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20cm3 of methane was released with 18cm3 of oxygen and it exploded.Calculate the volume of the resulting gas after the reaction mixture was cooled to room temperature.

Lead (Pb) (average atomic mass 207.19 amu) has three naturally-occurring isotopes, Pb206, Pb207and
Pb208 with isotopic masses of 205.98 amu, 206.98 amu and 207.98 amu respectively. If the isotopes Pb207and Pb208 are present in equal amounts, calculate the percent abundance of each isotope of Pb, which are, Pb206, Pb207 and Pb208.

If 0.2F of electricity is passed through a solution of dilute sulphuric acid during electrolysis calculate the mass and volume of hydrogen gas.

0.00285 kg of C2H6 (g) = ? mL (STP)

Answer needs to be In mL

To obtain the data needed to plot a titration curve for the titration of a weak acid with a strong base, a chemist used 50.00 mL of 0.10mol/L of citric acid with 0.10 mol/L NaOH(aq). Calculate the pH of the resulting solution at the equivalent point.

he rate constant of the reaction is 10.5 x 10*-3 when hcl conc is 0.1 mol. calculate second order rate constant

Sodium iodide and chlorine gas undergo a single displacement reaction, as represented by the following equation: 2Nal (s) +Cl 2(g) I 2(s) +2NaCl (s) If 4.0 g of sodium iodide and 4.0 g of chlorine gas are added to the reaction chamber, what is the actual yield of sodium chloride if the percentage yield of the reaction is 67%

Hi, The gas-phase reaction of NO with F2 to form NOF and F has an activation energy of Ea = 6.30 kJ/mol and a frequency factor of A = 6.00×108 M−1⋅s−1 . The reaction is believed to be bimolecular: NO(g)+F2(g)→NOF(g)+F(g).What is the rate constant at 685 ∘C ?

How many moles of glucose does 1.2 x 1024molecules represent?

1.30cm3 of hydrochloric acid solution was titrated against 41.20cm3 of 0.05M sodium hydroxide solution. Calculate
i.The concentration of the acid in moles/dm3
ii.The concentration of the acid in grammes per dm3