Search found 5 matches

by ZachMLB963
Sun Oct 11, 2020 9:03 pm
Forum: Significant Figures
Topic: Sapling HW #4
Replies: 31
Views: 314

Re: Sapling HW #4

Hiya! 950000 has four trailing 0s after two significant non-zero numbers; these zeroes aren't significant. If the number was 950000.0 with a decimal point, the trailing zeroes would be significant. 80060 has the same number of significant figures are 8006; there are two zeroes smooshed between two s...
by ZachMLB963
Sun Oct 11, 2020 8:57 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Avogadro's #
Replies: 31
Views: 363

Re: Avogadro's #

Hiya!

Avogadro's Number is used to convert between the count of particles in a substance and moles or grams or liters of said substance.
by ZachMLB963
Sun Oct 11, 2020 8:54 pm
Forum: Molarity, Solutions, Dilutions
Topic: What does mmol stand for?
Replies: 33
Views: 329

Re: What does mmol stand for?

Hiya!

1 mmol = 0.001 mol. A millimole!
by ZachMLB963
Sun Oct 11, 2020 8:51 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Rounding with basic calculator
Replies: 16
Views: 443

Re: Rounding with basic calculator

Hiya!

It's a good rule of thumb to avoid rounding until a final solution has been obtained. Rounding is different for each question, and depends on the number of significant digits found on the numbers in the problem.
by ZachMLB963
Sun Oct 11, 2020 8:48 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Exercise E.9
Replies: 6
Views: 133

Re: Exercise E.9

Hiya!

A "hydrate" has water molecules included in the compound. Because this is a "heptahydrate," there are 7 water molecules added.

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