## Search found 5 matches

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...
Sun Oct 11, 2020 8:57 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Replies: 31
Views: 363

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.
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!
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.
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.