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A sample of CaCO3 and MgCO3 weighed 2.21 g is ignited to constant weight of 1.152 g . what is the composition of mixture ? also calculate the volume of CO2 evolved at 0 oc and 76 cm of pressure .
Explain if you dilute 28.0mL of the stock solution to a final volume of 0.600L, Explain what will be the concentration of the diluted solution
consider c7h16 l 11 o2 g rarr 7 co2 g 8 h2o l deltahreaction- 4130 kj. how much energy is released when 4.000 moles
Density is an easy way to distinguish between gold (density: approx. 19 g/cm3), fool's gold (density: approx. 4.5 g/cm3), and sand (density: approx. 2.5 g/cm3). If a large golden rock has a mass of 252 g and a volume of 56 cm3, which type of miner..
benzylamine was titrated with 0.050 0 M HCl. Calculate the pH at the following volumes of added acid: Va = 0, 12.0, 30.0, 0.5 Ve, Ve, and 35.0 mL.
A 295 mL stock solution contains 2.3 M Ca(CN)2. When 100 mL of the stock solution is diluted to 120 mL, how many moles of CN- ions will be contained in the dilute solution?
Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.110 M HClO(aq) with 0.110 M KOH(aq). The ionization constant for HClO is 4.0*10-8.
If the total volume of the jewelry is the sum of the volumes of the gold and silver that it contains, calculate the percentage of gold (by mass) in the jewelry.
Even if a cospotted TLC analysis of an unknown with an authentic standard is performed, one still does not know with complete certainty that the unknown and the standard are identical.
Question- An electrochemical reduction of 10.0mL of 1.235 M copper (II) sulfate to form copper metal is carried out a cathode in constant current coulometry. The constant current is 0.2497 A (Amperes).
If human height were quantized in one-foot increments, what would happen to the height of a child as she grows up
calculate the apparent degree of dissociation of the nh4cl if the freezing point of this solution is -15.3oc?molal
The mass spectrum of an organic compound shows the relative abundances of M to be 85.12% and M+1 to be 0.9206%. Assuming the peaks are caused by C-12 and C-13 isotopes
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