Which pair includes two types of pure substances? a. elements and homogeneous mixtures b. heterogeneous mixtures and compounds c. homogeneous mixtures and heterogeneous mixtures d. elements and compounds

Joe shines white light into a bowl half full of water at an angle of incident of 27.5°. calculate the angle of refraction in the water given the indices of refraction for air and water are 1.00 and 1.36, respectively.

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.

Organisms that live in the alpine and taiga biomes have developed unique adaptations that aid in their survival. moss campion is one of the plants found in the alpine biome. it has small leaves and a cushion shape that protect it from the wind and freezing temperatures in the alpine. how has the moss campion adapted to enable its survival in the alpine biome? a. waxy needles b. cone-shaped c. thin trunks d. low-growing