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Consider the following unbalanced reaction.P4(s) + F2(g) PF3(g)What mass of F2 is needed to produce 167 g of PF3 if the reaction has a 77.0% yield?
How much energy would be required to melt 74 g of HCl at its melting point of -110.8 ? C? ?Hfus for HCl is 14.2 cal/g and ?Hvap for HCl is 98.7 cal/g. Answer in units of cal.
The catalytic converter on your automobile contains small amounts of a precious metal catalyst. Which of the following components would you expect to be decreased in your tailpipe emissions.
The equilibrium concentration of HA will be less than the stoichiometric concentration because some or all of HA ionizes.
A solution is prepared by mixing 250 mL of 1.00 M CH3COOH with 500 mL of 1.00 M NaCH3COO.
Consider a molecule with spacing between two energy levels of 0.250 kJ mol-1. Calculate the wavelength and wavenumber of the photon that would be needed to lead to an excitation between these two levels.
Compute the thermal-equilibrium values of hole and electron concentrations while Considering a homogeneous gallium arsenide semiconductor at the given temperature of T = 300 K with Nd = 1016 cm-3 and Na = 0?
The water level in a graduated cylinder initially at 220 rises to 279 after a piece of lead is submerged. What is the mass in grams of the lead.
Find the volume of oxygen - What volume of oxygen is needed to completely combust 2.07 L of methane gas
Estimate the thickness of the lipid bilayer in a biological membrane - Estimating the thickness of a membrane by using bond distance.
Determining System Equilibrium, A one-litre cylinder at 458'C is found to contain 0.36 moles of HI (g), 0.15 moles of I 2(g), and 0.18 moles of H2(g). Is this system at equilibrium?
Salicylic acid, used in the synthesis of aspirin, has mass composition 60.87% C, 4.38% H, and 34.75% O. What is the empirical formula of the compound.
Consider the following equibrium: CO(g) + 3H2(g) = CH4(g) + H2(g) Initially, 0.200 mol CO and 0.600 mol H2 are placed in a 2.00 L container.
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