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

If there are only a few remaining members of an insect species living in one area, which would most likely cause this species to become extinct? the introduction of new predators to the insects' environment

How do you expect the water level to change when the apparatus is placed in warm water? In cool water?

Which describes what happens when two minerals have different arrangements of their atoms? A. They have different hardnesses. B. They have different colors. C. They have different streaks. D. They have different cleavages.

Zinc metal reacts with hydrochloric acid according to the following balanced equation. Zn (s) + 2HCl (aq) →ZnCl2 (aq) + H2 (g) When 0.121 g of Zn (s) is combined with enough HCl to make 52.

Identify a good buffer. small amounts of both a strong acid and a strong base significant amounts of both a weak acid and a strong acid significant amounts of both a weak acid and its conjugate base small amounts of both a weak acid and its

How many grams of sulfur (S8S8) must be dissolved in 100.0 g naphthalene (C10H8C10H8) to make a 0.11 mm solution

Mason compare the properties of two compounds magnesium oxide is an ionic compound and hydrogen peroxide is not an ionic compound there for both compounds most likely

Cisplatin is synthesized as follows: K2PtCl4 (aq) + 2NH3 (aq)  Pt (NH3) 2Cl2 (s) + 2KCl (aq) What mass of cisplatin can be made from 100. g of K2PtCl4 and sufficient NH3? What mass of KCl is also produced?

What is the total number of protons in the nucleus of an atom of potassium-42? (1) 15 (3) 39 (2) 19 (4) 42

What happens to the equilibrium when the pressure is increased? It favors formation of products. It does not change. It favors formation of reactants. It is conserved.