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DochEvi [55]
2 years ago
7

Please Help Me! Question is on link down below!

Chemistry
1 answer:
fomenos2 years ago
7 0
Those atoms are in a crystalline structure. That is what is seen in diamonds, which is why they are so hard. All of the atoms have conected to essentially create one giant molecule.
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Write the structures for all the isomers of the –C5H11 alkyl group.
seropon [69]

Answer:

Explanation:

Alkyl groups are those which are derived from alkane by the removal of one hydrogen atom

For example ,methane CH4, and its corresponding alkyl groups is methyl -CH3

5 0
3 years ago
A student took notes in class. - Uses high frequency sound waves - Creates images from echoes - Has many applications - Medical
zmey [24]
The best title for this note will be FEATURES AND APPLICATION OF ULTRASOUND.
All the points listed above are characteristics and uses of ultrasound. Ultrasound is defined as the sound wave which has frequency that is higher than the upper audible limit of human hearing. It is used in many fields including medical field. In the medical field, ultrasound is used as a diagnostics tool to treat many disease conditions.
7 0
2 years ago
Read 2 more answers
Suppose a lab group reports a percent yield of sand of 105%. Is it really possible to collect more sand than was originally pres
just olya [345]
The maximum percent of yield should be 100%, so It wasn't possible to make a higher than 100% yield like 105% in this problem. If that happens, it will contradict the law of conservation of energy as you can't create mass.

The increased mass might be produced by impurities. One of the examples would be if you rinse the container and left some water. The water is not calculated as a substrate but will increase the results weight. 
There also possibilities that some gas in the air react and produce a solid/liquid material. If you don't weight the gas it would seem that the mass increased.
4 0
3 years ago
How to know whether something is an "atom" or not? for example
Karolina [17]
A normal atom has a neutral charge with equal numbers of positive and negative particles. That means an atom with a neutral charge is one where the number of electrons is equal to the atomic number. Ions are atoms with extra electrons or missing electrons.


Butane is a straight chain alkane composed of 4 carbon atoms. It has a role as a food propellant and a refrigerant. It is a gas molecular entity and an alkane.
6 0
3 years ago
I really need help with chemical equations and balanced chemical equations ......
SashulF [63]
What do u need help with? I’m sure I can help you
A chemical equation has 2 sides: the reactives side and the products side
For a chemical equation to be balanced these two side must have the same number of atoms of each type, since in a chemical reaction mass must stay the same

Each symbol in either side will have a subscript. A subscript is the tiny number at the bottom of the symbol. If a symbol has no subscript then that indicate there’s only one atom of that type. However if it has, for example, a 4, then that indicates the are 4 atoms of that type. The thing is these subscripts cannot be changed...
Ex.
HgO —> Hg + O₂
Hg = 1 Hg = 1
O = 1 O = 2
This is an unbalanced equation because the is not oxigen on side that the other.
To balance it u must add a coefficient. This number goes before the whole group of symbols — You can not break apart a group to insert a coefficient in the middle. This number is multiplied by the subscript on each of the symbols in the group. You need to find the correct coefficient to multiply by the elements on both sides of the equation.
Note that this coefficient does no have to be the same on both sides
Answer:
2HgO —> 2Hg + O₂
Hg = 2 Hg = 2
O = 2 O = 2
Explanation:
To fix the oxigen we need to add a coefficient to the side that has less quantity. Because 2 x 1 = 2 (1 Is oxigen’s subscript) we place the 2 in front of the group HgO, But in doing so we damage the mercury, so we need to go to the other side to fix that so we place 2 in front of Hg.

If you need any more help, have some exercises I can further explain or have more doubt about this explanation then let me know and I will help you

Ps: I do recommend you first write the quantity of each atom for each side like I did. It makes it easier to visualize what you have to balance



3 0
3 years ago
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