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A balloon is filled with 4230 L of hydrogen gas (H2), which is highly flammable. What is the mass of this gas at STP? Show work
M =D×VM=0.0899g/L×4230LM=380.28g
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A nitrox to gas mixture for scuba diving contains oxygen gas at 50 ATM and nitrogen gas at 90 6:00 a.m. what is the total pressure in ATM of the scuba gas mixture
Dalton's law states; The total pressure exerted by a mixture of gases is equal to the sum of the pressures of each of the different gases making up the mixture,...
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Impure solid product of chemical reactions can be best purified by
Crystallization is used in the chemistry laboratory as a purification technique for solids. An impure solid is completely dissolved in a minimal amount of hot, boiling solvent, and the hot...
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Three isotopes of oxygen are oxygen-16, oxygen-17, and oxygen-18. Write the symbol for each, including the atomic number and mas number.
8O16, 8O17, 8O18
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Calculate the weight of a sample of impure oxalic acid that should be taken for titration by 0.5000 N NaOH so that the percentage of H2C2O4.2H2O will be twice the buret reading?
Molar Mass of NaOH = 39.997= 0.5 × 39.997= 19.999= 19.999+60 = 79.999Molar Mass of H2C2O4.2H2O = 126.07= 126.07/79.999= 1.576g
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A student was assigned to recrystallize an impure sample of benzoic acid. he obtained 3.2g of pure benzoic acid from 5g of the sample. calculate the % yield of recrystallized (pure) benzoic acid.
Solution:% yield = (mass of pure benzoic acid) / (mass of starting benzoic acid)% yield of recrystallized (pure) benzoic acid = (3.2 g) / (5.0 g) = 0.64 or 64%Answer:...
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A 2.83 L container of oxygen gas at 25.2 °C is heated to 46.8 °C. Assuming that the volume of the container can vary, what is the new volume of the gas
V2 = 3.035 L
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determine the total volume of gas produced at stp when 1g of silver nitrate is heated.
2 AgNO3(l) → 2 Ag(s) + O2(g) + 2 NO2(g).340 - 67.2 1 - x.X= 0,197647059 L = 197,647059 ml.
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How many molecules of oxygen gas are present in a 0.343 g sample of oxygen gas? work included
To get molecule we need to find mole first Mole=mass/ molar massMole=0.343/16=0.021Mole=number of molecules/avogadro's constant Molecules=mole x avogadro's constant =0.021×6.02×10^23=1.26×10^22 molecules
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<ol><li>If a 25.0 L sample of gas at 0C is heated to 35 0C, what is the new sample of the gas at constant pressure?</li></ol>
AccordingtogaslawV1/T1=V2/T2V2=V1∗T2/T1=25∗298/273=27.3l
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