Uncountable nouns have only one form.

• Money, water, rice, coffee, and music cannot become monies, waters, rices, coffees and musics.

A and an are not used when using uncountable nouns.
The following are incorrect:

• "Do you have a money?"
• "I want a rice."
• "I am listening to a music."

The can be used with uncountable nouns.
The following are correct:

• Do you have the money? (You have set a specific sum of money aside to purchase something such as concert tickets.)
• The rice is in the fridge.
• Can you hear the music?

All uncountable nouns are written without the articles a and an; however you can say:

• I want a bowl of rice.
• Give me a cup of coffee.
• Could you play a piece of music?

* This can be done when using other types of measurement such as a cup of + noun or a plate of + noun.

Using some
Some is used with noncount nouns and plural (count) nouns:

• "I want some tea." (Tea is a noncount noun; you do not add an "s" to it.)
• "Do you want some money?" (Money is a noncount noun.)
• "I have some friends that might be interested." (Friend is a count noun, but it is already in its plural form.)