The substances present before a chemical reaction takes place are called?

How is science different from other forms of human endeavor? a. Science is the only human endeavor that requires thought. BThe goal of science is to explain art and history. CScience is no different from any other human endeavor.

The atomic particles responsible for forming bonds with other atoms are

4. What is free energy?

2C (s) + 2H2 (g) → C2H4 (g) : ΔH = + 52.4 kJ/mol Which statement about this reaction is correct?

An unknown substance has a volume of 2 cm and a mass of 38.6 grams what is the density

For a chemical reaction to be spontaneous at all temperatures, which of the following conditions must be met? a. ΔS° > 0, ΔH° > 0 b. ΔS° > 0, ΔH° < 0 c. ΔS° < 0, ΔH° < 0 d. ΔS° 0 e.

What is a Binary Compound? Is it related to the Ionic and Molecular compounds? if so, how so?

Which answer correctly describes the difference between covalent and ionic bonds? A. ionic: transfer of protons covalent: transfer of electrons B. ionic: transfer of electrons covalent: transfer of protons C.

What are the first five elementsof the periodic table?

Name 3 characteristics that can be used to identify minerals