Describe an experiment you could perform to determine whether Pb2 + had leached into water drawn from plumbing in which lead was used to solder to join copper pipes.

Which of the following subatomic particles has no charge? A. Neutrons B. Electrons C. Protons D. Nucleus

What is the volume of 7.25 g of oxygen gas at STP?

The average cup of coffee contains about 125 mg of caffeine, C8H10N4O2. Caffeine is also found in tea, colas, and headache remedies. What is the mass (in grams) of one molecule of caffeine?

Why has the canals in Venice Italy cleared up during this time?

What is the coefficient for the formula 6C6H12O6?

How do you make a guy who is extremely into you, even though he knows you aren't single, to bug off?

A chemist has dissolved a certain substance in water. The chemist knows that more of the substance could be dissolved into the water before it stops dissolving. Therefore, the current solution is

Which of these particles is the smallest? A. an atom B. a nucleus C. a proton D. an electron

In a five-fold serial dilution of a 20 pg/ml solution, all tube dilutions are 1/5. What is the substance concentration in the third tube of this series?

Which of the following substances is never a Brønsted-Lowry base in an aqueous solution? Group of answer choicespotassium hydroxide, KOHsodium hydrogen phosphate, Na2HPO4sodium phosphate, Na3PO4ammonium chloride, NH4Clsodium bicarbonate, NaHCO3