Answer:
Independent: The amount of vinegar
Dependent: The dye result on the egg
Controlled: The type of eggs, the size of jars, the dye tablet, how much she stirs, etc.
Explanation:
The independent variable is what is being changed, which in this case, is the amount of vinegar being added to each jar. The dependent variable is what is being measured or observed. Kesha is looking for what happens to the egg when she adds more vinegar with the dye. Lastly, there could be a couple of controlled variables. Like, the dye tablet, the size and brand of the eggs, the types of jars, how long she stirs each egg, and so on. The controlled are just variables kept constant so that any result observed is because of one singular change, the independent variable.
The following are hazards of corrosion and rancidity;
1. There's reduction of efficiency of the metals.
2. It can lead to contamination especially in the pipes.
3. These can lead to financial losses brought by the destruction of metals.
4. It could result in pollution as a result of chemical reaction bringing about corrosion.
Balancing of the chemical reaction involves keeping the number of atoms of a certain element equal in both sides of the equation. For this item, the balanced chemical equation would be,
N2 + 3H2 --> 2NH3
The numerical coefficients are therefore 1 for N2, 3 for H2, and 2 for NH3. The sum of the numerical coefficients is 6.
<em>Answer: 6</em>