Which is a “big idea” for space and time? energy can be transferred but not destroyed. the universe consists of matter. forces describe the motion of the universe. the universe is very big and very old.

How many moles if mgcl2 are there in 340g of the compound?

Which of the following quantities is a scalar? i need plz someone !

9) a laser pulse takes 2.56 seconds to travel from earth to the moon and back. given that the speed of light 300000 km per second, how far away is the moon? show your calculations 10) calculate the moon’s density, in g/cm^3 given the moon has a mass of 7.3 x 10^22 kg and has a radius of 1.7 x 10^6 m.