My House
I am Jenny. Look! This is my house. What's in the house? Let me show you the rooms. This is the kitchen. Here is the bathroom. That is the living room. Here is my bedroom. That is Danny's bedroom. His bedroom is very nice.
Al2O3 + 6HCl ═ 2AlCl3 + 3H2O; Al2O3+ 2NaOH ═ 2NaAlO2 + H2O
请回答下列问题:
①下列氧化物中,属于酸性氧化物的是 ____。(填字母编号)
A.H2O
B.CO
C.SO2
D.Fe2O3
②NaAlO2的名称是偏铝酸钠,它属于 ____(选填“酸”、“碱”、“盐”或“氧化物”),偏铝酸钠电离时产生的阴离子是____(填离子符号)。
986+599+600+99=____
437+298+521-356=____