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1) f phosphorus (P), with an atomic weight of 31, combines with hydrogen (H), with an...

1) f phosphorus (P), with an atomic weight of 31, combines with hydrogen (H), with an atomic weight of 1, to form phosphine (PH3), how many grams of phosphorus would react with 18 g of hydrogen?

2) Aluminum (Al), with an atomic weight of 27, combines with oxygen (O), with an atomic weight of 16, to form the compound aluminum oxide (Al2O3). How much aluminum would be required to react completely with 88 g of oxygen

3) Using the Rydberg formula, find the wavelength of the line in the Balmer series of the hydrogen spectrum for m = 3. The value of Rydberg constant is 1.097 × 107 m–1 and n = 2 for the Balmer series. (Round the final answer to the nearest whole number.)

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