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Determine the mass of substance C that will form when 45.0 grams of substance A reacts with 23.0 grams of substance B. (Assume that the reaction between A and B goes to completion.) Substance A is a gray solid that consists of an alkaline earth metal and carbon (37.5% by mass). It reacts with substance B to produce substances C and D. Forty million trillion formula units of A have a mass of 4.26 milligrams. 47.9 grams of substance B contain 5.36 grams of hydrogen and 42.5 grams of oxygen. When 10.0 grams of C is burned in excess oxygen, 33.8 grams of carbon dioxide and 6.92 grams of water are produced. A mass-spectrum of substance C shows a parent molecular ion with a mass-to-charge ratio of 26. (This means that the molar mass is some whole number multiple of 26 g/mole). Substance D is the hydroxide of the metal in substance A.
Calculate the pH of a 0.60 M H2SO3, solution that has the stepwise dissociation constants Ka1=1.5x10^-2 and Ka2= 6.3x10^-8
If the heat change for the decomposition of 25.0 g hydrogen peroxide is -72.2 kJ, what is the enthalpy of reaction for the process with respect to moles of hydrogen peroxide?
If 2.00 mol of argon is mixed with 3.00 mol of xenon and the total pressure of the system is 860 torr, what are the individual pressures. what would be the volume of this mixture at 18.0 psi and 18.5 C.
The heat capacity of the coffee cup (without the water) is 9.2 J/K. If the final temperature of the system is 31.1°C, what is the specific heat capacity of the alloy? (c of water is 4.184 J/g×K)
Calculate an unknown concentration of cobalt (II) nitrate if it and the original substance I was using both exhibit the color red? I'm pretty sure the answer is yes, but I want to double check.
Real gases deviate from ideal behavior because of the actual volume of gas molecules and ___________. a. Pressures within the chemical bonds b. Attractive forces between molecules c. That all molecules have different velocities d. Ionization energ..
Why is there a differance in the change in enthalpy and the change in internal engery for the zinc/hydrochloric acid reaction but not for the neutralization reactions
The solubility product of PbBr2 is 8.9x10^-6. Determine the molar solubility in 0.20M Pb(NO3)2 solution
Cesium-137 has a half-life of 30 years. You begin with a 20.0 g sample of Cs-137. How many half-lives occur if you wait a total of 60 years?
Using the value of 7.3 kcal/mole for ATP, how many kcal are conserved as ATP from one mole of glucose in each of the following
Determine the limiting reagent. (b) after the reaction has gone to completion, calculate the concentration of all species in the reaction
hawaiian macadamia nuts provide about 190 cal of energy usable from the digestion of these nuts per 1.0 oz serving. if
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