1. a mixture of salt and iron filings has a mass of 4.5g. a student determined that the iron
filings had a mass of 3.0g during a separation lab. what is the percent composition of
iron in the mixture?

The clouds are grey and ground is wet. a quantitative b qualitative

Which statement best describes the function of enzymes?

Ammonium perchlorate nh4clo4 is the solid rocket fuel used by the u. s. space shuttle. it reacts with itself to produce nitrogen gas n2 , chlorine gas cl2 , oxygen gas o2 , water h2o , and a great deal of energy. what mass of nitrogen gas is produced by the reaction of 2.1g of ammonium perchlorate?