Which of the data sets qualitative data?

What does x represent in the formula for the compound xcl4?

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?

Consider the following reaction at equilibrium. 2co2 (g) 2co (g) + o2 (g) h° = -514 kj le châtelier's principle predicts that the equilibrium partial pressure of co (g) can be maximized by carrying out the reaction a. at high temperature and high pressure b. at high temperature and low pressure c. at low temperature and low pressure d. at low temperature and high pressure e. in the presence of solid carbon