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Radiation, because heat travels in all directions Convection, and heat travels in all directions Conduction, and it also heat travels from hot to cold Radiation, because heat travels from cold to hot.
Soil erosion will decrease because the heated soil absorbs less water.
Answer:
H₃PO₄ → 3H⁺ + PO₄³⁻
CaSO₄ → Ca²⁺ + SO₄²⁻
b. CaCl₂
Explanation:
When H₃PO₄ is dissolved in water, there are produced the H⁺ and PO₄³⁻ ions. The equation is:
H₃PO₄ → 3H⁺ + PO₄³⁻
In the same way, CaSO₄ is dissolved in:
CaSO₄ → Ca²⁺ + SO₄²⁻
b. Now, in a reaction of an acid (HCl) and a base (Ca(OH)₂), water, H₂O and a salt are produced:
2 HCl + Ca(OH)₂ → 2H₂O + Salt
The ions that are not present in the reaction are Cl⁻ and Ca²⁺, the salt is CaCl₂ and the balanced reaction is:
2 HCl + Ca(OH)₂ → 2H₂O + CaCl₂
Answer:
On the farm there are 70 chickens.
Explanation:
We can directly <u>work out the number of ducks from the given number of pigs</u>, with the <em>ratio of ducks to pigs</em>:
- 36 pigs *
= 20 ducks
Then we<u> work out the number of chickens</u>, using the ration of chickens to ducks:
- 20 ducks *
= 70 chickens
If on the farm there are 36 pigs, there are 70 chickens as well.
