- What is the answer of square root of x less than 0?

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How many moles of H+ ions are present in 102.9 mL of 0.42 M nitric acid? Enter to 4 decimal places.? How do i find the range of f(x): 1 / (x^2 + 7) ? 4. If you are given a sample containg 1.204 x 10 24 molecules of NaCl, what is its weight in grams? Bags & Cases? Is halogen's reactivity higher than Alkali metal's that?