It says to perform the following calculations and express your answers in the correct units and number of significant figures.
2.8g/6.86 times 10^-3 l
45.68g
+3.8 g
1423 mL
- 40mL
The first one is to two sig digits.
The second one is sig to the tenths place
the third one is sig to the tens place
1380ml
To perform the calculations and express the answers in the correct units and significant figures, follow these steps:
1. Calculate the division: 2.8g divided by 6.86 times 10^-3 l.
First, convert the volume from liters to grams by using the density. If you have the density information, multiply the given volume (6.86 times 10^-3 l) by the density to get the volume in grams. For example, if the density is 1 g/ml, then the volume in grams would be (6.86 times 10^-3 l) * (1 g/ml).
Once you have the volume in grams, divide the mass (2.8g) by the volume in grams to get the result.
2. Perform addition: 45.68g + 3.8g.
Add the two values together to get the result.
3. Perform subtraction: 1423 mL - 40 mL.
Subtract the second value (40 mL) from the first value (1423 mL) to get the result.
Remember to express the answers in the correct units and with the appropriate number of significant figures.