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The nutritional calorie is equivalent to 1 kcal. One pound of body fat is equivalent to about 4.1 x 103 Calories.
If a runner expends 1850 kJ/h, explain how long does she have to run to work off 3.55 lb of body fat?
If 3.70 mol of ethane, C2H6, undergo combustion according to the unbalanced equation given below, how many moles of oxygen are required? C2H6 + O2-> CO2 + H2O
The reading on the tank pressure initially rises very quickly then much more slowly eventually reaching a value of 3.27 mpa. A ssume T final=19C. How many moles of air in the tank initially ?
28.98 mL of a 0.1962 mol/L EDTA solution is required to titrate a sample to the equivalence point. How many moles of divalent metal cations were in your sample?
a sample of cadmium with mass 2.248g is dissolved in 3.00M HCl. What volume of HCl is required to dissolve the Cd. (Cd dissolves in HCl to form Cd^2+)
25.0 mL of 1.00 M HCl at 24.3oC react with 25.0 mL 1.00 M NaOH in a styrofoam calorimeter whose calorimeter constant is 70 J/C. The final temperature is 31.8o C. Assume the density of the solution product is 1.00 g/mL and the specific heat of the ..
1 a 0.464g sample of compound containing the elements carbon hydrogen oxygen and sulphur was burned completely yielding
Complete molecular equations, net ionic equations of Ba(OH)2+Nicl2, Nacl+AgN03, (NH4)2CO3+cacl2, Nicl2+NaOH
some liquids have high enthalpies of vaporization while others have relatively low values. explain this fact in terms
A woman had a heart attack caused by thrombus. the cells immediately downstream from the thrombus were deprived of oxygen and , as a result, increased
what is the concentration of (HOCl), at equilibrium if 0.0230 mol of H2 and 0.0230 mol of ClO2 are initially placed in a 5 L vessel? What is the concentration of ClO2 in the above problem at equilibrium?
Using concentrated acetic acid and solid sodium acetate, how would you prepare 10 l of 0.1 M acetate buffer at pH 4.75? The pKa for acetic acid is 4.75. What Volume of concentrated acetic acid is needed (mL)?
one of the most famous of the obsolete theories of the hydrogenatom was proposed by bohr. it has been replaced by
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