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How many atoms of He gas are present in a 450 mL container at 35 degrees celsius and 740 mmHg?'? Demonstrate why access to clean water is important to human wellbeing? How do you round 91.12 to the nearest ten? (2^x-3)/(4^-2x)=64/8^x? X^2-3x+1 have the roots of m and n. Form a quadratic equation with the roots of 3-2m and 3-2n?