Chemistry, 11.12.2019 15:31 einstein101
Why is it necessary to use models to study sub micro scope objects such as atoms and molecules?
a) these objects do not exist in the real world
b)these objects are too far away to see
c)these objects are too small to see
d)objects can only be described mathematically
Answers: 2
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Which of the following units is not an official si unit? mole liter kilogram ampere
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What is the approximate vapor pressure when the gas condenses at 70 degrees celsius
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Consider the story you just read. all but one of the choices below indicate that something is living.
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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.
Answers: 2
Why is it necessary to use models to study sub micro scope objects such as atoms and molecules?
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