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2Mg + O2 + 2MgOHow many grams of MgO are produced when 40.0 grams of O2 react completely with Mg?
A. 101gB. 60.8gC. 30.4gD. 201gE. 50.4g
Determine the volume of the methane at STP if bacterial culture isolated from sewage produced 35.5 mL of methane, CH 4 , at the temperature of 31 degree Celsius and at pressure of 753 mmHg.
Determine the molality and molarity of the HCL, if the solution has a density of 1.20 g/ml.
Trees in cold climates may be subjected to temperatures as low as -60 C. Estimate the concentration of an aqueous solution in the body of the tree that would remain
The cell constant of a conductivity sell is equal l/A. The resistance of the NaCl solution is found to be 254 Ω . Using the same sell the resistance of the 0.05 M KCL is found to be 467 Ω . Estimate the NaCl concentration if the molar conductivity ..
A sample of neon gas has a volume of 282 mL AT 160 degrees celsius. The sample is cooled at constant pressure to a volume of 685 mL. What is its new temperature?
The second container is kept at 149.2 K. What is the volume (in liters) of nitrogen gas in container 2? Containers are kept at a constant pressure.
How many carbon atoms are present in the smallest ketone which cannot exhibit enol-keto tautomerism
Consider the following reaction: 2A + B → 3C + D If 63.0 mol A and 42.0 mol B react to form 54.0 mol C. What is the percent yield of this reaction.
A chemist is commissioned to produce 50,000 liters of 0.550 M aqueous phosphoric acid. The chemist can purchase solid, 98.64% pure, phosphoric acid to dissolve in water. How many grams of this reagent are required?
Calculate molar absorbancy of PAP if its diluted solution has an A280 =0.272.The cuvette's width is 1 cm.
What must be the initial temperature of 22g of steam that is mixed with 90g of water at 68 degree celcius in an adiabatic calorimeter with a heat capacity of zero and that produces
Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and that the alcohol vaporizes at 25.
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