Carbon-14 has a half-life of 5730 years. How long would it take 4 grams of Carbon-14 to decay to 1 gram of Carbon-14?

A: 1 year

B: 5730 years

C: 11,460 years

D: 17,190 years

During the day, the temperature of the sand in a desert rises as the sand is heated by the sun. After the sun sets, the sand cools. What happens to the heat energy in the sand as it cools? A) It is destroyed. B) It is used by the sand to do work.

Consider the chemical equation in equilibrium. 2H2 (g) + O2 (g) 2H2O (g) What will happen if the pressure of the system is increased? A. The reaction will not change. B. The reverse reaction will be favored. C. The reaction will stop completely. D.

What is radium used for

How are the elements contained within a group on the periodic table related? (select all that apply.) ?

How many moles of He are in 16 g of the element? 1.0 mol 4.0 mol 8.0 mol 16 mol

You aren't sure if your pH meter needs to be calibrated, so you put it in a buffer solution that has a known pH of 7. You take four separate readings of the solution with the pH meter. The meter reports the pH as 5.5, 8.6, 6.3, and 9.4.

If a solute in water has a concentration of 0.12 mg/mL and has a concentration in ether of 0.60 mg/mL, what is the distribution coefficient, K, between ether and water

Drag each title to the correct location identify each process as carbon source or carbon sink

Identify the period and group numbers of the element with the electron configuration. [Ne]3s23p4

The process of a material going through a change of state from a gas to a liquid is called