Which of the following is a physical change?

-Burning

-Rusting

-Freezing

-Oxidation

Joseph divides 8.64 by 2

Which unit of pressure expresses standard atmospheric pressure as 1?

A sample of a substance that has a density of 0.844 g/mL has a mass of 0.549 g. Calculate the volume of the sample.

Over-encouraging lesser skilled players can lead to embarrassment. a. True b. False

Which species can conduct an electric current? 1) NaOH 2) NaCl 3) H2O 4) HCl

How does temperature affect molecules

The color of Benedictâs solution is blue. What color does it change to in high sugar concentration?

What functional groups of the emulsifying agent provide the hydrophilic character? Do these groups affect the pH?

Which element has atoms that can form single, double, and triplecovalent bonds with other atoms of the same element? (1) hydrogen (3) fluorine (2) oxygen (4) carbon

Which of the following statements best describes the basic structure of an atom? Electrons and protons are in motion around a nucleus that contains neutrons Neutrons are in motion around a nucleus that contains protons and electrons Protons are in