Other Chemistry Answers

Fictitious element X has an a average atomic mass of 254.9 and only 2 isotopes, One of its isotopes has an abundance of 72.00 and a mass of 250.9 amu. What is the atomic mass of the second isotope?

When 2.5 grams react, the will produce how many grams of reactant in a complete chemical reaction?

If a 0.3753 g sample of sodium bicarbonate (80.9%) is titrated with 0.9155N sulfuric acid, what volume of the acid should be required to produce an end point?

When heated in air, 1.63 grams of metal combine with 0.40 gram of oxygen to
form metal oxide .Calculate the %composition of the metal.

A fuel tank used in a barbeque contains 1.09 x 10-1 moles of propane, C3H8(g). How many molecules of propane are in the tank?

Combien de moles d'acide phosphoruqe retrouve-t-on dans un echantillon possédsnt 8,97 x 10 a la 22 atomes d'hydrogène ?

methanol is burned in a camp stove to provide heat for cooking if 18 g of methanol is burned what will the volume of oxygen measured at 37°C and 98.8 KPA required for complete combustion

Explain briefly the reasons for the following observations supporting your discussion, wherever possible by means of balanced chemical or ionic equations or structures
i) When mineral pyrolusite, MnO2, is mixed with sodium carbonate and the mixture melted in presence of air, the melt is coloured green. When the cooled melt is dissolved in water, the solution formed made just acidic, a brown precipitate forms. The solution that results is purple coloured

Which nuclear radiation has speed equal to the speed of light?