R it answe know it dont If you dont

Fill in the blank: The number of molecules in a chemical reaction are indicated by the

The on the left side of an equation must be balanced with the atoms on the right side of the equation.
Question 2 options:

total number of molecules

total number of atoms

total number of compounds

free electrons

What happens in a covalent bond between atoms?
Question 3 options:

each atom shares electrons so that they are both stable

electrons are lost by one atom and gained by the other

the smaller atom’s neutrons repel the electrons

the electrons flow in an electric current away from the bonded pair of atoms

(4) Fill in the blank: What is the correct name for the ionic compound Ca2P5?

What does a chemical change always result in?
Question 5 options:

precipitate

new reactant

increased activation energy

new substance

Metals tend to electrons and become .
Question 6 options:

lose, anions

lose, cations

gain, anions

gain, cations

How many valence electrons do most atoms need to have in their outer shell to be most stable?
Question 7 options:

8

1

4

6

The organelle pictured is found in cells of and is theorized to have once been an independent organism.

{answer found. it's (3 ) }which statement describes the cell cycle? (1)the cell cycle is a process in which one cell divides into four genetically different cells. (2)the cell cycle is a process in which one cell divides into two genetically different cells. (3)the cell cycle is a process in which one cell divides into two genetically identical cells. (4)the cell cycle is a process in which one cell divides into four genetically identical cells.

Rease is an enzyme used by plants to break down urea (a nitrogen-containing compound) into carbon dioxide and ammonia. urease urea > > > carbon dioxide and ammonia ammonia is broken down by plants into a nitrogen source plants need to grow. thus, plants could not use urea as a nitrogen source unless it was first converted to ammonia. in soybean plants there are two different kinds of urease, one produced in the seeds and the other produced in the leaves of the plant. three types of soybean plants were used in a set of experiments: normal soybeans and two mutant strains, one lacking the urease in the seeds only (strain 1) and one lacking urease in the leaves only (strain 2). experiment 1 separate areas in a field were planted with normal, strain 1, and strain 2 soybeans. all types of soybeans appeared to grow, flower, and produce seeds equally well. there were no externally detectable differences among the strains. experiment 2 small pieces of plant leaves of equal weight were obtained from each type of soybean plant and separately placed on media in culture dishes. tissue growing in this way will become an unorganized clump of cells referred to as callus. to provide a controlled nitrogen source, half the tissue samples of each type were placed on media containing urea, and the other half of the samples were placed on media containing ammonia. after 30 days, the weight gain for each of the callus samples was determined. results are shown in the table below.