What mass of KSCN is dissolved in 750. mL of 0.155 M KSCN solution? (K = 39.10 g/mol, S = 32.07 g/mol, C = 12.10 g/mol, N =14.01 g/mol)

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What is the subscript for oxygen in its molecular formula

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

How might this scientific phenomena be explained? a paper clip floats on water.