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KatRina [158]
3 years ago
12

Some hidden evidence can be seen with this type of light

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

You Would Need A(n) Blacklight Or AKA UV Light

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Write the electron configuration for Br- and state the number of valence electrons. Select one:
Aleks04 [339]

Answer:

1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^62} 4s^{2} 3d^{10} 4p^{5} with 7 valence electrons.

Explanation:

Bromine has 7 unpaired (valence) electrons in its outer shell, and a total of 35 elecrons. Its <em>4s</em> orbital is completely filled with 2 electrons.

The closest answer from the options would be option D.

I hope this helps.

3 0
3 years ago
Which of the following structures surround cells?
8090 [49]
Cells are surrounded by #2 , Cell membrane and Cell wall thats what protects the cell
4 0
3 years ago
How did mendel use his training in mathematics to aid his experiments in life science?
Fittoniya [83]
Mendel use his training in mathematics to aid his experiments in life science by using it for the offspring sexual reproduction. <span>He mainly studied pea plants because they had distinguished characteristics and they were quick to grow. Mendel would create </span>hybrids<span> from the plants. </span>
3 0
3 years ago
Which element mo se na or br contains the most moles of atoms in a 1.0 gram sample?
Fittoniya [83]
To determine this, lets use the atomic mass for each element to determine the corresponding number of moles for a given mass of 1 g.

Mo: 95.94 g/mol
1 g/95.94 g/mol = 0.01042 moles Mo

Se: 78.96 g/mol
1 g/78.96 g/mol = 0.01266 moles Se

Na: 22.99 g/mol
1 g/22.99 g/mol = 0.0435 moles Na

Br: 79.9 g/mol
1 g/79.9 g/mol = 0.0125 moles Br

<em>Thus, the answer is Na.</em>
3 0
4 years ago
How many oxygen atoms are in 5 grams of cupric sulfate pentahydrate.
Montano1993 [528]

Answer: 3 oxygen atoms!

Explanation: Let me know if I'm wrong, if not I'm happy to help!

8 0
3 years ago
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