Which of the following is a complete chemical equation for an acid/base neutralization reaction? 2 Ba(OH)₂ + 2 NaNO₃ 2 NaOH + 2 Ba(NO₃)₂
H⁺ + OH⁻ H₂O
Li + AgOH LiOH + Ag
Sr(OH)₂ + H₂SO₄ SrSO₄ + 2 H₂O

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

To find the work done, the force exerted and distance moved are multiplied. a couch is moved twice before you are happy with its placement. the same force was used to move the couch both times. if more work is done the first time it is moved, what do you know about the distance it was moved? a) when more work was done, the couch was moved the same distance. b) when more work was done, the couch was moved less. c) when more work was done, the couch was moved further. d) when more work was done, the couch wasn't moved at all.

What type of energy conversion occurs when you place your feet near the fire place and they become warm