List the following minerals in order of decreasing hardness: apatite, calcite, corundum, feldspar, and talc.

How many moles are in 1.6 x 10^25 atoms of Fe

The air pressure inside a submarine is 0.832atm. What would the pressure be in mnhg

Suppose you were to use a 0.500 M solution of sodium hydroxide instead of the 0.100 M solution of sodium hydroxide. How many mL of 0.500 M NaOH would be needed to titrate 10 mL of the HCl used in this experiment? Choose the closest answer.

If 13.5 L of Nitrogen gas react with 17.8 L of Hydrogen gas at STP, according to the following reaction, what mass of ammonia will be produced?

1 mole ch4 molecules, 1 mole sf2 molecules, 1 mole n2o molecules, or all of the selctions are equal which has more molecules?

What is true of energy as is passes through an ecosystem? a. All of the energy in an organism is used by the animal that eats it. b. Any stored energy in an organism is used by the animal that eats it. c.

Which can associate a suspect and the firing of a gun? (its not b) A) markings on the gun's exterior B) markings on the casing C) markings on the bullet D) powder residues

Which of the following locations would most likely have the most fertile soul?

What is an "alloy" in the chapter of metals in chemistry?

Which one of the atoms shown would be most likely to form a cation with a charge of 1?