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Question: The compound MgI2 times XH2O is analyzed to determine the value of X. A 1.557-g sample of the compound is heated to remove all the water, 1.0254 g of MgI2 remains after heating. What is the value of X?
When chromium crystallizes, it forms body-centered cubic cells. The unit cell edge length is 288.7 pm. Calculate the density of chromium
30.82g of nitrogen will react with 17.60g,35.20g,70.40g or 88.00g oxygen to form four different compounds. calculate the mass of oxygen per gram of nitrogen in each compound
A 6.55mg/L solution of benzoic acid has an absorbance value of 0.621 at 230 nm in a 1.00cm cell. in units of M^-1*cm^-1, what is the molar absorptivity of benzoic acid at 230nm?
An organofluorine compound has a density of 0.773 g/L at 18.5 C and 223 mm Hg pressure. calculate the molar mass of the compound
what is the ph of a buffer solution prepared from equal volumes of .25 m sol of a weak acid and .025 m sol of the salt of that weak acid. the acid has a pka of 4.82
Write a Lewis structure for each of the following. Part A {\rm Al} Draw the particle by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons and nonbonding electrons.
What is the pH of the solution halfway to the equivalence point. What is the pH of the solution at the equivalence point
A chemical reaction at equilibrium is heated, briefly, by holding it over a flame. The equilibrium is seen to shift toward the products. What can be said about the enthalpy and entropy of the reaction
0 .15m h2CO3 and 0.80 m of NaHCO3 are dissolved what is the ph of resulting solution
How would you know which is the most polarizable and how would you order the boiling points from lowest to highest?
draw out the complete coordination environment of each zinc ion in liver alcohol dehydrogenase ladh including all
hydrocyanic acid hydrolyzes in water according to the reactionhcnaq 2 h2o rarr nh4co2the rate constant for this
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