The half life of carbon 14 is 5730 years what fraction of the original c14 would you expect to be present in a fossil that is 28650 yeas old

A particle that orbits the nucleus in an atom is called a (n)

Question 1 the heat of vaporization δhv of dichloromethane ch2cl2 is 28.0 / kjmol. calculate the change in entropy δs when 210. g of dichloromethane condenses at 39.8°c.

The diving velocity of a falcon can reach 322 km/hr. If the falcon maintains this velocity for 7.2 seconds (0.002 hours), what will the displacement of the falcon be

If 100 mL of a 1.0 M solution is evaporated to a volume of 25 mL, what will be the concentration of the resulting solution? (1) 0.25 M (2) 0.50 M (3) 2.0M (4) 4.0 M 20 Mbot is the

Calculate the volume of a 0.323-mol sample of a gas at 265 K and 0.900 atm.

Iron metal has a specific heat of 0.449J/g°C. How much heat is transferred to a 5.00 a piece of iron, initially at 20.0°C, when it is placed in a beaker of boiling water at 1 atm? Use Q = mcAt formula For chemistry

Which type of change occurs when the electrons of two atoms interact to form an atomic bond?

Which of the following is considered electronically perfect? a) Potassium b) Magnesium c) Argon d) Chlorine

The area of the circular base of a can of dog food is 12.5 in. The can is 6 inches high. What is its volume?

What is the tested variable in the experiment?