Write in the shape of the molecule at the atoms indicated by arrows attached to boxes with “shape:” written in them.

4. The molecule pictured below is AZT. It is a widely used drug for the treatment of AIDS. The Lewis structure below is complete except for electron lone pairs. For this structure: a. Draw in all missing electron lone pairs. b. Write in the shape of the molecule at the atoms indicated by arrows attached to boxes with “shap ...continues

A toothpaste contains 0.24% by mass of sodium fluoride used to prevent caries (cavities) and 0.30% by mass of triclosan (C12H7Cl3O2). A PRESERVATIVE + ANTIGINVITIS AGENT.

A toothpaste contains 0.24% by mass of sodium fluoride used to prevent caries (cavities) and 0.30% by mass of triclosan (C12H7Cl3O2). A PRESERVATIVE + ANTIGINVITIS AGENT. a) How many moles of NaF are in a tube of toothpaste b) How many moles of F- are in a tube? c) How many grams of Na+ are in 1.50g of toothpaste? d) How man ...continues

Vitamin c content of juices

1. Calculate the molarity of the ascorbic acid solution: (a) Mass of ascorbic acid used:0.1 (b) Moles of ascorbic acid (MW=176.1 g/mol):not sure (0.000568g/moL) (c) Volume of solution (mL): 100.01mL (d) Ascorbic acid concentration (mol/L): 2. For each titration, record and calculate the follo ...continues

In the following problem, first find how many grams of oxygen would be used to completely react with 230 grams of pentyl alcohol?

1. In the following problem, first find how many grams of oxygen would be used to completely react with 230 grams of pentyl alcohol (C5H11OH)? How many grams of oxygen would be used? See attached file for full problem description.

Molecular formula of a compound

1. What is the molecular formula of a compound? See attached file for full problem description.

Calculate the empirical formula of this salt

Calculate the empirical formula of this salt. See attached file for full problem description.

How many grams of acetylene are needed for combustion

How many grams of acetylene are needed for combustion. See attached file for full problem description.

Calorimetry

100.0 ml of an acid solution and 100.0 ml of a base solution were combined in a calorimeter. A temperature change of 7.50 degrees Celsius was measured. The density of the final solution was measured to be 1.045 g/ml. The specific heat of the final solution was 4.04 J/g - degrees Celsius. How many Joules of heat were evolved in ...continues

Net ionic equations

Write the balanced molecular equation, complete ionic and net ionic equation for the following acid base reaction. HCL(aq) + NH3(aq) NH3 is an exception, so I'm not sure what to do with it.

Titration of a Strong Acid

Procedure 1 ( click to view assignments for this procedure ) PLEASE NOTE: Titration requires several steps in order to obtain exact results. 1. Take a clean Erlenmeyer flask from the Glassware shelf and place it on the workbench. 2. Add 25 mL HCl (of unknown concentration) to the flask. 3. Add 2 drops of phenolphth ...continues