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cah2 + 2h2o --> 2h2 + ca(oh)2, how many grams of calcium hydride are needed to produce 1.0L of hydrogen gas, collected over water at 26 celsius and 760 torr total pressure.
What monatomic ions do iodine (Z = 53) and aluminum (Z = 13) form. Using the format [Cu]+ for Cu+ and [Cu]2+ for Cu2+.)
If the density of mercury is 13.6 g/mL. What is the mass in grams of 15.6 L of mercury?
A sample of oxygen is collected over water at 22 C and 752 mm Hg in a 125-mL flask. the vapor pressure of water at 22 C is 19.8 mm Hg. how many moles of dry gas are collected and how many moles of wet gas are in the flask
Assuming the mixture has the same specific heat (4.184J/goC) and density (1.00 g/cm3 or 1.00 g/mL) as water, calculate the heat (in J) transferred to the surroundings, qsurr.
A molecule has two amino/ammonium groups with pKas of 8.9 and 10.8, and a carboxyl group with a pKa of 4.1. A biochemist has 100 mL of a 0.1 M solution of this compound at a pH of 8.3. She adds 40 mL of 0.1 M HCl. What is the pH of the resulting s..
What information is gained from VSEPR analysis? What is Valence Bond Theory?
gallium arsenide is a common semiconductor. this material becomes a conductor when irradiated with infrared light whose
If the sample of the complex ion compound that you prepared had not thoroughly dried, but contained traces of water or ethanol would this make your value of x too high or too low? Or would it not affect your results at all? Explain.
How many liters of O2 (g) are needed to react completely with 56.0 L of CH4 (g) at STP to produce CO2 (g) and H2O (g)? Given CH4 + 2O2---->CO2 + H2O
A sample of 5.53g of Mg(OH02 is added to 25.0mL of 0.200 M HNO3. How many moles of Mg(OH)2, HNO3, and Mg(NO3)2 are present after the reaction
Calculate the mass defect of the helium nucleus 4/2He. The mass of neutral 4/2He is given by Mhe= 4.002603u. Calculate the binding energy of Eb the helium nucleus 4/2He Calculate the binding energy per nucleon of the helium nucleus 4/2He
The drug is eliminated metabolically by a first-order process having a rate constant of 5.39 × 10-3 min-1. What must the initial dose of the drug be in order for the drug concentration 2.39 hours afterward to be 4.5 mg/kg body weight
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