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Chemistry, 22.06.2019 07:30
The volume of helium in a blimp is 6.28 x 10^9 millimeters. the density of helium in the blimp is .1786 kilogram/meter^3. find the mass of the helium in the blimp.
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Chemistry, 22.06.2019 23:00
Consider the reaction: 2al(s) + fe2o3(s) โ al2o3(s) + 2fe(s) the ฮดhf for fe2o3(s) = -824.3 kj/mole. the ฮดhf for al2o3(s) = -1675.7 kj/mole. finish the equation. ฮดhrxn = [(1)( kj/mole) + (2)( kj/mole)] - [(1)( kj/mole) + (2) ( kj/mole)]
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Chemistry, 23.06.2019 03:00
A0.100-kilogram apple hangs in a tree 1.50 meter above the ground. ignore frictional effects, the total mechanical energy of the apples is
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