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When 0.228 g of the hydrate ZnSO4•xH2O is heated, 0.128 grams of anhydrous ZnSO4 remains. What is the value of x in the formula for the hydrate?
Explain how a calibration curve could be used to determine an unknown quantity
What is the expected freezing point of an aqueous solution of 2.62 kg of nitric acid, HNO3 , in a solution with a total mass of 5.91 kg? Assume that the nitric acid is completely ionized.
An unknown gas is found to effuse at a rate that is 1.864 times faster than Br2 at the same temperature. What is the identity of the gas.
In Europe, gasoline efficiency is measured in km/L . If your car's gas mileage is 30.0 miles/gal, how many liters of gasoline would you need to buy to complete a 284- km trip in Europe?
If 0.176 moles of Mg have combined with 0.220 moles of O, what is the empirical formula of the product?
You have 75.0 mL of a 2.50 M solution of Na2CrO4(aq). You also have 125 mL of a 1.52 M solution of AgNO3(aq). Calculate the concentration of CrO4 2- after the two solutions are mixed together.
If 3.93 g of sodium borohydride contains 2.5 × 10^23 H atoms, how many moles of H are present in 36 cm^3 of sodium borohydride (of density 1.074 g/cm^3)? Answer in units of mol
A gas at 89.0°C occupies a volume of 0.67 L. At what Celsius temperature will the volume increase to 1.12 L
A calorimeter contains 27.0 mL of water at 11.0 C. When 2.10 g of X (a substance with a molar mass of 74.0 g/mol) is added, it dissolves via the reaction X{(s)}+H_2O{(l)} -> X{(aq)}
What causes cycloalkanes to have two less hydrogen atoms than similar alkanes that are open chain ones? i) What is the three dimensional structure of methane? Why?
What you need to know about Problems, The Ksp of La(IO3)3 is 1.0×10-11. Using activities, what is the molar solubility of La(IO3)3 in a 0.050 M solution of NaNO3?
Question enthalpy and entropy values are given and were asked to find boiling point of mercury
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