Chemical reaction of octane burning: $2C_8H_18 + 25O_2 -> 18H_2O + 16CO_2$. Octane has a density of 703.00 kg/$m^3$, or 703.00 g/L. A gallon is 3.78541 L. What is the mass (in g) of 1.0000 gallon of octane?

Use "Dimensional Analysis" to determine what "conversion factors" you will need before you do the math. $g/"mL" xx "??"/"??" = "lbs"/"gal"$ We need a mass conversion unit ($g to "lbs"$)...

And so we put the given numbers in: $rho_"carbon tetrachloride"=(703.55*g-345.8*g)/(225*mL)=??g*mL^-1$ Because $1*g*mL^-1=1xx10^-3kg*(10^-3L)^-1=1xx10^-3kgxx10^3*L^-1=kg*L^-1$, the $"density"$ has the same figures in $kg*L^-1$. $"Carbon tetrachloride"$ will form an immiscible layer with water. Will...

Since 8x3=24 and since 12x3=36 you need to add 6oz of chemical B to have 24oz of chemical A and 36oz of chemical B. Take 1/3 of the total mixture...

Reweighing the candle before and after burning just shows how much fuel was burnt. Typical candle wax is an alkane such as hentriacontane, so write a chemical formula for the...

Physical changes are changes in the formation or state of molecules and atoms. The arrangement of the molecules and atoms is different after the change but the chemical composition of...

Combustion occurs between hydrocarbons and oxygen. Hydrocarbons always contain hydrogen and carbon, but they may contain oxygen. The products will always be $CO_"2"$ and $H_"2"O$.

Count on the number of atoms on each side of the equation. On the left hand side (or left of the arrow), C = 2 $xx$ 8 = 16 atoms...

A physical reaction occurs when the physical state of the substance remains the same despite what has happen to it. For instance, the tearing of paper is physical as it's...

So if you have $22.05*mol$ of this juice, there are $114.23*g*cancel(mol^-1)xx22.05*cancel(mol)=2519*g$, probably enuff to propel my motor for 30 km.

If we assume that the (23) of the gas has been compared to the density of $H_2$,then the molar mass of the gas becomes $46"g/mol"$ The organic compound burnt...