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In 1897 the Swedish explorer Andreé tried to reach the North Pole in a balloon. The balloon was filled with hydrogen gas. The hydrogen gas was prepared from iron splints and diluted sulfuric acid. The reaction is
Fe(s)+H2?SO4?(aq)?FeSO4?(aq)+H2?(g)
The volume of the balloon was 4800m3and the loss of hydrogen gas during filling was estimated at 20.%.What mass of iron splints and 98% (by mass) H2?SO4?were needed to ensure the complete filling of the balloon? Assume a temperature of 0°C,a pressure of 1.0 atm during filling, and 100%yield.
If the rate constant of a first order reaction is 4.87X10-5 s-1 at 15 degrees C compute the rate constant at 80 degrees C if the activation energy is 250 Kj/mole (R=8.314J/K)
consider a nonmetal atom which we will give the symbol x. the element x is a gas at room temperature and can easily
The molar heat capacity of SO2 is given by the following equation: Cpm= 3.093 + 6.967x10^-3 T/K -45.81x10^-7 T^2/k^2 + 1.035x10^-9 T^3/K^3. Calculate delta S for the heating of 1 mol of SO2(g) from 75C to 1350C at a constant pressure of 1 bar
draw a lewis strucutre for the molecule n4o. spectroscopic analysis of the molecule reveals that the nitrogen-oxygen
(a) How many moles of potassium ions are in 272 g alum. (b) What is the mass % S in alum (to 3 significant figures). (c) What is the maximum amount of alum (in metric tons) that can be prepared from 16.7 metric tons of scrap aluminum (1 metric ton..
Compute the percents ionic character of the interatomic bonds for the following compounds: TiO2, ZnTe, CsCl, InSb, and MgCl2.
When 100.0mL water at an unknown temperature is mixed with 50.0mL water at 10 degrees Celsius, the final temperature is 30 degrees Celsius. Explain what was the original temperature of water
Calculate the number of joules of heat required to change 85.0 grams of water at 25 degrees C to steam at 100 degrees C (heat of vaporization of water = 2260 J/g and specific heat of water = 4.18 J/g C)
What is the most common chemical method for removing H30+ ions in aqueous solution? Net equation for the solution?
What characteristic H NMR absorptions would be expected in the aliphatic region for 9-hydroxyfluorene
A typical gauge pressure for optimal performance of automobile tires is 32 lb/in2. What is this pressure in grams per square centimeter and kilograms per square meter
Measurements also show that a certain sample of the unknown compound contains 6.9 mol of oxygen and 2.32 of chromium
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