Search found 106 matches

by Diana A 2L
Fri Oct 04, 2019 7:45 pm
Forum: SI Units, Unit Conversions
Topic: Rounding
Replies: 6
Views: 114

Rounding

When we are showing work for a problem, how do we indicate that the values in our work aren't rounded yet, but its just shorthand b/c its crazy to write out the actual value?
by Diana A 2L
Fri Oct 04, 2019 7:34 pm
Forum: Molarity, Solutions, Dilutions
Topic: Homework M11
Replies: 1
Views: 66

Homework M11

This question asks to find the limiting reaction for the formation of Phosphorus(V) oxide, and gives you a series of two reactions that lead to the formation of this substance. How would I find the limiting reactant working with two different reactions? I need a hint to start the problem please!
by Diana A 2L
Fri Oct 04, 2019 7:26 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Homework Grading
Replies: 7
Views: 144

Re: Homework Grading

And also, when we are showing our work, will we be penalized if we don't write the units for every single calculation, but only indicate units in the significant portions of the problem and in the final answer?
by Diana A 2L
Fri Oct 04, 2019 7:22 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Homework Grading
Replies: 7
Views: 144

Homework Grading

For the grading of the homework, if our answer is slightly off due to rounding differences, will we still receive credit for the problem? And how much leeway approximately do we have in terms of rounding differences for homework answers?
by Diana A 2L
Fri Oct 04, 2019 7:17 pm
Forum: Balancing Chemical Reactions
Topic: Diatomic elements?
Replies: 8
Views: 128

Re: Diatomic elements?

I would note that for diatomic elements it is important to remember to use molar mass of 32.0g/mol when doing stoichiometry calculations that ask questions like, "how many moles of oxygen does THIS reaction produce". Since oxygen naturally occurs in pairs:)
by Diana A 2L
Fri Oct 04, 2019 7:13 pm
Forum: SI Units, Unit Conversions
Topic: Series of Reactions Question
Replies: 2
Views: 69

Series of Reactions Question

Whenever given a series of reactions in a stoichiomtery mass-to-mass conversion problem, can you combine the series of reactions into an overall equation to find the molar ratios instead of individually balancing each equation and using the molar ratios of the separate reactions in the series?

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