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Black_prince [1.1K]
3 years ago
8

Select the two statements that are TRUE about compounds

Chemistry
1 answer:
patriot [66]3 years ago
4 0

a) a compound always contains at least 2 elements

is the answer

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How many protons and neutrons are there in an atom of boron11?
Komok [63]
5 protons and six neutrons
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3 years ago
Propenoic acid is an unsaturated carboxylic acid. Describe how you could show
Anestetic [448]

Answer:

Tests for unsaturation involves addition across the multiple bonds in the unsaturated compound.

Explanation:

In organic chemistry, we define an unsaturated compound as any compound that contains a double or triple bond. These multiple bonds are also known as pi bonds.

There are two major tests for unsaturation which shall both be discussed here.

The first test for unsaturation is by the use of bromine water. The unknown sample is passed through a solution of bromine water which normally appears reddish brown. The bromine water becomes decolorized due to addition of bromine across the multiple bond. This is a standard test for unsaturation.

Secondly, unsaturated compounds decoulourize a solution of potassium permanganate when passed through it. This alone can not be used as a distinctive test for unsaturation.

Propenoic acid will give a positive test to the both reagents showing that it contains multiple bonds, in this particular instance, a double bond.

4 0
3 years ago
What is a scientific model? How is a scientific model helpful to the brain for relaying a scientific
Vladimir79 [104]

Answer: A scientific model is a physical and mathematical and conceptual representation of a system of ideas, events or processes.

ANd also for your second question i dont know what you mean?

Explanation:

4 0
3 years ago
Balance the equations.<br> Zn+ HCl →<br> ZnCl2 +
motikmotik

Answer:

Zn + 2HCl → ZnCl2 + H2

Explanation:

Zn + HCl → ZnCl2 +

The complete equation is given below:

Zn+ HCl → ZnCl2 + H2

Now we can balance the equation by doing the following:

There are 2 atoms of Cl and 2 atoms of H on the left. This can be balanced by putting 2 in front of HCl as shown below:

Zn + 2HCl → ZnCl2 + H2

7 0
4 years ago
En tu cuaderno, realiza una ficha informativa sobre cómo podrían aplicar los cálculos estequiométricos para la estandarización d
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<h2>Espero Haberte ayudado Eee</h2><h2></h2>

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