According to the law of conservation of matter, we know that the total number of atoms does not change in a chemical reaction and thus mass is conserved. The reactant in this model is hydrogen peroxide Hydrogen peroxide decomposes to produce water and
oxygen gas. How many water molecules must be added to complete this model?
es)

Explanation:

H202 = H20 + O2

by balancing the this skeletal equation : he get

2H202 ( hydrogen peroxide) = 2H20( water) + O2 (oxygen)

so 1 more water molecules is needed to complete this model ..

interphase   is the cell cycle stage in which the cell acquires nutrients, creates and uses proteins and other molecules and starts the process of cell division by replicating the dna. it is the longest stage in the eukaryote cell cycle.

the following   can go wrong during interphase:   a base pair could be mismatched during the duplication process causing a mutation.   correct answer: c

explanation: