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3 years ago

DUPLICATE

1 answer:

7 0

As in relative abundance , one is take reference
So,
One is taken as 1:
Other is subtracted from it:
(1 - 0.6011)(atomic mass of Ga-71)

Equation can be written as:
69.723 = (0.6011)(68.9256) + (1-0.6011)x 
(1-0.6011) is the percentage abundance of Ga-71 expressed in percentage: 

Solving for x 
28.2918 = 0.3989 x 
x= 70.9246.......

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Compare the values of the spin quantum number for two electrons in the same orbital.

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Private school and the cashapp one of my favorite classes and I can get it

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4 years ago

Substance A is a nonpolar liquid and has only dispersion forces amongits constituent particles. Substance B is also a nonpolar l

alekssr [168]

Answer:

(a) when both the liquid are mixed, they become completely miscible as the intermolecular forces between them are equal to the intra molecular forces

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Explanation:

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3 years ago

Heat being added or taken away from a substance may cause

tiny-mole [99]

Question 1: A change in state
Question 2: Are two terms for the same thing
Question 3:
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3 years ago

Titrations provide a method of quantitatively measuring the concentration of an unknown solution.

jekas [21]

Answer: True

Explanation:

Titration is a quantitative technique where a solution of known concentration is used to determine the concentration of an unknown solution. The titrant (the known solution) is added from a burette to a known quantity of the the unknown solution until the reaction is complete.

By knowing the volume of titrant, we can determine the concentration of the unknown.

Thus the statement Titrations provide a method of quantitatively measuring the concentration of an unknown solution is True .

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3 years ago

A flame test of a colorless solution gives a bright yellow color. When reacted with AgNO3 a white precipitate forms that dissolv

hichkok12 [17]

Answer:

The compound is Na2CO3

Explanation:

A flame test of a colorless solution gives a bright yellow color. The yellow color shows the presence of Sodium.

NaX + AgNO3 → AgX + NaNO3

When reacted with AgNO3 a white precipitate.

AgX + HNO3 → AgNO3 + H2O + CO2

A white precipitate will be formed when AgNO3 reacts with Sodium Chloride (NaCl) or Sodium carbonate(Na2CO3). (Also NaF, Na3PO4 are possible).

When HCL is added to the unknown solution, bubbles form.

Forming bubbles means that there is formed CO2 (and H20)

Na2X + 2HCl → 2NaCl + H2O + CO2

To form CO2 there is carbon needed

This shows that X is CO3 and the compound is Na2CO3

To control:

Na2CO3 + AgNO3 → Ag2CO3 + NaNO3

⇒Ag2Co3 is the white precipitate formed

This precipitate Ag2CO3 + HNO3 will disolve in AgNO3, CO2 and H2O

When Na2CO3 reacts with HCl there is formed NaCL together with bubbles ( which is CO2 and H2O).

The compound is Na2CO3

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3 years ago