PLEASE HELP M What type of sunscreen can best reduce risk of melanoma? SPF 4 used daily SPF 4 used once a month SPF 15 or higher used daily SPF 15 or higher used once a month -this is science-

What is the relationship of air masses and the temperature of oceans?

What state of matter is ice a. liquid b. element c. solid d. gas

Consider the following reaction at equilibrium: c(s)+h2o(g)⇌co(g)+h2(g) predict whether the reaction will shift left, shift right, or remain unchanged upon each of the following disturbances. a) c is added to the reaction mixture. b) h2ois condensed and removed from the reaction mixture c) co is added to the reaction mixture d) h2 is removed from the reaction mixture.