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Chemistry, 22.06.2019 13:30
How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.
Answers: 1
Chemistry, 22.06.2019 15:00
Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.
Answers: 2
Chemistry, 22.06.2019 20:30
Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.
Answers: 1
Chemistry, 22.06.2019 23:40
The kw for water at 0 °c is 0.12× 10–14 m2. calculate the ph of a neutral aqueous solution at 0 °c.
Answers: 2
When you breathe the first step is that your lungs expand. why is this step needed...
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