Explain why it is not possible to draw a skeletal structure for methane.

Oxygen and tin 4 chloride react form chlorine and tin 3 oxide

The Aurora Borealis or northern light occur when solar flares react with the atmosphere near the north poles. The Aurora give off colred light because electricity is flowing.

Which of the following are NOT generally associated with convergent margins? A. fault-block mountains B. volcanic mountains C. thrust faulted mountains D. folded mountains

Copper sulphate is used during laboratory preparation of hydrogen gas. Give reason.

The warmer water contacting the ice cube transfers energy to that ice cube through what process

Which carbohydrate strengthens plant cells?

F a bouncing ball has a total energy of 20 J and a kinetic energy of 5 J, the ball's potential energy isJ. If the kinetic energy of the ball decreases, then the potential energy will.

Assuming that each cubic centimeter of water has a mass of exactly 1 g, find the mass of 1.27 cubic meter of water.

Using the following thermochemical data, what is the change in enthalpy for the following reaction? Ca (OH) 2 (aq) + 2HCl (aq) → CaCl2 (aq) + 2H2O (l) CaO (s) + 2HCl (aq) →CaCl2 (aq) + H2O (l), ΔH = - 186kJ CaO (s) + H2O (l) →Ca (OH) 2 (aq), ΔH =

Approximately how much of the world's oil and natural gas reserves are believed to be in the arctic?