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Novosadov [1.4K]
2 years ago
14

What are the lanthanide & actinide series?

Chemistry
1 answer:
ch4aika [34]2 years ago
8 0

Answer:

 

The lanthanides and actinides together are sometimes called the inner transition elements.

Explanation:

They are called this because they come up in the periodic table after actinium

Hope this helps :)

You might be interested in
What mass of iron is needed to react with sulfur in order to produce 96 grams of
Setler79 [48]

The balanced equation for the reaction is as follows;

2Fe + 3S ---> Fe₂S₃

molar ratio of Fe to Fe₂S₃ is 2:1

mass of Fe₂S₃ to be produced is - 96 g

therefore number of moles of Fe₂S₃ to be produced is - 96 g / 208 g/mol

number of Fe₂S₃ moles = 0.46 mol

according to the molar ratio

when 2 mol of Fe reacts with 3 mol of sulfur then 1 mol of Fe₂S₃ is produced

that for 1 mol of Fe₂S₃ to be produced - 2 mol of Fe should react

therefore for 0.46 mol of Fe₂S₃ to be produced - 2 x 0.46  = 0.92 mol of Fe is required

mass of Fe required - 0.92 mol x 56 g/mol  = 51.5 g

mass of Fe required is - 51.5 g

8 0
3 years ago
Read 2 more answers
What type of reaction is Mg + Cl^2>MgCl^2
Paul [167]

Answer:

Synthesis.

Explanation:

Synthesis reaction:

It is the reaction in which two or more simple substance react to give one or more complex product.

For example:

Mg + Cl₂ → MgCl₂

when magnesium combine with chlorine it form magnesium chloride.

Magnesium is alkaline earth metal and present in group two. Magnesium has two valance electrons. Magnesium atom loses its two electron to complete the octet.  Chlorine is halogen element and have seven valance electrons. Chlorine needed one electron to complete the octet. When it combine with magnesium atom it accept the two electrons from magnesium atom that's why two chlorine atoms are combine with one magnesium atom to make the compound neutral.

3 0
2 years ago
Hydrocortisone valerate is an ingredient in hydrocortisone cream what is the percent by mass of carbon
sladkih [1.3K]
The chemical formula of hydrocortisone valerate is C26H38O6. First, we determine the molar mass of the substance by adding up all the products of the number of atoms and the molar mass of atoms as shown below.
                        molar mass = 26(12) + 38(1) + 6(16) = 446 g/mol
Since, there are 26 atoms of carbon in each molecule, the mass of carbon in each mole is 
                     mass of carbon = (26)(12) = 312
Obtaining the percent by mass of carbon,
                           % by mass of carbon = (312/446) x 100 % 
                                                                 = 69.955%
Thus, the percent by mass of carbon in hydrocortisone valerate is approximately 69.96%. 
8 0
2 years ago
Do you agree or disagree with the following statement:
Anarel [89]

Answer:

Agree

Explanation:

Theories are refined and then become laws and laws are somehow more important than theories. In science actually what a law is, is a descriptive generalization. So we talk about the laws of thermodynamics that tell you about heat under different circumstances.

5 0
2 years ago
Which of the following statements is true for all eukarya?
sammy [17]

Answer:

A. their cells contain a nucleus

Explanation:

hope it helps

please mark me as a brainliest

6 0
3 years ago
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