Calculate the mass of butane needed to produce 47.4g of carbon dioxide

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

What stress will shift the following equilibrium system to the left? n2(g) + 3h2(g) ⇌ 2nh3(g) adding more n2(g) adding more nh3(g) increasing the pressure of the system reducing the volume of the container

The tilt of the earth's axis of rotation is responsible for the a) ocean's tides. b) size of the moon. c) brightness of stars. d) earth’s seasons.