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Anna35 [415]
3 years ago
12

Which group of elements would generally have the

Chemistry
2 answers:
True [87]3 years ago
5 0
Group 1a because atom size decreases going left to right
nikklg [1K]3 years ago
4 0
Group 1A

As the atomic number of elements in Period 3 (Atomic number 11-18) increases, the atomic radius decreases. The atom with the largest atomic radius is Na which is located in the group 1.
This is because, the effect of increasing proton number is greater than that of the increasing effective nuclear charge; therefore, there is a greater nuclear attraction. The valence electrons are held closer towards the nucleus of the atom. As a result, the atomic radius decreases.
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PLEASE HELP!!!!!!!
dsp73

Answer: 1. 2Al+3CuCl_2\rightarrow 2AlCl_3+3Cu

2. 3 moles of CuCl_2 : 2 moles of Al

3. 0.33 moles of CuCl_2 : 0.92 moles of Al

4. CuCl_2 is the limiting reagent and Al is the excess reagent.

5. Theoretical yield of AlCl_3 is 29.3 g

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}    

\text{Moles of} Al=\frac{25.0g}{27g/mol}=0.92moles

\text{Moles of} CuCl_2=\frac{45.0g}{134g/mol}=0.33moles

The balanced chemical equation is:

2Al+3CuCl_2\rightarrow 2AlCl_3+3Cu  

According to stoichiometry :

3 moles of CuCl_2 require = 2 moles of Al

Thus 0.33 moles of CuCl_2 will require=\frac{2}{3}\times 0.33=0.22moles  of Al

Thus CuCl_2 is the limiting reagent as it limits the formation of product and Al is the excess reagent.

As 3 moles of CuCl_2 give = 2 moles of AlCl_3

Thus 0.33 moles of CuCl_2 give =\frac{2}{3}\times 0.33=0.22moles  of AlCl_3

Theoretical yield of AlCl_3=moles\times {\text {Molar mass}}=0.22moles\times 133.34g/mol=29.3

Thus 29.3 g of aluminium chloride is formed.

5 0
3 years ago
What are the 4 different types of chemical reactions? And how to remember them
Tju [1.3M]
<span>Synthesis, decomposition, single replacement and double replacement.</span>
4 0
3 years ago
Read 2 more answers
How is Earth's surface most likely to change in a cold place that experiences rainfall?
Ghella [55]

Answer:

I think the answer would have to be D

7 0
3 years ago
In what order do electrons fill orbitals within the 3p sublevel? Electrons don’t fill orbitals; protons and neutrons fill orbita
lorasvet [3.4K]

 The order  do electron fill  orbitals within the 3p sublevel  is that they spread  out, waiting  until each orbital  has one electron before  doubling  up.


<u><em>Explanation</em></u>

<u> </u> According    to   hund's  rule  every orbital in a   subshell  is singly  occupied  with  one  electron before  any one orbital  is  doubly  occupied,and  all electrons  in   singly occupied  orbital have the same spin.

when every orbital  in a subshell is   singly  occupied by electrons it is then  doubled, and the two electrons  in same orbital  have  opposite spins


4 0
3 years ago
Which image displays a chemical property about a substance? Choose all that apply
spin [16.1K]

Answer:

Answer: II and IV

Explanation: Flammability and the ability to rust are chemical properties because they change an object. I, III, and V are physical properties because it doesn't change the object's composition. This includes weight, the change in matter (solid to liquid), or change in volume.

Hope this helps!!!

Explanation:

8 0
3 years ago
Read 2 more answers
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