Raj needs to determine the chemical composition of trace evidence like paint and fiber. Which tool would Raj use to do this? comparison microscope

scanning electron microscope

microspectrophotometer

gas chromatograph

Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy

Gasoline has a density of 0.740 g/ml. if you have 328 grams of gasoline, what is the volume in milliliters?

What is the density, d, of a substance with a volume of v = 12.5 cm3 and a mass of m = 74.4 g ?