Ammonia rapidly reacts with hydrogen chloride, making ammonium chloride. calculate the number of grams of excess reactant when 6.91 g of nh3 reacts with 4.61 g of hcl.

Given:

Ammonia

Hydrochloric acid

To find:

The amount excess of reactant left over in ammonia.

Solution:

Ammonia reacts rapidly with hydrochloric acid to form Ammonium Chloride

Equation for the above statement is derived as:

One gram per mole of ammonia

Similarly for 6.91g of

One gram per mole of hydrochloric acid

Similarly for 4.61g of

From the above information we can say that h c l is a limiting reactant.

Limiting reactant is an element that consumes lesser product in a chemical reaction.

Thus the amount of excess reactant is calculated by using the following formula

Amount of excess reactant left over in

Result:

Amount of excess reactant left over ammonia

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

c.

explanation: