5. choose the correct variant. 1) five pens? a. does she b. has she c. is she 2) the have a lot of books. - id1016524020230325 от EkaterinaVNTOGLIATTI 25.03.2023 22:04

Question

Химия: 5. choose the correct variant. 1) five pens? a. does she b. has she c. is she 2) the have a lot of books. a. pupil b. pupils c. pupil s 3) does he coffee? a. drinks b. drink c. to drink 4) what does she a. to drink b. drink c. drinks 5) she can well. a. skates b. skate c. to skate​

EkaterinaVNTOGLIATTI · Accepted Answer

Оксид калия — основный оксид, так что реагирует с кислотами, водой, кислотными оксидами. Ищем:
1) K2O+2HCl = 2KCl+H2O
K2O+2H(+)+2Cl(-) = 2K(+)+2Cl(-)+H2O
K2O+2H(+) = 2K(+)+H2O
2) K2O+H2O = 2KOH
Тут без ионных уравнений, потому что оксиды не диссоциируют, вода является слабым электролитом.

Оксид фосфора — кислотный оксид, реагирует с основаниями, основными оксидами и водой. Ищем:
1) 6KOH+P2O5 = 2K3PO4+3H2O
6K(+)+6OH(-)+P2O5 = 6K(+) + 2PO4(3-)+3H2O
P2O5+6OH(-) = 2PO4(3-)+3H2O
2) Не уверен, какой получится реакция с водором, зависит от количества реагентов:
P2O5 + 8H2 = 2PH3 + 5H2O
Либо
P2O5 + 5H2 = 2P + 5H2O

5. choose the correct variant.
1) five pens?
a. does she
b. has she
c. is she
2) the have a lot of books.
a. pupil
b. pupils
c. pupil's
3) does he coffee?
a. drinks
b. drink
c. to drink
4) what does she
a. to drink
b. drink
c. drinks
5) she can well.
a. skates
b. skate
c. to skate

MOGZ ответил

5. choose the correct variant.1) five pens? a. does sheb. has shec. is she2) the have a lot of books.a. pupilb. pupilsc. pupil's3) does he coffee? a. drinksb. drinkc. to drink4) what does she a. to drinkb. drinkc. drinks5) she can well.a. skatesb. skatec. to skate​

MOGZ ответил

5. choose the correct variant.
1) five pens?
a. does she
b. has she
c. is she
2) the have a lot of books.
a. pupil
b. pupils
c. pupil's
3) does he coffee?
a. drinks
b. drink
c. to drink
4) what does she
a. to drink
b. drink
c. drinks
5) she can well.
a. skates
b. skate
c. to skate