تجمع استفسارات ؟ ♥ ♥ #تحضيري_15 ♥ ♥

[BbiRiBpapa]

How many grams of aluminum (Al) are required to complete reaction with 30.0 g of Cr2O3, as the following reaction 2Al + Cr2O3 --> Al2O3 + 2Cr

Formaldehyde has the formula CH2O. How many molecules are there in 3.0 g of CH2O?


How many grams of Cl2 can be prepared from the reaction of 12.2 g of MnO2 and 50.0 g of HCl according to the chemical equation: MnO2 + 4HCl --> MnCl2 + Cl2 + 2H2O

اللي يعرف طريقة الحل يكتبها بليز