What would the products of a double-replacement reaction between ca3n2 and al2o3 be? a. caal and no b. cao and aln c. can and alo d. ca3o3 and al2n2

option B

In double displacement reaction, the reactants interchange ions to form new compounds. The one higher in reactivity series displaces the ions of other reactant and combines with it to form new compound.

The reaction would take place as the following:

The balanced reaction would be:

Hence, option B is the correct answer.

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.

what is the actual question though?