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2 years ago

Consider the unbalanced equation for the oxidation of aluminum.

2 answers:

8 0

In order to balance an equation, we apply the principle of conservation of mass, which states that mass can neither be created nor destroyed. Therefore, the mass of an element before and after a reaction remains constant. Here, the balanced equation becomes:
4Al + 3O₂ → 2Al₂O₃

The coefficients are 4, 3 and 2.

Pani-rosa [81]2 years ago

8 0

Answer:

Explanation:

edg 2020

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iren2701 [21]

Answer:

reaction, reversed, The Law Of Conservation of Mass, mass, rusts, oxygen

Explanation:

HOPE THIS HELPS!

4 0

2 years ago

Read 2 more answers

If a 520 mg sample of technetium-99 is used for diagnostic procedure, how much of Tc-99 remains after 30.0h? Half life of Tc-99

k0ka [10]

16.25 mg
I have attached an image of the half life formula.
In this problem, N0 would be 520, since that is the initial amount.
t = 30.0 Hours
t 1/2 = 6.0 hours
Now plug everything into the equation. You get 16.25 mg. No

4 0

3 years ago

A microspectrophotometer measures which of the following?

iragen [17]

Answer : The correct option is, Light absorption

Explanation :

Microspectrophotometer : It is a type of instrument that measures the spectra of the microscopic sample by using the different wavelengths of an electromagnetic radiation.

It is designed to measure the the spectrum of the microscopic sample. It is also measure the transmittance, absorbance, polarization and fluorescence of the microscopic sample.

From the given options, the option light absorption is the correct option.

Hence, a microspectrophotometer measures the light absorption.

4 0

3 years ago

Electronic configurations and charges of the ions<br>in lithium fluoride?

BARSIC [14]

Answer:

Explanation:

The electronic configuration of a lithium atom is 2.1 and that of a fluorine atom is 2.7

an atom of lithium donates an electron to an atom of fluorine to form an ionic compound. The transfer of the electron gives the lithium ion a net charge of +1, and the fluorine ion a net charge of -1.

7 0

3 years ago

What is the pH of the solution if the [H+] is 1 x 10-12 ?

jarptica [38.1K]

Answer:

Explanation:

The pH of a solution can be found by using the formula

$pH = - log [ {H}^{+} ]$

From the question we have

$pH = - log(1 \times {10}^{ - 12} ) \\$

We have the final answer as

Hope this helps you

5 0

3 years ago