Why are experimental investigations the best type of scientific investigation to demonstrate cause-and-effect relationships?

When new compounds are formed, what type of change has taken place? physical phase form chemical

Under the gold standard, a country in balance-of-trade equilibrium earns income from exports that is equal to the money its residents pay for imports. Group of answer choices True False

Which of the following pairs of elements is most likely to form an ionic compound?1. Nitrogen and sulfur? OR 2. Magnesium and Fluorine?

Your town is at sea level, and it is a comfortable room- temperature day. The speed of sound in air at this temperature is about 343 m/s. If a siren from the firehouse takes 0.

The standard free energy of activation of a reaction A is Reaction B is ten million times faster than reaction A at the same temperature. The products of each reaction are 10.0 kJ mol-1 (2.39 kcal mol-1) more stable than the reactants.

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

Which of the following elements is released into the atmosphere by all of these processes: volcanic outgassing, animal respiration and flatulence, burning of fossil fuels, and metamorphism of limestone? a. Carbon. b. Nitrogen. c. Oxygen. d. Sulfur

A phase change from a solid to a gas is called what