perform each of the following computations, writing
your final answer in scientific notation and to the correct number of significant figures 83.104
+6.800 + 0.100 + 0.0015 75.918-72.624 (618 × 102)(000400) 1.03 85.10 * (2.6 × 10-5) *
(4.7 × 10-3) 6.443 × 10-25 * 2.05 × 1023 Chem 200L Laboratory Manual- Proposed
Fall 20127 San Diego City College
Solution
1.
83.104 + 6.800 + 0.100 + 0.0015 = 90.006 = 9.0006 * 10 1
2.
75.918 - 72.624 = 3.294
3.
( 6.18 * 10 2
) * ( 0.00400 ) / 1.03 = 2.40
4.
85.10 * ( 2.6 * 10 -5
) * ( 4.7 * 10 -3
) / ( 6.443 * 10 -25
* 2.5 * 10 23
) = 0.000064 = 6.4 * 10 -5