Lithium reacts with oxygen to form lithium
oxide according to the equation: 4Li + 0, →
2L1,0. If 27.8 g of Li react completely with
32.0 g of Oz, how many grams of Li, are
formed?

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

Which fact supports the conclusion that there will be fewer farm managers in the future? a) a farmer manager’s duties vary by the type of farm. b) farm technology is replacing some administrative jobs c) farm managers often need experience but not education. d) administrative duties include budgeting and training staff.

Which branches of natural science include the study of an organism that lived 10 million years ago