How many kilojoules of heat are absorbed
Calcium carbide (CaC2) can be made by heating calcium oxide (lime) with carbon (charcoal).? CaO(s) + 3 C(s) + heat As†' CaC2(s) + CO(g) Î"H = +464.8 kJ
How many kilojoules of heat are absorbed in a reaction in which 65.6 g C(s) are consumed?
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A homogeneous powder, derived from a sample of Ayre's Rock in Australia, is known to contain 33.31% Fe. The titration method used in your lab for Fe determinations is known to have a standard deviation of 0.27% Fe.
A microwave oven operates at 2.40 GHz. What is the wavelength of the radiation produced by this appliance? in nano meters
Write a Structural formula for a molecule containing three carbonatoms that represent ans alcohol, an organic acid, and anester.
A gas with a volume of 525 mL at a temperature of -25 Celsius isheated to 175. What is the new volume of the gas if pressure andnumber of moles are held constant?
What is the best method to use to determine if moleculesare polar or nonpolar? Also with regards to intermolecular forces, what does polarizability mean and how do we determine if one molecule had a greater polarizability than another?
A particular household ammonia solution (d = 0.97 g/mL) is6.8% NH3 by mass. How many milliliters of this solution should be diluted with water to produce 613 mL of a solution with pH = 11.56?
A gas is compressed at a constant pressure of 0.320 atm from a volume of 8.00 L to 5.00 L. In the process, 400 J of heat energy flows out of the gas. What is the work done by the gas? What is the change in its internal energy?
Consider the combustion of ethylene, C2H4 (g) + 3 O2 (g) ------> 2 CO2 (g) + 2 H2O (g). If the concentration of C2H4 is decreasing at the rate of 0.025 M/s, what are the rates of change in the concentrations of CO2 and H2O?
If an analyte exhibits both absorbance and fluorescence at a given excitation wavelength, what will doubling the irradiance beam do,if anything?
It is only through the study of isolated and purified elements and their combination that one can observe characteristic properties and make cause and effect relationships.
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