1 In the separation of air into its gases: a why is the air compressed and then expanded?
b why is argon obtained before oxygen?
c what do you think is the biggest expense? Explain.

If 3.00 g of titanium metal is reacted with 6.00 g of chlorine gas, cl2, to form 7.7 g of titanium (iv) chloride in a combination reaction, what is the percent yield of the product?

Predict the products butane (c4h10) + oxygen —>

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