Explain how exotic frog trafficking might put people at risk?

Calcium metal (Ca) can be produced by passing an electric current through molten calcium chloride (CaCl2). Chlorine gas (Cl2) is also formed. What is the balanced equation for this reaction?

The accepted ΔH for a reaction is - 42.3 kJ/mol. A student has performed a lab experiment to determine the enthalpy change of the same reaction. Calculate the percent error Student 1 Exp. ΔH (kJ/mol) Trial 1 - 43.8 Trial 2 - 41.0 Trial 3 - 42.7

How do sediments form?

Which statements are true of precipitation reactions? Check all that apply. A. The new compounds are both liquids. B. Two substances form from one reactant. C. A solid forms. D. They are also double-replacement reactions.

What can you do to make the chicken egg float in the water? Explain your answer. (Science)

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

Given the equation representing a reaction: 2Ca (s) + O2 (g) → 2CaO (s) During this reaction, each element changes in 1) atomic number 2) oxidation number 3) number of protons per atom 4) number of neutrons per atom