Question

calculate the total number of each atom in 5k₂cr₂o₇. k type your answer... cr type your answer... o type your answer...

Explanation:

Step1: Calculate the number of K atoms

The formula is \(5K_2Cr_2O_7\). For potassium (\(K\)), in one \(K_2Cr_2O_7\) unit, there are \(2\) \(K\) atoms. With a coefficient of \(5\), the number of \(K\) atoms is \(5\times2=10\).

Step2: Calculate the number of Cr atoms

For chromium (\(Cr\)), in one \(K_2Cr_2O_7\) unit, there are \(2\) \(Cr\) atoms. Using the coefficient \(5\), the number of \(Cr\) atoms is \(5\times 2=10\).

Step3: Calculate the number of O atoms

For oxygen (\(O\)), in one \(K_2Cr_2O_7\) unit, there are \(7\) \(O\) atoms. With the coefficient \(5\), the number of \(O\) atoms is \(5\times7 = 35\).

Answer:

K: \(10\), Cr: \(10\), O: \(35\)