Urgent which statement describes a chemical property of hydorgen gas 1. hydrogen gas is colorless 2. hydrogen gas burns in the air 3.hydrogen gas has a density of .00000009 gcm3 4. hydrogen gas has a boiling point of 20k at standard pressure

Covalent network solids typically have melting points and boiling points. the chemical formula of a network solid indicates in the molecule.

Rocks, as they are compressed, begin forming mountains above the earth's surface when two continental plates converge. the continental crust increases in depth as the mountains grow above. the himalayan mountains formed at a convergent plate boundary in this manner. the rocks are smashed together causing them to due to the intense heat and pressure from the colliding plates and eventually forming rock. a) melt; igneous b) layer; sedimentary c) recrystallize; metamorphic d) melt into the earth's interior; metamorphic

Determine the reaction and balance the following equations urgent due in the morning