How many ng/s are there in 5.55 x 10^-7 oz/hr?

The answer is 4.37055148 ng/s

Explanation:

A unit of mass, weight, or volume is called  ounce used in most British derived customary systems of measurement. The common avoirdupois ounce (approximately 28.3 g) is 1 ⁄ 16 of a common avoirdupois pound.

1 ng = 3.527396194958E-11 oz

1 oz = 28349523125 ng

Hence by calculating for 5.55 * 10^-7 oz/hr, we get 4.37055148 ng/s.

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the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.