Used all my points with lesson 13: matter and energy unit test
science 7 a unit 2: matter and energy in organisms and ecosystems

1. which of the following can be expected to occur as climate change continues on earth

Citric acid has a ph between 1 and 3.  it is considered to be aa. weak acidb. weak basec. strong based. strong acid

Need asap question 1 minerals are organic compounds. true false question 2 what vitamin can be found in foods like oranges, grapefruits, and broccoli? a. vitamin a b. vitamin k c. vitamin c d. vitamin d question 3 what are minerals? a. chemical elements that are needed for body processes. b. organic compounds that the body needs in small amounts to function properly. c. small molecules used to build proteins. d. an organic compound that is insoluble in water and includes fats. question 4 how many types of vitamins does the human body need? a. 15 b. 11 c. 13 d. 17 question 5 vitamins are a good source of energy. true false

Achemist needs to prepare a buffer solution of ph 8.80. what molarity of nh3 (pkb = 4.75) is required to produce the buffer solution if the (nh4)2so4 in the solution is 1.8 m?