Which one of the following is considered a physical change in matter and not a chemical change?
O Color Change
O Energy/Temperature Change
O Odor Formation
O Change in Size

For the following dehydrohalogenation (e2) reaction, draw the zaitsev product(s) resulting from elimination involving c3–c4 (i.e., the carbon atoms depicted with stereobonds). show the product stereochemistry clearly. if there is more than one organic product, both products may be drawn in the same box. ignore elimination involving c3 or c4 and any carbon atom other than c4 or c3.

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

Which of the following are sources of revenue for media companies? a. direct sales to producers b.advertising and subscriptions c. online purchase d. capital investments