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Nezavi [6.7K]
2 years ago
14

Determine the percentage composition of Ptl2

Chemistry
1 answer:
Hitman42 [59]2 years ago
7 0

Answer:

Percent Composition

1. Find the molar mass of all the elements in the compound in grams per mole.

2. Find the molecular mass of the entire compound.

3. Divide the component's molar mass by the entire molecular mass.

4. You will now have a number between 0 and 1. Multiply it by 100% to get percent composition.

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They aren't actually placed into the atom, they surround it in the "electron cloud" but if you add electrons, the charge of your atom becomes negative. If your remove them, the charge becomes positive
3 0
4 years ago
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
What is the complementary DNA sequence for C G T T A C C G in chargaff's rule?
djverab [1.8K]

Answer:

Chargaff's rule, also known as the complementary base pairing rule, states that DNA base pairs are always adenine with thymine (A-T) and cytosine with guanine (C-G). A purine always pairs with a pyrimidine and vice versa. However, A doesn't pair with C, despite that being a purine and a pyrimidine.

Explanation:

In these nucleotides, there is one of the four possible bases: adenine (A), guanine (G), cytosine (C), or thymine (T) (Figure below). Adenine and guanine are purine bases, and cytosine and thymine are pyrimidine bases. Chemical structure of the four nitrogenous bases in DNA✔✔

8 0
3 years ago
Which of the following will speed up a reaction?
defon

Answer:

C

Explanation:

Imcreased tmperature will speed up a reaction/process.

4 0
3 years ago
Read 2 more answers
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