Chemistry, 04.08.2019 08:20 live4dramaoy0yf9
Ablue colored ice cube floating on hot water quickly melts to release its color. the cool, blue water moves downward. this downward movement of cold water in hot water demonstrates convection. in which of the earth's systems is heat distributed by convection? question 1 options: a. the atmosphere b. the earth's mantle c. the oceans d. all of these.
Answers: 1
Chemistry, 21.06.2019 15:50
Which of these reactions are redox reactions? check all that apply.cd + hcl ā cdcl2 + h2cucl2 + na2s ā 2nacl + cuscaco3 ā cao + co2 2zns + 3o2 ā 2zno + 2so2 ch4 + 2o2 ā co2 + 2h2o
Answers: 3
Chemistry, 22.06.2019 08:00
Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next
Answers: 2
Chemistry, 22.06.2019 18:30
What volume of a 0.0606 m solution of strontium bromide is needed to obtain 0.340 mol of the compound? question 42 options: a)5.61 l b) 3.4 l c) 600 ml d) 1 l e) 178 ml
Answers: 1
Chemistry, 22.06.2019 19:20
Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?
Answers: 3
Ablue colored ice cube floating on hot water quickly melts to release its color. the cool, blue wate...
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