Which two elements make up water?

oxygen and phosphorus

oxygen and hydrogen

hydrogen and sulfur

hydrogen and phosphorus

What does 5ppm of nitrate in water mean? What does it cause? Is it healthy? Etc.

Write the formula for the conjugate base of each of the following acids. HCl

What happens if you remove all of the carbon dioxide from the atmosphere?

A petroleum engineer wants to determine the average amount of petroleum in a given rock formation. Which of the following statistical measurements will provide him with this data? Mean Median Mode Range

Gold has a latent heat fusion of 64.5 J/g. How much energy is required to melt 20.0 g of gold?

Which law is known as the law of action-reaction

7. A 2.0 L container had 0.40 mol of He (g) and 0.60 mol of Ar (g) at 25°C. Which gas has a greater average kinetic energy? Which gas is traveling at a higher average speed? If Ar has an average speed of 431 m/s, what is the average speed of He?

Which of the following will allow more solute to be dissolved in a solvent? Choose all that apply. * Adding more solute Cooling the solution Agitating the solution Adding heat Using larger crystals

Calculate the average bond order for a p-o bond (such as the one shown in blue) in a phosphate ion.

Match the vocabulary terms to their definitions. 1. standard metric unit of length mass 2. a proposed explanation for a scientific problem hypothesis 3. standard unit of volume liter 4. the curved top surface of a liquid column control 5.