Which development in human history first made waste disposal a problem?

A. Decrease in birth rate

B. Growth of cities

C. Increase in agriculture

D. New diseases

Is it likely that scientist can live outside of Earth for along period of time, with only sustaining themselves wtih oxygenfrom plants in which they carried with them to the outerjourney?

Which of these is an ionic compound? A NO2 B LiCl C SO3 D CO

How many liters of water are added to 165 grams of magnesium nitride to make 2.40 M solution

To explain the photoelectric effect, Albert Einstein linked the photoelectric effect to an idea from which scientist?

When very electronegative atoms, like oxygen, bond to atoms with lower electronegativity, like hydrogen, what's the result?

If you have 6 moles of CH4 how many moles of H2O can be produced

What is the definition of substance in your own words.

A 1.3 g sample of gold (specific heat capacity = 0.130 J/g °C) is heated using 86.9 J of energy. If the original temperature of the gold is 25.0°C, what is its final temperature?

In what applications might coal replace petroleum based fuel

How many molecules are in 7.5 mol of h2o