Determine the number of collisions do the he atoms
Determine the number of collisions do the He atoms make with this surface in 15 seconds when a solid surface with dimension 3.5 mm* 3.0mm is exposed to helium gas at 90 Pa and 500K.
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Determine the mass of FeO and Fe2O3 in the original sample. You are given 10.00 grams of a mixture of FeO and Fe2O3. Complete reduction of this mixture yields 7.58 grams of pure Fe.
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Calculate the density of the heated air in the balloon when a small hot-air balloon is filled with 1.02 x 10^6 L of air (d = 1.20 g/l). As the air in the balloon is heated. It expands to 1.13 x 10^6 L.
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Calculate an empirical formula of the compound that was produced if 5.40g of bromine reacted with 8.58g of iodine. Calculate the molecular formula of this compound if we know that its molar mass is 206.8g?
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