Question

chemistry

Answer 1

@vocaloid

Answer 2

ok, this is multiplication and division, so our sig fig rules are different.

now we want our answer to match the lowest number of **significant digits** (if you don't understand this, I'll explain)

First problem: 971.2 / 0.59

971.2 has 4 significant figures, 0.59 has 2 significant figures, so your answer needs 2 sig figs. round 1646 to 1600 as your solution

Answer 3

so 16?

Answer 4

oh nevermind its 1600

Answer 5

what about the other two problems

Answer 6

Problem 2 looks good

Problem 3: since 25. has 2 sig figs, round 1952 to 20. * 10^2 (that period after the 0 is important, it makes the last 0 significant)

Answer 7

I'll just drop this here to explain sig figs in more detail

https://www.nku.edu/~intsci/sci110/worksheets/rules_for_significant_figures.html

Answer 8

20 is the answer?

Answer 9

In order to write 1952 as 2 sig figs, we have to use scientific notation

we can't round to 2000 because that's only 1 sig fig. putting a decimal at the end makes 4 sig figs.

so we have to use 20. * 10^4

make **sure** to put that decimal after 20 otherwise it's only 1 sig fig

Answer 10

actually hold on sorry

Answer 11

if we re-write 2000 as 2.0 * 10^3 instead, it'll have 2 sig figs

Answer 12

yeah

Answer 13

1600 = 1.6 * 10^3 if they insist on scientific notation