The seven C's of communication are a list of principles for written and spoken communications to ensure that they are effective. The seven C's are: clarity, correctness, conciseness, courtesy, concreteness, consideration and completeness.
73Sheldon: "The best number is 73. Why? 73 is the 21st prime number. Its mirror, 37, is the 12th and its mirror, 21, is the product of multiplying 7 and 3."'"
Theoretically, cream of tartar can last indefinitely as long as it is protected from light, air, and moisture. But very few foods last forever. To be safe, cream of tartar has a shelf life of 5 years.