In mathematics, the notation n! represents the factorial of the nonnegativeinteger n. The factorial of n is the product of all the nonnegative integersfrom 1 to n. For example:7! = 1 x 2 x 3 x 4 x 5 x 6 x 7 = 5,040Write a program that lets the user enter a nonnegative integer and then usesa loop to calculate the factorial of that number. Print the factorial tostandard output.

answer: when the substance contain the two parts (polar and non-polar) like soap.

explanation:

soap is produced from the basic hydrolysis of ester "saponification", it is considered as a salt of hydrocarbons. the soap molecule contains the two parts: a polar group   (-coo-na+) and a non-polar group (r-hydrocarbon part). the polar group is called the head and the tail is the non-polar group. the polar group is hydrophilic in nature (water loving) and the non-polar group is hydrophobic in nature (water repelling).the polar/non-polar nature of a substance is useful that it can dissolve the non-polar substances by the polar part and also can dissolve the polar substances by the non-polar part. it commonly used in detergents and soaps.

Just trying to get some points : p sorry bro