What is the total number of moles of ca needed
Given the reaction: Ca + 2H2O → Ca(OH)2 + H2
What is the total number of moles of Ca needed to react completely with 4.0 moles of H2O?
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Microwave ovens use microwave radiation to heat food. How many photons are required to heat 200. mL of coffee from 19°C to 64°C?
Sample of aluminum chloride increased in temperature by 3.5 K when the sample absorbed 167 J of energy. Calculate the number of moles of aluminum chloride in the sample. the C for aluminum chloride is 92 J/mol*K.
Determine the molar mass of chloroform gas if a sample weighing .389 grams is collected in a flask with a volume of 102cm cubed at 97 degrees Celsius. The pressure of the chloroform is 728 mmHg.
A sample of oxygen at 48 C occupies 622 mL.If this sample later occupies 1252 mL at 55 C and 1.4 atm, what was its original pressure? Answer in units of atm.
A three-span continuous beam ABCD with three equal spans supports a uniform load with intensity q. Determine all reactions of this beam and draw the shear force and bending moment diagrams labelling all critical ordinates
A student dissolves two moles of Mg(NO3)2 into a beaker of water. How many nitrate ions are present in the solution?
Calculate the concentration of a monotropic basic solution, given that 99.3mL of the basic solution is neutralized by 83.0mL of a 0.0325M solution of HCl.
A student combusts 504.96 grams of ethene gas, C2H4. How many liters of CO2 (g) are produced at a pressure of 0.993 atm and a temperature of 295 K? C2H4 (g) + 3 O2 (g) -> 2 CO2 (g) + 2 H2O (g)
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