A 44.4 mL sample of a 0.300 M solution of NaCN is titrated by 0.100 M HC1, K₁ for CN is 2.0 × 10-5. Calculate the pH of the solution: a. prior to the start of the titration pH b. after the addition of 93.2 mL of 0.100 M HCl PH = c. at the equivalence point pH d. after the addition of 173 mL of 0.100 M HCl pH =

2. (i) State an example of a compound that is not a molecule and state an example of a molecule that is not a compound. Then, (ii) explain how you made your choices.

Write a discussion on the topic of chemical identity by a conductivity test and melting point test?

does hydrogen exist as an atomic element in the air?

n lo Report Form, Density of Nails, Baby Oll, ana MOPE Analysis of Results and Other Questions Densities (in g/cm at 25°C) 6. Assuming your nails are made of one of the elemental metals in the table (right), what is the most likely Mg 1.74 metal? How confident are you that they are made up of that metal? Explain. Zn 7.14 Cr 7.15 Sn 7.26 niloded lo sl Fe 7.87 Ni 8.90 8.96 Pb 11.3 Au 19.3 o dee 7. (a) Search the web for a value for the density of baby oil (if no T is given, it is assumed to be near room T): Source company or site name where you got the value (don't list the full URL): (b) Search the web (Google is best here) for the density of mineral oil from Sigma-Aldrich (a chemical company): (c) As you learned during your prelab (hopefully!), baby oil and mineral oil are not pure substances. As such, their composition (and thus density) can vary a bit, which would not be so for a pure substance (at a given T). That is why you likely found varying values-or ranges of values-for baby…

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Question 34 of 50 > 0.5 / 1 View POIICIES Show Attempt History Current Attempt in Progress Mercury, water, and bromine are liquids at standard temperature. Their molar entropies are in the sequence H2O < Hg < Br2. Incorrect. Using molecular properties, explain why bromine is more disordered than mercury. Select those that apply. Bromine is diatomic. Mercury is monoatomic. Diatomics are more ordered than monoatomics. Water has strong hydrogen bonding interactions. O Hydrogen-bonded substances are less ordered than substances without hydrogen-bonds.