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2 years ago

If 4.5 moles of AlCl3 were made, how many moles of CuCl2 were used?

Chemistry

1 answer:

Troyanec [42]2 years ago

7 0

Answer:

6.75 moles of CuCl₂ were used

Explanation:

Given data:

Number of moles of AlCl₃ formed = 4.5 mol

Number of moles of CuCl₂ used = ?

Solution:

Chemical equation:

3CuCl₂ + 2Al → 2AlCl₃ + 3Cu

Now we will compare the moles of CuCl₂ and AlCl₃

AlCl₃ : CuCl₂

2 : 3

4.5 : 3/2×4.5 = 6.75

6.75 moles of CuCl₂ were used.

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Calculate the pHpH of a 0.10 MM solution of HClHCl . Express your answer numerically using two decimal places.

alisha [4.7K]

Answer: The pH 0f 0.10 solution of HCl is 1.00

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.

$pH=-\log [H^+]$

$HCl\rightarrow H^++Cl^{-}$

According to stoichiometry,

1 mole of $HCl$ gives 1 mole of $H^+$

Thus $0.10$ moles of $HCl$ gives = $\frac{1}{1}\times 0.10=0.10$ moles of $H^+$

Putting in the values:

$pH=-\log[0.10]$

$pH=1.00$

Thus pH 0f 0.10 solution of HCl is 1.00

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2 years ago

Is milk a solution, suspension, compound , colloid ?

kakasveta [241]

Answer:

Colloids (heterogeneous)

The difference between a colloid and a suspension is that the particles will not settle to the bottom over a period of time, they will stay suspended or float. An example of a colloid is milk. Milk is a mixture of liquid butterfat globules dispersed and suspended in water.

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2 years ago

How many visible impact craters does the moon contain?

frez [133]

I believe the answer is B. a million or more.

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3 years ago

11) A sample of rhenium of suspected extrasolar origin (translation: not from this solar

jarptica [38.1K]

<u>Answer:</u>

<em>Atomic number 75 is dedicated to an element named rhenium and has been given Re as its chemical name.</em>

<u>Explanation:</u>

With a really low concentration it is one of the rarest metals that is found in Earth's crust.

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2 years ago

Determine Δngas for each of the following reactions:(b) 2H₂(g) + O₂(g) ⇄ 2H₂O(l)

elixir [45]

2H₂(g) + O₂(g) ⇄ 2H₂O(l)

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= -3

<h3>What is Δngas?</h3>

The number of moles of gas that move from the reactant side to the product side is denoted by the symbol ∆n or delta n in this equation.

Once more, n represents the growth in the number of gaseous molecules the equilibrium equation can represent. When there are exactly the same number of gaseous molecules in the system, n = 0, Kp = Kc, and both equilibrium constants are dimensionless.

<h3>Definition of equilibrium</h3>

When a chemical reaction does not completely transform all reactants into products, equilibrium occurs. Many chemical processes eventually reach a state of balance or dynamic equilibrium where both reactants and products are present.

Learn more about Equilibrium

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1 year ago