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How many grams of sodium hydroxide are needed to react completely with 50.1 mL of 0.145 MCoCl2 solution?
The net ionic equation for the reaction isCo2+(aq) + 2OH-(aq) → Co(OH)2(s)
what is the concentration of oygen dissolved in water at 20 degrees celsuis in equilibrium with a gas mixture at 0.81 atm.
The element lithium has two naturally occurring isotopes, 7Li (isotopic mass 7.0160 amu, abundance 92.5 %) and 6Li (isotopic mass 6.0151 amu, abundance 7.50 %). Calculate the atomic mass of lithium.
Could you share with us whether any of these risks were specifically applicable to an infrastructure project (or any other project) you were involved with?
At which rate will there be an excess supply of money? What does this mean? Describe in detail the adjustment process in the money market when there is an excess demand for money.
Which formula represents the greatest number of isomers?
What weight of A would be removed by four successive extractions with 25-mL portions of ligroin? How much ligroin would be required to remove 98.5% of A in a single extraction?
Describe the average weight gain of an infant during the first year of life. How do the size and proportions of an infant's body change during the first 2 years? Child psychology and this question is based on the book, "Developing Person Thru Childh..
The U.S. is in recession and, at last report, GDP was shrinking at a rate of 1% per year. The unemployment rate is rising and now stands at 7%. In recent months, the rate of inflation has been holding steady and is increasing at an annual rate ..
Do you love Classic Disney? Do you ov Pixar and DreamWorks digital animation? Do you love one type more than another? Why? What stands out about one that the other can't capture?
A 68.0 mL solution of 0.500 M Cd(NO3)2 is prepared. What mass of NaOH is needed to precipitate the Cd2+ ions from this solution?
The decomposition of 3.32 g CaCO3 yields 1.24 g CaO. What is the percent yield of this reaction? CaCO3(s) -> CaO(s) + CO2(g)
The mass of a cube of iron is 379 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
A.E. Dyer supplied 45.9 cal of heat energy to a 156-g piece of aluminum block that was kept at 28 degree C. What is the final temperature of the aluminum block?
The mass of the Earth's Moon is 7.35 x 10^22 kg. what is the mass expressed in megagrams , Mg?
How many moles of sulfur dioxide, SO2 are contained in a 5.0 L container at STP?
Complete and balance the equation for this reaction in basic solution. Phases are optional.
A 25.72 mL sample of a 0.200 M solution of barium nitrate is mixed with 11.19 mL of a 0.250 M solution of potassium sulfate. Assuming that all ionic species are completely dissociated
.134 mol of KCl and .257 mol of CaCl2 were dissolved in water. calculate the total number of moles of Cl- ions in the solution
how many grams of C6H12O6 must be added to 250g of water to lower the vapor pressure by 1.30mm Hg at 40C degrees? the vapor pressure of water at 40C degrees is 55.3mm Hg.
If 23mL of 6.4M H2SO4 was spilled, what is the minimum mass of NaHCO3 that must be added to the spill to neutralize the acid.
how much of heat is gained by nickel when 500 g of nickel is warmed from 22.4 to 58.4C?
The dried precipitate weighs 10.3g. Calculate the amunt of MgCl2 in the original sample (in weight percent).
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