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You can contact us on WhatsApp on this number 01070359601 ✔️ Link to the online lessons platform of Mr. Mohamed Mustafa https://droosakonline.com/ ✅️ How to register and enter the code • Video And also if you would like to attend the center with Mr. Mr. This year, God willing, he will be present in Shubra, Egypt: ✅ Al-Raei Center, Rod El Farag 📌 Location of Al-Raei Center, Rod El Farag https://maps.app.goo.gl/vKuiC2ub9mA1Q... You will exit Rod El Farag Metro Station and ask about Al-Raei Center ❤️ ✅ Al-Sahaba Center, Saint Theresa 📌 Location of Al-Sahaba Center https://maps.app.goo.gl/HS7L3T8bkMGrT... You will exit Saint Theresa Metro Station and ask about Bibo Restaurant, the center is right next to it Explanation of the third lesson, the second chapter, second secondary chemistry, the strength of oxygen acids, second secondary, how do you know the strength of Acid, explanation of the third lesson, chemistry for the second year of secondary school, chemistry for the second year of secondary school, chemistry for the second year of secondary school, acid strength, oxyacid strength, chemistry for the second year of secondary school, the oxygen, oxyacid strength, chemistry for the second year of secondary school