What is a mole? * A. A unit of counting equal to 6.02x10^23 objects
B. The SI unit for measuring the mass of a sample equal to 6.02x10^23 grams
C. The mass of one atom of any element
D. The mass of one atom of carbon-12, and no other element

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

You are making a solution of calcium chloride dissolved in water. you add solid, stir, and it dissolves. you add just a spatula tip full, stir, and the solid does not dissolve. how could you describe the solutions before and after adding the spatula tip amount

What is the magnitude of the force of gravity between to 1000 kg cars which are separated by distance of 25. 0 km on an interstate highway? the force between the two cars will be what