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When spheres of radius r are packed in a body-centered cubic arrangement, they occupy 68.0% of the available volume. Calculate the value of a, the length of the edge of the cube in terms of r.
Please explain the calculation.
The EPA has determined that permissible free cyanide levels are 0.20ppm. What mass of cyanide would this be in a 65kg person?
A 2L cylinder of gas contains 2.4 moles of gas at 34 degrees Celsius. What is the pressure?
The combined gas law requires that only the amount of gas be held constant. if P2 is unknown and needs to be computed, then the expression to be use is a) P2=P1V1T1/V2T2 b) P2=P1V2T2/V1T1
A mixture of 82.0 g of magnesium (24.31 g/mol) and 350 g of iron(III) chloride (162.2 g/mol) is allowed to react. What mass of magnesium chloride (95.21 g/mol) can be formed?
Which of the following is an experimental fact that valence bond theory cannot explain, but molecular orbital theory can? the paramagnetism observed for O2 the N-N bond order in N2 the rotational barrier about the C-C bond in ethylene the existenc..
The process of water freezing to form ice at 0 degrees C is a. neither exothermic nor endothermic. b. an endothermic phase change. c. an exothermic chemical reaction. d. an exothermic phase change. e. an endothermic chemical reaction.
Organic hydrogenation reactions, in which H2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries.
Question- A .2817 sample of KHP (MW 204.22 g/mol) required 19.68 mL of NaOh to reach with the phenolphthalein end point. Calculate the molarity of the NaOH solution
Show a reaction producing an alcohol (a compound containing an -OH group) -- this is again an addition reaction with an alkene and the appropriate reagent -- from the same list of reagents for addition reactions with alkenes.
What is the heat energy change for this in kcal. Specific heat of h2o 1.00cal/gC. How many mols of cacl2 is this. How much heat energy per mol. answer in kilocalories
Based on the data for step 2 of the experiment, predict what would happen if you performed step 3 of the experiment (how many sets of three drops of each of the HCl and NaOH would be needed until the buffering capacity is lost for the two solution..
Draw every stereoisomer for 1,2-difluoro-1,2-dimethylcyclopentane. Use wedge-and-dash bonds for the substituent groups, and be sure that they are drawn on the outside of the ring,
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