If the pKa of a weak acid is 6.00, what is the usable pH range of the buffer?

The speed of light is around 6.706×10^8 miles per hour. what is the speed of light in units of miles per minute?

Which aqueous solution of ki freezes at the lowest temperature? 1) 1 mol of ki in 500. g of water 2) 2 mol of ki in 500. g of water 3) 1 mol of ki in 1000. g of water 4) 2 mol of ki in 1000. g of water

An alpha particle is: a hydrogen atom a nucleus of helium two neutrons an electron