Thực hiện chuỗi phản ứng sau (ghi rõ điều kiện, nếu Bài 1. Na

NaOH

→ NaAlO₂

có):

Al(OH)3

Bài 2. ALO,

AICI; → AI(NO3)3 →Al₂O₁ → NaAlO₂

Bài 3. FeyOa

Fe

→FeCl₂

→ Fe(OH)₂

→ Fe(OH)₁

Bãi 4. Cu(NOs) mà

Cu(OH)2 CuO

→ Cu

→ Cu(NO3)2

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of

Insoluble sulfide compounds are generally black in color. which of the following combinations could yield a black precipitate? check all that apply. na2s(aq)+kcl(aq) li2s(aq)+pb(no3)2(aq) pb(clo3)2(aq)+nano3(aq) agno3(aq)+kcl(aq) k2s(aq)+sn(no3)4(aq)

To prevent the presence of air, noble gases are placed over highly reactive chemicals to act as inert "blanketing" gases. a chemical engineer places a mixture of noble gases consisting of 4.37 g of he, 13.36 g of ne, and 36.65 g of kr in a piston-cylinder assembly at stp. calculate the partial pressure in torr of kr.