How do you know if a equation is balanced or unbalanced

What is the speed of a cheetah that travels 224 m in 8 Seconds

Does putting something in boiling water disinfect it

How many protons, electrons, and neutrons does an atom with atomic number of 47 and mass number of 108?

Which tool is more accurate for measuring liquid a) erlenmeyer flask b) graduated cylinder c) beaker

According to the law of demand an increase in the price of gasoline will: A. increase the quantity demanded of gasoline, other things constant. B. decrease the quantity demanded of gasoline, other things constant. C. increase the demand for gasoline.

Student follow up The ionic equation for the reaction between zinc and sulfuric acid is. Zn (s) + 2H (aq) - - Zn" (aq) + H2 (g) a State what has been oxidised in this reaction. Explain your answer in terms of electrons.

What kind of group 1 atoms are the most reactive? a. Small atoms c. Atoms with the most electrons in the valence level b. Large atoms d. Atoms at the top of the periodic table

What does it mean when there are 2.3 x 10-4 moles?

Electric force is an A. attraction and repulsion between protons and electrons . B. attraction and repulsion between protons and neutrons. C. attraction and repulsion between neutrons and electrons.

A salt crystal has a mass of 0.18 mg. how many nacl formula units does it contain?