Carbon-14 has a half-life of 5720 years and this is a first order reaction. If a piece of wood has converted 25% of the carbon-14, then how old is it?

In the energy diagram, which number represents the potential energy of the products? (1) (2) (3) (4)

Acids: are generally proton donors produce H + ions in solution are electron pair acceptors may include all of these characteristics

The probability that a continuous random variable takes any specific value a. is equal to zero b. is at least 0.5 c. depends on the probability density function d. is very close to 1.0

How would you justify that ice, water and water vapour are three stages of matters of a substance and not different substances?

The steps of the Scientific Method include question, hypothesis, experiment, analysis, and summary. True or False

If a sealed syringe that contains some gas in heated in which direction will the syringe plunger move

Use the drop‑down menus to label the statements as either true of false. Dichloromethane is flammable. true false Methanol is flammable. Concentrated sulfuric acid is corrosive. 10% sodium carbonate solution must be used in the fume hood.

What is the process all rocks are continuously in during which that can change into other types of rocks

Collagen is made of fibers and is found in tendons and cartilage. Collagen contributes to meat toughness and is, therefore, an example of which type of protein?

1. Why does CH30 evaporate faster than water?