Hi dear Kiara, and welcome
As a suggestion, I think you can simply check the correlation between the total scores of the two tests. This can show you whether by increasing the total score of emotion, the score of "organizational commitment" increases? It needs a simple correlation test.
Also it is possible to check the correlation between each question of each group with each question of the other group. Here you can have 21 x 150 tests which can be simple correlation, but I suggest that you can set each score of the 21 "organizational commitment" questions as a dependent variable in an ordinal regression model, and put the scores of the 150 "emotional" questions simultaneously as its independent variable.
But I would personally run the first test (a simple Spearman coefficient) because the latter will become too cluttering IMHO.