Balance the following equation (a.) CaC2 + 2H2O → Ca(OH)2 + C2H2
(b.) (NH4)2 Cr2O7 → Cr2O3 + N2 + 4H2O
(c.) 2CH3NH2 + 9O2 → 2CO2 + N2 + 5H20

Much of the general structure and physical properties of the interior of the earth are inferred from: a)deep oil and gas bore holes b)geologic investigations c)analysis of seismic waves d) study of volcanoes

Can someone me with questions 15 to 17 plz.

If the concentration of phosphate in the cytosol is 2.0 mm and the concentration of phosphate in the surrounding fluid is 0.1 mm, how could the cell increase the concentration of phosphate in the cytosol? a) passive transportb) diffusionc) active transportd) osmosise) facilitated diffusion