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Explain while sodium metal comes into contact with water, hydrogen bubbles out of the solution presenting a potential fire hazard
2 Na(s) + 2 H2O ? 2 NaOH(aq) + H2(g)
Compute the mass of hydrogen gas produced by adding 20 g of sodium metal to excess water.
ethylene oxide polyol that has been generated from pentaerythritol with hexamethylene di-isocyanate, where the ratio of hydroxyl groups to isocyanate groups
Calculate the number of millimoles of HCl needed to reach the methyl orange end point. b. How many millimoles of Na2CO3 reacted with the HCl?
compound that would produce 4-ethyl-3-hexanol in the presence of a nickel catalyst and hydrogen
N and H undergo a combination reaction under appropriate conditions, to yield ammonia: N2 (g) +3H2 (g) →2NH3 (g), determine how much sample of N2 in grams requires 3.0 g of H2 for complete reaction.
When 33.4 mg of a compound is dissolved in 10.0 ml of water at 25 C the solution has an osmotic pressure of 558 torr. Calculate the molar mass of the compound.
What is the lewis structure and molecular shape around the carbons in CCl2CH2 as predicted by the VSEPR theory?
An aqueous solution containing 2.0M of AgNO3 is slowly added from a burette to an aqueous solution that holds 0.01M Cl- as well as .01M Br-. Is separation of the two ions by selective precipitation feasible? Assume 10^-5 M as the complete removal ..
Write a Lewis structure for each of the following. Part A {\rm Al} Draw the particle by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons and nonbonding electrons.
A molecule of N2 in air travels at about 1000 ft/sec. If the supersonic transport Concorde travels at 1500 miles/hour, how fast does it travel in ft/sec? (1 mile = 5280 ft)
Calculate the weight of KMnO 4 contained in 2 liters of a 0.15N (not M) solution.
What volume of 6.00 M sodium hydroxide in milliliters must be diluted to 209.0 mL to make a 1.50 M solution of sodium hydroxide
The pH of lemonade is approximately 3.0. How many times greater is the [H+] in coffee than in tap water having a pH of 8.0
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