Consider the reaction below Na 2 CO 3 (aq)+CaCl 2 (aq) CaCO 3 (s)+2NaCl(aq) if the releases 39.4 kJ of energy, how many kilocalories does it release ? (1cal = 4.184J) (Round off answer to 2 decimal place)

A4.0-cm tall light bulb is placed a distance of 32.0 cm from a concave mirror having a focal length of 16.0 cm. determine the image distance

Madison lives near the ocean. she’s formed a hypothesis that increased concentrations of salt in the air speeds the corrosion of certain metals. if madison plans to test this hypothesis, she will have to deal with the following variables in her experiment: dependent variable: independent variable: one possible confounding variable:

This battery has a difference in potential energy between the positive terminal and negative terminal which units express this difference in energy