The reaction written correctly is: 2NiO (s)--> 2Ni(s) + O2 (g) 1. Divide 25.67g NiO by the formula its mass to get the number of moles of NiO. 2. Since 2 moles NiO produce 1 mole O2, moles of O2 = ( ___mol NiO)(1/2) 3. Look up the vapor pressure of water, P(vapor), at 40.0 ...
Yes, since we have only two groups of valence electrons around the central atom, C: H : C : : : N :
Most fuels are molecular (covalent) compounds as bobpursley pointed out. Ionic compounds do not burn. Note: Some ionic materials may decompose violently or support combustion (NaNO3, KClO4, etc.) Cesium sulfide is a stable compound that does not burn. Other flammable materials...
The unbalanced chemical equation is: H2SO4 + Pb(OH)4 --> Pb(SO4)2 + H2O Balancing the SO4 groups (2 of them): 2H2SO4 + Pb(OH)4 --> Pb(SO4)2 + H2O Balancing the H's (8 of them): 2H2SO4 + Pb(OH)4 --> Pb(SO4)2 + 4H2O
The phosphate formula depends on the oxidation state of the vanadium ion. For example, vanadium(III) phosphate would be VPO4 and vanadium(II) phosphate V3(PO4)2.
AP Chemistry (repost)
Check the previous post at: http://www.jiskha.com/display.cgi?id=1260062043
Every chemical reaction involves definite mole ratios. That is the meaning of stoichiometry. A baking cake involves several complex chemical changes with precise mole ratios of reactants and products to each other. That is difficult to show and has little to do with the propor...
(a) A high activation energy may slow down a spontaneous reaction to the point that it does not occur at a visible rate. (b) A reaction is spontaneous because it leads to lower potential energy (deltaH is negative) and/or it increases entropy (deltaS is positive). DeltaH and d...
No such thing as cis/trans cyclohexane. However, there is such a thing as cis- or trans- 1,2-dimethylcyclohexane. There must be two non hydrogen atoms or functional groups attached to two different carbon atoms on the cyclohexane ring to get this type of isomerism. cis/trans i...
Cu^+2 ions in an electrochemical cell would tend to be reduced to Cu. The half cell potential is +0.159 volts. MnO4^-, MnO2, and Mn^+2 (in MnCl2) are all oxidizing agents and tend to take electrons from a reducing agent. They could not provide electrons for the reduction of Cu...