Sam wished to investigate how fertilizer run-off affects the growth of algae in
freshwater lakes and streams. He set his experiment up in this way. He placed
900 ml of water into each of five 1000 ml glass beakers. To each beaker he
added 5 ml of water from an aquarium which contained a large concentration of
algae. The beakers were placed under a grow light which was timed to provide 12
hours of light each day. Liquid fertilizer was added to the beakers in the following
amounts: Beaker A - 8 ml fertilizer, Beaker B - 6 ml fertilizer, Beaker C - 4 ml
fertilizer, Beaker D - 2 ml fertilizer, and Beaker E - no fertilizer. Each week a
random sample from each of the beakers was examined under a microscope to
get a count of the number of algal cells present. Which of the following is the
control group for this experiment?
Answers: 2
Chemistry, 22.06.2019 18:30, losalobos46
The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false
Answers: 1
Chemistry, 22.06.2019 22:30, teagan56
Gusing the milligrams of ascorbic acid you entered above, the ratio of total sample volume to aliquot volume, and the total milligrams of the vitamin c tablet that you dissolved, calculate the mass of ascorbic acid in the vitamin c tablet for each trial. do this by scaling up to find the amount (mg) of ascorbic acid in your 250 ml flask. enter your calculated mass of ascorbic acid in the vitamin c tablet, for each trial. be sure to enter your calculated mass in the corresponding order that you entered your milligrams of ascorbic acid. the milligrams of ascorbic acid you entered for entry #1 previously should correspond to the mass of ascorbic acid that you enter for entry #1 here.
Answers: 1
Chemistry, 23.06.2019 10:10, Kennethabrown09
In a covalent bond, two atoms are held together by the attraction between . the number of covalent bonds that an atom can form depends on the number of in the atom.
Answers: 2
Sam wished to investigate how fertilizer run-off affects the growth of algae in
freshwater lakes an...
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