Calculate the empirical formula of the compound
A compound containing nitrogen and oxygen is decomposed in the laboratory and produces 1.78 of nitrogen and 4.05 of oxygen. Calculate the empirical formula of the compound.
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When 2.55 g of an unknown weak monoprotic acid (HA, molar mass = 85.0 g/mol) is dissolved in 250.0 g of water. Calculate Ka for the unknown acid.
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Determine the mass of silver phosphate formed when 4.33 g of silver nitrate is reacted with 22.7 mL of .118 M K3PO4
A 335 mL container holds 0.146 g of Ne and an unknown amount of Ar at 35°C and a total pressure of 628 mmHg. Calculate the moles of Argon present.
The final pressure is 15 times greater that the initial pressure. What is the final volume of the gas, assuming constant temperature.
If a 1500 rm kg car can accelerate from 30 km/h to 50 km/h in 3.1 s, how long will it take to accelerate from 50 km/h to 75 km/h? Assume the power stays the same, and neglect frictional losses.
A tile-iron consists of a massive plate maintained at 150°C by an embedded electrical heater. The iron is placed in contact with a tile to soften the adhesive, allowing the tile to be easily lifted from the subflooring
Write Lewis structures that obey the octet rule for each of the following molecules and ions. (In each case the first atom listed is the central atom.)
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