the gold object being tested is scraped on the touchstone. Then, acid is poured onto the streak. why do you think that he more gas bubbles he streak produces, the lower the purity of the gold?

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax

What type of matter is made of only one kind of atom