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3 years ago

Write a balanced chemical equation for the reaction that occurs when Mg(s) reacts with Cl2(g).

Chemistry

1 answer:

Julli [10]3 years ago

5 0

Explanation:

When magnesium reacts with chlorine then it forms magnesium chloride.

Equation -

Mg + Cl₂ → MgCl₂

This is the example of Combination reaction.

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Researchers want to determine the best temperatures for storing batteries. Describe a possible experiment and list the variables

Andrew [12]

How about putting one battery in the freezer while putting another by a radiator or something that gives off heat. Leave them for an hour, then place them in an object that uses batteries and time how long it takes for it to die: Note: It may take many hours for the battery to fully deplete.

4 0

3 years ago

How many half-lives are required for the concentration of reactant to decrease to 1.56% of its original value?4247.56.56

neonofarm [45]

Answer:

6 half-lives are required for the concentration of reactant to decrease to 1.56% of its original value.

Explanation:

Using integrated rate law for first order kinetics as:

$[A_t]=[A_0]e^{-kt}$

Where,

$[A_t]$ is the concentration at time t

$[A_0]$ is the initial concentration

Given:

Concentration is decreased to 1.56 % which means that 0.0156 of $[A_0]$ is decomposed. So,

$\frac {[A_t]}{[A_0]}$ = 0.0156

Thus,

$\frac {[A_t]}{[A_0]}=e^{-k\times t}$

$0.0156=e^{-k\times t}$

kt = 4.1604

The expression for the half life is:-

Half life = 15.0 hours

$t_{1/2}=\frac {ln\ 2}{k}$

Where, k is rate constant

So,

$k=\frac {ln\ 2}{t_{1/2}}$

$\frac{4.1604}{t}=\frac {ln\ 2}{t_{1/2}}$

$t = 6\times t_{1/2}$

<u>6 half-lives are required for the concentration of reactant to decrease to 1.56% of its original value.</u>

6 0

3 years ago

The bottom of a box has a surface area of 25.0 cm 2 . The mass of the box is 34.0 kilograms. Acceleration due to gravity at sea

Viktor [21]

Pressure given by:
Pressure=(force)/(area)
Force=Mass*gravitational pull
Mass=34Kg
gravity=9.80

so,
force=34*9.8=333.2
thus;
pressure=333.2/25=13.328=13.3 N/cm^2

Hope this helped :)

5 0

3 years ago

Sodium react gently with water ture or false<br>

Maksim231197 [3]

false,

sodium has a vigorous reaction with water.

This can be observed by putting a piece of sodium in water,

it moves swiftly across the surface of water and reacts violently.

5 0

3 years ago

How many mole of oxygen are present in 3 mole of sodium sulfate, Na2SO4

GarryVolchara [31]

N(Na₂SO₄)=3 mol

n(O)=4n(Na₂SO₄)

n(O)=4*3=12 mol

3 0

3 years ago