Write a program that 1) clears the screen, 2) locates the cursor near the middle of the screen, 3) prompts the user for two integers, 4) adds the integers, and 5) displays their sum; all of the prompts and output line should be displays should be at the middle of the screen, line by line. Hint: Use the Gotoxy procedure from Irvine32.lib to locate the cursor on the screen; see PowerPoint slide

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.

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