The rate of chemical rxn increases on powdering the reactants, why?

Gaseous methane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water. If of water is produced from the reaction of of methane and of oxygen gas, calculate the percent yield of water.

Which planet has the strongest winds in the solar system

Which one of the following solutions will have the greatest concentration of hydroxide ions? a) 0.100 M hydrochloric acid b) 0.100 M magnesium hydroxide c) 0.100 M ammonia d) 0.300 M rubidium hydroxide e) 0.250 M calcium hydroxide

What does it take to prove a hypothesis false? O A. It is impossible to prove a hypothesis false O B. At least ten examples O C. One counterexample O D. A poorly stated question

Fire is combination of what? example (water is a compound of hydrogen and oxygen)

Extend E1 Explain why the arrangement, movement and energy of particles change during changes of state.

What is in a banana? give me specifics?!

Addition of an excess of lead (II) nitrate to a 50.0mL solution of magnesium chloride caused a formation of 7.35g of lead (II) chloride precipitate. What was the molar concentration of chloride ions in the solution (in mol/L) ?

2.70 L of a gas has a pressure of 0.63 atm. What is the volume of the gas at 105 kPa?

Which statements describe Rutherford's model of the atom? Select all that apply.