Which material does not melt at any temperature?

A. Ethanol, a molecular compound

B. Iron, a metallic element

C. sodium chloride, an ionic compound

D. Wood, a mixture of different substance

Which of the following is a nonrenewable resource? A. Water power B. Wind C. Sunlight D. Coal

Which of these is an example of plants depending on animals? A. Flowering plants are pollinated when bees and other insects move around in the flowers. B. Burrs are seeds from a plant that are dispersed by getting stuck to the fur of animals. C.

Animals eat these plants and pass the phosphorus through the food chain

Which is denser, a solid solution, a gaseous solution, or a liquid solution

In which layer of earth do most earthauakes occur A_ inner core B_outer core C_mantle D_crust

Do pure substances have the same chemical and physical properties

How is matter conserved in a chemical reaction

Define Percent transmittance

Express (3 x 104) (4 x 1023) in scientific notation

The theoretical yield of aspirin in a reaction is 721 g. What is the percent yield if 461 g is produced?