What hypothesis states that the continents were once joined to form a single supercontinent? A. continental drift B. paleomagnetism C. plate tectonics D. sea-floor spreading

How many molecules are there in 2.50 moles of methane?

A ball is dropped from the top of a building. When does the ball have the least potential energy? 1 half way through the fall 2 after it has hit the ground 3as it is released 4 just before it hits the ground

1 mg is equal to what type of unit

Which of the following elements would be expected to resemble germanium (Ge) most closely in chemical properties? 1. Cu 2. Zn 3. Sn 4. Na 5. Ga

Identify a chemical that is used to counteract the effects of acid precipitation on aquatic ecosystems.

Which states of matter have no definite volume?

Which weighs more 10g of iron or 10g of water

Which pair of elements would combine to form an ionic compound? а b sodium and calcium sodium and chlorine carbon and oxygen carbon and sulfur с d

How many moles are there in 545g of Fe2O3?

How are magic minerals different from Felsic minerals? A. Mafic minerals contains lower levels of iron and magnesium. B. Mafic minerals contain more dark-colored, high-density minerals C.