How can aquifer, evaporation, ground water and runoff be classified

Explain how mass is conserved when a candle burns.

Air has 21% oxygen by volume. Oxygen has a density of 1.31 g/L. What is the volume in liters of a room that holds enough air to contain 55 kg of oxygen

What are the reactants and products of fermentation?

A hydrated salt is a solid that includes water molecules within its crystal structure. A student heated a 9.10-gram sample of a hydrated salt to a constant mass of 5.41 grams. What percent by mass of water did the salt contain? (1) 3.69% (3) 40.

What is the correct noble gas configuration for sr?

When an electron moves to another orbital farther from the nucleus, does it gain or lose energy?

A magnesium atom has 2 valence electrons in its third shell. Which is a TRUE statement about what happens when it forms an ion? A. It will be an anion. B. It will have more electrons than protons. C.

Which of the following types of coal has the highest energy content and produces the fewest polluting chemicals?

When nitrogen is removed from a sample of tha air in the process of nitrogen fixation, what happens to the patial pressure of nitrogen the sample?

How is density related to buoyancy