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tamaranim1 [39]
3 years ago
5

What is a lone pair?

Chemistry
1 answer:
gregori [183]3 years ago
7 0

Answer:

I BELIEVE IT is c.

Explanation:

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Ammonia is a principal nitrogen fertilizer. It is prepared by the reaction between hydrogen and nitrogen. 3H2(g) + N2(g) → 2NH3(
sergey [27]

Answer:

Explanation:

The equation of the reaction is given as:

             3H₂ + N₂ → 2NH₃

Given parameters:

Number of moles of NH₃ = 8moles

Number of moles of H₂ = ?

Number of moles of N₂ = ?

Solution

From the balanced reaction equation, we can establish some mole ratios that would help solve the problem:

 To find the number of moles of H₂;

      The equation shows that:

              2 moles of NH₃ were produced using 3 moles of H₂

therefore: 8 moles of NH₃ will be produced by  \frac{8 x 3}{2} = 12moles

So, 12 moles of hydrogen gas will react to give 8 moles of ammonia.

   To find the number of moles of N₂

 The equation shows that:

       2 moles of NH₃ were produced from 1 mole of N₂

      8 moles of NH₃ would be produced from  \frac{8 x 1}{2} = 4moles of Nitrogen gas

Therefore, 4moles of nitrogen gas would be produced

6 0
3 years ago
A protein has the amino acid sequence
kherson [118]

Answer:

Number of peptide fragments resulting from cleaving with cyanogen bromide? A: Three peptide fragments

Number of peptide fragments resulting from cleaving with trypsin? A: Four peptide fragments

Which of these reagents gives the smallest single fragment (in number of amino acid residues)? A: CnBr, a dipeptide fragment consisting of AL (Alanine-Leucine)

Explanation:

Cyanogen bromide cleaves the methionine C-terminus, then we have a first fragment of 8 amino acids: DSRLSKTM, a second fragment of 15 aas YSIEAPAKLDWEQNM, and a last fragment of only 2 aas is produced, AL

Trypsin cuts the C-terminus of Arginine and Lysine, then we'll have a first fragment of 3 aas DSR, a second fragment consisting of also 3 aas LSK, a third fragment of 10 aas TMYSIEAPAK, and a last fragment of 9 aas LDWEQNMAL.  All produced in three cut sites.

6 0
4 years ago
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