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The concentration of Al and Na in a sample of riverwater are 0.050 mg/kg and 5.2 mg/kg respectively. Express concentrations in molality of both Al and Na
How many grams of aluminum oxide are produced when 50.3g aluminum react, When 0.510 mole aluminum is reacted in a closed container with 7.90g oxygen, how many grams of aluminum oxide can form?
If 18.4mL of 0.800M solution are needed to neutralize 5.00mL of a household ammonia solution, what is the molar concentration of the ammonia?
53.8 percent nitrogen. At 25oC and 750 mm Hg, 1.05 g of this gas occupies a volume of 0.500 L. What is the molecular formula of the gas?
what is the final temperature of 100 g of water, initially at 20 Celsius , to which 1000 calories (cal) are added
what antibiotic woiuld you put in an agar plate to ensure that the cells of a bacterial colony contain the plasmid withou an insert? c) which phenotype will indicate the presence of plasmids that contain human DNA fragments?
How does the law of definite proportions help to distinguish between a compound of certain elements
what is the percent yield of a reaction in which 212 g phosphorus trichloride reacts with excess water to form 137 g
Consider the following chemical equation. Al(OH)3(s) + H2SO4(l) ? Al2(SO4)3(aq) + H2O(l) If 3.30 g of aluminum hydroxide reacts with 1.50 g of sulfuric acid, what is the mass of the water produced
what features would you expect to be different when comparing the ir spectra of serine and tyrosine? provide at least
what volume will 300 ml of gas at 40 degrees celcius and a pressure of 720 mm hg occupy if the temperature is reduced
Calculate the fraction of atom sites that are vacant for silver at 695°C. Assume an energy for vacancy formation
A molecular compound that obeys the octet rule in which all atoms have a zero formal charge is a) BaCl2 b) BrF3 c) NCl3 d) XeF4
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