PLEASE HELP ME OUT!!

Acids are made with compounds made of a nonmetal and .
a. oxygen b. carbon c. sulfur d. nitrogen

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?

Match the formula for the following compound:   magnesium sulfate heptahydratemgs·7h2omg2so4·7h2omg(so4)2·7h2omgso4·7h2o

Most ionic compouds are crystalline solids at room temperature. true falseionic compounds are electrically neutral. true falseionic compounds generally have low melting points. true falsewhen melted, ionic compounds do not conduct electricity. true falsethe electrostatic attraction between an anion and a cation is an ionic bond. true false