2Na + 2H2O → 2NaOH+ H2 How many grams of sodium would be needed to produce 1.00kg of sodium hydroxide?

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

A40 kilogram skier starts at the top of a 12 meter high slope. at the bottom, she is travelling 10 meters per second. how much energy does she lose to friction

How many joules of heat are required to raise thetemperature of 750 g of water from 11.0 °c to 19.0 °c?