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Basile [38]
3 years ago
6

Using MO theory, predict which of the following species has the longest bond and which the strongest bond, respectively. O2, O2

−, O2 2−
Chemistry
1 answer:
marin [14]3 years ago
8 0
Did you find the answer? Because I am on that question right now for my chem homework
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How many atoms are in 57.5 liters of xenon gas at STP
TiliK225 [7]

Answer:

1.55 × 10²⁴ atoms Xe

General Formulas and Concepts:

<u>Atomic Structure</u>

  • Reading a Periodic Table
  • Moles
  • STP (Standard Conditions for Temperature and Pressure) = 22.4 L per mole at 1 atm, 273 K
  • Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

<u>Stoichiometry</u>

  • Using Dimensional Analysis

Explanation:

<u>Step 1: Define</u>

[Given] 57.5 L Xe at STP

[Solve] atoms Xe

<u>Step 2: Identify Conversions</u>

[STP] 22.4 L = 1 mol

Avogadro's Number

<u>Step 3: Convert</u>

  1. [DA] Set up:                                                                                                       \displaystyle 57.5 \ L \ Xe(\frac{1 \ mol \ Xe}{22.4 \ L \ Xe})(\frac{6.022 \cdot 10^{23} \ atoms \ Xe}{1 \ mol \ Xe})
  2. [DA] Divide/Multiply [Cancel out units]:                                                           \displaystyle 1.54583 \cdot 10^{24} \ atoms \ Xe

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 3 sig figs.</em>

1.54583 × 10²⁴ atoms Xe ≈ 1.55 × 10²⁴ atoms Xe

4 0
3 years ago
The number at the end of an isotope's name is the number
Korolek [52]

Answer:

Atomic neutron mass electron number

Explanation:

7 0
3 years ago
Consider the following system at equilibrium:
Vika [28.1K]

Answer:

1) Rightward shift

2) Rightward shift

3) Leftward shift

4) Leftward shift

5) Leftward shift

6) Rightward shift

7) No shift

8) No shift                                                              

   

Explanation:

To evaluate each case we need to consider Le Chatelier's Principle, which states that the adding of additional reactants or products to a system will shift the equilibrium in the opposite direction, to maintain the equilibrium of the system. On the contrary, if we remove a reactant or a product in the system, the equilibrium will be shifted in the direction of the reactant or product reduced, to produce more of it (and thus maintain balance).        

Taking into account the above, let's see each statement, in the following equation:

A(aq) + B(aq)  ⇄  2C(aq)    (1)

1) Increase A. This will cause a rightward shift in equation 1 in order to consume the reactant added.

2) Increase B. Same as 1), this will cause a rightward in equation 1.

3) Increase C. This will cause a leftward shift in order to consume the excess of product in the system.  

4) Decrease A. This will produce a leftward shift to produce the reactant that is being reduced.

5) Decrease B. Same as 4), a leftward shift.

6) Decrease C. This will produce a rightward shift to produce the product that is being reduced.

7) Double A, half B. The double A will cause a rightward shift and the half B will produce a leftward shift, which results in no shift.

8) Double both B and C. Double B will produce a rightward shift and double C will produce the contrary, a leftward shift, so the final result is no shift.

               

I hope it helps you!

4 0
3 years ago
How do ethical concerns effect scientist research?
mario62 [17]

Answer:

Hi there!

Your answer is:

Ethical concerns dictate everything about scientific research. They determine what can be researched, who it can be researched on, how the data will be presented, how long the subjects can be researched, and more. To get a research study approved by the Institutional Review Board, you need to abide by strong ethical codes. In conclusion, a researchers ethical standings determines everything about their study.

Hope this helps

7 0
3 years ago
Read 2 more answers
Balance the following reaction. Choose "blank" if no coefficient is needed.
coldgirl [10]
The  equation  is balanced   as  follows
Mgcl2 +2AgNo3 -->2Agcl +Mg(No3)2
from  equation  above 1 mole of  MgCl2  reacted  with   2  moles  of  AgNo3  to  form 2 moles  of  AgCl2  and  1 mole  of  Mg(NO3)2
when  balancing  equation   the  number  of  atom  of element  should  be the  same  on  each  side  of  equation.
6 0
3 years ago
Read 2 more answers
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