Apiece of 18-carat gold was heated with a sample of nitric acid containing 63.0% of hno3 by mass and a density of 1.42 g cm-3. calculate the concentration, in mol dm-3, of hno3 in the sample.

What mass of carbon dioxide is produced from the complete combustion of 4.50×10−3 g of methane?

How many liters of water vapor can be produced if 108 grams of methane gas (ch4) are combusted at 312 k and 0.98 atm? show all work. pls ! will mark as brainliest

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