Did scallops live before or after dinosaurs according to a fossil record

What must be part of a quantitative observation?

Which of the following has can make 3 bonds? A-sodium (Na) B-Neon (Ne) C-Oxygen (O) D-Nitrogen (N)

Given the equation zn (s) + 2 hcl (aq) → zncl2 (aq) + h2 (g), what mass of hydrogen gas is produced when 2.8 g zn is reacted with excess aqueous hydrocholric acid?

In two or more complete sentences, compare petroleum to natural gas. How are they similar? How are they different?

While performing a recrystallization, a chemist notices that a small amount of the sample will not dissolve, even after the recrystallization solution has been boiling for some time. Select the correct course of action. A.

What type of reaction does Fe+Ag2SO4-FeSO4+Ag

In which one of the following solutions is silver chloride themost soluble? A. 0.744 M LiNO3 B. 0.0176 M NH3 C. 0.181 M HCl D. 0.181 M NaCl E. pure water

A 5.701 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 12.28 grams of CO2 and 5.029 grams of H2O are produced. In a separate experiment, the molar mass is found to be 102.1 g/mol.

One amu is equal to the mass of an electron the mass of one proton or one electron the mass of one neutron or one electron the mass of one neutron or one proton

Given an unknown mixture consisting of two more substances, explain how could you determine whether that mixture is a true solution, a colloid or a suspension