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anonymous

  • one year ago

PLEASE HELP - MEDAL AND FAN: Hey guys, sorry I know this isn't exactly math, but there was nobody in chemistry. I have a few questions on significant figures and I was wondering if you could check my answers?

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  1. anonymous
    • one year ago
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    @ganeshie8 @Nnesha

  2. anonymous
    • one year ago
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    The first one is 6.07 * 10^-15 How many sig figs? I put 3, is that correct?

  3. Vocaloid
    • one year ago
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    yes

  4. anonymous
    • one year ago
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    ok 0.003840 How man sigfigs? 4?

  5. Vocaloid
    • one year ago
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    yes

  6. anonymous
    • one year ago
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    17.00 4 sig figs?

  7. Vocaloid
    • one year ago
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    yes

  8. anonymous
    • one year ago
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    8 * 10^8 I think this one is 1 sig fig?

  9. Vocaloid
    • one year ago
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    yup

  10. anonymous
    • one year ago
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    lol ok - 463.8052 7 sig figs

  11. Vocaloid
    • one year ago
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    yes

  12. anonymous
    • one year ago
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    300 has 1 301 has 3 and 300. has 3 ?

  13. Vocaloid
    • one year ago
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    yes to all

  14. anonymous
    • one year ago
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    Awesome, so 100 has 1 and 1.0 * 10^2 has 1 as well right?

  15. Vocaloid
    • one year ago
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    almost 1.0 * 10^2 has 2, since we count the 0 after a decimal point

  16. anonymous
    • one year ago
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    oh ok - so would 1.00 * 10^3 be 3?

  17. Vocaloid
    • one year ago
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    yes

  18. anonymous
    • one year ago
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    100. 3 s.f.?

  19. Vocaloid
    • one year ago
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    yup

  20. anonymous
    • one year ago
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    0.0048 has 2? 0.00480 has 3? 4.80 * 10^-3 has 3? 4.800 * 10^-3 has 4?

  21. Vocaloid
    • one year ago
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    yes to all

  22. anonymous
    • one year ago
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    ok what about rounding to sig figs? 0.00034159 to three digits? how do i do that

  23. Vocaloid
    • one year ago
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    well, 0.00034159 has 5 sig figs, so we look at the third digit from the right (1). then we look at 5 (the next digit) to see whether to keep 1 or round to 2. since it's 5 we round 1 to 2 like so: 0.00342

  24. anonymous
    • one year ago
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    ok but what happened to the third zero?

  25. Vocaloid
    • one year ago
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    oh whoops 0.000342

  26. anonymous
    • one year ago
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    haha ok thats what i thought the next one is 103.351 * 10^2 to 4 digits. 103.4?

  27. Vocaloid
    • one year ago
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    yup, but don't forget the 10^2

  28. anonymous
    • one year ago
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    ok so i keep that. Next one is: 17.9915 to 5 digits 17.992

  29. Vocaloid
    • one year ago
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    yup

  30. anonymous
    • one year ago
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    ok and the last one: 3.365 * 10^5 to 3 digits 3.37 * 10^5 ?

  31. Vocaloid
    • one year ago
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    yes

  32. anonymous
    • one year ago
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    btw you are awesome, my teach gave homework without teaching (which is ok except for the fact that I don't have my textbook yet lol)

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