Chemistry, 19.08.2021 07:00 silvermansachs9189
Oxides of elements X and Y were dissolved in the water. The solution of element X oxide was pH 13, and element Y oxide was pH 11. What can you say about the position of elements X and Y in the periodic table?
Answers: 3
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The density of an unknown gas at 98°c and 740 mmhg is 2.50 g/l. what is the molar mass of the gas with work showed?
Answers: 1
Chemistry, 22.06.2019 09:30
What are scientists who study fossils called? ( a ) astronomers. ( b ) biologists. ( c ) geologists. ( d ) paleontologists.
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Chemistry, 22.06.2019 11:40
Enzymes affect the reactions in living cells by changing the
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Chemistry, 22.06.2019 12:30
Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.
Answers: 3
Oxides of elements X and Y were dissolved in the water. The solution of element X oxide was pH 13, a...
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