Answers: 3
Biology, 21.06.2019 18:00, shelbyo1123
The phlogiston theory in the 17th century attempted to explain burning. the theory stated that combustable objects contained a material called phlogiston, a substance without mass, color, odor, etc. after objects burned, the objects were dephlogistonated and were then in their true form. the phlogiston theory was accepted until the 18th century, when lavoisier proved that combustion requires a gas that has mass. phlogiston is considered a) to be scientific knowledge b) not to be scientific knowledge c) to be proven by scientific method d) to be accepted in the modern scientific community
Answers: 2
Biology, 22.06.2019 09:30, preservations
Phosgene is a chemical agent that is formed by decomposition of chlorinated hydrocarbon solvents by ultraviolet radiation. a. false b. true
Answers: 1
Biology, 22.06.2019 09:30, xmanavongrove55
Chloroplasts and bacteria are in size. a. similar b. at different ends of the size range c. exactly the same d. none of these
Answers: 2
Biology, 22.06.2019 10:10, lucygperez4099
What is a photon? a. part of a ribosome b. a light particle c. a carbon dioxide molecule d. part of a chloroplast b. a light particle
Answers: 2
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