7. A gas takes up a volume of 15 liters, has a pressure of 3.3 atm, and a temperature of 299 K. If I raise the temperature to 350 K and lower the pressure to 1050 mmHg, what is the new volume of the gas?

8. I have an unknown volume of gas held at a temperature of 115 K in a container with a pressure of 60.0

atm. If by increasing the temperature to 225 K and decreasing the pressure to 30.0 atm causes the volume

of the gas to be 25 liters, how many liters of gas did I start with?

9. A gas has a temperature of 14oC, and a volume of 5.5 liters. If the temperature is raised to 29oC and the

pressure is not changed, what is the new volume of the gas?

10. A gas that has a volume of 28 liters, a temperature of 65oC, and an unknown pressure has its volume

increased to 36 liters and its temperature decreased to 35oC. If I measure the pressure after the change to

be 2.0 atm, what was the original pressure of the gas?

Which is a chemical property of iron? a. it forms iron oxide (rust) when exposed to moisture and air. b. it is a gray–black metal that is hard to the touch. c. it has a melting point of 2795°f (1536°c). d. it is a good conductor of heat

Oxidation-reduction reactions (often called "redox" for short) are reactions that involve the transfer of electrons from one species to another. oxidation states, or oxidation numbers, allow chemists to keep track of these electron transfers. in general, one element will lose electrons (oxidation), with the result that it will increase in oxidation number, and another element will gain electrons (reduction), thereby decreasing in oxidation number. the species that is oxidized is called the reducing agent or reductant. the species that is reduced is called the oxidizing agent or oxidant. to sum up: oxidation = increase in oxidation state = loss of electrons = reducing agent reduction = decrease in oxidation state = gain of electrons = oxidizing agent part a which element is oxidized in this reaction? fe2o3+3co→2fe+3co2 enter the elemental symbol. view available hint(s) is oxidized part b which element is reduced in this reaction? 2hcl+2kmno4+3h2c2o4→6co2+2mno2+2kcl+4h2o enter the elemental symbol. view available hint(s) is reduced

Which characteristics can be used to differentiate star systems? check all that apply.