Explain why might sample not have the same melting range

Assignment Help Chemistry
Reference no: EM13127795

Important information about Melting Point
* unknown compound that shows an observed melting range of 90-94 Ë?C. Which is to be, X (listed mp 97-98 Ë?C) or candidate Y (listed mp 86-87 Ë?C). Why might your sample not have the same melting range as either of the known compounds, given that it must be one of them?

*test tubes labeled A, B, and C contain substances with the same melting points. How could you prove (using the melting point technique) the test tubes contained three different chemical compounds?

Reference no: EM13127795

Questions Cloud

What volume of 0.45 m hcl solution would be needed : For the reaction 2 HCl + Na2CO3 → 2 NaCl + H2O + CO2 what volume of 0.45 M HCl solution would be needed to produce 2.5 L of CO2 at STP
Initial investment required for project : This project is expected to generate $44,000 of net cash inflows each year of its 6 year life. The project has no salvage value. What was the initial investment required for this project?
Plot the market-share data and discuss possible causes : Given the following data on Asian and European Share of U.S. Light Truck Sales(1990-2003): Plot the market-share data. (b) Describe the trend (if any) and discuss possible causes. (c) Fit three trends (linear, exponential, quadratic).
Design a heat exchanger for the following duty : Design and optimize a suitable shell-and-tube heat exchanger that can satisfy the above mentioned duty and fix a tentative geometry and perform all standard calculations
Explain why might sample not have the same melting range : Why might your sample not have the same melting range as either of the known compounds, given that it must be one of them?
Determining annual cost savings : He does remember that the machine has a projected life of 12 years. Based on these data, the annual cost savings are:
Calculate the heat released : Calculate the heat released when 2.00L of Cl2(g) with a density of 1.88 g/L react with an excess of sodium metal as 25°C and 1 atm to form sodium chloride. [H°f(NaCl) = -411.0 kJ/mol
Derivatives of tan theta : An observer to a rocket launch was 1800 feet from takeoff position. The observer found the angle of elevation of the rocket as a function of time to be theta=3t/(2t+5).
Find probability that selected item is tv : A manufacturing company has three factories: X, Y, and Z. The daily output of each is shown here. If one item is selected at random, find these probabilities. It is a TV

Reviews

Write a Review

Chemistry Questions & Answers

  How many total hydrogen atoms are in this solution

A solution of ammonia and water contains 3.00×10^25 water molecules and 5.80×10^24 ammonia molecules. How many total hydrogen atoms are in this solution?

  Determine monomer will have higher degree of polymerization

Determine which monomer will have the higher degree of polymerization (DP) and by how much?

  What will the final temperature be

The temperature of 1.5 kg of ethanol is 37°C. What will the final temperature be if 80,000 J of energy as heat is added to the ethanol.

  Calculate the ph

Calculate the pH after 0.020 mol NaOH is added to 1.00 L of a solution which is 0.100 M NH2OH and 0.100 M HONH3Cl.

  Compute the atomic weight

Compute the atomic weight for this naturally occurring element A and A Naturally occurring element A exists in three forms of its isotopes

  Determine how many grams of alcl3 are formed

determine How many grams of AlCl 3 are formed if 30.0 grams of Hydrogen are produced? It is given that the molar mass of AlCl 3 =133.33 g/mol.

  Reasons for the rekindling of magnesium fires

When relatively small amounts of magnesium burns, the fires are extinguished using commercially available dry powder. Why might this fire rekindle days later as someone tries to remove the residue with water?

  Find the wavelength of light

AgBr is the light-sensitive compound in most photographic films. Assume, when film is exposed, that the light energy absorbed dissociates the molecule into atoms.

  How will you prepare the solutions

How will you prepare the following solutions from 6.0 M solutions of acetic acid and ammonia. Give exact details. Assume that a 10-mL graduated cylinder.

  What is the minimum temperature reached by the solution

The heat of solution of ammonium chloride is 15.2 kJ/mol. If a 6.253 g sample of NH4Cl is added to 65.0 mL of water in a calorimeter at 26.9°C.

  Determine the partial pressure of ar

Determine the partial pressure of Ar, argon gas in the flask and A flask is filled with 1.20 of argon Ar gas at the temperature of  twenty five degree Celsius.

  Calculate the ph of the solution

A 20.0-mL sample of 0.800 M HBr solution is titrated with 0.800 M NaOH solution. Calculate the pH of the solution after the following volumes of base have been added.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd