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قناة منصة معارف علي التليجرام الاقوي عربيا .. اشترك الآن

شرح Redox Reactions: Crash Course Chemistry #10

دورة كورس تعلم كيمياء للمبتدئيين شرح انجليزى

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قائمة الدروس | 46 درس

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قنوات تساعدك بكل سهولة على الوصول للمصادر التعليمية و الوظائف و النصائح المهنية و المنح الدراسية

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تعريف الكيمياء تُعرف الكيمياء على أنّها العلم الذي يختص بدراسة المادة (العناصر والمركبات) وخصائصها، وتكوينها، وبنيتها، وتحوّلاتها، والطاقة التي يتمّ انبعاثها خلال هذه العمليات والتفاعلات الكيميائية، ويختصّ هذا العلم بدراسة خواصّ الذرات والقوانين التي تحكم تفاعلها، وكيفية استخدام هذه الخصائص في تحقيق أغراض محددة، كما تتكوّن كلّ مادة في علم الكيمياء، سواء كانت طبيعية أم منتجة صناعياً من واحد أو أكثر من الذرات التي تمّ تحديدها كعناصر، حيث تشكّل هذه الذرات أساس المواد الكيميائية على الرغم من أنّها تتكون من جٌسيمات أولية ويعرف التفاعل الكيميائيّ بأنّه تغيير التركيب الكيميائيّ، وإعادة ترتيب الذرات المكوّنة لمادة أو أكثر من المواد لإنتاج مواد مختلفة كمنتجات جديدة
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Request history8.1.2PHP Version334msRequest Duration4MBMemory UsageGET lesson/{lesson_id}Route
    • Booting (253ms)time
    • Application (80.4ms)time
    • 1 x Booting (75.89%)
      253ms
      1 x Application (24.11%)
      80.40ms
      31 templates were rendered
      • courses.lessonlesson.blade.php#?blade
      • ads.lesson_top_fixed_boxlesson_top_fixed_box.blade.php#?blade
      • ads.lesson_after_buttonlesson_after_button.blade.php#?blade
      • inc.share_boxshare_box.blade.php#?blade
      • pages.telegram_boxtelegram_box.blade.php#?blade
      • inc.review_formreview_form.blade.php#?blade
      • ajax.review_userreview_user.blade.php#?blade
      • ads.lesson_bottomlesson_bottom.blade.php#?blade
      • beta.partials.home.sections.courses.coursecourse.blade.php#?blade
      • beta.partials.home.sections.courses.coursecourse.blade.php#?blade
      • beta.partials.home.sections.courses.coursecourse.blade.php#?blade
      • beta.partials.home.sections.courses.coursecourse.blade.php#?blade
      • beta.partials.home.sections.courses.coursecourse.blade.php#?blade
      • beta.partials.home.sections.courses.coursecourse.blade.php#?blade
      • beta.partials.home.sections.courses.coursecourse.blade.php#?blade
      • beta.partials.home.sections.courses.coursecourse.blade.php#?blade
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      • beta.layouts.partials.student-menustudent-menu.blade.php#?blade
      • beta.layouts.partials.search-input-desktopsearch-input-desktop.blade.php#?blade
      • student.login_Adminlogin_Admin.blade.php#?blade
      • beta.layouts.partials.search-modalsearch-modal.blade.php#?blade
      • beta.layouts.partials.search-input-mobilesearch-input-mobile.blade.php#?blade
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      • inc.messagesmessages.blade.php#?blade
      • beta.layouts.partials.footerfooter.blade.php#?blade
      uri
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      namespace
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      app/Http/Controllers/courseCerController.php:227-322
      11 statements were executed10.9ms
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        210μsstagingLinkMap.php#20
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        • 16. middleware::link_map:20
        • 17. vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:183
        • 18. vendor/laravel/framework/src/Illuminate/Routing/Middleware/SubstituteBindings.php:50
        • 19. vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:183
        • 20. app/Http/Middleware/LoginUsersFromApp.php:30
      • select `id`, `title`, `course_id`, `link`, `youtube_descr`, `image`, `is_work` from `lessons` where `id` = '4716' and `lessons`.`deleted_at` is null limit 1
        360μsstagingcourseCerController.php#230
        Bindings
        • 0: 4716
        Backtrace
        • 16. app/Http/Controllers/courseCerController.php:230
        • 17. vendor/laravel/framework/src/Illuminate/Cache/Repository.php:396
        • 18. vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:429
        • 20. app/Http/Controllers/courseCerController.php:231
        • 21. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • select count(*) as aggregate from `lessons` where `course_id` = 126 and `lessons`.`deleted_at` is null
        260μsstagingcourseCerController.php#241
        Bindings
        • 0: 126
        Backtrace
        • 16. app/Http/Controllers/courseCerController.php:241
        • 17. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 18. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 19. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
        • 20. vendor/laravel/framework/src/Illuminate/Routing/Route.php:205
      • select `title`, `id`, `link`, `image` from `lessons` where `course_id` = 126 and `lessons`.`deleted_at` is null limit 60 offset 0
        230μsstagingcourseCerController.php#241
        Bindings
        • 0: 126
        Backtrace
        • 16. app/Http/Controllers/courseCerController.php:241
        • 17. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 18. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 19. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
        • 20. vendor/laravel/framework/src/Illuminate/Routing/Route.php:205
      • select * from `course` where `id` = 126 and `course`.`deleted_at` is null limit 1
        240μsstagingcourseCerController.php#243
        Bindings
        • 0: 126
        Backtrace
        • 17. app/Http/Controllers/courseCerController.php:243
        • 18. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 19. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 20. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
        • 21. vendor/laravel/framework/src/Illuminate/Routing/Route.php:205
      • select `course`.*, (select count(*) from `lessons` where `course`.`id` = `lessons`.`course_id` and `lessons`.`deleted_at` is null) as `lessons_count` from `course` where `cat_id` = 21 and `is_certified` = 1 and `course`.`deleted_at` is null limit 8
        8.54msstagingcourseCerController.php#245
        Bindings
        • 0: 21
        • 1: 1
        Backtrace
        • 15. app/Http/Controllers/courseCerController.php:245
        • 16. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 17. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 18. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
        • 19. vendor/laravel/framework/src/Illuminate/Routing/Route.php:205
      • select `id`, `title`, `slug`, `cer_title` from `courses` where `id` = 21 and `courses`.`deleted_at` is null limit 1
        180μsstagingcourseCerController.php#247
        Bindings
        • 0: 21
        Backtrace
        • 16. app/Http/Controllers/courseCerController.php:247
        • 17. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 18. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 19. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
        • 20. vendor/laravel/framework/src/Illuminate/Routing/Route.php:205
      • select * from `community` where `course_id` = 126 and `community`.`deleted_at` is null limit 1
        200μsstagingcourseCerController.php#248
        Bindings
        • 0: 126
        Backtrace
        • 16. app/Http/Controllers/courseCerController.php:248
        • 17. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 18. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 19. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
        • 20. vendor/laravel/framework/src/Illuminate/Routing/Route.php:205
      • select max(`id`) as aggregate from `lessons` where `id` < '4716' and `course_id` = 126 and `lessons`.`deleted_at` is null
        230μsstagingcourseCerController.php#299
        Bindings
        • 0: 4716
        • 1: 126
        Backtrace
        • 16. app/Http/Controllers/courseCerController.php:299
        • 17. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 18. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 19. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
        • 20. vendor/laravel/framework/src/Illuminate/Routing/Route.php:205
      • select min(`id`) as aggregate from `lessons` where `id` > '4716' and `course_id` = 126 and `lessons`.`deleted_at` is null
        250μsstagingcourseCerController.php#300
        Bindings
        • 0: 4716
        • 1: 126
        Backtrace
        • 16. app/Http/Controllers/courseCerController.php:300
        • 17. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
        • 18. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
        • 19. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
        • 20. vendor/laravel/framework/src/Illuminate/Routing/Route.php:205
      • select * from `course_reviews` where `course_id` = 126 limit 1
        200μsstaginghelper.php#420
        Bindings
        • 0: 126
        Backtrace
        • 16. app/helpers/helper.php:420
        • 18. vendor/laravel/framework/src/Illuminate/Cache/CacheManager.php:429
        • 20. app/helpers/helper.php:421
        • 23. vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php:124
        • 24. vendor/laravel/framework/src/Illuminate/View/Engines/PhpEngine.php:58
      App\lessons
      47lessons.php#?
      App\course
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