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olya-2409 [2.1K]
3 years ago
12

If an atom of the following element had a neutral charge, how many electrons would it have?

Chemistry
1 answer:
Yakvenalex [24]3 years ago
8 0

Answer:

31

Explanation:

In order for an atom to have a neutral charge, it needs to have the same number of protons and electrons. You can see by the illustration that the atomic number is 31, so this element has 31 protons. Knowing that, we also know that it must have 31 electrons to be neutral.

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A patient needs to be given exactly 1000 ml of a 5.0% (w/v) intravenous glucose solution. the stock solution is 55% (w/v). how m
LiRa [457]
The patient needs 1000 ml of 5% (w/v) glucose solution
i.e  1000 ml x 5 g/ 100 ml 
where the stock solution is 55% (w/v) = 55 g / 100 ml  
So, 1000 ml x 5 g / 100 ml = V (ml) x 55 g / 100 ml 
V = 1000 x (5 / 100) / (55 / 100) = 5000 / 55 = 90.9 ml 
∴ the patient needs 90.9 ml of 55% (w/v) glucose solution

6 0
3 years ago
500 mL of water is added to 400 mL of 0.35 M HCl. Find the concentration of the diluted solution.
jarptica [38.1K]

The concentration of diluted solution is 0.16 M

<u>Explanation:</u>

As, the number of moles of diluted solution and concentrated solution will be same.

So, the equation used to calculate concentration will be:

M_1V_1=M_2V_2

where,

M_1\text{ and }V_1 are the molarity and volume of the concentrated HCl solution

M_2\text{ and }V_2 are the molarity and volume of diluted HCl solution

We are given:

M_1=0.35M\\V_1=400mL\\M_2=?M\\V_2=(500+400)mL=900mL

Putting values in above equation, we get:

0.35\times 400=M_2\times 900\\\\M_2=\frac{0.35\times 400}{900}=0.16M

Hence, the concentration of diluted solution is 0.16 M

5 0
3 years ago
13. As heat is added to a lúguid that is boiling at constant
11Alexandr11 [23.1K]
Tbh I would pick A because the liquid* decreases. B doesn’t increase
6 0
3 years ago
What name should be used for the ionic compound Ga(SO)? Gallium(III) sulfide gallium(III) sulfate gallium(III) trisulfide galliu
Evgen [1.6K]

Answer: The name given to Ga(SO_4)_3 is Gallium (III) sulfate.

Explanation: This is an ionic compound because in aqueous solution it dissociates into its respective ions.

Naming of Ionic compounds.

  1. Name the cation first and then write its oxidation number in roman numerical.
  2. Then name the anion or polyatomic ions without writing any prefix of the number of atoms present in it.
  3. The name of the anion should have a suffix '-ide' like for chlorine, the name will be chloride etc..
  4. For polyatomic ions, the suffix used will be '-ate' like for SO_4^{2-} the name will be sulfate etc..

Name of the given ionic compound is Gallium (III) Sulfate.

7 0
3 years ago
Read 2 more answers
Define the following terms: i) Rigidity ii) Compressibility and iii) Density
Nutka1998 [239]
Rigidity is the inability to bent or be force out of shape while compressibility is the ability to be flattened, pressed or squeezed into a smaller piece.
density is the degree of compactness of a substance.
3 0
3 years ago
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