Chemistry, 10.10.2019 18:10 autumnskye1
Which element has the same number of valence electrons as calcium?
sulfur
potassium
neon
barium
Answers: 1
Chemistry, 23.06.2019 01:00
The time that is taken by neptune once around the sun is called
Answers: 1
Chemistry, 23.06.2019 02:00
Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium
Answers: 1
Chemistry, 23.06.2019 11:00
Which of the following reactions is endothermic? h2(g) + ½ o2(g) h2o(g), h = -57.82 kcal ½n2(g) + o2(g) + 8.1 kcal no2(g) ½ n2(g) + 3/2 h2(g) nh3(g) + 11.0 kcal c(diamond) + o2(g) co2, h = -94.50 kcal
Answers: 2
Chemistry, 23.06.2019 15:00
20 look at the clock and the data table below. based on the data and on your knowledge of potential and kinetic energy, what is the best conclusion you can make about potential and kinetic energy? the total amount of energy stays the same. the clock has the most potential energy at point b since it is moving the fastest. there is always more potential energy than kinetic energy. potential energy can never be 0, but you can have 0 kinetic energy.
Answers: 1
Which element has the same number of valence electrons as calcium?
sulfur
potassi...
sulfur
potassi...
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