Which balanced equation represents a phase equilibrium?

(1) H2 (g) + I2 (g) 2HI (g)

(2) 2NO2 (g) N2O4 (g)

(3) Cl2 (g) Cl2 (l)

(4) 3O2 (g) 2O3 (g)

1. - Menthol is a flavoring agent extracted frompeppermintoil. It contains C, H, and O. In one combustion analysis, 10.00 mg of the substance yields 11.53 mg H2O and 28.16mg CO2. What is the empirical formula of menthol? 2.

A sample of gas y occupies 500 L at the pressure of 80 KPa. after changing the volume of the sample the pressure of it is 400 KPa what is the new volume of the gas?

Enough of a monoprotic acid is dissolved in water to produce a 0.0136 M solution. The pH of the resulting solution is 2.45. Calculate the Ka for the acid.

Describe the characteristics of the Sun (By the way I know that this is not chemistry, sorry about that)

shayla was late for school. she ran the last half mile in four minutes. what was her average speed in miles per hour

All energy waves other than the visible light spectrum cannot be seen. true or false

Describe two important functions for carbon dioxide in the atmosphere.

In the chemical reaction: 2 h 2 (g) o2 (g) → 2 h2o (g), with 8 grams of h 2 (2 grams/mole) and 16 grams of o2 (32 grams/mole) and the reaction goes to completion, what is the excess reactant and how much of that would remain

What is the volume of a gold nugget that weighs 2.20 kg? The density of gold is 19.28 g/cc.

Find the percentage composition of carbon in H5C2O