Acidic solution of potassium dichromate
How many seconds are required to produce 4.94 mg of chromium metal from an acidic solution of potassium dichromate, using a current of 0.234 A?
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A total of 2.00 mole of a compound is allowed to react in a foam coffee cup that contains 162g of water. The reaction caused the temperature of the water to rise from 21.0 C to 24.7 C. What is the enthalpy of this reaction? Assume that no heat is
Consider the titration of 50.0 mL of 0.217 M HN3 (Ka = 2.6 x 10-5) with 0.183 M NaOH. Calculate the pH of the solution after the addition of 29.6 mL of NaOH solution.
In the figure two large, thin metal plates are parallel and close to each other. On their inner faces, the plates have excess surface charge densities of opposite signs and magnitude 6.01 x 10-22 C/m2. What is the magnitude (in N/C) of the el
3 solutions are mixed together to form a single solution. One contains 0.2 moles of Pb(C2H3O2)2, the second one contains 0.1 moles of Na2S, and the third contains 0.1 moles of CaCl2.
Let us say that a fusiform muscle of length L and PCA is attached to bones by tendons of length 0.9L and cross-section area f(PCA) (f<<1) on either end.
80 g of potassium nitrate are dissolved inn 100 ml of water at 60 degrees celsius. at what temperature will potassium nitrate begin to crystallize as the solution cools?
20cm3 of a saturated hydrocarbon required 160cm3 of oxygen for complete combustion 100cm3 of carbon dioxide and 120cm3 of water vapour were produced all measurements being made at the same temperature and pressure deduce the formula of the hydroca
A compound of a transition metal and iodine is 65.1% metal by mass. How many grams of iodine is present in 859 g of this compound?
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identify the group or population, causative factors, and environment of a pertussis epidemic.
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Why are insects great organisms to study for population models? They reproduce quickly. They live for a long time. They
Until fairly recently, prokaryotes were classified as a single group called Kingdom Monera. What has occurred to make scientists change microbial classification
What substances are transported by diffusion through the capillaries? Which substances leave the capillaries by vesicular transport?
What is the relationship between the amount of active hematopoietic tissue and the number of adipocytes observed in the bone marrow?