PLEASE HELP 6.203g of Na2CO3.xh2o was dissolved in water and the solution made up of 1000cm3. If 25cm3 of this solution requires 20.5cm3 of 0.122moldm-3 hydrochloric acid for complete neutralisation, calculate the mass of the hydrated salt​

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

Can someone me with 3 and 4 plz. this is for masteries test.

Is water wet? my friends are debating.