Select all of the following that have a standard enthalpy of formation equal to zero at 25°C and 1.0 atm?
Si (s)
H20 (1)
N2 (g)
Al (s)
CH4 (g)
H2O(g) Br2 (l)

Which sentence best describes the formation of igneous rock? a- lava on the surface dries up and makes arock b_melted rocks cools and forms crystals c_rocks under tremendous heat and pressure d_magma is melted rock underground

Margaret wants to make an orange flavored drink by stirring powdered drink mix into a glass of water. she doesn't like drinks that have small clumps of powdered solid in them, so she wants the drink to be a perfect solution. what factors should margaret not consider when deciding how much powder to add to her glass of water?

Adepositional also feature that forms where a stream enters a lake or an ocean is a