In an old trunk, you find a piece of metal that you think may be aluminum, silver, or lead. you take it to a lab, where you find it has a mass of 114 g and a volume of 10.9 cm3. what is the metal you found? assume that densities of aluminium, silver, and lead are 2.70, 10.5, and 11.3 g/ml, respectively.

Liquid ammonia is produced at high temperatures and under great pressure in a tank by passing a mixture of nitrogen gas and hydrogen gas over an iron catalyst. the reaction is represented by the following equation. n2(g) + 3h2(g) → 2nh3(g) changing all but one experimental condition will affect the amount of ammonia produced. that condition is a) increasing the concentration of both reactants b) changing the temperature within the tank c) decreasing the pressure within the tank. d) increasing only the amount of nitrogen present.

Element j is 1s 2s 2p 3s . (i) how many unpaired electrons does j have? (ii) is j a good oxidizing agent or a reducing agent? (iii) state reason for the answer.

What are several ways to reduce the effect of friction