How many molecules are in one mole of NH3?

Why are burning candles and rusting nails examples of chemical change?

For C2H5OH (liquid) So = 161 J/K. mol; for C2H5OH (gas) So = 282.6 J/K. mol. What is ΔS if 92 g of C2H5OH is evaporated? a) 111.5 J/K b) 243.2 J/K c) 121.6 J/K d) 2.31 J/K e) - 121.6 J/K

How many grams of sodium sulfate are needed to make 750.0mL of 0.215 M sodium sulfate solution?

A molecular biologist measures the mass of cofactor a in an average yeast cell. the mass is 74.06 pg. what is the total mass in micrograms of cofactor a in a yeast colony containing 105 cells

Given the equation 2 CO + O2 - > 2CO2, how many grams of CO2 form if 34.0 grams of CO are combined with excess oxygen? a) 53.4 b) 21.6 c) 145 d) 107 This question is really confusing to me, and I'm not even sure how to go about answering it.

How many atoms are there in 2.3 grams of H?

Which of the following would dissolve in water, and why? None of these substances would dissolve in water Candle wax, it is a nonpolar substance Motor oil, its primary IMF is London Dispersion Forces Acetic acid, it ionizes into ions when added to

Have a region surrounding the central area called

1. Simplify. | A. O 16 B. O C. 04 D. O

What is the (H+), if the pH of a solution is 3.20?