Question

Відносна молекулярна маса оксиду елементу з групи головної підгрупи= 278. Визначте елемент та запишіть його назву

Answer 1

R2O3

M(O3)=16*3=48

M(R)=(278-48)/2=115

R=In--індій

Answer 2

Element with a Relative Molecular Mass of 278

The element with a relative molecular mass of 278 cannot be determined based on the information provided. The search results do not provide any specific information about an element with a relative molecular mass of 278. It is important to note that the relative molecular mass of an element or compound is calculated by summing the atomic masses of all the atoms in its chemical formula. Without additional information, it is not possible to determine the specific element or compound in question.

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