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reneebrown017
14.02.2021 •
Chemistry
Round off the following measurements to two significant figures. Write the answers in scientific notation. a. 6310 m b. 125.00 Kg c. 6906 km d. 0.0828 m need steps and formela
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Ответ:
Explanation:
a. 6310 m
Two significant numbers means it must have only 2 digits. The first two digits are 6 and 3. The next number 1 is not up to 5 hence it would be round off to zero.
Two s.f = 6300
Converting it to scientific notation means it must be expressed by a number between 1 and 10, multiplied by a power of 10.
6.3 x 10^3
b. 125.00 Kg
Two significant numbers means it must have only 2 digits. The first two digits are 1 and 2. The next number 5 is up to 5 hence it would be round up to one.
Two s.f = 130.00
Converting it to scientific notation means it must be expressed by a number between 1 and 10, multiplied by a power of 10.
Scientific notation = 1.3 x 10^2
c. 6906 km
Two significant numbers means it must have only 2 digits. The first two digits are 6 and 9. The next number 0 is not up to 5 hence it would be round up to zero.
Two s.f = 6900
Converting it to scientific notation means it must be expressed by a number between 1 and 10, multiplied by a power of 10.
Scientific notation = 6.9 x 10^3
d. 0.0828 m
Two significant numbers means it must have only 2 digits. The first two digits(excluding zero) are 8 and 2 . The next number 8 is up to 5 hence it would be round up to one.
Two s.f = 0.083
Converting it to scientific notation means it must be expressed by a number between 1 and 10, multiplied by a power of 10.
Scientific notation = 8.3 x 10^-2
Ответ: