When the reaction was actually preformed in the lab 37 g of lithium chloride was produced. What is the percent yield of lithium chloride?

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

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.

Convert the temperature of dry ice, –77 ∞c, into degrees fahrenheit and kelvin.