Which process is a physical change?

iron rusting

milk turning to curd

water boiling

paper burning

hard water staining pipes

Consider the following metals: Ag, Au, Mg, Ni, and Zn. Which of these metals could be used as a sacrificial anode in the cathodic protection of an underground steel storage tank? Steel is mostly iron, so use - 0.

The atom having the valence shell configuration 3s2 3p3 would be: A. Group 3A, Period 5 B. Group 5A, Period 3 C. Group 7A, Period 4 D. Group 3A, Period 3

What combination of elements from a ionic bond

Which statement is true about a proton and an electron? (1) They have the same masses and the same charges. (2) They have the same masses and different charges. (3) They have different masses and the same charges.

The gases inside of a normal tire are usually measured when they are at ambient standard temperature (298 K) & under a controlled pressure of 32.

Difference between radical and compound

Water is a produced when 30.0 grams of hydrogen reacts with 80.0 grams of oxygen what is the limiting reagent

How are reactions and products related in a chemical reaction?

Ollie wants to sign up with an online social network called TeensMeet, which other kids at school have joined.

7. A perfect cube has a width of 2 cm. What is the cube's volume? Show your work!