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A student in the laboratory connects a 10-Ω resistor, a 15-Ω resistor, and a 20-Ω resistor in series and then connects the arrangement to a 50-V dc source.
(a) How much current is in the circuit?
(b) How much power is expended in the circuit?
An unknown solution containing Yellow five dyes displays an absorbance reading of 0.628. Explain the molar extinction coefficient for Yellow 5 dye is 27300 L/mol cm. Explain what is the concentration (in M) of Yellow five in the unknown solution
at constant pressure the temperature of a 8.00 liter sample of gas is decreased from 456 K to 365 K. What is the new volume of the gas sample?
Consider the following energy profile. How many elementary reactions are in the reaction mechanism? How many intermediates are formed in the reaction?
Problem- If a battery releases 550 J of energy and 325 J is used to do work, then how much energy is released / absorbed as heat
If the work function of a metal is 4.39 eV, what is the maximum wavelength of light that can be used to observe the photoelectric effect
Problem- Write a balanced chemical equation for the reaction that occurs when dimethylether CH3OCH3(g), is combusted in air.
Problem- As part of the formation of chromated copper arsenate (CCA), As2O5 is dissolved in an aqueous solution. A product formed in the process is Arsenic acid (H3AsO4). Show the balanced chemical reaction by which it could be formed
How many L of O2 gas at STP, are needed to react with 15.0 g of Na using the following chemical reaction: 2Na(s) + O2(g) => 2NaO(s)?
If atoms of element Z have a mass of 0.815 , what is the identity of Z?
A sample of ammonia gas was allowed to come to equalibrium at 400k. 2NH3(g) N2(g) + 3H2(g) At equalibrium, it was found that the concentration of H2 was 0.0584 M, the concentration of N2 was 0.0195 M and the concentration of NH3 was 0.430 M.
You are given an impure solid that contains 70% of the desired product. After extracting 15g of the material, you recover 6g of the pure compound. What is the percent recovery
Determine at what temperature must a balloon be heated to have six Litres volume consider that the balloon was at the temperature of 25 degree Celsius and volume of two litres initially?
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