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3 years ago

Which statement is true about crystal lattice energy?

2 answers:

5 0

The answear is B <span>The lattice energy increases as the charge of anions increases, as shown by LiF and LiCl. The answer is B. </span>

dmitriy555 [2]3 years ago

4 0

-its made up of separated ions, molecules, or atoms
-its solid matter

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An alkane with the formula C6H14 can be prepared by hydrogenation of either of two precursor alkenes having the formula C6H12. W

EleoNora [17]

H H H H H H
| | | | | |
H-C-C-C-C-C-C-H
| | | | | |
H H H H H H
This is the structural formula for C6H14. Every carbon atom in the molecule must be surrounded by four bonds. Hope this answers your question.

8 0

2 years ago

In which of the following areas is understanding chemistry NOT necessary?

Lyrx [107]

The answer is Human behavior.

6 0

3 years ago

Which element is classified as a noble gas at STP?(1) hydrogen (3) neon(2) oxygen (4) nitrogen

strojnjashka [21]

Neon is the element that is classified as a noble gas at STP.

3 0

3 years ago

The molar absorptivity of a tyrosine residue at 280 nm is 2000 M-1cm-1, while for tryptophan it is 5500 M-1cm-1. A protein has b

adelina 88 [10]

Answer:

There are 4 tryptophans in the protein.

Explanation:

According to question, protein contains one tyrosine residue and say x number of tryptophans.

Concentration of protein solution = 1.0 micromolar = $1.0\times 10^{-6} Molar$

Molar absorptivity of a protein solution : $\epsilon$

$\epsilon = \epsilon _{tyro}+\epsilon _{tryp}$

$=1\times 2000 M^{-1}cm^{-1}+x\times 5500 M^{-1}cm^{-1}$

Length of the cuvette = l = 1.0 cm

Absorbance of protein solution at 280 nm = A = 0.024

$A=\epsilon \times l\times c$ ( Beer-Lambert's law)

$0.024=(1\times 2000 M^{-1}cm^{-1}+x\times 5500 M^{-1}cm^{-1})\times 1 cm\times 1.0\times 10^{-6} M$

Solving for x :

x = 4

There are 4 tryptophans in the protein.

7 0

2 years ago

Help pretty please :)

Hatshy [7]

The answer is 15 bc you multiply the coefficient but the subscript

4 0

2 years ago