## Search found 106 matches

Wed Oct 10, 2018 8:03 pm
Forum: Limiting Reactant Calculations
Topic: Module Question #18 Help
Replies: 1
Views: 116

### Re: Module Question #18 Help

I have the exact same calculations you have... From the 4:5 ratio based on the balanced equation, for the calculated 1.26 mol NH3, 1.58 mol O2 are required. However, from the calculation it is only 1.33 mol of O2, so yes the product produced will depend on the limiting reactant which in this case is...
Wed Oct 10, 2018 12:51 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: E15 homework problem
Replies: 2
Views: 186

### Re: E15 homework problem

Thanks, this helped!
Tue Oct 09, 2018 11:47 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: E15 homework problem
Replies: 2
Views: 186

### E15 homework problem

On question E15, the question says: "The molar mass of the metal hydroxide M(OH)2 is 74.10 gmol1. What is the molar mass of the sulfide of this metal?" I got confused that it said "sulfide" does anyone know what that refers to in the formula?
Thu Oct 04, 2018 4:08 pm
Forum: Molarity, Solutions, Dilutions
Topic: Molarity and Dilution of a Solution Post Module Assessment Question 25
Replies: 5
Views: 141

### Re: Molarity and Dilution of a Solution Post Module Assessment Question 25

Can someone please explain why the initial volume is 0.02 L? I thought it was 0.15 L? Thank you!
Tue Oct 02, 2018 5:45 pm
Forum: Significant Figures
Topic: Significant figures for molar mass
Replies: 7
Views: 621

### Significant figures for molar mass

When doing the process of finding the moles of each element (having to divide the mass of the element by the atomic mass/mole of an element), how do we determine how many significant figures to use? For example, molar mass of Carbon, do I use 12.01 g/mol or 12.011 g/mol? How do you differentiate whe...
Tue Oct 02, 2018 5:28 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Mass calculation
Replies: 2
Views: 93

### Mass calculation

On the video module under Empirical and Molecular formulas, the example of finding the molecular formula for vitamin C, the molar mass given for the compound is 176.14gmol^-1. Then I take the empirical formula C3H4O3 and multiply it by 2.000 to get the molecular formula C6H8O6. What I am confused on...