Which of these Noble Gas elements are reactive under conditions experienced on Earth? ASAP 1. He, helium
2. Ne, neon
3. Xe, xenon
4. None of them - they are called Noble Gases because they don't react!

If this equation was completed which statement would it best support

How many moles of al3+ ions are in 1.25 moles of al2o3

The reactions shown here can be combined to make the overall reaction c(s) + h2o(g) ⇌ co(g) + h2(g) by reversing some and/or dividing all the coefficients by a number. a. c(s) + o2(g) → co2(g) k=1.363×10^69 b. 2 h2(g) + o2(g) → 2 h2o(g) k=1.389×10^80 c. 2co(g) + o2 (g) → 2 co2(g) k=1.477×10^90