If I added 80g of sodium nitrate to 100g of water at 75 degrees Celsius, how much more would I need to make it saturated?

Write the chemical symbols for three different atoms or atomic cations with 27 electrons. asap!

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

Earth's axis of rotation is tilted at an angle of 23.5 degrees. what is one change you would see on earth if its axis was not tilted?