Hỗn hợp gồm Al, Cu, Fe có khối lượng 14,7 gam tác dụng vừa hết với 8,96 lít khí clo (đkc). Nếu cũng lấy lượng hỗn hợp trên tác dụng với dung dịch H2SO4 đặc nguội thì thu được 2,24 lít khí (đkc).
a) Tính % khối lượng mỗi kim loại trong hỗn hợp.
b) Tính thể tích dung dịch NaOH 1M cần dùng ít nhất để tác dụng hoàn toàn với dung dịch muối clorua
để: - Thu được lượng kết tủa tối đa v{ tính lượng kết tủa trong trường hợp này. - Thu được lượng kết tủa tối thiểu v{ tính lượng kết tủa trong trường hợp này.

Why do scientists look for patterns in the world? a. patterns can explain observations. b. patterns never change, no matter what. c. patterns are easy for scientists to detect. d. patterns are all the same, through all time.

When hydrochloric acid reacts with potassium hydroxide solution, the following reaction occurs. hcl (aq) + koh (aq) h2o (l) + kcl (aq) the reaction gives off heat energy, so it is an reaction.

What is the relationship between wind and ocean waves? question 17 options: wind moving at higher speeds will transfer more energy to the water, resulting in stronger waves. wind moving at higher speeds will transfer energy over a larger part of the ocean water, resulting in waves with a shorter wavelength. winds moving at higher speeds with cause water to move forward at faster rates, causing larger ocean waves. winds moving at higher speeds will affect deeper water, resulting in waves that move at a faster rate. how do temperature and salinity affect deepwater currents? question 15 options: as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them.