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Two different mixtures of gasahol are accessible the first containing 23% alcohol and the second 30% alcohol. Explain how many gallons of the second mixture must be added to 220 gallons of the first mixture to produce a mixture containing 27% alcohol?
The density of sodium borohydride is 1.492g*cm3. If 3.93 g of sodium borohydride contains 2.50*10^23 H atoms, Explain how many moles of H atoms are present in 28.0 cm3 of sodium borohydride
What is the molecular formula of a compound of empirical formula CH that diffuses 1.24 times slowly than krypton at the same temperature and pressure?
consider the reaction 4nh37o2--gt 4no26h2o. at a certain instant the initial rate of the disappearance of oxygen gas is
Determine a polymer with a number average molecular weight of 6,200 Daltons. The polymer is made of two different fractions. The first fraction has 40 molecules while the second one has 60 molecules with molecular weight of 7,000 Daltons. Compute
How many unit cells are in exactly 1 cm3?
The carbon-14 in a living organism is constant until the organism dies, after which carbon-14 decayss with first order kinetics and a half life of 5730 years. Suppose a bone from an ancient human contains 19.5%of the C-14 found in living organisms..
What will be the final temperature of a mixture made from 25.0 g of water at 15.0 degrees C, 45.0 g of water at 50.0 degrees C, and 15.0 g of water at 37.0 degrees C?
The alpha particles emitted by radon-222 have an energy of 8.8 x 10^-13 J. If a 200. g Pb brick absorbs 1.0 x 10^10 alpha particles from radon decay, what dose in rads will the brick absorb
Which reaction responds more strongly to changes of temperature, one with an activation energy of 52 kJ mol-1 or one with an activation energy of 25 kJ mol-1
raising the total pressure from P0 (the initial air pressure) to P1 (the total final pressure of H2(g) + air).Compose an algebraic expression for the volume (V2) that this sample of H2(g) would occupy if it were isolated
Classify each of the following as a pure substance, heterogeneous mixture, solution, or colloid. gravy, vinegar, ether, beef stew, seltzer water, salad, sodium carbonate
Given that the most common mineral in limestone is calcium carbonate, describe how these limestone objects are corroded by the sulfuric acid in polluted air. What chemical reaction is involved here?
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