3.A temperatura é um fator que pode alterar a velocidade das reações químicas? A) sim
B) sempre
C) não
D) nunca

Five students had to answer the question how are elements arranged in a periodic tabledamon: i think the elements are arranged by increasing massflo: i think the elements are arranged according to their properties sienna: i think the elements are arranged by when their discovers kyle: i think the elements are arranged according to how common they areglenda: i don't agree with any of themwho is right

Pbco3 –> pbo+ co2. how many liters of carbon dioxide gas is produced from the decomposition of 32 grams of lead (ll) carbonate?

If 1.63 times 10 negative 4 of helium dissolves in 100.0g of water, what is the concentration in parts per million