Which is the metric root for length? a. gram b. liter c. meter d. second

How many moles of magnesium chloride can be formed from 4.86 g of Mg and 21.27 g of Cl2?

Hoochie [10]

Answer:

Moles of magnesium chloride can be produced are 0.2 moles

Explanation:

The reaction of Mg with Cl2 is:

Mg + Cl₂ → MgCl₂

Where 1 mole of Mg reacts per mole of Cl₂ to produce MgCl₂.

As the reaction is 1:1, we need to convert the mass of both Mg and Cl₂ to moles. The lower number of moles will determine the moles of MgCl₂ that will be produced:

Moles Mg -Molar mass: 24.3g/mol-:

4.86g * (1mol / 24.3g) = 0.2 moles Mg

Moles Cl₂ -Molar mass: 24.3g/mol-:

21.27g * (1mol / 70.9g) = 0.3 moles Cl₂

As moles of Mg < moles of Cl₂, Mg is limiting reactant and moles of magnesium chloride can be produced are 0.2 moles

8 0

3 years ago

How to set up the rate expressions for the following mechanism?

Anestetic [448]

Answer:

Explanation:

From the given information:

A → B k₁

B → A k₂

B + C → D k₃

The rate law = $\dfrac{d[D]}{dt}=k_3[B][C] --- (1)$

$\dfrac{d[B]}{dt}=k[A] -k_2[B] -k_3[B][C]$

Using steady-state approximation;

$\dfrac{d[B]}{dt}=0$

$k_1[A]-k_2[B]-k_3[B][C] = 0$

$[B] = \dfrac{k_1[A]}{k_2+k_3[C]}$

From equation (1), we have:

$\mathbf{\dfrac{d[D]}{dt}= \dfrac{k_3k_1[A][C]}{k_2+k_3[C]}}$

when the pressure is high;

k₂ << k₃[C]

$\dfrac{d[D]}{dt} = \dfrac{k_3k_1[A][C]}{k_3[C]}= k_1A \ \ \text{first order}$

k₂ >> k₃[C]

$\dfrac{d[D]}{dt} = \dfrac{k_3k_1[A][C]}{k_2}= \dfrac{k_1k_3}{k_2}[A][C] \ \ \text{second order}$

3 0

3 years ago

Get Organized! A Periodic Table WebQuest

netineya [11]

<h2>Answer:</h2>

What does Atomic number represents ___________.

What does the Mass number represent ___________

Periods are _____________ rows.

Groups are _____________ columns.

Total elements in periodic table are _____________.

5 0

4 years ago

How do catalysts increase the rate of a chemical reaction?

kramer

They lower the activation energy.

4 0

4 years ago

What is the difference between food web and food chain and what do they have in common?

abruzzese [7]

A food web is a system of interlocking and interdependent food chains.

A food chain is a hierarchical series of organisms each dependent on the next as a source of food.

Basically, the difference of the two is that a food web contains multiple different species in the same level that eat the animal below it's status. A food chain is one after the other.

7 0

3 years ago