Answer:
The correct answer is d. As the chocolate bar changes from a solid to a liquid the particles move around more.
Explanation:
When a chocolate bar melts, it suffers a <u>physical</u> change: a change of state from solid to liquid. In the liquid state, the particles move around more, because they have more kinetic energy (more velocity) and more freedom to move than in solid state. Thus, as the solid became into a liquid, the particles move more.
Answer:
chloroplast, more precisely in the stroma of the chloroplast
Explanation:
Chloroplasts are a type of chromoplasts that are located in photosynthetic plant cells and green algae.
They can be moved by amoeboid and contractile movements, and placed in the part of the cell that receives the most light. Photosynthetic algae usually have a large chloroplast, but plant cells have a few tens.
The internal medium of the chloroplast is called stroma, and it is composed of a solution of carbohydrates, lipids, protids, nucleic acids, pigments, nucleotides, salts and elements.
Its main function is to capture the light energy and use it in the synthesis of organic matter.
K, ca, sc is the right answer. Take a look at table S of your chemistry reference table.
Answer:
True
Explanation:
To begin with,
Hydrogen bonds are attractions that contain a force caused by the difference in charge. This is due to the positive hydrogen ions as well as slightly negative ions. Therefore, hydrogen bonds make water molecules 'sticky.' To add, the attractions between hydrogen bonds are weaker than ionic and covalent bonds but strong enough to cause them to 'stick together'
Hope this helps.
