chemists have determined that 18.0 g of water consists of 6.02x10^23 molecules assuming that a teaspoon holds in 3.70 ml of water, determine the number of molecules in 1.00 teaspoon of water

Which statement describes the appearance of a temperature-vs.-time graph? a horizontal line shows that the temperature increases at a constant rate over time. a vertical line shows that the temperature decreases at a constant rate over time. horizontal lines where the temperature is constant during phase changes connect upward-sloping lines where the temperature increases. horizontal lines where the temperature increases are connected by upward-sloping lines where the temperature is constant for each phase.

Which substances have the lowest melting points: ionic covalent, or metallic

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains