Chemistry, 28.03.2020 23:25 notorius315
HELP! I don't know how to solve this question and I'd really like a step-by-step explanation for it!
Weigh out 69.5 g of the compound which is 58.6 percent (m/m) oxygen. Dissolve it in 100 g of water. Report back the % (m/m) solution this makes.
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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
Chemistry, 23.06.2019 07:40
Did the detergents containing enzymes work better at removing stains than those containing no enzyme? why or why not?
Answers: 2
Chemistry, 23.06.2019 10:30
Amethod of separation that employs a system with two phases of matter, a mobile phase and a stationary phase, is called
Answers: 2
Chemistry, 23.06.2019 14:50
Use the bond energies provided to estimate δh°rxn for the reaction below. ch3oh(l) + 2 o2(g) → co2(g) + 2 h2o(g) δh°rxn = ? bond bond energy (kj/mol) c-h 414 c-o 360 c=o 799 o=o 498 o-h 464 use the bond energies provided to estimate δh°rxn for the reaction below. ch3oh(l) + 2 o2(g) → co2(g) + 2 h2o(g) δh°rxn = ? bond bond energy (kj/mol) c-h 414 c-o 360 c=o 799 o=o 498 o-h 464 +473 kj +206 kj -392 kj -91 kj -486 kj
Answers: 1
HELP! I don't know how to solve this question and I'd really like a step-by-step explanation for it!...
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