M Al2(AO4)3 = 27.2+3 MA + 16.4.3=342 

=> MA = 32 đvc => A là lưu huỳnh (S) 

Gọi tên cthh là nhôm sunfat 

photpho 31 đvc mà bn

 1.   A. cooks                             B. plays                                    C. hits                          D. picks

2.   A. books                            B. clubs                                    C. hats                         D. stamps

3.   A. kids                               B. roofs                                    C. banks                       D. hats

4.   A. hooks                             B.waters                                  C. chairs                      D. forms

5.   A. opens                            B. photographs                        C. performs                 D. pays

6.    A. passed                          B. watched                              C. played                     D. washed

7.    A. claimed                                      B. warned                              C. occurred                 D. existed

8.     A. wanted                        B. needed                                C. dedicated                D. watched

9.    A. cleaned                                    B. played                                 C. used                                     D. hoped

10.    A. looked                                    B. moved                                 C. gained                     D. prepared

1a 

2a 

1 up

2 on

3 off

4 up 

5 around 

6 down

cin lỗi mk nhìn nhầm số tt câu bn thông cảm nhé

um cảm ơn bn đã nhắc nhé 

Because of : 1,3,5

because : còn lại