Select the isotope for the species shown here: -3 O 41 20 5A Cht Cg* SA 26 +2 12 O -3 O 57 A 27 ch​

At stp, which substance is the best conductor of electricity? a. nitrogen b. neon c. sulfur d. silver

How many grams of phosphorus are contained in 5.09 moles of phosphorus?

While in europe, if you drive 125 km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car’s gas mileage is 32.0 mi/gal? assume that 1 euro=1.26 dollars