What is the difference between the chemical formulas PB and Pb

What physical property of an element determines whether it acquires a positive or negative partial charge when participating in a polar covalent bond?

The law of conservation of mass tells us, in part, that matter is neither created nor destroyed. How can we see this by using chemical reaction?

Under which conditions will sugar most likely dissolve fastest in a cup of water? a a sugar cube with stirring at 5°C b a sugar cube without stirring at 15°C c sugar crystals without stirring at 5°C d sugar crystals with stirring at 15°C

The energy transfer between the system and the surroundings, in the form of heat at constant pressure is described by which of the following symbols? A. ΔS B. ΔG C. ΔT D. ΔH

6. Given the following incomplete reaction: CaBr2 + 2Li → Ca + List the elements (including how many of each element) that would have to be present in the compound represented by the blank in order to demonstrate conservation of mass?

Identify the property of magma that causes it to be forced upward towards earth's surface.

Classify each of these compounds as a Brønsted-Lowry acid, a Brønsted-Lowry base, or neither. Drag each item to the appropriate bin. are these a Brønsted-Lowry acid or a Brønsted-Lowry base H2SO4, HNO2, (CH3) 3N, C3H7NH2, HF, NH3, NaBr, CCl4

If you dissolve sugar into water in a small jar, will the result be a mixture, a solution or both? Explain.

Convert the following energy units. 635 kJ to J

What is the element K2SO4 and is it ionic, covalent or polyatomic