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lead-204 203.973amu, 1.40% abundance. lead-206 205.974 amu, 24.10% abundance. lead-207???, abundance 22.10%. lead-208 207.977, abundance 52.40%. Calculate the isotope mass of lead-207
=207.2 amu (Pb)
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How many atoms are in a body-centered cube, assuming that all atoms occupy
lattice points�
The body-centered cube contains 2 atoms. This type of unit cell consists of one central atom and eight 1/8 atoms in each corner of the unit cell. This adds up to...
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Explain why an atom in the 4th period is larger than the 3rd period.
An atom in the third period has three electronic shells which are more closer to the nucleus than the four electronic shells in an atom in fourth period. The force...
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A body of density 9.0 grams per centimeter cube(g/cm3) appears to have a mass of 27.0 grams in a liquid of density 1.2 grams per centimeter cube(g/cm3), what is the volume of the solid?
ρ=m/V V=m/ρ V(solid)=27.0/9.0=3 cm3
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cube of osmium metal has 1.500 cm on a side and has a mass of 0.07631 Kg at 25°C. Calculate the density of the cube.
Solution:Volume of cube with side lenghts 's':V = s × s × s = s3s = 1.500 cmTherefore,V = (1.500 cm)3 = 3.375 cm3Density = Mass / VolumeMass = (0.07631...
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An alloy of mass 588g and volume 100cm3 is made of iron of density 8.0g/cm3 and aluminium of density 2.7g/cm3. Calculate the proportion (i) by volume, (ii) by mass of constituents of the alloy
1 cm3 of alloy would weigh 588/100 = 5.88 g1 cm3 of iron would weigh = 8.0 g1 cm3 of aluminum would weigh = 2.7 gLet proportion of iron be...
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The density of chromium metal is 7.14 g/cm3. A cube of chromium has a mass of 32.00 kilograms. Calculate the length of each side of the cube in inches.
1 inch = 2.54 cm exactly.
p=m/V V=m/p = 32000 / 7.14 = 4481.79272 cm3V= a3 a= V^(1/3)= 4481.79272^(1/3) = 16.4873398 cm
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lead (II) sulfide has a composition of 86.6% lead and 13.4% sulfur . if 10.5 g of lead reacts to form lead (II) sulfide . What mass of sulfur reacts?
86.6/201:13.4/32=1:1.PbS.Pb+S=PbS.(10.5/201) x 32= 1.67164179 g of S
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25.00cm of 0.100M NaOH is needed to titrate 25.00cm of a solution of hydrochloric acid. Calculate the concentration of the acid.
NaOH + HCl → NaCl + H2OThe mole ratio NaOH:HCl is 1:1Amount of sodium hydroxide = 0.100 (mol/L) × 0.025 L = 0.0025 molTherefore 0.0025 mol of NaOH reacts with...
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What is the mass of a cube of iron that has a volume of 13.5 centimeter³, if the density of iron is 7.87 grams/centimeter³?
iron cube that has a volume, V = 13.5 centimeter³The density of iron is, D = 7.87 grams/centimeter³We know, density, D =( M/V ) Or, M = D×V Puttingthe given...
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