A solution may contain the following ions Ag , Cu 2 , Mn 2 , Ca 2 , and Na . No precipitate formed when 0.10 M NaCl was added but a dark colored precipitate formed when H 2S was added to an acidic portion of the solution. After the removal of the solid the solution was made basic and more H 2S was added and a dark precipitate again formed. Treatment of the filtrate with (NH 4) 2CO 3 resulted in a white precipitate. If no further tests were made then what conclusions can you draw

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

Which of the following is a physical property flammability heat of combustion solubility and toxicity

In science class richard learns that a substance has a boiling point of 230 fahrenheit his teacher ask him to convert this temperature to degrees celsius what is the boiling point of his substance in degrees celsius