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what is the total number of grams of patassium chloride needed to saturate exactlye 300 grams of water at 10 degrees celcius?
What volume of O2 gas (in L), measured at 782 mmHg and 25C is required to completely react with 53.2 g Al
specific brand of gourmet chocolate candy contains 7.00 rm g of dietary fat in each 22.7-rm g piece. How many kilograms of dietary fat are in a box containing 4.00 lb of candy?
Describe the preparation of 1L solution of 0.02M Tris buffer, PH 7.8. 3. What volume of glacial acetic acid (d= 1.06g/ml) and what weight of solid potassium acetate are required to prepare 5 liters of 0.2M acetate buffer,PH 5.0?
A gas evolved during the fermentation of sugar was collected at 22.5 c and 702 mmhg. After purification it's volume was found to be 25.0 l . How many moles of gas were collected.
What must the minimum temperature of its energy source be if it is to produce work with an efficiency of 0.75?
Calculate the voltage of the cell 2Ag+(aq) (0.200 M) + Cu(s) Cu2+(aq) (0.080 M) + 2Ag(s) Eocell = 0.460 V
In 13C NMR, splitting of spectral lines is due to: A) coupling between a carbon atom and protons attached to that carbon atom b) coupling between a carbon atom and protons attached to adjacent carbon atoms
What mass of solid citric acid (g) and how many milliliters of 0.500 M NaOH are needed to produce 100.0 mL of a buffer with a pH of 6.50 and a weak base concentration of 0.0250 M
A gaseous mixture of O2 and N2 contains 40.8% nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 405mmhg
how many grams of NO are required to produce 145 g of N2 in the following reaction? 4NH3+6NO-- 5N2+6H2O
Trimyristin can be synthesized from glycerol and tetradecanoic acid in 87% yield. If 25.00 g of trimyristin is needed, what amount of both starting materials (in grams) would need to be used in order to provide the needed amount of trimystin?
calculate the energy absorbed when 2.67 moles of ethyl ether undergo combustion: CH3CH2OCH2CH3(l) + 6O2(g)-> 4CO2(g)+5H2O(l) delta H=+1604 kJ/mol
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