What always occurs during a chemical reaction? A. A change in color. B. A change in shape. C. A change in energy. D. A change in state.

A sample of gas has a volume of 0.600 L at a temperature of 303 k. If the volume is increased to 0.900 L, what is the new temperature?

Every organism requires a set of instructions that specifies its traits. Which statement best describes the hereditary information in a cell? A) Each chromosome contains a single gene. B) A gene, but not a chromosome, is made of DNA.

When is using the median more useful

Groundwater in an area flows at a speed of 4km/h. How long would it take the water to flow 10 km t it's springs

Replacing standard incandescent lightbulbs with energy-efficient compact fluorescent lightbulbs can save a lot of energy.

We dissolve 5.00 grams of sugar, C12H22O11, in water to make 1.000 L of solution. What is the concentration of this solution expressed as a molarity?

What mass of carbon monoxide must be burned to produce 175 kj of heat under standard state conditions?

The Wittig reaction involves coupling between a phosphonium ylide and a carbonyl-containing molecule. If a chemist wants to use the Wittig reaction to synthesize 3-methyl-3-hexene, which reactants should be used?

How many grams of zinc are needed to produce 25.0 g ZnCl2

What property do most metals share