Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Suppose there's a crevice or deep hole in a river and all the minerals in the table above are bouncing along the stream's bottom. Heavy minerals will be deposited in the law areas but less dense material will be carried away by the flowing water. What materials would likely be found concentrated along with magnetite in placer deposits? Placer materials settle in holes or crevices at the bottom of the stream because of their higher density. Why should you care about this? Because many precious ores and metals are concentrated with magnetite along the irregular bottoms of streams- The California Rush was impelled by the discovery of placer gold at Sutter's Mill on the American River associated with 'black sand" (magnetite) deposits.
Which materials might be smelted in furnaces that reach a temperature of only 1100°C? Why should you care about this? Because early furnaces could attain temperatures near 1100oC and that only rarely, some ores could be dumped in a furnace but they'd just get hot and wouldn't melt. They might keep toes warm during a cold night but that was just about all they'd be good for.
If a flux that lowers the temperature of each of the above substances by 3003C, which additional materials can be melted in a furnace whose maximum temperature is Only 1100°C? Why should you care about this? Because it requires much less energy to melt something at a lower temperature. Hence people look for a substance (flux) that will lower the melting temperature of a desired substance.
How can you determine which substances would melt with such a flux? Take a hypothetical example. Suppose your table contained the mineral cuprite (a copper oxide) that has a melting temperature of 1235 °C. Obviously it wouldn't melt in a furnace whose temperature could only reach 1100°C. However, a flux which lowered the temperature of melting by 300T from 1235oC - 300oC a 935°C would melt cuprite in such furnace.
What volume of 6.0 M sulfuric acid is required for the preparation of 500.0 ml of 0.30 M solution
Neglect the absorption of other waste gas components into the water, and the evaporation of water into the waste gas stream. What rate is NH3 is being removed from the feed gas? mol/hr
A sample of an ore of iron, hematite, is 56% Fe2O3. How much iron is there in 2 kilograms of the ore?
In a titration experiment to determine the Ksp of Calcium Hydroxide, we titrated our prepared Ca(OH)2 solution with a standard hydrochloric acid solution
you add 7.3 iron to 25.10 of water and observe that the volume of iron and water together is 26.03. calculate the
Calculate mass of the dye per liter Kool Aid solution C in units of grams/L, i got a molecular weight of the dye as 496.42g/mol a concentration of the dye as 1.26x10^-14 mol/L and a mass of Kool Aid of 0.566g
Barium imparts a characteristic green color to a flame. The wavelength of this light is 551nm. Determine the energy involved in kj/mol.
The pH of a sodium acetate-acetic acid buffer is 5.30. Calculate the ratio [CH3COO-]/[CH3COOH].
what is the difference between structural isomers and stereoisomers? would you give me some examples with organic
Problem- A mixture of helium and neon gases at 225 K contains three times the number of helium atoms as neon atoms. The concentration (n/V) of the mixture is found to be 0.150 mol/L. Assuming ideal behavior, what is the partial pressure of helium
a partially filled closed tank contains ethyl alcohol at 68 degrees f. if the air above the alcohol is evacuated what
The activation energy for the isomerization ol cyclopropane to propene is 274 kJ/mol. Explain by what factor does the rate of this reaction enhance as the temperature rises from 243 to 278 oC. The factor is the ratio of the rates.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd