Answer:
it is a reaction whereby one or more reactants of the reaction are changed or replaced .
Both substances are definitely y physical if they are both changing
Density = mass/ volume
d= 53.405 / 15.75
d= 3.390g/ml
Answer:
The equation is balanced
Explanation:
Before a equation can be said to be balanced the number of mole at the reaction side must be equal to number mole at the product side
Let's start with Zn at the reactant side 4 moles of Zn reacts and 4 moles of Zn was obtained from the product side which makes it balanced
Let's take HNO3
For H,10 moles react and 10 moles was obtained in the product side
For N,10 moles react and 8 moles was obtained initially and 2 moles was obtained as well which makes it 10 moles and it makes it balanced
For O,30 moles react and after calculating the total amount of O at the product side it was observed to be 30 which indicates that the equation is balanced...
The equation is absolutely well balanced
Answer: 1) Adding fertilizers to soil
Explanation: Eutrophication is the presence of excess mineral and nutrients in water bodies which result into increased plant and algal growth.
Fertilizers containing nitrogen and phosphorus are used to make soil more fertile in farming. The overuse of fertilizers can cause these nutrients to runoff the farmer's fields and enter water bodies, thus leading to eutrophication.
