Acetylene gas (c2h2) used in welding, pro- duces an extremely hot flame when it burns in pure oxygen according to the reaction
2 c2h2(g)+5 o2(g) −→ 4 co2(g)+2 h2o(g) .
how much co2 is produced when 2 g of c2h2 burns completely?

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.