About determiners

Much is used with uncountable nouns, with unknown quantities, especially in the interrogative and negative form

There are much factories in the world (Hay muchas fábricas en el mundo)

how many con cosas contables.

How many friends do you have?” (¿Cuántos amigos tienes?)

how much is used with countless things

How much money do you have?” (¿Cuánto dinero tienes?)

It is an expression that can be used interchangeably instead

I’ve a lot of pending work.(Tengo mucho trabajo pendiente).

Is used when the next word begins with the sound of a consonant

A girl walks to school. (Una chica camina hacia el colegio.)

When the next word begins with the sound of a vowel.

He buys a computer. (Compra una computadora.)

used in negative and interrogative sentences, with countable plural nouns and uncountable nouns

I don’t have any money. (No tengo dinero.)

used in affirmative sentences and with countable plural nouns and uncountable nouns

I need to buy some books. (Necesito comprar algunos libros.)

It is used with plural nouns and with quantities that are known or can be quickly determined..

We go to school many days. (Vamos a la escuela muchos días a la semana)