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iogann1982 [59]
3 years ago
12

How many grams are in 1.5 moles of LiF? solve for unknown

Chemistry
1 answer:
Effectus [21]3 years ago
7 0

Answer:

The gram formula mass is the sum of the gram atomic masses of the atoms that make up a chemical formula. For lithium fluoride this works out to be 7g + 19g = 26g. Hence the mass of 1 mole of LiF is 26g; and the mass of 1.5 moles of LiF must be 1.5 × 26g = 39g.

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Which element requires the least i.e. potassium or gallium why
-Dominant- [34]

Answer:

Potassium

General Formulas and Concepts:

<u>Chem</u>

  • Reading a Periodic Table
  • Periodic Trends
  • Ionization Energy - energy required to remove an electron from a given element
  • Coulomb's Law
  • Shielding Effect
  • Z-effective and Forces of Attraction

Explanation:

The Periodic Trend for 1st Ionization Energy is increasing up and to the right. That means He would have the highest I.E and therefore take the most amount of energy to remove an electron.

Potassium and Gallium are both in Period 4. Potassium is element 19 and Gallium is element 31.

Potassium's electron configuration is [Ne] 4s¹ and Gallium's electron configurations is [Ne] 4s²3d¹⁰4p¹. Since both are in Period 4, they have the same number of core e⁻. Therefore, the shielding effect is the same.

However, since Gallium is element 31, it has 31 protons compared to Potassium, which is element 19 and has 19 protons. Gallium would have a greater Zeff than Potassium as it has more protons. Therefore, the FOA between the electrons and nucleus of Ga is much stronger than that of K. Thus, Ga requires <em>more</em> energy to overcome those FOA to remove the 4p¹ e⁻. Since K has less protons, it will have a smaller Zeff and thus less FOA between the e⁻ and nucleus, requiring <em>less</em> energy to remove the 4s¹ e⁻.

7 0
3 years ago
Calculate the molarity of a MgSO4, solution
Gala2k [10]

Answer:

0.058M is molarity of the solution

Explanation:

Molarity is defined as the ratio between the moles of solute (In this case, MgSO₄) and the liters of solution.

In the problem:

<em>Moles MgSO₄: 0.32 moles</em>

<em>Liters solution: 5.5L</em>

<em />

Molarity is:

0.32 moles / 5.5L =

0.058M is molarity of the solution

6 0
3 years ago
How does the labrador current affect the climate of canada and greenland
max2010maxim [7]
The Labrador current affects the climate of Canada and Greenland because it creates one of the densest concentrations of fog in the world occurs.
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3 years ago
The sulfur and nitrogen compounds in smog combine with water to form__.
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The sulfur and nitrogen compounds in smog combine with water to form Acid Rain. Acid rain is harmful to the environment and infrastructure because of its aidic components. 
7 0
3 years ago
Read 2 more answers
How the fossil evidence helped you put the landmasses together (what was your process)
Otrada [13]

Explanation:

The idea behind using fossils to correlate two land masses was first put into limelight by a British geologist, Williams Smith.

According to the principle of fossil and fauna succession "fossils and fauna succeed one another in a define order".

This implies organisms evolve in predictable manner.

Since we know that certain types of organisms live within a period in time on the earth surface, we expect that such organisms would be fossilized in the geologic record and preserved.

  • Identify the fossil record in one part of the land mass. Log the rock types with the corresponding fossils in them.
  • On the other side, repeat the same process.
  • Look for unconformity surfaces where some part of the stratigraphic records might have been lost.
  • If the fossil records on one side corresponds with that on the other other side, it suggests that the land masses must have once been joined together.
  • The logic is that when the organism were on the same land mass, they thrived and lived together.
  • They became fossilized together till the lands separated.

learn more:

fossils brainly.com/question/9415077

#learnwithBrainly

4 0
3 years ago
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