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coldgirl [10]
3 years ago
7

4 Al + 3 O2 --> 2 Al2O3

Chemistry
1 answer:
SIZIF [17.4K]3 years ago
5 0

Answer:

The answer to your question is 7.4 moles of Aluminum

Explanation:

Data

moles of Al = ?

moles of Al₂O₃ = 3.7

Balanced chemical reaction

                4 Al  +  3 O₂  ⇒  2 Al₂O₃

To solve this problem use proportions and cross multiplication. Use the coefficients of the balanced chemical equation.

                4 moles of Aluminum ----------------- 2 moles of Al₂O₃

                 x                                  ----------------- 3.7 moles of Al₂O₃

                            x = (3.7 x 4) / 2

                            x = 14.8 / 2

                            x = 7.4 moles of Aluminum

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A substance with a high pOH would likely have which of the following?
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Explanation:

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Thus as pOH and OH^- are inversely related, a solution having higher pOH will have less amount of OH^- concentration. And a solution having more pOH will have less pH.

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Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory as a primary standard. It has the unw
Tomtit [17]

Answer:

0.1082M of Barium Hydroxide

Explanation:

KHP reacts with Ba(OH)2 as follows:

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<em>Where 2 moles of KHP reacts per mole of barium hydroxide</em>

<em />

To solve this question we must find the moles of KHP in 1.37g. With these moles and the reaction we can find the moles of Ba(OH)2 and its molarity using the volume of the solution (31.0mL = 0.0310L) as follows:

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1.37g * (1mol / 204.22g) = 0.006708 moles KHP

<em>Moles Ba(OH)2:</em>

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0.003354 moles Ba(OH)2

<em>Molarity:</em>

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4 0
3 years ago
Please help thank you
Darina [25.2K]

Based on the Hund's Rule, the three electrons in a 2p orbital are arranged as shown in option C.

<h3>What is an orbital?</h3>

The term orbital refers to a region in space where there is a high probability of finding the electron. We know that an electron in an atom could be defined by the use of four sets of quantum numbers which are;

  • The principal quantum number
  • The orbital quantum number
  • The spin quantum number
  • The magnetic quantum number

Hund's rule states that, electrons occur singly before pairing takes place. In this case, we can see that the only arrangement that obeys the Hund's Rule is option C.

Learn more about Hund's rule:brainly.com/question/12646067

#SPJ1

7 0
8 months ago
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