Rocket engines can be fueled by liquid hydrogen. The liquid hydrogen reacts with liquid oxygen, producing water vapor and releasing an enormous amount of energy. Consider the following reaction:
2 molecules of hydrogen (H2) react with 1 molecule of oxygen (O2) to produce some amount of water (H2O).

To find the amount of water produced, first determine the number of each type of atom in the products.

Hint: During a chemical reaction, atoms are not created, destroyed, or changed from one chemical element to another.

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.

since electrons are negative the answer is neagtaive

rosa was looking for patterns to predict the products of chemical reactions. she recorded three similar decomposition reactions in the table.she should record 2licl + 3o2.

in the last row of the table. it is the thermal decomposition of chlorate lithium, hence, she should record these products as: lithium chloride ( 2licl ) and oxygen ( 3o2 )   2 > 2 licl + 3o2.