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Calculate the radius of iridium (Ir) atom given that Ir has FCC crystal structure, a density of 22.4 g/cm³ and atomic weight of 192.2 g/mol
1.248-g sample of limestone rock is pulverized and then treated with 30.00 mL of 1.035 M HCl solution. the excess acid then requires 11.56 mL of 1.010 M NaOH for neutralization.
Subtract one from the other. In what direction do the functions point? What orbitals are "left" unused on the C atom?
The normal boiling and freezing points of substance X are 87.3 K and 84.0 K respectively. The triple point is at 82.7 K and 0.68 atmosphere. a. Draw a phase diagram for substance X. Label the regions in which the s,l, and g phases are stable.
For the equilibrium H2(g)+ CO2 (g) H20 (g) + CO(g) Kc = 3.18 at 1106K. If each of the four species was initially present at a concentration of 3.000M, calculate the equilibrium concentration of the CO(g) at this temperature
Gaseous HBr has an absorption band centered at about 2645 cm-1 consisting of a series of lines approximately equally spaced with an interval of 16.9cm-1.
how many grams of vinegar are required to react completely with 25.0g of baking soda.
What mass of methane, CH4, is contained in a 500.-mL sample of CH4 at STP?
The molar heat capacity of silver is 25.35 J/mol * C. How much energy would it take to raise the temperature of 8.60 g of silver by 11.1 C?
Graphite is the crystalline form of carbon used in lead pencils. How many moles of carbon are there in 305 mg of graphite? (b) Manganese (Mn) is a transition element essential for the growth of bones.
Determine the partial pressure of each gas in a mixture of gases using Dalton's law of partial pressures
Calculate: a. kg of pressed beans from stage 1 b. kg of extracted meal from stage 2 c. kg of final meal & wt% protein of it ans: 8723 kg, 8241 kg, & 7816 kg and 44.8 wt% protein.
A zero-order reaction has a constant rate of 3.20×10-4 . If after 60.0 seconds the concentration has dropped to 6.50×10-2 , what was the initial concentration?
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