A40.2 g sample of a metal heated to 99.3â°c is placed into a calorimeter containing 120 g of water at 21.8â°c. the final temperature of the water is 24.5â°c. which of the following might be the metal that was used?
a) aluminum (c=0.89j/gâ°c)
b) iron (c=0.45j/gâ°c)
c) copper (0.20j/gâ°c)
d) lead (c=0.14j/gâ°c)

Which of the following signs of a chemical reaction are observed in the reaction of potassium with water? precipitate formed temperature change smell produced gas produced color change

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons

Rocks, as they are compressed, begin forming mountains above the earth's surface when two continental plates converge. the continental crust increases in depth as the mountains grow above. the himalayan mountains formed at a convergent plate boundary in this manner. the rocks are smashed together causing them to due to the intense heat and pressure from the colliding plates and eventually forming rock. a) melt; igneous b) layer; sedimentary c) recrystallize; metamorphic d) melt into the earth's interior; metamorphic