How do you know a chemical reaction has occurred in a candle?

What is the standard molar enthalpy change of formation of O2 (g) at 25 °C?

What type of energy do batteries have?

Is the tendency of copper to turn green when exposed to air chemical or physical property?

Methanol (CH3OH) has a heat of fusion of 3.16 kJ/mol. Which of the following is the heat of solidification that occurs when 64 grams of liquid methanol freezes? -199 kJ -6.32 kJ 199 kJ 6.32 kJ

On a graph, which type of line shows a direct proportion? A - downwardly curved line B - jagged line C - straight line D - upwardly curved line

True or False? The fatal 1930 incident in Muese Valley, Belgium, was associated with leakage of toxic chemicals from a former dump site.

How many moles of neon (Ne, 20.179 g/mol) are in 68.4 grams of neon

A 50.00 mL sample of groundwater is titrated with 0.0300 M EDTA. Of 12.40 mL of EDTA is required to titrate the 50.00 mL sample, what is the hardness of the groundwater in molarity and in parts per million of CaCO 3 by mass

Why openness is important to the progress of science?

At a certain temperature the rate of this reaction is second order in NH4OH with a rate constant of 34.1 M^-1s^-1: Suppose a vessel contains NH4OH at a concentration of 0.100M.