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To get hold of 8.0g of potassium dichromate from a solution labeled 5.0% by mass, explain how many grams of solution are needed?
the value of the molar absorptivity is 4.84*10^3 M^-1 cm^-1 for K2CrO4 at that wavelength. what is the concentration of the solution
how many moles of carbon dioxide will be formed upon the complete reaction of 0.793 moles carbon monoxide with excess water?
cortisol m 362.47 gmol one of the major steroid hormones is a key factor in the synthesis of protein. its profound
what is hte mass in mgs of solute in 737 mL of a solution that contains 6.38 ppm of Pb(NO3)2 and please explain work
consider the combustion of ethane2c2h6 7o2 yields 4co2 6h2oif the ethane is burning at the rate of 0.1 molls at what
Compute the de Broglie wavelength of an electron accelerated from rest through a potential difference of (a) 100 V, (b) 1.0 kV, (c) 100 kV
A high protein diet contains 78 g of carb, 150 g of protein, and 6.8 g of fat. How many kilojoules does this diet provide
q. determine the mass in gms for pure ag sample that loses 2.88kj if its temperature drops from 143 degree celsius to
The radioactive Co-60 isotope is used in nuclear medicine to treat certain types of cancer. Calculate the wavelength and frequency of an emitted gamma particle having the energy of 1.29 x 10^11 J.
How much heat (in kJ) is needed to convert 853 g of ice at -30.°C to steam at 131°C? (The specific heat capacities of ice, steam, and liquid are 2.03 J g-1 °C-1, 1.99 J g-1 °C-1, and 4.18 J g-1 °C-1, respectively. The heat of fusion is 6.02 kJ mol..
acetic acid has a Ka of 1.8x10^-5. what is the pH of a buffer solution containing .15 M CH3COOH(acetic acid) and .15 M CH3COO^-?
A 4.305-gram sample of a nonelectrolyte is dissolved in 105 grams of water. The solution freezes at -1.23°C. Calculate the molecular weight of the solute. Kf for water = 1.86°C/m.
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