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Chromium crystallizes in a body-centered cubic lattice (the Cr atoms are at the lattice points only). If the density of the metal is 7.19 g/cm3, what is the unit cell edge length in pm?
The standard molar heat of fusion of ice is 6020 J/mol. Calculate q, w, and E for melting 1.00 mol of ice at 0C and 1.00 atm pressure.
Calculate the empirical formula for a chemical compound which gives the following analysis: 65.2 g scandium and 34.8 g oxygen.
What is the molarity of a solution formed by mixing 20.0 g sulfuric acid with enough water to make 500.0 mL of solution?
Sodium azide, NaN3 , is made for use in car 'air bags'. When this compound is heated to 300 degrees celsius, it rapidly decomposes into its elements.
Produce a buffer solution that has a pH of 5.32. You already have a solution that contains 10 \rm mmol (millimoles) of acetic acid. How many millimoles of acetate
The element boron has two naturally occurring isotopes with masses of 10.0129 amu and 11.0093 amu. What is the percent abundance of the second isotope?
During studies of the reaction below, 2 N2H4(l) + N2O4(l) ? 3 N2(g) + 4 H2O(g) a chemical engineer measured a less-than-expected yield of N2 and discovered that the following side reaction occurs
Determine the mass of CO_2 produced by burning enough carbon (in the form of charcoal) to produce 490 kJ of heat.
How much heat is absorbed when 45.00 g of C(s) reacts in the pressence of excess SO2(g) to produce CS2(l) and CO(g) according to the following chemical equation?
Assume that the specific heat and density of the resulting solution are equal to those of water [4.18 rm J/(g cdot {^circ C}) and 1.00 rm g/mL] and that no heat is lost to the calorimeter itself, nor to the surroundings.
How many moles of PCl_5 can be produced from 21.0 g of P_4 and excess Cl_2?
Hemoglobin is the protein that transports O2 through the blood from the lungs to the rest of the body. In doing so, each molecule of hemoglobin combines with four molecules
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