cho cho 8,4 gam sắt tác dụng với dung dịch HCl loãng vừa đủ a Tính thể tích H2 thoát ra b Tính khối lượng muối thu được sau phản ứng C nếu dùng hết 200 mol dung dịch HCl thì nồng độ HCl là bao nhiêu

no but i do not usually comment or use my voice that much when it comes to social media

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.

you gotta add the following molecules so we can give u an answer

explanation: