земляне !!1) Apples are than chips. (healthy)
2) Gold is
than silver. (expensive)
3) I am
at English than my brother. (good)
4) Saikal is
than Jyldyz. (thin)
5) English is
than Kyrgyz. (difficult)
6) Love is
than money. (important)
7) The girls are
as boys. (smart)
8) Maths for me is
than Geography. (easy)
9) Strawberry ice-cream is
(tasty) as cherry one.
10) A cup is not
(big) as a mug.​

1.no

2.no

3.yes

4.no

5.no

6.no

7.yes

8.no

9.yes

10.yes

h2so4 + 2naoh = na2so4 + 2h2o

m(h2so4) = m(p-pa)*w(h2so4) = 98*0,1 = 9,8 г

n(h2so4) = m(h2so4)/m(h2so4) = 9,8/98 = 0,1 моль

n(naoh) = m(naoh)/m(naoh) = 10/40 = 0,25

по уравнению видно, что килоты должно быть в два раза меньше щелочи.

кислоту имеем в недостатке, она прореагирует полностью, по ней и считаем:

n(na2so4) = n(h2so4) = 0,1 моль.

m(na2so4) = n(na2so4)*m(na2so4) = 0,1*142 = 14,2 г.

2naoh + sio2 = na2sio3 + h2o

2naoh + na2sio3 = na4sio4 + h2o

sio2 + mgo = mgsio3