7. A pupil was asked to investigate three metal oxides XO, Y20 and ZO. On heating strongly, XO broke down into a metal X and oxygen. The other two oxides did not break down.
a) From this evidence what can be deduced about the reactivity of metal X?

b) How could you test Y20 and ZO in order to find out which was the more reactive of the metals Y and Z?

The gulf stream is a warm water current that flows away from the equator to northern europe. witch of these does it cause. a. crashes of warm and cool water in the ocean b. colder climates near the equator c. large waves on the cost of europe d. warm climates in northern europe

What are the constituent metals of stainless steel?

Tooth enamel consists mainly of the mineral calcium hydroxyapatite, ca_10(po_4)_6(oh)_2. trace elements in teeth of archaeological specimens provide anthropologist with clues about diet and diseases of ancient people. students at hamline university measured strontium in enamel from extracted wisdom teeth by atomic absorption spectroscopy. solutions with a constant total volume of 10.0 ml contained 0.726 mg of dissolved tooth enamel plus variable concentrations of added sr. added sr find the concentration of sr in the 10 ml sample solution in parts per billion = ng/ml. find the concentration of sr in tooth enamel in parts per million = mu g/g.