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The oxide of 'N' element contains 33.33% of the element .The same element forms a chloride whose Vapour density is 59.25.Calculate equivalent weight , atomic weight and valency of the element ?
Discuss how plastics are used in everyday life and cutting edge technology and what the pitfalls are of plastics.
Coal combustion can affect freshwater or marine (saltwater) organisms in different ways. Describe the steps involved in one such way, from combustion to the effect(s) on one species or group of organisms.
Determine how much heat is released at constant pressure if 471.0 g of NO2 is produced,?
Illustrate the structures of the 6 bromoalkenes (with the molecular formula C5H9Br ) that have a branched C chain, and that show neither chirality nor E,Z isomerism.
Determine the Volume of air and partial pressure of nitrogen, oxygen, water vapor and air
Determines the rate constant for this reaction and express and determine how many mL of a 0.157M solution of KOH is required to react with 0.385g of CH 3 COOH?
Determine the mass of sodium phosphate that yields 1.00 g of calcium phosphate precipitate.
2.0 moles of a nonelectrolyte solute are added to 1.0 kg of an unknown solvent. The freezing point is depressed by 7.9 K. Calculate the molal freezing point constant (Kf?) for this solvent.
As per the Haber Process(N2(g)+ 3 H2(g)= 2 NH3(g) ) ,what mass of nitrogen should you see in the reaction If you must produce 700g of ammonia? Percent yield of this reaction = 70%
Write balanced chemical equations for the following reactions.
Determine what is the longest possible wavelength of light that could ionize an atom of bismuth if the first ionization energy of bismuth is Ei1 = +70 kJ/mol.?
I understand the rules for significant figures with multiplication/division, and adding/subtracting. But I am unsure of what to do when there is both multiplication and/or division, and adding and/or subtracting in the same question?
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