Most of the coal found on Earth today was formed during the Carboniferous and Permian Periods. About how old could a piece of coal be?

What is the difference between how ionic and covalent bonds form

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

Diabetes is often suspected when glucose shows up in urine tests. use the model to explain how glucose could be present in urine. why do you think this symptom is especially concerning for young people?