A solution is when a solute is added to a water solvent. Since water is neutral, the charge of the said solution is dictated by the charge of the ion. This is the subscript of the element. If it is not stated, then we use the common ion form.
1. H: The charge for hydrogen ion is +1.
2. OH⁻: The charge is ⁻1.
3. Mg2: This ion has a charge of +2.
4. HSO₄⁻: -1
5. SO₄²⁻: -2
6. Mg(HSO₄): This is not an ion, but an undissociated compound. So, it has a neutral charge of 7.
7. Mg(OH): Neutral at pH 7
8. Na: Sodium ion has a charge of +1.
9. NO₃⁻: -1.
Answer:
Explanation:
Given parameters:
Density of cobalt = 8.9gcm⁻³
Mass of cobalt = 17.8g
Solution
Density can be defined as the mass per unit volume of a substance:
Density = 
The unknown in the problem is Volume:
Volume = 
Volume = 
= 2cm³
Discuss the different observations that you would record during an investigation into the energy transformations of a lamp that uses electrical energy.
Answer:
I think that is called oxalic acid
Explanation:
