___ SeCl6 + ___ O2 --> ___ SeO2 + ___ Cl2 What is the balanced equation for these reactions?

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Explanation for basic character?

What is the lowest number energy level where a d sublevel is found

Scientists often have to deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each number in an alternate form.