All of the following are indicators of chemical change except ...

a. Change in color

b. Production of a gas

c. Formation of a precipitate

d. All of the above are indicators of chemical change

Which of the following compounds is primarily covalent? Potassium chloride KCL, Methane CH4, Sodium bromide NaBr, or lithium oxide Li20?

A substance that will burn is called a (n)

Be sure to answer all parts. Write a balanced equation (including physical states) for the following reaction: Sodium carbonate, upon heating, produces sodium oxide and carbon dioxide.

It is desired to produce 3.66 grams of phosphorus trichloride by the following reaction. If the percent yield of phosphorus trichloride is 83.

What are geometric isomers? compounds that have the same types of atoms arranged in different orders compounds that have the same number of carbon atoms arranged in different orders compounds that have the same atoms arranged in the same order, but

The molecular weight of vitamin C, CH06, is 176.12 8 mol What is the mass, in grams, of 0.000142 mol of vitamin C? Express the answer using 3 significant figures. 09

When The reaction below demonstrates which characteristic of a base? Upper C U upper S upper O subscript 4 (a q) plus 2 upper N a upper O upper H (a q) right arrow upper C u (upper O upper H) subscript 2 (s) plus upper N a subscript 2 upper S upper

With the exception of a species that lives near the Florida coast, sea urchins are basically harmless to people. Which word is an adjective?

Will some one add me as a friend

1 mol of an Ideal Gas expands through a turbine adiabatically to produce work. Assuming steady flow conditions, how much work is lost due to the entropy generated, if the surroundings are at 300 K? Give the value of lost work to the nearest J.