contestada

The compound K2O2 also exists. A chemist can determine the mass of K in a sample of known mass that consists of either pure K2O or pure K2O2. From this information, can the chemist answer the question of which compound is in the sample? Indicate yes or no, and explain.

Respuesta :

Edufirst

Answer:

  • Yes, she can, because she can determine the empirical formula.

Explanation:

The empirical formula of K₂O₂ is KO, and the empirical formula of K₂O is K₂O.

The chemist, once determined the mass of K in a sample of known mass, can calculate the mass of O by difference.

Once she has both masses she can determine the number of moles, using the atomic mass of each element.

Once she has the number of moles, she can determine the ratio of K moles to O moles, which tells the subscripts of the empirical formula.

Then, she will know whether the compound is KO (K₂O₂) or K₂O.

From this information, the chemist can answer the question of which compound is in the sample because she can find the empirical formula. Therefore, the option is yes.

  • The empirical formula of a chemical compound simply means the simplest positive integer ratio of the atoms that are present in such compound. For example, the empirical formula of K₂O₂ is given as KO,  while that of K₂O is K₂O.

  • In a scenario whereby the masses have been gotten by the chemist in the sample of the known mass, then she can then be able to determine the number of moles, by using atomic mass of the element.  Then, the ratio of K moles to O moles can be gotten

In conclusion she can then get the compound in the sample whether it is KO, (K₂O₂) or K₂O.

Read related link on:

https://brainly.com/question/14854985

 

Otras preguntas