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You have dissolved 0.298 g of soda ash into 80 mL of deionized water. It took 19.8 mL of 0.0998 M HCl to titrate the solution to the second equivalence point. What is the percent Na2CO3 in the soda ash?
How many grams of dry NH4Cl need to be added to 2.10L of a 0.500 M solution of ammonia, , to prepare a buffer solution that has a of 8.84? Kb for ammonia is 1.8*10^-5.
Consider the following reaction: NH4HS(s) NH3(g) + H2S(g) An equilibrium mixture of this reaction at a certain temperature was found to have [NH3]=.278M and [H2S]=.355M.
what products may have been formed during the combustion of the gas?
Phosphorus-32 has a half-life of 14.0 days. Starting with 8.00 g of Phosphorus-32 , how many grams of P-32 will remain after 98.0 days?
If 1.26 L of H2 gas are formed at STP, how many gram of HCl reacted? The reaction is Zn(s) + 2HCl(aq) ( H2(g) + ZnCl2 (aq)
With what minimum speed must Fran leave the ground in order to lift her center of mass 1.95 m and cross the bar with a speed of 0.70 m/s?
In Organic lab we are enabling trans to cis isomerizaton of E-1,2-dibenzoylethylene by irradiating the alkene with UV light. What is the overall equation for this reaction
A 0.250 mol sample of argon gas has a volume of 9.00 L at a pressure of 875 mm Hg. What is the temperature (in celsius) of the gas?
How to convert the moles of KHP to moles of NaOH, using the equation HKC8H4O4 + NaOH = NaKC8H4O4 + H2O. If the moles of KHP are .002506 mol.
what is the number of valence electrons for nh4+ and what is the lewis structure for that molecule. and how many remaining electrons are there and how do you find the formal charge.
If the reaction 2 NO(g) + O2(g) ? 2 NO2(g) is carried out at STP, what is the total pressure? What is the temperature at STP
the average adult has about 16 g of sodium ions in her blood. assuminga total blood volume of 5.0 L, what is the molarity of Na+ ions in blood?
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