Which atom above is very reactive nonmetal

What is the study of how matter and energy interact? a. biology b. physics c. planetary science d. chemistry

What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?

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