Ap Chemistry
An ore contains Fe3O4 and no other iron. The iron in a 60.67 gram sample of the ore is all converted by a series of chemical reactions to Fe2O3. The mass of Fe2O3 is measured to be 36.1 grams. What was the percent Fe3O4 in the sample of ore? Answer in units of %
lang arts
I got 1. D 2. A 3. c 4. B 5. A please help me do I have them right?
geometric sequences
I can not find the missing term 81 54 _ _ _ not seeing the missing terms.
pharmacy tech.
a pharmacist has a 40% acid solution and has a 25% acid solution. How many liters must be mixed to form 54 liters of a 27 % acid solution?
Math
a pharmacist has a 40% acid solution and has a 25% acid solution. How many liters must be mixed to form 54 liters of a 27 % acid solution?
Chemistry
How many grams of SO3 are needed to make 250 ml of 0.750 molar solution?
chem
How many grams of SO2 are needed to make 250 ml of 0.750 molar solution?
Physics
A car traveling 80km/h is 120m behind a truck traveling 66km/h. How long will it take the car to reach the truck?
Physics
A car traveling 80 is 120 behind a truck traveling 66 . How long will it take the car to reach the truck?
English
What is the plural of scientist?
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