Which chemical equation is unbalanced?

1. C + O2 → CO2

2. Sr + O2 → 2SrO

3.6H2 + 3O2 → 6H2O

4. H2 + H2 + O2 → H2O + H2O

A reaction XY occurs in a closed vessel. when it reaches equilibrium at temperature T, the number of molecules changing from X to Y is equal to the number of molecules changing from Y to X true or false.

What has law is in use when you place dry ice into a balloon

What is the pressure in atmospheres of 6.0 moles of an ideal gas if its volume is 2.0 liters and its temperature is at 80.0°C? Record your answer to the nearest atmosphere.

An element has four naturally occurring isotopes with the masses and natural abundances given in the table below. Find the atomic mass of the element (express your answer to four significant figures and include the appropriate units).

In which reaction do four total molecules of reactants produce two total molecules of products? 2SO2 + O2→2SO3 2H2S + 3O2→2SO2 + 2H2O SnO2+ 2H2→Sn + 2H2O N2+3H2→2NH3

Is burning wood a physical change

A gas is located inside a closed container. if the gas is allowed to occupy more volume inside the container, what will happen to the pressure? (note: there is no gas added to the container.)

An open-end manometer containing mercury was connected to a vessel holding a gas at a pressure of 767 torr. The atmospheric pressure was 724 torr. What is the difference in the heights of the mercury, expressed in cm?

When does raising the temperature of a gas increase its pressure? A. temperature B. volume C. number of particles D. pressure

Hexyne. What does the name of this hydrocarbon tell you about its molecular structure?