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A transformer has 50 turns in its primary and 250 turns in its secondary. 12-V ac is connected to the primary. What is the output voltage?
How many grams of CaCl2 are needed to make 968.1 g of a solution that is 35.5% (m/m) calcium chloride in water? (Note that m/m has the same meaning as w/w.)
what would be the approximate freezing point of 0.1 molar aqueous solution of aluminium chloride at room temperature
A tidal bore is moving at 5 m/s into a stagnant basin of depth 1 m. What is the depth of water behind the bore?
A 250.0-L cylinder contains 65.0% He(g) and 35.0% Kr(g) by mass at 25.0° C and 1.35 atm total pressure. What is the partial pressure of He in this container?
A company has a large vat of brine containing 5.0% salt (95% water) and wishes to prepare 45 kg batches of brine having salt content varying from 6.0% to 3.0.
In an experiment using 2 nM of fumarase, what is Vmax? What is the catalytic efficiency of fumarase
Explain ten methods of preparation of cycloalkanes from straight and branched alkanes
A heater burns normal butane (n-C4H10) using 40.0 percent excess air. Combustion is complete. The flue gas leaves the stack at a pressure of 100 kPa and a temperature of 2600C.
Chlorine has two stable isotopes Cl-35 and Cl-37. If their exact masses are 34.9689 Amu and 36.9695 amu, respectively, Explain what is the natural abundance of Cl-35. The atomic mass of chlorine is 35.45 amu
A mixture of He, Ar and Xe has a total pressure of 2.70atm. The partial pressure of He is 0.450atm as well as the partial pressure of Ar is 0.200atm. Explain what is the partial pressure of Xe
An unknown solution containing Yellow five dyes displays an absorbance reading of 0.628. Explain the molar extinction coefficient for Yellow 5 dye is 27300 L/mol cm. Explain what is the concentration (in M) of Yellow five in the unknown solution
A mass of 2.50 g of hydrated copper(II) sulfate is placed in a crucible and heated. On heating, 1.59 g of white anhydrous copper(II) sulfate is left behind. Determine the ratio of water to copper(II) sulfate.
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