Which of the following metal atoms would have the highest conductivity?

Answers

Answer 1

Answer: Conductivity is a way that an atom reacts. Therefore, when we say "highest" we mean the most reactive. Elements or atoms that are highly reactive are those that want to be stable. Therefore, the atoms that have 7 valence electrons would be highly reactive because they need 1 more electron to fill their outer energy shell to become stable.

Answer 2

Answer:

Answer:The atom with the largest radius and the most valence electrons.

Explanation:it just makes sense and it’s also right.

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If 2.27 moles of bromine react with excess phosphorus, how many moles of phosphorus tribromide will be produced

The atoms of Group 7A elements _____ electrons when they form ions.A. share
B. gain
C. lose
D. cannot be determined

Answers

There are various kind of elements that are present in periodic table. Some elements are harmful, some are halogens, some are radioactive. Option B is correct option.

What is periodic table?

Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.

Periodic table help a scientist to know what are the different types of elements are present in periodic table so that they can discover the new elements that are not being discovered yet.

Group 7A elements includes halogens elements like Fluorine, Chlorine, Bromine and iodine, whose electronegativity is very high in whole periodic table. These element gain electron very easily.

Therefore, the correct option is option B.

Learn more about periodic table, here:

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The answer is B. gain. The elements from group 7a is F, Cl, Br, I... These elements has 7 electrons at the outer shell. And they are likely to gain one electron to stay at stable status.

A drop of vinegar ( a weak acid ) is placed on a sample of each of the materials below. Which will show the most active reaction? A. glass
B. marble
C. copper
D. steel

Answers

Answer: Option (B) is the correct answer.

Explanation:

Marble is also known as calcium carbonate and its chemical formula is $CaCO_(3)$ .

When it combines with vinegar then it results in the formation of calcium acetate which is a water soluble compound along with the release of carbon dioxide which occurs in the form of bubbles and water.

The reaction is as follows.

$CaCO_(3) + CH_(3)COOH \rightarrow Ca(CH_(3)COOH)_(2) + H_(2)O + CO_(2)$

Whereas vinegar being a weak acid will not react with glass, copper and steel.

Answer: B

Explanation: I got it right on my test

Brainliest?

Calculate the molecular mass of HCL

Answers

molecular mass of HCl :

H = 1.00794
Cl= 35.453

HCl :

1.00794 + 35.453 = 36.46094 g/mol

hope this helps!

Hydrogen peroxide can be prepared by the reaction of barium peroxide with sulfuric acid according to

Answers

Answer:

31.43 ml of sulfuric acid is needed to react with 23.1 g of barium peroxide.

Explanation:

For the reaction:

BaO₂(s) + H₂SO₄(aq) ⇒ BaSO₄(s) + H₂O₂(aq)

We need 1 mole of BaO₂ to react with 1 mole of H₂SO₄ and then forming 1 mole of BaSO₄ and 1 mole of H₂O₂.

We know that 4.5 M solution of H₂SO₄ means 4.5 moles of H₂SO₄ in 1000 ml of solution.

Then,

23.1 g BaO₂ × $(1 mole_(BaO_2))/(163.33g_(BaO_2))$ × $\frac{1 mole_{H_(2)SO_(4)}}{1mole_(BaO_2)}$ × $\frac{1000ml}{4.5 mole_{H_(2)SO_(4)}}$ = 31.43 ml H₂SO₄

BaO₂ + H₂SO₄ ⇒ BaSO₄ + H₂O₂
169g : 98g
23.1g : mx

mx = [23.1*98g]/169g ≈ 13.4g
Mr = 98g/mol

n = 13.4g/98g/mol ≈ 0.14mol

Cm = 4.5M
n = 0.14mol

V = 0.14mol/4.5mol/dm³ ≈ 0.031L = 31mL

Molarity. 0.5 GRAMS of sodium chloride is dissolved to make 0.05 liters of solution.

would it be the same as..

0.5 MOLES of sodium chloride is dissolved to make 0.05 liters of solution?

please help me with the grams. thank you (: first time using this!

Answers

Find if the same solution would be equal:
=> 0.5 grams of Sodium chloride dissolved in 0.05 liters solution
=> 0.5 moles of sodium chloride dissolved in 0.05 liters solution
The answer is NO. They are not equal because 0.5 grams of sodium chloride is equivalent to 10 moles of sodium chloride which makes 0.5 grams of sodium chloride mixed with 0.05 liters of solution more concentrated than 0.5 moles of sodium chloride dissolved in 0.05 liters of solution.

During diffusion, when the concentration of molecules on both sides of a membrane is the same, the molecules will (1 point).

move across the membrane to the outside of the cell.
stop moving across the membrane.
continue to move across the membrane in both directions.
move across the membrane to the inside of the cell.

Answers

During the diffusion process, when the concentration of molecules on both sides of a membrane is the same, the molecules will continue to move across the membrane in both directions.

will continue to move across the membrane in both directions.

i hope this helps you ( c )

have a wonderful day

~hailey lee~

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