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Choose the answer that shows a correctly balanced equation.
A) 2 NaOH + H2 SO4 -> Na2 SO4 + 2 H2 OB) NaOH + H2 SO4 -> Na2 SO4 + 2 H2 OC) 2 NaOH + H2 SO4 -> Na2 SO4 + H2 O
what specific property of diethyl ether is exploited here and why is it important to prevent the overheating of the reaction mixture?
what is the molar mass of glucose if 22.5g gives a freezing point of -0.930 C when dissolved in 250 g of water?
A piece of metal with mass of 147 g is placed in 50-mL graduated cylinder.The water level rises from 20mL to 41ml. what is the density of the metal?
why is preferable to use tflon or ungreased stopcock rather than greased stopcock in column chromatography experiment?
calculate the activation energy for a reaction if its rate constant increases from 10 to 45 s as the temperature increases from 298 to 315 k .
Calculate the volume of water required to reconstitute (also referred to as solubilize) the entire contents of the vial of ovalbumin to a final concentration of 6.1 mM.
A 28.5 g sample of an unknown metal is heated to 95.0C and then dropped into 58.0 g of water in a coffee-cup calorimeter. The temperature of the water rises from 23.5 C to 27.1C.
In a chemical reaction (unbalanced equation), AsF3 + C2Cl6 -> AsCl3 + C2Cl2F4, the theoretical yield of C2Cl2F4 was calculated to be 1.86 mol. If the percent yield in the reaction was 77.2%,
using a sample of river water sample analyzed for total inorganic carbon ,The river pH= 7.1 and an inorganic C concentration of 6.97 mg C/L.c
a 25.00mL sample of NaClO is titrated with 0.001005M HNO3. If 10.02mL of of HNO3 is required to reach the endpoint of titration, determine the concentration of ClO- in the original sample.
What mass of calcium can be produced by this process if a current of 5900 A is applied for 55 h? Assume that the electrolytic cell is 60 % efficient.
A star is estimated to have a mass of 1 multiplied by 1036 kg. Assuming it to be a sphere of average radius 6.5 multiplied by 105 km, calculate the average density of the star in units of grams per cubic centimeter.
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