Which one of the following is not a balanced equation?

A. 2Ca (s) + O2 (g) → 2CaO (s)

B. Ca (s) + O2 (g) → CaO (s)

C. 2Li (s) + 2H2O (l) → 2LiH (aq) + H2 (g)

D. CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (g)

s it possible for a system to have negative potential energy? Is it possible for a system to have negative potential energy? No, because the kinetic energy of a system must equal its potential energy. Yes, as long as the total energy is positive.

2. The speed-time grapher an object at rest is a (n) line at y =

A 2 kg wagon is at rest on a sidewalk. How much gravitational force is acting on the wagon?

All galaxies follow the law of gravity. a. True b. False

Explain how metamorphic rocks are formed, and explain the differences between regional and contact metamorphism?

A boy on a bicycle is resting at the top of a hill then he rides his bicycle down the hill describe how the boy potential and kineti energy differ at the top middle and bottom of the him

What is the displacement and distance if I walk 8 blocks north, 9 blocks west and 10 blocks south

What investigations provide large amounts of information about a wide range of variables.

Why would Sodium (Na) and Chlorine (CI) want to form a lonic Bond? -to achieve a full inner valence shell -to achieve a equal amount of protons & electrons in their nucleus -to achieve an stable amount of protons & neutrons in their nucleus -to

A digital thermometer reads 15 degrees Celsius, what is the uncertainty?