A. True
They are formed behind an obstacle when the wind blows the sand up to it.
Answer:
138g/mol
Explanation:
K₂CO₃ is also known as potassium carbonate. It has a molar mass of around 138.21 g/mol (138.2055 g/mol to be exact).
Answer:
i promise you it's b
Explanation:
its not a or d because gasses are on the right side, its not d because metals are not brittle, and it's not c because theyre good conducters not insulators
Answer: Option B
Explanation:
Cell membrane can be defined as the outermost covering of the cell which allows the movement of particles across membrane. The particles are allowed to move from inside of the cell to the outside of the cell and from outside to inside of the cell.
This kind of a membrane is known as selectively permeable which allows the movement of certain molecules only.
hence, the correct answer is option B
