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lesantik [10]
3 years ago
14

Match each of the unknown ions to its appropriate description.

Chemistry
2 answers:
mafiozo [28]3 years ago
6 0

Answer:

C) V3− A) A nonmetal that gained one electron

A ) X− B) A metal that lost one electron

B) Y+ C) A nonmetal that gained three electrons

D ) Z3+ D) A metal that lost three electrons

Explanation:

balu736 [363]3 years ago
4 0

Answer : The correct match of the unknown ions to its appropriate description will be:

V²⁺   →    (C) A metal that lost two electrons

X³⁺   →    (D) A metal that lost three electrons

Y³⁻   →    (B) A nonmetal that gained three electrons

Z²⁻   →    (A) A nonmetal that gained two electrons

Explanation :

For the neutral atom, the number of protons and electrons are equal. But, they are unequal when the atoms present in the form of ions or the atom has some charges.

When an unequal number of electrons and protons then it leads to the formation of ionic species.

Ion : An ion is formed when an atom looses or gains electron.

  • When an atom looses electrons, it will form a positive ion known as cation.
  • When an atom gains electrons, it will form a negative ion known as anion.

For example : The neutral atom Na has equal number of protons and electrons i.e 11 but Na^+ ion has unequal number of protons and electrons that means it has 11 number of protons and 10 number of electrons.

As per question,

V²⁺ is a metal that lost two electrons  and it will form a positive ion known as cation.

X³⁺ is a metal that lost three electrons  and it will form a positive ion known as cation.

Y³⁻ is a nonmetal that gained three electrons  and it will form a negative ion known as anion.

Z²⁻ is a nonmetal that gained two electrons  and it will form a negative ion known as anion.

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Kruka [31]
Just use the Heisenberg Uncertainty principle: 

<span>ΔpΔx = h/2*pi </span>

<span>Δp = the uncertainty in momentum </span>
<span>Δx = the uncertainty in position </span>
<span>h = 6.626e-34 J s (plank's constant) </span>

<span>Hint: </span>

<span>to calculate Δp use the fact that the uncertainty in the momentum is 1% (0.01) so that </span>

<span>Δp = mv*(0.01) </span>

<span>m = mass of electron </span>
<span>v = velocity of electron </span>

<span>Solve for Δx </span>

<span>Δx = h/(2*pi*Δp) </span>

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6 0
3 years ago
Calculate the molarity of the sodium acetate solution as described below.
Airida [17]

Answer:

This question is incomplete.

Explanation:

This question is incomplete because of the absence of given mass and volume, however, the steps below will help solve the completed question. The molarity (M) of a solution is the number of moles of solute per liter of solvent. The formula is illustrated below;

Molarity = number of moles (n) / volume (in liter or dm³)

To calculate the number of moles of NaC₂H₃O₂, we say

number of moles (n) =

given or measured mass of NaC₂H₃O₂ ÷ molar mass of NaC₂H₃O₂

The volume of the solvent must be in liter (same as dm³). Thus, to convert mL to liter, we divide by 1000

The unit for Molarity is M (Molar concentration), mol/L or mol/dm³

4 0
2 years ago
What is the molarity if I take 10mL of 20 volumes Hydrogen Peroxide?
Kryger [21]

Answer:

1.635 M

Explanation:

Given:

10 mL of 20 volumes Hydrogen Peroxide

Here,

20 volumes of Hydrogen Peroxide means that on decomposition of 1 mL of H₂O₂ 20 mL of O₂ is obtained

also,

means 1 dm³ of H₂O₂ solution produces 20 dm³ oxygen

Now,

at 298K and 1 atm

20 dm³ oxygen = \frac{\textup{20}}{\textup{24.47}}  moles

or

= 0.817 moles

also,

2H₂O₂ → 2H₂O + O₂

thus,

1 dm³ of solution must contain 2 × moles of O₂ as moles of H₂O₂

thus,

Number of moles of H₂O₂ = 2 × 0.817

or

Number of moles of H₂O₂  = 1.635 moles

Hence,

For 20 volume hydrogen peroxide is 1.635 M

3 0
3 years ago
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tia_tia [17]
Be= Beryllium= weight 9.01
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Since there are 2 Chlorine, you have to add Chlorine twice.
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Answer: 79.91
(This answer does not include sig.figs)
4 0
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lesya692 [45]
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8 0
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