One liter of air contains about 0.21 l of oxygen. when filled, the human lungs hold about 6.0 l of air. how much oxygen is in the lungs when they are filled with air? (round off to the nearest hundredths place.)

When 13.3 g koh is dissolved in 102.7 g of water in a coffee-cup calorimeter, the temperature rises from 21.4 °c to 31.53 °c. what is the enthalpy change per gram of koh (j/g) dissolved in the water? * take the density of water as 1.00 g/ml. * assume that the solution has a specific heat capacity of 4.18 j/g*k. enter to 1 decimal place. do not forget the appropriate sign /(+). canvas may auto-delete the (+) sign

Jose and eric were given four samples in lab. the results of their analysis are shown in the table. based on the data they collected, which sample is most likely a metal?

How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy