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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: melRoberts555_Bio on September 11, 2021, 03:02:23 AM

Title: how to solve this WEIGHT/MOLE CALCULATIONS
Post by: melRoberts555_Bio on September 11, 2021, 03:02:23 AM

Hello people! I was wondering if you could help me solve this problem. I know it must be simple  but I am new in this whole analytical chemistry and I feel a bit confused- I would appreciate it

Problem:

1. Calculate the number of millimoles contained in 500 mg of BaCrO₄

2. Calculate the number of grams that would have to be dissolved and diluted to 100 mL to prepare a 0.200 M solution.

Title: Re: how to solve this WEIGHT/MOLE CALCULATIONS
Post by: Borek on September 11, 2021, 03:12:14 AM

Please read the forum rules (https://www.chemicalforums.com/index.php?topic=65859.0). You have to show your attempts at answering the question/solving the problem to receive help, it is a forum policy.

What formulas combining molar mass, mass and number of moles do you know?