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Lelechka [254]
2 years ago
11

Plastic beads used in jewelry making are made of long molecules usually consisting of carbon, hydrogen, and oxygen. Compare the

bonding in these molecules to the bonding in gems. (typed answers recommended)
Chemistry
1 answer:
bazaltina [42]2 years ago
4 0

This question is requiring a comparison between the bonding in gems and plastic beads, which of course have different natures. Thus, we can conclude that bonding in gems usually ionic because they comprise metal-nonmetal compounds with large electronegativity differences, such as Al₂O₃.

On the other hand, bonding in plastics, in general, tends to be covalent because hydrogen, carbon and oxygen have way similar electronegativities.

<h3>Types of bonds:</h3><h3 />

In chemistry, the formation of chemical compounds require the appearance of forces able to held atoms together. These forces are called bonds and can be covalent, metallic or ionic depending on the bonding substances. For instance, compounds formed a nonmetal and a metal tend to be ionic, whereas substances formed by two nonmetals tend to be covalent.

In addition, the type of bond defines most of the properties the substance has, thus, ionic bonds lead to solid and molecularly well-defined crystal structures whereas covalent bonds lead to amorphous solids.

In such a way, since gems have gorgeous appearances and are way resistant to high pressures, shear and temperatures, we conclude they have ionic bonds formed between metals and nonmetals.

However, plastic, such as that in plastic beads, will have covalent bonds because it is easily deformed and it is not able to withstand high temperatures, pressures or mechanical shears.

Moreover, the nature of the bonding depends on the electronegativity, which is the tendency an atom has to attract electrons; for that reason, large electronegativity differences lead to the formation of ionic bonds (metals and nonmetals, distant in the periodic table) whereas small differences lead to covalent ones.

Learn more about bonding: brainly.com/question/792566

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scale. Mercury thermometers can be used to determine body, liquid, and vapor temperature.

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not air

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3 0
2 years ago
A sample of a compound containing boron (B) and hydrogen (H) contains 5.443 g of B and 1.522 g of H. The molar mass of the compo
Svetach [21]

You are calculating the empirical formula of this chemical compound, which is the question with moles, molar mass, and number of moles.

first you divide the mass of BORON by its molar mass(relative formula mass)because there is a formula about moles state: number of moles=mass/molar mass.

So, 5.443/11 is about 0.5. Then, the RFM of H is 1, so the number of mole is 1.522/1=1.522.

Next, you get the number of moles in order is; 0.5 and 1.522. Now we need to look at the ratio between these numbers. 0.5 is smaller so we use it as the ratio of 1.  next use 1.522/0.5 is 3.044 which has a greatest common factor of 3. so the empirical formula is BH3.

Now we are going to solve the molecular formula.

the molar mass ofthis compound is 30g, so we're going to find the RFM of the empirical formulsof BH3 first.

11+3=14.

now we see how many times 14 goes into 30. 30/14=2.14 which is about 2.

So now we need to times the subscript of the empirical formula by two.

thus, the molecular formula is B2H6.


To solve this kind of  questions, there are many steps:Know what you are calculating about, it's about the molecular formula, so you need to find out the number of moles of each elements. then use the molar mass of the whole compound to calculate the molecular formula.

1) Find the RFM of the element, because that is the molar mass(mass of 1 mole) of this element.

2) number of moles= mass/molar mass. use this formula to help you get the number of moles of each element in this compound

3) look at the relationship between the number of moles of each elements. find out the ratio between them.

4) then use the molarmass of the whole compound to find the molecular formula. molar mass of the whole compound/RFM(molar mass) of the empirical formula of elements= the number you need to multiply by the subscript of the empirical formula to get the molecular formula.

please tell me if i got anything wrong;)



4 0
2 years ago
In a given column of the periodic table the elements have _____.
kakasveta [241]

Answer:

a. similar properties

Explanation:

In a given column of the periodic table, the elements have similar properties.

A column on the periodic table is known as a group or family. The group is a vertical arrangement of elements  on the periodic table.

Elements in the same group have the same number of valence electrons after their group number.

For example, all the elements in group 1 have one valence electron. Those in group 2 have 2 valence electrons.

The valence electrons of an atom determines its chemical properties. So, all elements in the same group have the same chemical properties.

6 0
3 years ago
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