What is a subcategory of a period?

A. Era

B. Jurassic

C. Eon

D. Epoch

SC: Chris. Watts2000

Which type of reaction occurs when nonmetal atoms become negative nonmetal ions? A. oxidation B. reduction C. substitution D. condensation

Which characteristics are used to classify stars on the Hertzsprung-Russell diagram? Check all that apply. size density composition temperature absolute brightness

The alcohol content of hard liquor is normally given in terms of the "proof," which is defined as twice the percentage by volume of ethanol (C2H5OH) present. Calculate the number of grams of alcohol present in 1.00 L of 48-proof gin.

Calculate the density in g/mL of 2.0 L of gasoline that weighs 1.29 kg. How would I do this?

What are some circumstances under which the coase theorem fails to apply?

Is a gas that is produced by the ultraviolet radiation in the air in the vicinity of welding operations?

How much MnO2 (s) should be added to excess HCl (aq) to obtain 295 mL of Cl2 (g) at 25 °C and 735 Torr?

Why do people describe water as a universal solvent

What is litmus paper used for? To indicate if all the reactants have been used up to determine if a chemical reaction has occurred to determine pH to detect the presence of water

You open your lemonade stand with 100 lemons, 5 bags of sugar containing 6 cups each, and 10 gallons of water (16 cups per gallon). Which statement is NOT true about the production of lemonade in your stand?