Sodium nitride has the formula Na3N, What is the formula for magnesium nitride?
a) Mg2N c) Mg3N2
b) Mg3N d)
What is the mass of one mole of aluminum sulfate, Al2(SO4)3?
a) 630 g c) 273 g
b) 342 g d) 123 g
Which set of coefficients balances the equation for the complete combustion of ethane, C2H6?
_C2H6 + __027_002 + _H20
a) 1,3,2,3 c) 2,6,4,5
b) 1,6,2,6 d) 2,7,4,6

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

How many moles are in 123.0 grams of kclo4?

Of element x has 22 protons, how many electrons does it have