Which of the following statements is true about ions? a. anions are positively charged ions. b. cations are common among nonmetals. c. charges for ions are always written as numbers followed by a plus or minus sign. d. when an anion forms, more electrons are transferred to it.

In a laboratory experiment, a fermenting aqueous solution of glucose and yeast produces carbon dioxide gas and ethanol. the solution was heated by burning natural gas in a bunsen burner to distill the ethanol that formed in the flask. during the distillation, the ethanol evaporated and then condensed in the receiving flask. the flame of the burner was kept too close to the bottom of the flask and some of the glucose decomposed into a black carbon deposit on the inside of the flask. during this experiment the following changes occurred. which of these changes involved a physical change and not a chemical change? check all that apply. 1-condensation of ethanol 2-evaporation of ethanol 3- formation of carbon dioxide gas from glucose burning of natural gas 4-formation of ethanol from glucose by yeast 5-formation of a carbon deposit inside the flask

What is the percentage of hydrogen in nitrogen trihydride

In what environment would mineral formation caused by high pressures and high temperatures most likely occur?