To complete this summary, fill in each blank with the correct word or phrase. Then, use the key below to check
your answers. You can use this page to review the main
concepts of the lesson. A magnet is any material
that attracts iron or any
substance that contains iron. There are different types of magnets.14 Magnetic materials exert
and have magnetic
and 15 If the of
a material are lined up, the object will be
magnetic.16 A material such as iron is
17 A(n)
is a magnet produced by electricity.18 An object can become
a(n)
magnet by rubbing the object with
the end of a magnet. Earth acts like a magnet because it has
properties similar to those of magnets.19 Earth has a and
north and south

What is the name of this hydrocarbon?

A3.37-mg sample of protein was chemically digested to convert its nitrogen into ammonia and then diluted to 100.0 ml. then 10.0 ml of this solution was placed in a 50-ml volumetric flask and treated with 5 ml of phenol solution plus 2 ml of sodium hypochlorite solution. the sample was diluted to 50.0 ml, and the absorbance at 625 nm was measured in a 1.00-cm cuvette and found to be 0.486. for reference, a standard solution was prepared from 10.0 mg of nh4cl (molar mass = 53.49 grams/mole) dissolved in 1.00 l of water. then 10.0 ml of this standard was placed in a 50-ml volumetric flask, treated in the same manner as the unknown, and the absorbance found to be 0.323. finally, a reagent blank was prepared using distilled water in place of unknown, it was treated in the same manner as the unknown, and the absorbance found to be 0.076. calculate the weight percent of nitrogen in the protein.

The vapor pressure of ethanol is 1.00 × 102 mmhg at 34.90°c. what is its vapor pressure at 61.61°c? (δhvap for ethanol is 39.3 kj/mol.)