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In the reaction of Fe3O4 with carbon to form carbon dioxide and iron, the number of moles of carbon required to convert 23 g of Fe3O4 to products is
A. 0.05
B. 0.1
C. 0.2
D. 0.3
E. 0.4
It is possible to draw a valid Lewis structure that follows the octet rule for all of the following except one. Which one cannot be drawn without violating the octet rule
Which is the best acid to use in the preparation of a buffer with pH = 9.3?
A swan can float on a lake with only 33% of its volume below the surface. What is the average density of the swan
Cl revealed that it contains 33.33% C atoms by number and has a molar mass of 248.75 g/mol. What is the molecular formula of this compound?
how would you make a 500 ml solution that is 10mM Tris, 2mM EDTA. The formula of Tris is 121.1, EDTA's FW is 187
Write the equation for the esterification reaction between ethanol and acetic acid (ethanoic acid), Write the equation for the esterification reaction between ethanol and acetic anhydride(ethanoic acid anhydride)
Suppose one wated to take another approach where C is heated until 5% of the atoms occupy the electronically excited state. Consedering only the lowest-energy ground state and the elctronically excited state
What is the final temperature of the water when equilibrium is reached? (Assume a density of 0.998 (g/mL) for water.)
The equilibrium system H2 + I2 ? 2HI has equilibrium constant K = 6.2. Starting from the nonequilibrium state [H2] = 0.3 M, [I2] = 0.5 M, and [HI] = 0.7 M, what are the concentrations of the three molecules when equilibrium is established
Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons. Show the formal charges of all atoms in the correct structure of ClO4-
What is the pressure exerted by a mixture of gases in a 50.0 L container at 142°C if the mixture contains 0.100 mol O2, 0.500 mol CH4, and 0.900 mol SO2?
A gaseous mixture of O2 and N2 contains 40.8 % nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 625 mmHg ? Express you answer numerically in millimeters of mercury.
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