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At 5K, the most stable form of the element Cs is body centered cubic with a=6.045amperes. What is the atomic radius of a Cs atom( either in pm or A) . State assumptions used
When 24 mL of a 175 mL stock solution containing 1.6 M BaF2 is diluted to 70 mL, what is the concentration of Ba2+ in the new solution?
If it is known that 41.6 grams of PURE ELEMENT THAT IS NOT DIATOMIC represents 1.30 moles of this element, what is the atomic mass of the element?
Calculate [CO32- ] in a 0.025 M solution of CO2 in water (H2CO3). If all the CO32- in this solution comes from the reaction shown below, what percentage of the H+ ions in the solution is a result of the dissociation of HCO3‾?
Calculate the density of N2 at STP, (a) using the ideal-gas law and (b) using the molar volume and molar mass of N2.
calculate the energy in joules and calories. required to heat 5.25g of water, from 55 C to 64.8 C
You have a 134.0g sample of CO2 at -230 oC. You heat it until you have gaseous CO2 at 312 oC. Calculate the total energy required for this process. You will need to find some additional information - heat capacities, phase changes, etc.
student takes 116. g of BaCl2, and reacts it according to the following equation: 3BaCl2 + Al2(SO4)3 → 3BaSO4 + 2AlCl3 How many moles of AlCl3 are formed?
Calculate the equilibrium constant for each of the reactions at 25 ° C .O 2 (g)+2H 2 O(l)+2Cu(s)→4OH - (aq)+2Cu 2+ (aq) Express your answer using one significant figure.
lots of space between gas particles B. little to no space between gas particles C. nothing about the space between gas particles can be inferred.
Calculate the amount of heat needed to boil benzene (C6H6), beginning from a temperature of 6.7 degrees celcius.
when perfoming a distillation some of the material will vaporize but will not collect in the reservoir of the Hickman head
the rate constant for the second order -reaction is 2NOBr(g)------>2NO(g)+Br2(g) is 48 L/mol*min at a certian temperture. How long will it take for 90.0% of a .0200M solution of NOBr to decompose.
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