To create an isotopeof a certain element, you must vary a number of:

A. atoms

B. neutrons

C. protons

D. electrons

Select all that apply. Which of the following are producers? algae plants animals humans some bacteria

What substance is a diatomic molicule

The metal is observed to begin to melt when the temperature of its container is approximately 29°C. The metal is most likely

Which of the following is NOT true according to the kinetic theory of gases? a) molecules occupy negligible volume b) molecules move randomly in straight line paths c) molecules are NOT attracted to one another d) molecules lose energy after

1. Explain what is in a buffer. Discuss the function of a buffer. How will pH change when small amounts of acids or bases are added to the buffer solution?

At 20°C, a sample of H2O liquid and a sample of CO2 gas each have the same average kinetic energy. Why is one a liquid and the other a gas at this temperature?

34. Describe the spontaneous flow of heat between objects at different temperatures.

What happens to the biomass as energy decreases up the food pyramid?

Draw the lewis dot structures for each of the following molecules. show the resonance structures, if they exist A. O2 B. CO C. N2 D. SO2

What mass of water will be produced from 9.6 g of calcium hydroxide reacting with hcl