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If 200 g of water is contained in a 300g aluminum calorimeter at 20°C and 20g of steam at 100°C is introduced into the calorimeter
Explain why light intensity is dependent on the distance the detector is from the light source. Describe the mathematical relationship. Explain why all comparative measurments for this experiment sh
purified a new protein and find that it contains 0.154 percent Mn. Assuming that there are three atoms of manganese per molecule of protein, what is the molar mass of the protein
A 0.500 kg length of copper wire is warmed 30.0°C by the passage of electrical current. How much heat was generated by the current flow
what is the molarity of a 99.O mL ethanol solution containing 8.11g of ethanol (C2H5OH)
How would you prepare methyl,phenyl,ketone starting with 1-bromobenzene without using a grignard reaction. please show reactants and intermediates
The equation of a transverse wave traveling along a very long string is given by y = 6.9 sin(0.025(pi)x + 4.5(pi)t), Determine the transverse displacement
A thin double convex lens is to focus the image of an object onto a screen so that the image is life-sized. What is the distance d from image to screen
How would the calculated molar mass change(increase,decrease,no change) if the following experimental problems were encountered? explain the reason for your answer. (a)the unknown was impure and onl
Find the total power radiated out into space by the Sun assuming it to be at a temperature of 5500 K and the emissivity is 1
the vapor pressure of mercury Hg is .00180 mmHg at 77F. if Hg vapor reached equilibrium at this temperature in an enclosed space, what would the concentration of Hg be in the space. Assume normal at
A double convex thin glass lens has equal radii of curvature. The focal length of the lens is +63.5 cm, find The index of refraction of the glass of the plano-convex lens
Can someone give me a step by step solution from the Quantatative chemical analysis text from author Daniel c. Harris(the 8th edition) problem CH4-4-E. It about a confidence level.
A fish appears to be 7.00 m below the surface of a pond when viewed almost directly above by a fisherman
why do we have to make sure we light the fire and remove the lighter quickly to burn the nuts
A small earthquake starts a lamppost vibrating back and forth. find the time constant for the damping of the oscillation
If 250.0 mL of 0.354 M Phosphoric acid need to be prepared, how many grams of H3PO4 need to be added to water to make this solution
A river narrows at a rapids from a width of 15m to a width of only 6.0m. The depth of the river before the rapids is 2.7m ; the depth in the rapids is 0.70m. Find the speed of water flowing in the r
so I have the reaction CuCl2 + H4ClSiO4. what I dont have is what this makes afterward, could someone please explain to me what the Molecular, total ionic and net ionic equations would be
An iron bolt is used to connect two iron plates together. The bolt must withstand shear forces up to about 3150 N. Calculate the minimum diameter for the bolt
100 ml sample of hard water is titrated with the ETDA solution in problem 2. the volume of EDTA required to reach the end point is 22.44 ml
What are the 6 kingdoms used to classify all living organisms and list all six kingdoms and what organisms are in each.
Complete combustion of 7.60 g of a hydrocarbon produced 24.3 g of CO2 and 8.70 g of H2O. What is the empirical formula for the hydrocarbon?