What is the pH of 20 mL of the standard 0.4 M HCl solution?

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

Ethanol (c2h5oh) is produced from the fermentation of sucrose in the presence of enzymes. c12h22o11(aq) + h2o(g) 4 c2h5oh(l) + 4 co2(g) determine the theoretical yield and the percent yields of ethanol if 680. g sucrose undergoes fermentation and 326.5 g ethanol is obtained. theoretical _ g _ percent %

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true