Describe and explain the trends in reactivity in different groups of the periodic table, using your knowledge of electronic structure. [6 mark]

A bedroom has a volume of 118 m3 What is its volume in km3?

A 1.000 kg sample of nitroglycerine, C3H5N3O9, explodes and releases gases with a temperature of 1985°C at 1.100 atm. What is the volume of gas produced? 4 C3H5N3O9 (s) → 12 CO2 (g) + 10 H2O (g) + 6 N2 (g) + O2 (g) A 1.

Determine the number of moles 28.8 g Br2

A 425-ml sample of hydrogen is collected above water at 35°c and 763 torr. find the volume of the hydrogen sample when the temperature falls to 23°c, assuming the barometric pressure does not change. (vapor pressures of water : at 35°c, 42.

determine the percent error if the density of mercury is 13.534g/mL and you measured the density to be 13.000g/mL

Using special equipment which layer of the sun atmosphere is visible during a total solar eclipse

The characteristic flame test colors of metal ions are due to atomic emission spectra. Duscuss the relationship between the absoption and emission of light and the factors responsible for flame test colors.

Should a bartender use ice and scoop directly from ice machine or use an ice holding device and scoop to make drinks and refill drinks from

What classification should this reaction have? 4Al + 3O2 → 2Al2O3

If you start with 100 grams of a radionuclide, how much will you have after two half-lives have passed?