A simple basic yuan coin weighs about 6.1 grams, but there are different kinds & editions so the weights may vary, exg a yuan made of gold will be much heavier than one made of silver, which in turn is heavier than one made of nickle.
They taxed the colonies without their consent. Not only that, but the colonists had no opinion in the parliament, making it seem so unfair. And it was. Also, the colonists didn't like the laws passed on by the parliament. For example, the Stamp Act and the Quartering Act, which they rebelled against.
It's two, because inventions didn't make anything difficult, I think they made life easier, to create things. And inventions did lead to the Industrial Revolution. inventions back then also created jobs for people.
A writing a novel called The Jungle