11. What is the mass of 30,000 molecules? Express your answer in scientific notation. Mass of one molecule of oxygen = 5.3 x 10-
2 answers:
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20
Step-by-step explanation:
Step 1:
Let the number be 50 and to find 40% of 50 is given interms of expression as follows
To express the percentage the following strategy is used
Eg: 40% =
∴ To express 40% of 50 is
Step 2:
On simplification the above expression we could get
= 20
- 2.8 ÷ 6 = 0.4666666.... it will continue
- The estimate would be the round off of the Actual answer which would be 0.5 since 0.46666.. is closer to 5