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annabel

Questions and answers by visitors named annabel

Questions (8)

How many atoms are there in a 15.0-g sample of KBr?
1. 1 answer
2. 377 views
How many atoms are there in a 15.0-g sample of KBr?
1. 2 answers
2. 582 views
How many moles of O2 are needed for the complete combustion of 3 moles of CH4?
1. 3 answers
2. 1,835 views
A sample of iron ore contains 1.02 x 10^24Fe atoms and is found to be 69.94% Fe by mass. What is the mass of the sample?
1. 2 answers
2. 637 views
A 1.8 mole sample of a compound weighs 195 g and is found to be 11.18% H and 88.82% C. What isthe molecular formula for the
1. 2 answers
2. 1,082 views
A solution contains 1.50 g of dissolved Pb2+ ions. How many grams of NaI must be added to the solution to completely precipitate
1. 2 answers
2. 975 views
a mixture of 4.00 moles of hydrogen and3.00 moles of oxygen is ignited, forming water. what is the maximum amount of water in
1. 2 answers
2. 833 views
if the yieeld for the following reaction is 85% how many grams of Al2S3 should be used to produce 165 g of Al(OH)3?Al2S3+6H2O-->
1. 2 answers
2. 537 views