Questions Answered

amsterdam11:
Group Title
I am sure that this one is different! The standard enthalpy change of formation values of two oxides of phosphorus are :
P4 + 3O2 >P4O6…
 updated one year ago
 9 replies
 No Medals Yet

amsterdam11:
Group Title
Which is the most volatile substance? Chlorine, fluorine, sodium chloride or sodium fluoride?
 updated one year ago
 11 replies
 1 Medal

amsterdam11:
Group Title
The eqns and enthalpy changes for two reactions used in the manufacture of sulphuric acid are:
S + O2 > SO2 Delta H = 300 kJ
2SO…
 updated one year ago
 17 replies
 3 Medals

amsterdam11:
Group Title
Mass number has no units, but when we use the eqn n= m/M, we say that m is in g. Why is that?
…
 updated one year ago
 23 replies
 3 Medals

amsterdam11:
Group Title
The following equations show the oxidation of carbon and carbon monoxide to carbon dioxide.
C (s) + O2 (g) > CO2 (g) Delta H =  x…
 updated one year ago
 24 replies
 3 Medals

amsterdam11:
Group Title
The following equations show the oxidation of carbon and carbon monoxide to carbon dioxide.
C (s) + O2 (g) > CO2 (g) Delta H =  x…
 updated one year ago
 15 replies
 2 Medals

amsterdam11:
Group Title
Could someone please help me with sqrt(3) tan2x=0
 updated 2 years ago
 60 replies
 5 Medals

amsterdam11:
Group Title
Limiting reactants! Could someone please explain it with these questions?
1. 4.04g of hydrogen gas is exploded with 16.00g of oxygen. What…
 updated 2 years ago
 8 replies
 2 Medals

amsterdam11:
Group Title
2C2H2 (g) + SO2 (g) → 4CO2 (g) +2H2O (l)
Calculate the mass of CO2 produced from the complete combustion of 1.00g of C2H2.
How do you do t…
 updated 2 years ago
 10 replies
 3 Medals

amsterdam11:
Group Title
How do you solve 2cosx+√(3)=0? So far, I have arccos(√(3)/2) but what is the trigonometric value of this?
 updated 2 years ago
 11 replies
 1 Medal

amsterdam11:
Group Title
How do you solve 2sinx1=0 without a calculator?
 updated 2 years ago
 26 replies
 4 Medals

amsterdam11:
Group Title
Where did the first cell come from?
 updated 2 years ago
 9 replies
 1 Medal