Deprecated: Return type of AdvancedAds\Abstracts\Data::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/erudites/web/erudites.ng/public_html/wp-content/plugins/advanced-ads/includes/abstracts/abstract-data.php on line 431 A Rock Sample Was Added To Cold Dilute HNO3. The Gas Evolved Was Passed Into A Solution Of Acidified K2Cr2O7 And The Solution Turned Green. The Sample Contains? - Erudites Academy
A rock sample was added to cold dilute HNO3. The gas evolved was passed into a solution of acidified K2Cr2O7 and the solution turned green. The sample contains?