At a phase change, what happens to temperature on a cooling graph?
A) It decreases as the molecules lose/release
energy.
B) It remains constant

Find the number of moles of argon in 364g of argon.

Oil rich countries in the middle east cover about 4% of earths total land area but prossess about 48% of the worlds known oil reserves what is the main reason for high concentration of reserves in this part of the world

Pl what kind of reaction is this? nahco3 + h2o → co2 + naoh + h2o -composition -decomposition -single replacement -double replacement im leaning more toward single replacement. if im wrong can you explain whyy?