Write the correct formula for the compound formed by each of the following pairs of ions. 1.) ni^2+, so4^2- 2.) al^3+, o^2- 3.) ca^2, clo3- 4.) nh4+, p^3- 5.) cu+, no3-

1.) NiSO₄; 2.) Al₂O₃; 3.) Ca(ClO₃)₂; 4.) (NH₄)₃P; 5.) CuNO₃

 Step-by-step explanation:

We can use the criss-cross method to work out the formulas. The steps are

If we use this method, the formula for the compound formed from Na⁺, SO₃²⁻ becomes Na₂SO₃.

1.) Ni²⁺ +  SO₄²⁻  ⟶ Ni₂(SO₄)₂ ⟶ NiSO₄

2.) Al³⁺ +  O²⁻     ⟶  Al₂O₃

3.) Ca²⁺ + ClO₃⁻ ⟶ Ca(ClO₃)₂  

4.) NH₄⁺ + P³⁻    ⟶ (NH₄)₃P  

5.) Cu⁺ + NO₃⁻   ⟶ CuNO₃

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .