1-What is the volume in liters of 1.14x10^21 molecules NO2 at STP? 2-What is the mass of 5.07 mole N2?
3-Convert 35.5g NH3 to particles
4-Convert 18.82 L NO gas (STP) to grams:
5-How many molecules of CH4 are in a 24.7g sample?
6-How many atoms of iodine are in 12.75g of CaI2?
7-How many kilograms of lead (IV) nitrate are present in 2.275x1026 formula units?
8-Convert 27.2g Li2S to liters
9-What is the mass in grams of 75.5L of CO2 gas (at STP)?

Absalon adds 1 g of salt to 1 l of room temperature water (25 °c). then, he starts a timer and observes what happens. he notices that it takes 1 minute for the salt to dissolve. he decides to repeat his experiment, and he adds 1 g of salt to another 1 l of room temperature water (25 °c). after he adds the salt, he starts a timer. but, instead of watching the salt dissolve, he stirs the salt and water with a spoon until it dissolves. he notices that it only takes 30 seconds for the salt to dissolve in his second experiment. why does the salt dissolve faster in absalon's second experiment? stirring the salt and water increases the polarity of the water molecules, which causes the ionic bonds of the salt to break. stirring the salt and water increases particle motion, which causes more collisions to occur between the water and salt. stirring the salt and water increases the surface area of the water, which causes more collisions to occur between the water and salt. stirring the salt and water increases the pressure on the solution, which causes the ionic bonds of the salt to break.