One mole of water is equivalent to 18 grams of water. a glass of water has a mass of 200 g. how many moles of water is in this?

Which of the following is true about an object in free fall? its acceleration depends on its mass. it has no inertia. it pulls on earth, and earth pulls on it. its momentum is constant.

Identify the type of synthetic material used in each object

Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.