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

When a substance experiences a phase change it is still the same substance, just in a different form. True of or false

To which class of elements does copper (cu) belong: metal, metalloid, or nonmetal? identify three other elements in this class.

Use the balanced chemical equation to work the following problem. 2C4H10 + 13O2 → 8CO2 + 10H2O How many grams of CO2 (molar mass = 44.01 g/mol) would be formed from the total reaction of 5.00 g of C4H10 (molar mass = 58.1 g/mol) ? 15.1 g 0.947 g 0.

A compound contains 3 nitrate ions for every 1 aluminum ion. what is the chemical formula?

Although many students enroll in psychology courses at the college level, few students choose psychology as a major.

Which of the following could be used to describe the rate of a reaction? change in time/change in concentration change in mass/change in concentration change in concentration/change in time change in concentration/change in mass

Planet X is a planet in our solar system. Planet Y is a dwarf planet. Identify their characteristics.

3/4 / 100 as a decimal and a percentage?

What is the net ionic equation for AgNO3 (aq) + Na2SO4 (aq)

What does it take to prove a hypothesis false? O A. It is impossible to prove a hypothesis false O B. At least ten examples O C. One counterexample O D. A poorly stated question