Câu 6. (1,5 điểm) Hỗn hợp X gồm MgO và Fe2O3. Hòa tan hết 7,2 gam hỗn hợp X cần vừa đủ 200 ml
dung dịch HCl 1,5M .Mặt khác, dẫn luồng khí CO dư qua 0,18 mol hỗn hợp X khi phản
ứng xảy ra hoàn toàn thu được chất rắn Y. Tính % khối lượng từng chất trong Y

The number at the end of an isotope’s name is the number.

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?