Chemistry, 17.07.2019 09:00 ipcmeaganlatham
Aray in the emission spectrum has a wavelength of 3.10x10^14 meters. given that the speed of light is 2.998x10^8m/. what is the frequency of the ray
Answers: 1
Chemistry, 22.06.2019 09:10
Which class of molecules functions as chemical signals? hormones water carbohydrates proteins
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Chemistry, 22.06.2019 10:00
3. how much energy in joules is required to evaporate .0005 kg of liquid ammonia to vapor at the same temperature? 4. how much energy ( in megajoules ) is given up by .75 kg of water at 0c when it freezes to form ice at 0c? 5. explain how heat works between and at critical temperatures?
Answers: 2
Chemistry, 23.06.2019 06:30
How can the number of core electrons be determined from the periodic table
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Chemistry, 23.06.2019 13:30
The zinc within a copper-plated penny dissolves in hydrochloric acid if the copper coating is filed down in several spots (so that the hydrochloric acid can reach the zinc). the reaction between the acid and the zinc 2h+(aq)+zn(s)→h2(g)+zn2+(aq) . when the zinc in a certain penny dissolves, the total volume of gas collected over water at 25 °c is 0.947 l at a total pressure of 743 mmhg . (vapor pressure of water is 23.78 mmhg at 25 °c .) what mass of hydrogen gas is collected? answer in appropriate significant figures
Answers: 3
Aray in the emission spectrum has a wavelength of 3.10x10^14 meters. given that the speed of light i...
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