Question 9 A strip of metallic magnesium was reacted with 100g of water. Mr. Kolex asked the students to observe the change
made from the moment the magnesium was dropped into the pure water until the final stage. After the reaction,
students were asked to calculate the mass of magnesium hydroxide produced
(2mks​

Gymnast always perform on padded mats. how does the mats protect the gymnast

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change

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.