What are the coefficients that balance the following chemical equation. nh3 + o2 → no2 + h2o

4, 7, 4, 6

Explanation:

The law of conservation of mass states that in every chemical reaction, the mass of the reactant must be equal to the mass of the products: this means that the number of atoms of each element must be equal in the reactants and in the products.

If we choose the coefficients in this way:

4, 7, 4, 6

We see that the reaction becomes:

And we can verify that the number of atoms for each element in the reactants is equal to the product:

- Nitrogen (N): 4 atoms on the left, and 4 on the right

- Oxygen (O): 7 x 2 = 14 atoms on the left, 4 x 2 + 6 = 14 atoms on the right

- Hydrogen (H): 4 x 3 = 12 atoms on the left, 6 x 2 = 12 atoms on the right

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.

answera compound;