Which of these is an example of a reversible physical change? A. boiling water B. breaking glass C. cracking an egg D. splitting a diamond

What is the nature of the ca-cl bond in a molecule of calcium chloride (cacl2) if the electronegativity value of calcium is 1.0 and that of chlorine is 3.16?

What is the average rate of the reaction between 10 and 20 s?

Achemist who studies water samples did a demonstration of how to test for lead in water. she added a clear solution of potassium iodide to a clear solution of lead nitrate. then a yellow swirling solid formed in the liquid. what is most likely true about the yellow solid?