The half-life of radium-226 is 1,600 years. It decays into radon-222. What fraction of the original amount of radium-266 in a sample will still be raisin after 8,000 years? (Marking brainliest if correct, lots of points!) A. 1/8
B. 1/32
C. 1/4
D. 1/16

In a sample of oxygen gas at room temperature, the average kinetic energy of all the balls stays constant. which postulate of kinetic molecular theory best explains how this is possible?

Which of the following compounds does not contain molecules? question 2 options: co2 h2 nacl h2o

Select the correct answer how does the heat content of the reaction change in the process of photosynthesis when a glucose molecule is formed? ca the value of is negative the value of qis positive the value of a remains constant the value of a decreases the value of equals zero e