A newspaper headline says that the average home uses about 30 kilowatt-hours per day. What is a kilowatt?

100 watts

1,000 watts

1/100 of a watt

30 watts

Which equation shows a physical change? Pb (NO3) 2 (aq) + 2KI (aq) _ 2KNO3 (aq) + PbI2 (s) HCl (aq) + NaOH (aq) _ NaCl (aq) + H2O (l) 2H2O (l) _ 2H2 (g) + O2 (g) H2O (g) _ H2O (s)

A compound that produces hydrogen ions in solution, is a hydrogen-ion donor, or an electron-pair acceptor.

How can you tell when the magnesium metal has reacted completely?

Which statement is true? Rocks do not contain any mineral matter. Most rocks are composed of a single mineral. Most rocks are made up of a mixture of minerals.

Application of boyle's law a 12-liter tank contains helium gas pressurized to 160 atm. part b what size tank would be needed to contain this same amount of helium at atmospheric pressure (1 atm) ?

How are revolution and year related

Read the scientific question below. "Does sunlight make plants live?" What is a likely hypothesis for the question?

A chemist is using a solution of HNO3 that has a pH of 3.75. What is [H+] for the solution?

What is the oxidation number for CO2

Which is a property of acids in aqueous solutions?