Which of the following statements about x rays is incorrect? a. x rays darken photographic plates. b. x rays can penetrate soft body tissue. c. the kinetic energy of high speed electrons is converted to x rays when they collide with matter. d. x rays can easily penetrate bones and any thick material.

The correct answer is option d, that is, X rays can easily penetrate bones and any thick material.

Explanation:

The X-rays are the kind of radiation known as electromagnetic waves. The imaging by X-rays develops pictures of the body from inside. The images demonstrate the body parts in distinct shades of black and white. This is due to the fact that different tissues captivate different radiation concentrations. The X-rays possesses the tendency to pass through bones and any thick substance.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.