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Barium metal crystallizes in a body centered cubic lattice. the unit cell edge length is 502 pm and the density of the metal is 3.50g/cm3. using the information, calculate the avogadros number. assume 68% of the unit cell is occupied.
Give an acceptable name and identify the functional group; and
You are given the chemical reaction: 4AsF3 + 3C2Cl6 -> 4AsCl3 + 3C2Cl2F4.If 1.3618 moles of AsF3 are allowed to react with 1.000 mole of C2Cl6.
A 4.40 g nugget of pure gold absorbed 295 J of heat. The initial temperature was 21.0°C. What was the final temperature?
What is the heat change in J associated with 65 g of gaseous acetic acid at 127 oC changing to solid at -50 oC? c(acetic acid) (g) = 1.11 J/(g.K) c(acetic acid) (liq) = 2.18 J/(g.K) c(acetic acid) (s) = 1.32 J/ (g.K) ?Hfus(acetic acid) = 192 J/g ?..
Rubidium has two naturally occurring isotopes with the following masses and natural abundances, Calculate the atomic weight of rubidium.
How many grams of CaH2 (Molar Mass = 42.1 g/mol)are needed to generate 16.0 L of H2 gas if the pressure of H2 is 729 torr at 21.0°C?
When diluting the juice samples with water, you did not need to be as accurate as in previous measurements. Why was the same level of precision not required?
Heating any of the three isomeric dimethylbenzenes with HF in the presence of BF3 to 80 C leads to the equilibrium mixture shown below: 1,2-Dimethylbenzene: 18% , 1,3-Dimethylbenzene: 58% , 1,4-Dimethylbenzene: 24%
Kinetic Molecular Theory states that particle collisions are elastic,but energy and collisions of the particles are proportional to the absolute temperature, but the more collisions according to Henry's law, the more gas dissolves.
A 750-mL sample of nitrogen was collected by displacement of water from a container at 30°C and an atmospheric pressure of 742 Torr. If the vapor pressure of water at 30°C is 31.8 Torr, calculate the number of moles of nitrogen gas produced.
what is the molarity of a solution made when you dilute 35 grams of sodium carbonate to a volume of 3400 ml?
If 3.93 g of sodium borohydride contains 2.5 × 10^23 H atoms, how many moles of H are present in 36 cm^3 of sodium borohydride (of density 1.074 g/cm^3)? Answer in units of mol
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