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Natali [406]
2 years ago
7

Select two that are true

Chemistry
1 answer:
Inessa [10]2 years ago
8 0

Answer:

The two that are true are, "this represents a pure compound in two different states" and "it represents a mixture a solid and a gas".

Explanation:

This two are concluded only from the picture and the use of uniform colors throughout the picture (Showing the same element).

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This is not chemistry but it's A, off top.

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3 years ago
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Due to the small and highly electronegative nature of fluorine, the oxyacids of the this element are much less common and less s
steposvetlana [31]
We are told we have an oxyacid of the formula HOFO. We will assume the atoms are in this order and will draw a proper lewis structure for this compound by first drawing bonds between each of the 4 atoms and then place the remaining electron pairs on each atom:
      ..    ..    ..
H - O - F - O:
      ··   ··    ··
We can calculate the formal charge of an atom using the following formula:

Formal charge = [# of valence electrons] - [# of non-bonded electrons + # of bonds]

H: Formal charge = [1]-[0+1] = 0

O: Formal charge = [6]-[4+2] = 0

F: Formal charge = [7]-[4+2] = +1

O: Formal charge = [6]-[6+1] = -1

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4 0
3 years ago
What is 0.000980 in scientific notation
JulijaS [17]

Answer:

9.80x10^-4

Explanation:

5 0
3 years ago
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The enzyme, carbonic anhydrase, is a large zinc-containing protein with a molar mass of 3.00 x10^4 g/mol. Zn is 0.218% by mass o
tia_tia [17]

The mathematical expression for mass percent is given by:

Mass percent = \frac{mass of the compound}{molar mass of the compound}\times 100

Put the values,

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Now, according to mole concept

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= 1 atom of zinc.

Hence, every carbonic anhydrase molecule consists of 1 atom of zinc.



5 0
3 years ago
Can DNA evidence exclusively conclude ancestry?
In-s [12.5K]

Answer:yes

Explanation:

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