Answer:
B)
Explanation:
because the wind is moving the sand and the rain moves the soil
16) weathering and erosion
The correct option is B.
Phenophtalein is an indicator that is usually used in acid base titration experiments. Indicators are substances that undergo distinct, observable changes when the pH of their solutions change. Indicators exhibit changing of colors depending on the pH of the solution in which they are found. They are usually weak bases and acid which are capable of partial dissociation and formation of ions when dissolved in water. There are different types of indicator and phenophtalein is one of them. Phenophtalein is colorless in acidic solution and pink in basic solutions.
The structural formula of carbon is as shown below. Carbon is a nonmetallic and tetravalent compound that can accommodate 4 electrons to form a covalent bond. It has the capacity to establish bonds easily with other atoms and with other carbon atoms too, carbon is competent of establishing multiple stable covalent bonds with suitable multivalent atoms.
Chemical formula = 
Boyle's Law: The relationship between a gas' volume and pressure, where the temperature is assumed to be constant. The relationship is an inverse one and the formula is P₁V₁ = P₂V₂
Charles' Law: The relationship between a gas' volume and temperature, where pressure is assumed to be constant. The relationship is a linear one and the formula is V₁ ÷ T₁ = V₂ ÷ T₂.
Gay-Lussac's Law: The relationship between temperature and pressure, where volume is assumed to be constant. The relationship is a linear one and the formula is P₁ ÷ T₁ = P₂ ÷ T₂.
Combined Law: Boyle's, Charles', and Gay-Lussac's laws all combined, where all the variables are changing. I'm unsure of what the relationship is but the formula is P₁V₁/T₁ = P₂V₂/T₂.
*Note: The subscripts just indicate the original amount to the new amounts.
I guess it is A and i think i m correct
