Chemisty (Sig Figs)

posted by .

Each of the following numbers was supposed to be rounded to two significant figures. For each one below, decide whether it was correctly rounded or not, and for those that were incorrectly rounded, correct them.

(a) 3.149 e3 to 3.2 e3
Its incorrect but I don't know the correct answer

(b) 7.999 102 to 80
same with this one

50.31 to 50.3
same with this one and I put 50.0 and it said check the number of sig figs

(d) 0.009914 to 0.010
this is incorrect but i don't know the correct one.

thanks:)
im not that good at sig figs:(

• Chemisty (Sig Figs) -

The issue you seem to have is not significant figures, but rounding rules.

You can fine rounding rules and examples on a Google search.

a) 3.149e9 rounds (to two sig figures) to 3.1e9

b) 7.999 102 to 80 rounds to 8.0e2
c) 50.31 to 50 or better 5.0e1. When one writes 50, it is difficult to know if the zero is significant, in general it is not. But with 5.0e1, the zero is certain.
d) 0.009914 to 0.0099 is two significant figures.

Similar Questions

1. Physics Sig Figs

When you are multiplying two numbers, how do you determine the number of significant figures?
2. Science (Chemistry!)

I just do not understand ANYTHING about multiplying/dividing/adding/subtracting significant figures! For example, the problem is: Solve the following to the correct number of significant figures: (5.039)(0.0074) What am I supposed …
3. Science help

A drop of oil volume 0.05cm^3 is released from a medicine dropper on to a calm surface of a pond where it spreads out to cover an area of 40cm^2. Assume that the oil film has a uniform thickness equal to the diameter of an oil molecule. …
4. Chemistry-sig figs

Each of the following numbers was supposed to be rounded to two significant figures. For each one below, decide whether it was correctly rounded or not, and for those that were incorrectly rounded, correct them (a) 1.249 X 10 to the …
5. sig figs

each of the following were suppose to be rounded to two sig figs. mark then correct or incorrect. if incorrect state the correct answer 1) 1.249 103 to 1.3 103 i know its wrong but i don't know the correct answer 2)7.999 102 to 80 …
6. algebra

SEE BELOW PLEASE at******** If computing N(t) = Pa^t where P=642.035376 and a = 2.900129566 (both are stored in calculator), to what extent should the values of N(5), N(7) and N(9) be rounded?
7. algebra

SEE BELOW PLEASE at******** If computing N(t) = Pa^t where P=642.035376 and a = 2.900129566 (both are stored in calculator), to what extent should the values of N(5), N(7) and N(9) be rounded?
8. math

See below PLEASE at ******** If computing N(t) = Pa^t where P=642.035376 and a = 2.900129566 (both are stored in calculator), to what extent should the values of N(5), N(7) and N(9) be rounded?
9. Math

174.69 rounded to 2 sig figs
10. SIG FIGS

174.69 rounded to 2 sig figs

More Similar Questions