How many liters will be needed if 7.99 grams of (NH4)2CO3 dissolve to make a 0.210 molar solution? * 0.41 L
1.34 L
1.55 L
2.34 L
(please show work)

Can someone me with questions 15 to 17 plz.

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils.the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.

In which region is the substance in both the solid phase and the liquid phase? 1 2. 3 4 mark this and return save and exit next