There is a concentrated (12.0 M) solution of HCl in the lab storage area. You need to prepare 1600. mL of HCl solution that has a pH equal to 1.50. a) What volume of the 12.0 M HCl solution do you need?

b) What volume of water do you need?

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils

1. list three scientific reasons cockroaches may fly.

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?