Answer:
A.
Explanation:
It would be A. because the question is asking how the harmful chemicals have an effect on the environment. This answer also proves that even though we don't mean to harm the environment it still happens because we are using these chemicals for things in our daily life.
when the top of the pencil moves in one direction, the bottom end on the ground will move in another, but due to the frictional force it will move by a lesser amount, and the center of mass of the pencil will be accelerated in the horizontal direction due to the force of friction
the equation balanced is
3 PbI4 + 4 CrCl3 → 3 PbCl4 + 4 CrI3
When two or more atoms chemically bond together, they form a molecule (O3). When atoms of at least two different elements come together to form chemical bonds, these molecules can be called compounds (NaCl). A pure substance consists of a single element or compound. For example, Iron is formed only of Iron (Fe) atoms; table salt is formed only by sodium chloride (NaCl) molecules.
Answer:number 2
Explanation:
the definition of photosynthesis is that carbon dioxide and water changes into sugar and oxygen
