How many electrons can be contained in the second energy level?

A. 2

B. 18

C. 10

D. 8

You breathe in 3.0 L of pure oxygen at 298 K and 1,000 kPa to fill your lungs. How many moles of oxygen did you take in? Use the ideal gas law: PV = nRT where R=8.31 L-kPa/mol-K A. 0.05 MOLE B. 1.21 MOLES C. 2.42 MOLES D. 20.0 MOLES

Describe how you would prepare 2.44 kg of an aqueous solution that is 16.3% KOH by mass. Describe how you would prepare 2.44 of an aqueous solution that is 16.3% by mass. 0.163 kg KOH. Add 0.163 kg KOH to 2.277 kg water. 2.44 kg solution x 0.163 = 0.

A gas occupies 1.56L at 1.00 atm. What will be the volume of this gas if the pressure becomes 3.00 atm

A 10.0ml sample of calcium hydroxide solution requirewd 26.85ml of 0.225 m hydrochoric acid for neutralization. calculate the nolar concentration of the bsae

A 10 g sample of a compound contain only carbon, hydrogen, and oxygen forms 23.98 g CO2 and 4.91 g H2O upon complete combustion. What is the empirical formula of the compound?

Molarity of 11.0 L of a 2.8 M Ca (OH) 2 solution?

Identify the independent and dependent variables. Peter is conducting an experiment to see how much salt will dissolve in water as the temperature of the water is increased.

A block of wood has a mass of 6.0g and a volume of 12.0 cm3. what is the density of the block of wood

A mercury thermometer is used to take four temperatures of a solution

Which of the following systems (i. e., pair of metals) would you expect to exhibit complete solid solubility? Cr-V Mg-Zn Al-Zr