For the reaction 2KlO3 --> 2KCl + 3O2, how many moles of potassium chlorate are required to produce 250 g of oxygen? a. 2.0 mol
b. 5.2 mol
c. 4.3 mol
d. 4.9 mol

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

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

Miner's coal distributors does not mine coal itself, nor does it even store or handle the coal. instead, miner's solicits orders for low sulfur coal from other firms, then purchases the required amount from suppliers and directs them to ship the coal to its customers. what is miner's