Explanation:
- The rule apply for the multiplication and division is :
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
- The rule apply for the addition and subtraction is :
The least precise number present after the decimal point determines the number of significant figures in the answer.
a) 12.3 mm × 15.853 mm :
![12.3 mm\times 15.853 mm :194.9919 mm^2\approx 195 mm^2](https://tex.z-dn.net/?f=%2012.3%20mm%5Ctimes%2015.853%20mm%20%3A194.9919%20mm%5E2%5Capprox%20195%20mm%5E2)
Three significant figures.
b) 72.98 · 15.830 ml
![72.98\times 15.830 ml=1,155.2734 ml\approx 1,155 mL](https://tex.z-dn.net/?f=72.98%5Ctimes%2015.830%20ml%3D1%2C155.2734%20ml%5Capprox%201%2C155%20mL)
Three significant figures.
c) 12.3 mm + 15.853 mm
![12.3 mm + 15.853 mm = 28.153 mm\approx 28.1 mm](https://tex.z-dn.net/?f=12.3%20mm%20%2B%2015.853%20mm%20%3D%2028.153%20mm%5Capprox%2028.1%20mm)
Three significant figures.
d) 172.3 cm - 15.853 cm
![172.3 cm - 15.853 cm= 156.447 cm\approx 156.4 cm](https://tex.z-dn.net/?f=%20172.3%20cm%20-%2015.853%20cm%3D%20156.447%20cm%5Capprox%20156.4%20cm)
Four significant figures.
Sucrose is an example of a non- reducing sugar.
Your welcome :)
The answer to this question is is d
<span> The </span>analytical chemistry<span> of natural and waste waters requires subtle correlation</span>