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3 years ago

How many moles of barium chloride are present in 6.5l of a 3m solution

Chemistry

1 answer:

Contact [7]3 years ago

8 0

Answer:

The answer to your question is 19.5 moles

Explanation:

Data

moles = ?

Volume = 6.5 l

Molarity = 3 M

Molarity is a unit of concentration that relates the number of moles by the volume (liters).

Formula

Molarity = moles / Volume

-Solve for moles

moles = Molarity x Volume

-Substitution

moles = 3 x 6.5

-Result

moles = 19.5

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Is the equation above balanced or unbalanced? Explain? Worth 55 points.

Paul [167]

Answer:

For me, it is balanced

Explanation:

Because the amount of element Zn reaction is equal the production. Also as the amount of Hydrogen and Chloride in the reaction and the production are equal.

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3 years ago

Read 2 more answers

What is the wavelength of radiation that has a frequency

White raven [17]

Answer:

$\lambda = \frac{c}{\nu}$

Explanation:

The wavelenght of a radiation is inversely proportional to its frequency. It can be estimated by the following formula:

$\lambda = \frac{c}{\nu}$

Where:

$\lambda$ is the wavelenght
$\nu$ is the frequency
$c$ is the speed of light (arroung 300000 km/s)

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3 years ago

Why is it important to control the reaction rate of the chemical process

xxTIMURxx [149]

$Mg+2HCl=MgCl_2+H_{2(g)}$

The reaction creates dihydrogen, hence if it's uncontrolled it could lead to potentially dangerous amounts of gas being released at once.

8 0

3 years ago

How many grams of NaCl (molecular weight = 58.4 g mole-1) would you dissolve in water to make a total volume of 500 mL of soluti

kolezko [41]

Given :

Volume , V = 500 mL .

Molarity , M = 0.5 M .

Molecular mass of NaCl is $58.4\ g/mole$ .

To Find :

How many grams of NaCl is required .

Solution :

Let , NaCl required is x gram .

Molarity is given by :

$M=\dfrac{\text{Number of moles}}{\text{Volume (in liters) }}\\\\M=\dfrac{m}{M\times V}\\\\0.5=\dfrac{x}{58.4\times 0.5}\\\\x=0.5^2\times 58.4\ g\\\\x=14.6\ g$

Hence , this is the required solution.

6 0

2 years ago

Free-energy change, ΔG∘, is related to cell potential, E∘, by the equation ΔG∘=−nFE∘ where n is the number of moles of electrons

elena-s [515]

Answer:

-372000 J or -372 KJ

Explanation:

We have the electrochemical reaction as;

Mg(s) + Fe^2+(aq)→ Mg^2+(aq) + Fe(s)

We must first calculate the E∘cell from;

E∘cathode - E∘anode

E∘cathode = -0.44 V

E∘anode = -2.37 V

Hence;

E∘cell = -0.44 V -(-2.37 V)

E∘cell = 1.93 V

n= 2 since two electrons were transferred

F=96,500C/(mol e−)

ΔG∘=−nFE∘

ΔG∘= -( 2 * 96,500 * 1.93)

ΔG∘= -372000 J or -372 KJ

4 0

2 years ago