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how many unshared electron pairs must be included in the lewis structure for water , H2O? a-0 b-1 c-2 d-3 f-4
a mole of n-hexane is confined in a volume of 0.500L at 600 K. What will be the pressure according to a) the ideal gas law and b) the van der Waals equation
The elements silver, molybdenum, and sulfur combine to form Ag2MoS4. What is the maximum mass of Ag2MoS4 that can be obtained if 8.63 g of silver
A sample of an unknown biochemical compound is found to have a percent composition of 45.46% carbon, 7.63% hydrogen, 10.60% nitrogen and the balance oxygen. What is the empirical formula for this compound
Determine the mechanism for the synthesis of p-nitroacetanilide from acetanilide and HNO 3 , nitric acid and H 2 SO 4 sulfuric acid?
A sample of an unknown gas with a mass of 3.24 g occupies a volume of 1.88 L at a pressure of 748 mmHg and a temperature of 20.0°C. If the unknown gas is composed of 2.78 g of carbon and the rest is hydrogen, what is its molecular formula
solution containing 1.00 g of barium nitrate (199.33g/mol) is combined with 500 mL of a solution containing 1.00 g of sodium sulfate (142.03 g/mol)
a sample of propane, contains 17.7 moles of carbon atoms. How many total moles of atoms does the sample contain.
Solve an equilibrium problem (using an ICE table) to calculate the pH of each of the following solutions. 0.17 M CH3NH2Cl
What mass of HCl is consumed by the reaction of 3.84 mol of magnesium?
The initial volume of the balloon is 5.00 L, and the pressure is 760 mmHg. The balloon ascends to an altitude of 20 km, where the pressure is 76.0 mmHg and the temperature is -50 degrees celsius. What is the new volume,V2 , of the balloon in liter..
If Kc is the equilibrium constant for a forward reaction, 2 A? B, what is Kc´ for the reaction 4 A? 2B? A) Kc B) Kc C) 2 Kc D) (Kc)2
Use bond enthalpy to estimate the enthalpy change for each of the following reactions: (a)H2C=O(g) + HCl(g) ---> H3C¬O¬Cl(g (b)H202(g)+2CO(g)
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