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Calculate the concentration of an HCl solution given 37.36 mL of the solution reacted with 0.2714g of sodium carbonate (Na2CO3, MW=105.989)
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is the formula for chemistry Na3So4 correct? the 3 and 4 are supposed to be subscripts
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a cube of gold covered metal with a volume of 64 cm3 has a mass of 980 g. the density of pure gold is 19.3 g/cm3 is the metal pure gold?
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explain the steps required to produce a .5000 molal solution of copper sulfate?
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The gas with an initial volume of 24.0 L at the pressure of 565 mmhg is compressed until the volume is 16.0L. what is the final pressure of the gas, assuming the temperature does not change?.
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number of moles in Cl atoms in 3.01 1024 of magnesium chloride
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How much heat is required to warm 1.30 kg of sand from 22.0^\circ C to 100.0 ^\circ {\rm C}?
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Toxic cyanide ion, CN-, can be removed from wastewater by reacting it with hypochlorite, ClO-, in aqueous basic solution. The products formed are N2(g), bicarbonate, and chloride ion. What is the sum of the stoichiometric coefficients in the correctly balanced equation in basic solution?
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PF5,CS2,BBr3 and CO3 2, which obeys and do not obey octet rule??
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A solution of ethanol (C2H5OH) in water is prepared by dissolving 61.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 235.0 mL of solution. What is the molarity of the ethanol in this solution?
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Sample Questions
- 1. For organic chemistry, what is a concerted shift? How do things like acids or heat affect them? What other factors affect them?
- 2. Which of the following reactions is an acid-base neutralization reaction? Why are the rest of the answers incorrect?
- A. AgNo3 (aq) + NaI (aq) --> AgI (s) + NaNO3 (aq)
- B. S8(s) + 8O2 (g) --> 8SO2(g)
- C. Na3PO4 (s) + 2H2O (l) --> H2 (g) + 2NaOH (aq)
- D. Ca (OH)2 (aq) + 2HI (aq) --> CaI2(aq) + 2H2O (l)
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