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jolli1 [7]
3 years ago
10

50 points for 2 questions and brainliest! Please help!!!!

Chemistry
1 answer:
zhannawk [14.2K]3 years ago
7 0

<em><u>Answer:</u></em>

<em><u> a)</u></em>

<em><u /></em>

<em><u>Explanation:</u></em>

<em><u /></em>

<em><u>6HCl + 2Al ---> 2AlCl3 + 3H2</u></em>

<em><u /></em>

<em><u>6 mol                 2 mol</u></em>

<em><u /></em>

<em><u>As we can see 6 mol HCl produce 2 mol AlCl3.</u></em>

<em><u /></em>

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What is the ph of the solution prepared by dissolving 0.927 mol hcl in enough water to make a 150 l aqueous solution?
Brilliant_brown [7]

Answer:

The answer to your question is pH = 2.2

Explanation:

Data

pH = ?

moles of HCl = 0.927

volume = 150 l

Process

1.- Calculate the Molar concentration of HCl

Molarity = moles / volume (L)

Molarity = 0.927 / 150

              = 0.00618

2.- Calculate the pH

pH = -log [HCl]

Substitution

pH = -log [0.00618]

Result

pH = 2.2

8 0
3 years ago
What does the term division of labor mean as it relates to cells?
lidiya [134]

Answer:

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Explanation:

7 0
2 years ago
How many Mg atoms are presented in 3.00 moles of MgCl2
ella [17]

Answer:

1.81 x 10²⁴ atoms

Explanation:

To find the number of atoms in the given number of moles, we need to understand that every substance contains the Avogadro's number of particles.

More appropriately, a mole of any substance will contain the Avogadro's number of particles which is 6.02 x 10²³ atoms

 So;

           If 1 mole of a substance  = 6.02 x 10²³ atoms;

               3 mole of MgCl₂ will contain 3 x 6.02 x 10²³ = 1.81 x 10²⁴ atoms

3 0
3 years ago
A gas that effuses through a porous cylinder 1.87 times faster than chlorine gas. what is the molar mass and identity.
Rufina [12.5K]
From the Graham's law of effusion;
R1/R2 = √MM2/√MM1
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Therefore;
1.87= √ 71 /√mm1
= 1.87² = 71/mm1 
mm1 = 71/1.87²
         = 71/3.4969
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6 0
3 years ago
Which of these items best describes the arrangement of electrons in an atom of sulfur? A. Eight electrons in its first energy le
Serga [27]

D. Two electrons in its first energy level; eight electrons in its second energy level; six valence electrons in its outermost energy level.

Please correct me if I'm wrong!! :)


6 0
2 years ago
Read 2 more answers
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