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tester [92]
3 years ago
15

Wofür steht die Abkürzung „PUR“?

Chemistry
1 answer:
Lunna [17]3 years ago
8 0

Explanation:

polyurethane, a polymer

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Explain how to calculate the number of grams in 5.50 x 1022 atoms.
Neporo4naja [7]

Answer:

See below

Explanation:

From periodic table, find Mole Weight of the element in question

 this is the grams of the element in Avagadro's Number (6.022 x 10^23)  of atoms

   (5.50 x 10^22) / (6.022 x 10^23)  x mole weight = grams

7 0
1 year ago
Salt crystals are shaped like cubes. Salt is part of the _____. isometric crystal system monoclinic crystal system hexagonal cry
sweet [91]
Salt crystals are shaped like cubes. Salt is part of the isometric crystal system. 
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3 years ago
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Some distilled water is added to an empty beaker. a gram of copper (ii) nitrate is added to the beaker and while the water is be
Xelga [282]
Copper ions, nitrate ions, and water is in the beaker
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3 years ago
If my primary DNA strand is ATACCGCAA <br> a write the complimentary DNA strand
Liula [17]

Answer:

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Explanation:

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6 0
3 years ago
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How many hydrogen atoms are in 4.40 mol of ammonium sulfide
katrin2010 [14]
 The number  of hydrogen  atoms  that are  in 4.40  mol  of ammonium sulfide is  2.12 x10^25  atoms

      calculation
 find the number of moles  of Hydrogen  in ammonium sulfide  (NH4)2S

that is  4.40  x  number of hydrogen atoms in (NH4)2S ( 4x2= 8  atoms)

moles is  therefore=  4.40  x8= 35.2  moles

by  use of  Avogadro's law  constant

that is  1mole =  6.02 x10^23 atoms
         35.2  moles=?

by  cross multiplication
  {35.2 moles x 6.02 x10^23} /1 mole  = 2.12  x10^25  atoms
5 0
3 years ago
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