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Question- An ionic compound forms when calcium (Z = 20) reacts with iodine (Z = 53). If a sample of the compound contains 1.3X 10^19 calcium ions, how many iodide ions does it contain?
I am stuck in between this question please help me out
an unseeded bod test is conducted on a polluted surface water sample by adding 100 ml of the sample to a 300-ml bod
1. an empty drum weighs 1.035 kg and when filled with benzene it weighs 5.418kg.nbspnbsp if the density of benzene is
Poly(propylene) is made of one kind of monomer. Give the two monomers used to make nylon 6,6. Why are two monomers needed to make nylon 6,6 while only one is needed to make poly(propylene)?
Calculate the pH of a buffer solution made by mixing 49 ml of a 0.07 M ammonia solution with 52 ml of a 0.10 M ammonium nitrate solution. Give the pH to two decimal places.
A mixture of nitrogen and hydrogen was allowed to come to equilibrium at a given temperature according to 3H2+N2 2NH3. At equilibrium, the mixture contained
HBr is mixed with water. Which is the best description of what you would expect to find in the solution
Describe the preparation of 125 mL of 5.30 M HNO3 from a concentrated solution that has a specific gravity 1.42 and is 70% (w/w) HNO3.
Finding out amt of sugar in sodas. If the soda unknown was set out thus the carbonation is lost. What would have been the effect of deter. Of densities if this hadn't been done? Would it affect accuracy or precision of density measured? Is it syst..
If the specific heat of the ball bearing is .474 J/g times degress C, calculate the final temperature of the water. Assume the calorimeter to have neglible heat capacity.
Problem- Calculate the standard free energy changes for the decomposition of solid magnesium oxide into solid magnesium and oxygen gas.
what is the concentration ratio of the free (and potentially toxic) Pb^2+ (aq) in the blood to the much less toxic Pb^2+ -EDTA complex
Magnesium carbonate, MgCO3, has a Ksp value of 6.80×10?6 . What happens when magnesium and carbonate solutions are mixed to give 2.50×10?3M Mg2+ and 2.00×10?3M CO3 2-?
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