Xác định xem các chất sau có phải là nguyên tố nguyên chất, hợp chất nguyên chất, đồng đẳng không hỗn hợp, hoặc hỗn hợp không đồng nhất. một. Hỗn hợp các loại hạt
hai. Khí hydro

Diamond, graphite, and fullerenes share what property? a. they are all made of carbon (c) bonded to a metal. b. their shape. c. they are all made of carbon (c). d. they are all good conductors.

Which statement about the stamps is correct?

What can be added to the examples section of each circle? endothermic: ice melting into water, and a heat pack becoming warm exothermic: a glow stick glowing, and fireworks exploding endothermic: ice melting into water, and an instant ice pack turning cold exothermic: fireworks exploding, and gasoline burning endothermic: a glow stick glowing, and a heat pack becoming warm exothermic: an instant ice pack turning cold, and ice melting into water endothermic: gasoline burning, and an instant ice pack turning cold exothermic: ice melting into water, and an instant ice pack turning cold