Jizzax viloyati zomin tumani 2-maktabining – “ ” sinf o`quvchisi

Nazorat shakli: 
masalalar yechish. 
1-masala: 
87,75g osh tuzini hosil qilish uchun qancha massa natriy metali kerak. 
2-masala: 
tarkibida 63,22 % Mn va 36,78 % O bo’lgan moddaning formulasini aniqlang. 
3-masala: 
10g H2 ning normal sharoyitdagi hajmini va undagi molekulalar sonini toping. 
4-masala: 
41g natriy fosfatning modda miqdorini hisoblang. 
5-masala: Quyidagi reaksiyalarni tugallang va koeffitsiyentlarni qo’ying. 
Al + Cl2 → P + O2 →
N2 + H2→ 
Ag+Br→ 
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