Which of the following is not needed to make a model of the water cycle

. an energy source

. water

. a closed container

. a drain

Explain how solubility guidelines can be used to predict the formation of a precipitate

Oxygen has a density of 1.43 g/l at stp. what is the density of oxygen at 1.30 atm?

What reaction would the chemical equation CH4 + 2O2 →2H2O + CO2 represent? combustion of methane replacement of methane formation of methane decomposition of methane

Identify the effect of increasing acidity on the solubility of the given compounds.

Which of the following is not a common use of gypsum? a. wallboard/drywall for homes b. a primary ingredient for toothpaste c. surgical splints and casts d. pH reducing agent for acidic soils

Write the ka expression for h2po4 - in water. click in the answer box to activate the palette.

Why are ethics important when considering experiments? O A. It is important that people are not harmed for the sake of science. O B. Scientists would not be able to get funding if their experiments were not ethical. O C.

When the pH value of a solution is changed from 2 to 1, the concentration of hydronium ions ... A) decreases by a factor of 2 B) increases by a factor of 2 C) decreases by a factor of 10 D) increases by a factor of 10

Nonmetals rarely lose electrons in chemical reactions because?

Does a steel marble have more kinetic energy than a ceramic marble