Question

If a ball takes n seconds when it moves with a speed 5 m/s to cover a distance of 10km .

Hn+ On --> H2O find n and balance the equation.

EXPLAIN IT WELL

Answer 1

Hii friend,

We know that formula,

Velocity= Distance/time

time= Distance/velocity

time= 10/5

Time= 2seconds.

The value of n in the equation is 2.

H2+ O2->H2O

Though the equation is not balanced, in order to balance it the oxygen compound becomes single element.

:-H2+1/2O2->H2O

where 1/2O2=> O.

or it can be directly balanced in the molecule state as ,

2H2+O2=> 2H2O

Hope this helps you a little!!!

Answer 2

It's a good installed question combining both physics and chemistry.

Here, A ball moves with speed of 5m/s and has to cover 10m in seconds.

we know that;

Distance = speed * time

=> 10 = 5 * n

=> n = 2 .

Now substituting n in the given chemical reaction equation.

$h _{n} + o_{n} = > h _{2}o \\ h _{2} + o_{2} = > h _{2}o \\ \\ now \: we \: shall \: balance \: equation$

We have 2 oxygens in reactants and one in products ; so multiply by 2 in products

We have 2 hydrogens in reactants and 4 in products so multiplying h2 by 2 .

The final balanced equation is

$2h _{2} + o_{2} = > 2h _{2}o$

and value of n = 2