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3 years ago

Which best describes what happens during a typical energy conversion?

Chemistry

1 answer:

Dmitry [639]3 years ago

5 0

The best answer for your question would be C. The total amount of all forms of energy stays the same.

First, let's eliminate the wrong choices. According to the Law of Conservation of Energy, you cannot create nor destroy energy, so you can eliminate choices A and B.

Also according to the Law of Conservation of Energy, the total amount of energy will always be the same. It may transform into different forms of energy.

To me, D doesn't sound very correct. For this one you can take an aducational guess, but I do not believe it would be D.

Hope this helps; have a great day!

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If 25.16 g of chlorine react with 12.99 g of manganese metal, what is the empirical formula of the compound?

WARRIOR [948]

We use the given masses of the reactants to calculate the moles of Mn and Cl. Empirical formula represents the simplest mole ratio of atoms present in a compound.

Moles of Mn = $12.99 g Mn * \frac{1 mol Mn}{54.94 g Mn} = 0.236 mol Mn$

Moles of Cl = $25.16 g Cl_{2} *\frac{1 mol Cl_{2}}{70.91 g Cl_{2}} * \frac{2 mol Cl}{1 mol Cl_{2}}$ = 0.710 mol Cl

Simplest mole ratio: $Mn_{\frac{0.236}{0.236}}Cl_{\frac{0.710}{0.236}}$

So the empirical formula is $MnCl_{3}$

6 0

3 years ago

Name the compounds represented by the

katen-ka-za [31]

Answer:

Canxi nito dioxit; Sắt oxit vàng; Amoni dicromat;đồng axitaxetic

Explanation:

7 0

3 years ago

Ammonium perchlorate (NH4ClO4) is a solid rocket fuel used in space shuttles. When heated above 200°C, it decomposes to a variet

Schach [20]

Answer:

This is True

Explanation:

Ammonium perchlorate (NH4ClO4) is a colorless and an oxidizer. It is formed from reaction between Ammonia and perchloric acid. They are used in the manufacture of solid rocket fuel which are used in space shuttles.

When it is heated above 200°C, it decomposes to a variety of gaseous products, of which the most important are N2, Cl2, O2, and water vapor(H2O).

NH3+ HClO4—> NH4ClO4

Ammonia+Perchloric acid to give Ammonium Perchlorate

3 0

4 years ago

Socratic an example of an atom that has no charge is one that has

aksik [14]

An example of an atom that has no charge is one that has a. 2 protons, 2 electrons, and 1 neutron.

To be neutral an atom must have the <em>same number</em> of protons (+) and electrons (-).

Only then will the <em>charges cancel</em> and give a neutral atom.

5 0

4 years ago

Solution A is yellow when alizarin yellow is added and blue when thymol

olga2289 [7]

Answer:

D. 6.3 x 10-5 mol/L NaOH

Explanation:

Alizarin yellow is an indicator that is yellow when pH < 10.1. In the same way, thymol blue is blue when pH > 9

That means the pH of the solution is between 9 - 10.1

Any acid as HCl could have a pH of these.

The solution of 3.2x10⁻⁴M NaOH has a pH of:

pOH = -log[OH-] = 3.49

pH = 14-pOH = 10.51. The pH of the solution is not 10.5

Now, the solution of 6.3x10⁻⁵M NaOH has a pH:

pOH = -log[OH-] = 4.2

pH = 14-pOH = 9.8

The pH of the solution could be 9.8. Right option is:

4 0

3 years ago