One of her friend goes to Hanoi by bike.

\(CaO+2NaOH->Ca\left(OH\right)_2+Na_2O\)

0,9x95+1,8x2+0,9

=0,9x95+0,9x2x2+0,9

=0,9x95+0,9x4+0,9

=0,9x(95+4+1)

=0,9x100

=90

\(CaO+H_2O->Ca\left(OH\right)_2\)

OH

1.office

2.resources

3.unique

4.wealthy

5.diverse

6.sincere

7.qualify

8.symbolize

9.accents

10.native

1.Despite being illness, she still went to cinema to watch her favourite movie.

2.I haven't met her for two years.

3.It's the first time they have ever eaten in this restaurant.

4.I have worked for this company for 5 years.

5.An English project will be done next week.

6.Tom wasn't so hard-working that he get good marks

1.volunteer

2.helping

3.for

4.don't

5.free

6.projects

7.homeless

8.in

A

goes on hoặc keeps on nha