Questions 1.
Determine the empirical formula of the oxide of magnesium. (Think carefully about the precision
of each mass that you measured before you do this calculation. How many significant figures are
justified for each mass?)

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

Remember to use the proper number of significant figures and leading zeros in all calculations.gelatin has a density of 1.27 g/cm³. if you have a blob of gelatin dessert that fills a 2.0 liter bottle, what is its mass? 2540 g2500 g3.9 x 10-43.937x 10-4

In the space, show a correct numerical setup for calculating the number of moles of co2 present in 11 grams of co2