V/ READING Read part of a website article about computer technology. Write ONE suitable word in each space. In 1965, a computer engineer called Gordon Moore said, 'The number of items in a computer chip will double every year.' In other words, chips will become more and more powerful while, at the same time, becoming smaller and smaller. Ten years later, he changed the doubling time (21)_________________ every four years. For the next 45 years, his idea proved to be correct, so people now call it Moore's Law. Although some people say the speed of change (22)_. _________lower now, as a result of Moore's Law, the power of modern computers is unbelievable. One example will show this. Apollo 11 was the American spacecraft (23)_ took astronauts to the Moon and back able to do a lot of very in 1969. It is clear that the computer on this spacecraft (24)_____ difficult things. However, it had a lot less power than your present smartphone! Your phone has at least one million times more RAM than the spacecraft had. It also works at a speed which is 100,000 times (25)______ than Apollo 11's computer. So if you can find someone to program your phone for a trip to the Moon and back, all you will need to make the trip then is a spacecraft!

1. Hòa tan 10 gam muối ăn( NaCl) vào 190 gam nước thu được dung dịch NaCl. Tính nồng độ phần trăm của dung dịch NaCl thu được. 2. Hòa tan 4 gam NaOH vào nước thu được 400 ml dung dịch NaOH. Tính nồng độ mol của dung dịch NaOH thu được 3. Cho một lượng kim loại Magnesium (dư) vào 200 ml dd HCl. Sau phản ứng thu được 7,437 lit khí Hydrogen (đkc).Theo sơ đồ phản ứng sau : Mg + HCl --> MgCl2 + H2 a . Tính khối lượng Magnesium đã tham gia phản ứng? b.Tính nồng độ mol của dd HCl đã dùng c. Tính khối lượng Magnesium Chloride( MgCl2) thu được sau phản ứng cứu mình với ạ