The energy exchanges between space,the atmosphere and the Earth surface produce Weather and Climate
Answer: 1. magnesium hydroxide + sulfuric acid = magnesium sulphate + water
2. calcium hydroxide + hydrochloric acid = calcium chloride + water
3. lead hydroxide + nitric acid = lead nitrate + water
4. sodium hydroxide + sulfuric acid = sodium sulphate + water
5. potassium hydroxide + citric acid = potassium citrate + water
6. silver hydroxide + hydrochloric acid = silver chloride + water
7. aluminium hydroxide + phosphoric acid = aluminium phosphate + water
Explanation:
A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.
The balanced chemical equations are :
1. magnesium hydroxide + sulfuric acid = magnesium sulphate + water
2. calcium hydroxide + hydrochloric acid = calcium chloride + water
3. lead hydroxide + nitric acid = lead nitrate + water
4. sodium hydroxide + sulfuric acid = sodium sulphate + water
5. potassium hydroxide + citric acid = potassium citrate + water
6. silver hydroxide + hydrochloric acid = silver chloride + water
7. aluminium hydroxide + phosphoric acid = aluminium phosphate + water
Answer:
pH = 4.7
Explanation:
The pH is a measurement of acidity using the concentration of hydrogen ions (H⁺) in a solution. Therefore, before you can find the pH, you need to determine the concentration (M) of H⁺ in the solution. This can be done by multiplying the molarity of the solution by the amount of H⁺ in the solution.
1 mole H₂SO₄ = 2 moles H⁺ and 1 mole SO₄⁻
1.0 x 10⁻⁵ M H₂SO₄ 2 moles H⁺
----------------------------- x ---------------------- = 2.0 x 10⁻⁵ M H⁺
1 mole H₂SO₄
To find the pH, you need to use the following equation:
pH = -log[H⁺]
Since you calculated the hydrogen concentration ([H⁺]) in the previous step, you can plug it into the equation and solve.
pH = -log[H⁺]
pH = -log[2.0 x 10⁻⁵]
pH = 4.7
Answer:
boiling water has no oxygen
Explanation:
you need water and oxygen for something to rust.
Answer:
3rd option - humans chose the potential parents for crosses based on desired characteristics.
Explanation:
Artificial selection is the identification by humans of desirable traits in plants and animals, and the steps taken to enhance and perpetuate those traits in future generations.