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Suppose you are trying to determine the melting point of a compound, and then the following happens.
A) The compound turn from white to brown before melting
B) The compound slowly disappear from the capillary tube before melting.
Describe what happen in each case. How would you either report or correct it?
Describe the Rutherford's model of the atom and compare it with the model proposed by his student Niels Bohr. What is meant by 3p^3
The pKa of epinephrine is 8.55. In a solution of what ph will epinephrine have a charge and what will the charge be
Assuming that the peaks are Gaussian, calculate the % resolution, i.e. calculate the area under the first peak which lies to the left of half way between the two peaks.
Consider the following reaction: A(g)= B(g)+C(g) Find the equilibrium concentrations of A, B, and C for each of the following different values of Kc. Assume that the initial concentration of A in each case is 1.0 M
A 25.5g aluminum block is warmed to 65.3 degC and plunged into an insulated beaker containing 55.0g water initially at 22.3 degreeC. The aluminum and the water are allowed to come to thermal equilibrium.
what is the total pressure in the reaction flask at the end of the reaction? What are the partial pressures of the gases in the flask? 4A(g) + 6B(g) ? 2A2B3(g)
a sample of 1.05 g of lead ii nitrate is mixed with 130 ml of 0.106 m sodium sulfate solution. what are the
How many milliliters of 0.02 N standard versenate solution would be required in the API titration for total hardness? b) Express the concentrations of Ca2+ and Mg2+ in parts per million
62.8 mL of air is collected over water at 24 degrees celsius and 733 mm Hg pressure. find the volume of the dry air at STP
Find a formula for the curvature of the function P= nrt/v-nb - (an^2)/(v^2) ,where n, R, a, b,and T are treated as constants.
What is the formula and name for the following (1) KOH+HBr,(2) Zn+AgNO3,(3) K+NaCl, (4) HCl+NaOH (5) BaCl2+NaSO4 (6) H2+O2
At 25°C, K = 0.090 for the following reaction. H2O(g) + Cl2O(g) reverse reaction arrow 2 HOCl(g) Calculate the concentrations of all species at equilibrium for each of the following cases.
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