1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
skad [1K]
2 years ago
12

Which of the following is an inner transition element?

Chemistry
1 answer:
KiRa [710]2 years ago
4 0

Option E) Th is correct answer. Thorium (Th) is inner transition element.

  • The components that make up the f-block are those where the 4f and 5f orbitals gradually fill up.
  • Although they are officially members of group 3, these elements are displayed separately in the f-block of the periodic table. Inner transition elements are another name for the f-constituent block's parts.
  • Lanthanoids and actinoids are the names for the two series of inner transition elements that are 4f and 5f series, respectively.
  • The inner transition elements U, Th, and Pa are excellent nuclear energy sources.
  • The inner transition elements' electronic configuration is 4f1-14 5d0-16 s².
  • Due to their uniform size and outer shell design, elements in a series would all have comparable qualities, making it difficult to distinguish them from one another.

Hence, thorium is inner transition element.

Learn more about lanthanoids here:

brainly.com/question/13760918

#SPJ9

You might be interested in
What evidence in Side View lets you know that upwelling is happening in these locations?
mojhsa [17]

Answer:

Image result for What evidence in Side View lets you know that upwelling is happening in these locations?

Winds blowing across the ocean surface often push water away from an area. When this occurs, water rises up from beneath the surface to replace the diverging surface water. This process is known as upwelling.

Explanation:

4 0
3 years ago
Scientists think the earth is approximately _____ years old.
diamong [38]

Answer is 4 ½ billion.

Scientists think the earth's age is 4 ½ billion. This calculation is based on the radioactive dating. Since the formation of the earth, the time period has been divided into 3 major geological time periods as eon. They are phanerozoic, proterozoic and archean.

4 0
3 years ago
Read 2 more answers
Assume that some protein molecule, in its folded native state, has one favored conformation. But when it is denatured, it become
san4es73 [151]

Answer:

Gibbs Free Energy is given by the next equation: ΔG = ΔH - TΔS, where

ΔH - <u>change</u> in enthalpy

T - temperature in Kelvin

ΔS - <u>change</u> in entropy

ΔG can be:

  • ΔG>0 positive(not spontaneous reaction)
  • ΔG<0 negative(spontaneous reaction)
  • ΔG=0(in equilibrium).

→ When the proteins are denatured, the entropy of the system increases. Therefore, the ΔS also increases and becomes more positive.  

→ From the equation we see that positive value of ΔS contributes to negative value of ΔG.

The proteins are stable when there is no spontaneous reaction, thus, the ΔG>0 is required. Which means that ΔH has to be large and positive to counteract the influence of ΔS.

3 0
4 years ago
When 91.5 g of isopropyl alcohol which has an empirical formula of C3H8O is burned in excess oxygen gas, how many grams of H2O a
Snowcat [4.5K]

Answer:

  • <u><em>Last choice: 109.729 g</em></u>

Explanation:

This is a combustion reaction. The complete combustion of a hydrocarbon produces carbon dioxide and water.

The combustion reaction of<em> isopropyl alcohol</em> is represented by the balanced hemical equation:

            2C_3H_8O+9O_2\rightarrow 6CO_2+8H_2O

Thus, 2 moles of C_3H_8O produce 8 moles of H_2O.

<u>1. Convert the 91.5 g of isopropyl alcohol into number of moles</u>

  • Number of moles = molar mass / fomula mass

  • Formula mass

 3\times 12.011g/mol+8\times 1.00794g/mol+1\times 15.9994g/mol=60.09592g/mol

  • Number of moles = 91.5g / (60.95592g/mol) = 1.52256692 mol

<u>2. Calculate the the number of moles of water produced using the mole ratio:</u>

         \dfrac{8molH_2O}{2molC_3H_8O}\times 1.52256692molC_3H_8O=6.0902637molH_2O

<u />

<u>3. Convert to mass of water</u>

  • Mass = number of moles × molar mass
  • Molar mass = 2 × 1.00794 g/mol + 15.9994g/mol = 18.01528‬g/mol
  • Mass = 6.0902637 mol × 18.01528 g/mol = 109.717806g ≈ 109.72 g

So far, I have kept a large number of digits because these are intermediate calculations.

You should report the result with 3 significant figures, but all the answer choices contain more than that.

The last choice, 109.729, is the closest to the correct value.

8 0
4 years ago
Which organism is part of the Protista Kingdom? <br> A. E. coli B. Amoeba C. Yeast
Anuta_ua [19.1K]
The answer is A. Ecoli 
6 0
4 years ago
Other questions:
  • How many total atoms are in 0.170 g of p2o5?
    12·1 answer
  • Which is an example of the practical pursuit of alchemy
    15·1 answer
  • The percent by mass of nitrogen in NH4NO3 is closet to:<br> A) 15%<br> B) 20%<br> C) 35%<br> D) 60%
    9·2 answers
  • Treatment of 1 mole of dimethyl sulfate with 2 moles of sodium acetylide results in the formation of propyne as the major produc
    13·1 answer
  • Water can be formed in the following reaction:
    7·1 answer
  • A student mixes baking soda and vinegar in a glass.Do you think any new substances are being created in this mixture? If so, how
    11·1 answer
  • What is the name of Cr2S3
    13·1 answer
  • Catalyst
    14·1 answer
  • Please help me with my question ​
    11·2 answers
  • What is the element for gas
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!