Question

Please help me, I will give medal in return.
Ok so i need a little help with understanding The Atom: From Philosophical Idea to Scientific Theory Apply. It is a little confusing, I just wanna try to solve this first problem so i can see if it will help me with the rest.

Which of the following has four significant figures?
a. 1.003
b. 4.1
c. 12.567
d. 1.2 x 10^4

Answer 1

) ALL non-zero numbers (1,2,3,4,5,6,7,8,9) are ALWAYS significant.
2) ALL zeroes between non-zero numbers are ALWAYS significant.
3) ALL zeroes which are SIMULTANEOUSLY to the right of the decimal point AND at the end of the number are ALWAYS significant.
4) ALL zeroes which are to the left of a written decimal point and are in a number >= 10 are ALWAYS significant.

Rules for sig figs.

Answer 2

I really am lost

Answer 3

OHHHHHHHHH!!!! I THINK I MIGHT HAVE IT!!!!

Answer 4

Which one?

Answer 5

um hold on im checking to see if im right real quick

Answer 6

Ok so i culd be worng but i think it is "D"

Answer 7

wrong*

Answer 8

1.2 x 10^4=12,000

Because there is no longer an decimals, that is only 2 sig figs, do it's not D

Answer 9

ok i guess that make sense \, so then that means the answer would be "A" It has two 0's and two no zero numbers plus the decimal point.

Answer 10

yes

Answer 11

that is correct

Answer 12

Perfect!!! Thank you so much!!! You are a total lifesaver bro!!!

Answer 13

I would have gave you a bunch of medals but someone already beat me to it lol!

Answer 14

Lol np, feel free to tag me onto more questions. I am taking chemistry too, so this is good review for me.