What is the atomic number of an element determined by?

Is hydrogen peroxide the same thing as rubbing alcohol

What type of substance would salt water be classified as? Select all that apply. A. heterogeneous mixture B. homogeneous mixture C. colloid D. solution E. suspension

What is the molar mass of ace tic acid

Elemental boron can be formed by reaction of boron trichloride with hydrogen. BCl3 (g) + 1.5H2 (g) - > B (s) + 3HCl (g) Substance: BCl3 (g) H2 (g) B (s) HCl (g) S° (J/K•mol) : ? 130.6 5.87 186.8 If? S° = 80.3 J/K, what is S° for BCl3 (g) ?

Which of the following gases are typically used for colorful lighting when an electric current is applied? A) hydrogen and helium B) argon and krypton C) fluorine and chlorine D) oxygen and nitrogen

What does it mean for data to be continuous?

When an acid reacts with a base what compounds are formed? a. a salt only. b. water only. c. a salt and water. d. metal oxides only.?

What is the differences between River system, Tributary?

having that coloration is selected for since many predators will recognize it and stay away. Therefore the common coloration is beneficial to the butterflies and becomes more common. What type of selection is involved?

What organisms appeared on Earth First? a). gastropods b). horn corals c). brachiopods d). crinoids