Which process is a physical change?

iron rusting

milk turning to curd

water boiling

paper burning

hard water staining pipes

Which statements describe phase changes? Check all that apply. Particles in a liquid need to move more slowly in order to freeze. Attractive forces overcome the motion of particles when a solid sublimes.

What types of elements are involved in ionic bonding

Which ingredient tears latex balloons

A student is studying the equilibrium described by the equation: blue + 4 Br (aqjs green + 6H20 (1) a) The system is at equilibrium and has a blue color. The student added several crystals of sodium bromide (NaBr) to this blue equilibrium solution.

If glucose is the sole energy source, what fraction of the carbon dioxide exhaled by animals is generated only by the reactions involved in oxidation of pyruvate to acetyl coa?

What is the velocity of a wave with a frequency of 77 Hz and a wavelength of 200 m?

For the reaction: n2 (g) + 3h2 (g) ⇔ 2nh3 (g), at a particular temperature, the concentrations of n2, h2 and nh3 are 2.1 x 10-3 m, 3.2 x 10-2 m, and 1.8 x 10-1 m, respectively. calculate a value of k for this reaction

Empirical formula for 6. 63.52% Fe, 36.48% S

Name the term used for the configuration of a stereoisomer having R groups whose positions alternate from one side to the other side along the backbone chain.

Under the Implied Consent law, which of the following is true? A. Your driving privileges will be suspended if you refuse a chemical test to measure your alcohol level. B.