Which of these is an example of a chemical change

f. methane is burned in air.

g. solid gold is melted to make jewelry.

h. a bar of copper is stretched into a long copper wire.

j. iron is coated with bronze to prevent rusting.

Magma is made up of melted or * blank * materials. A. Intrusive B. Molten C. Extrusive D. Cooled

Explain how pressure affects a scuba diver rising to the surface

A cell created by cloning is genetically A identical to its parent. B identical to its stem cell. C unique because it is a mixture of DNA. D half like its father and half like its mother.

If 1.00 mol of argon is placed in a 0.500-L container at 19.0 ∘C, what is the difference between the ideal pressure (as predicted by the ideal gas law) and the real pressure (as predicted by the van der Waals equation) ? For argon, a=1.

A certain liquid has a vapor pressure of 92.0 Torr at 23.0 °C and 351.0 Torr at 45.0 °C. Calculate the value of ΔH°vap for this liquid.

Why did most scientists reject Wegner's theory for nearly a half century?

Define prediction and explain how it is used to formulate a hypothesis.

A group of organisms that breed and produce offspring that can breed. A. Species B. ecosystem C. Biodiversity

What is the molality of a solution containing 100 grams of glucose (C6H12O6, molar mass = 180 g/mol) dissolved in 2.5 kg of water? 0.22 m 72 m 7200 m 40 m

A battery is constructed based on the oxidation of magnesium and the reduction of cu2+. the initial concentrations of mg2 + and cu2 + are 1.2*10-4 m and 1.44 m, respectively, in 1.0-liter half-cells. how long can the battery deliver 5.