A sample of wood that originally contained 100 grams of carbon-14 now contains only 25 grams of carbon-14. approximately how many years ago was this sample part of a living tree?

State the law of conservation of energy. A) The law of conservation of energy states that energy can neither be created nor destroyed. B) Energy can be transferred from one object to another, and it can assume different forms.

Maximum potential energy of electron in an atom?

Which of the following solutions is a buffer? Check all that apply. A. a solution made by mixing 100 mL of 0.100 M CH3COOH and 500 mL of 0.100 M NaOH B. a solution made by mixing 100 mL of 0.100 M CH3COOK and 50 mL of 0.100 M KCl C.

What happens during interphase?

What are the forces that create electromagnetism?

The use of fertilizers in agriculture has significantly altered several nutrient cycles including:

If 31.6 g of KMnO4 is dissolved in enough water to give 160 mL of solution, what is the molarity? AND what mass of oxalic acid, H2C204, is required to make 300 mL of a. 74 M solution?

From where do the kinetic tiles collect energy?

For the reaction 2Fe + 3Cl2 → 2FeCl3 which of the following options gives the correct reactant:reactant ratio? Fe:Cl2 = 1:1 Fe:Cl2 = 2:3 Fe:Cl2 = 3:2 Fe:FeCl3 = 1:1

A 2.575 g piece of gold (specific heat = 0.129 J/g°C) at a temperature of 75°C is placed into cold water at 10°C. If the gold loses 10.0 J of energy, what is its final temperature in the water? Enter your answer to the nearest whole number of °C.