Basic English Rule on Singular and Plural Expressions of Noncount Nouns

List of Idiomatic Phrases
Though there are many rules in english on count--also categorized under mass nouns--and non-count nouns, students get confused especially while handling non-count nouns. Whether to add "s" at the end of the words or not? What is the plural word for non-count nouns? And so on. Here is a list of noncount nouns that always carry an idiomatic expression.
Memorize the following singular and plural idiomatic expressions examples
A piece of advice two pieces of advice
a piece of bread two pieces of bread
a piece of equipment two pieces of equipment
a piece of furniture two pieces of furniture
a piece of information two pieces of information
a piece of jewelry two pieces of jewelry
a piece of luggage two pieces of luggage
a piece of mail two pieces of mail
a piece of music two pieces of music
a piece of news two pieces of news
a piece of toast two pieces of toast
a loaf of bread two loaves of bread
a slice of bread two slices of bread
an ear of corn two ears of corn
a bar of soap two bars of soap
a bolt of lighting two bolts of lighting
a clap of thunder two claps of thunder
a gust of wind two gusts of wind
More example sentences that contain singular and plural expressions of noncount nouns:
Non-standard: A mail travels faster when the zip code is mentioned on the letter.
Standard: A piece of mail travels faster when the zip code is mentioned on the letter.
Non-standard: Is there a limit of two carry-on luggages for each passenger?
Standard: Is there a limit of two pieces of carry-on luggage for each passenger?
Non-standard: Each furniture in this showroom is imported from Tailand.
Standard: Each piece of furniture in this showroom is imported from Tailand.
Non-standard: I'd like a steak, a salad, and a corn's ear with butter.
Standard: I'd like a steak, a salad, and an ear of corn with butter.
Non-standard: The department of medicine purchased a new equipment to diagnose the cancer disease.
Standard: The department of medicine purchased a new piece of equipment to diagnose the cancer disease.
Non-standard: A pop song is a popular music.
Standard: A pop song is a piece of popular music.
Non-standard: I have two soaps.
Standard: I have two bars of soap.
Non-standard: Hybrids have one more corn per plant than the other varieties.
Standard: Hybrids have one more ear of corn per plant than the other varieties.
Non-standard: A wind blew on my car.
Standard: A gusts of wind blew on my car.
So, avoid using the noncount noun without the singular or plural idiom to express singular or plural.