Answer is 120
Explanation
X is total
if 25% were boys. Then .25x = 40
Divide both sides by .25
X = 160
Total- boys = girl dogs
160-40 = girl dogs
120= girl dogs
Have a nice day. Hope this is helpful.
Based on the information on the student looking for an element that will bond with sodium, the element that will likely bond with sodium is bromine.
<h3>How do elements bond?</h3>
Elements bond with one another in a chemical manner to form compounds, which cannot be broken down into their constituent elements without being destroyed.
According to this question, a student is looking for an element that will bond with sodium (Na) with the knowledge that table salt is a compound of sodium and chlorine (Cl).
This suggests that an element that will likely bond with sodium must be in the same group with chlorine because they will possess the same chemical properties.
Therefore, based on this information, the element that will likely bond with sodium is bromine.
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Answer:
.
Explanation:
Consider the oxidation state on each of the element:
Left-hand side:
- O: -2 (as in most compounds);
- Cr: ;
- Fe: +2 (from the charge of the ion);
Right-hand side:
Change in oxidation state:
- Each Cr atom: decreases by 3 (reduction).
- Each Fe atom: increases by 1 (oxidation).
Changes in oxidation states shall balance each other in redox reactions. Thus, for each Cr atom on the left-hand side, there need to be three Fe atoms.
Assume that the coefficient of the most complex species is 1. There will be two Cr atoms and hence six Fe atoms on the left-hand side. Additionally, there are going to be seven O atoms.
Atoms are conserved in chemical reactions. As a result, the right-hand side of this equation will contain
- two Cr atoms,
- six Fe atoms, and
- seven O atoms.
O atoms seldom appear among the products in acidic environments; they rapidly combine with ions to produce water . Seven O atoms will make seven water molecules. That's fourteen H atoms and hence fourteen ions on the product side of this equation. Hence the balanced equation. Double check to ensure that the charges on the ions also balance.
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Answer:
It is not equal to Avogadro constant
Explanation:
This is because Avogadro constant refer to the number of molecules or atoms of particles per mile substance and thus is equal to 6.022×10^23 per mile or unit of that substance.