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At 22 °C an excess amount of a generic metal hydroxide M(OH)2, is mixed with pure water. The resulting equilibrium solution has a pH of 10.28. What is the Ksp of the salt at 22 °C?
What mass of this substance must evaporate in order to freeze 160 g of water initially at 21 0C? (The heat of fusion of water is 334 {J/g}; the specific heat of water is 4.18 {J/g c.K}.)
a 19.3 g mixture containing sodium sulfide and calcium chloride. 86.9% sodium sulfide and 63.9% by mass chlorine. what is the grams of chlorine?
Calculate the mass of ascobic acid in the whole tablet( use mass of whole tablet) c) Calculate the %error in the mass of ascobic acid in one whole tablet
a 6.0-g sample of [Ni(H2O)6]Cl2 is dissolved in aqueous solution. If an excess of ethylenediamine (en) is added to the solution, solid [Ni(en)3]Cl2*2H2O forms. What is the theoretical yield of product from the reaction?
If a solution is made by mixing 20.0 mL 0.3 M NaCH3COO with 30 mL 0.4 M CH3COOH, calculate the pH of the solution? For acetic acid, K = 1.76 x 10-5.
Sodium reacts with flourine to produce sodium flouride. If 4.0 grams of sodium reacts with 5.0 grams of flourine, how much NaF can be produced?
how many square meters of floor space are there in a room which has 225.0 square yard of floor space 1 m=39.37 in, 1 yard =36 in.
Calculate the hydronium ion concentration and the pH when 25.0 mL of 0.50 M NH3 is mixed with 65.0 mL of 0.19 M HCl.
A 26.0-g sample of ice at -10.0°C is mixed with 114.0 g of water at 72.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
the decomposition of N2O5 in carbon tetrachloride proceeds as follows: 2 N2O5 -> 4 NO2 + O2. The rate law is first order in N2O5. At 64 degree celcius the rate constant is 4.82 x 10^ 3 s ^ -1.
A .10M solution of the weak acid HCN has an equilibrium constant of 4.9 X 10^-10. Calculate the percent dissociation of the acid
Draw the major and minor resonance structure for the carbonate ion (CO3^-2). Include any formal charges, Indicate which are the major resonance structures and why.
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