A gas is collected at 150oC and 650 kPa. When the temperature is changed to 20oC, what is the resulting pressure?

219 grams of iron (iii) oxide reacts with excess carbon according to the reaction equation shown below. fe2o3 + c → fe + co2 after a scientist performs the chemical reaction they find the actual yield of iron to be 57.4 grams. calculate the percent yield of this chemical reaction.

Use the drop-down menus to answer each question. which runner finished the 100 m race in the least amount of time? which runner stopped running for a few seconds during the race? at what distance did anastasia overtake chloe in the race?

George is a dalmatian puppy. describe what happens to light that allows you to see george’s black and white coat.