Which substance has one proton and one neutron?
a. h-1
b. h-2
c. he-1
d. he...
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Chlorophyll a had the molecular formula c55h72mgn4o5 how many atoms are in this molecule
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Asample of tin (ii) chloride has a mass of 0.49 g. after heating, it has a mass of 0.41 g. what is the percent by mass of water in the hydrate? %
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Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.
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What is the pressure of 0.500 moles of carbon dioxide gas in a 2.5 l tank and at a temperature of 301 k? (r=0.0821 l·atm/mol·k) 3.08 atm 1.2 atm 0.23 atm 4.01 atm 4.94 atm
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