Why are alphabets in the order they are?

Cortisone consists of molecules, each of which contains 21 atoms of carbon (plus other atoms). the mass percentage of carbon in cortisone is 69.98%. what is the molar mass of cortisone?

Chlorine has two isotopes, 35Cl and 37Cl that have the respective percent abundance's of 75.77% and 24.23% and masses of 34.9688 amu and 36.9659 amu. Calculate the atomic weight of chlorine.

What is the main difference in covalent bonds in diatomic chlorine and diatomic oxygen? diatomic means two atoms of the same type. a. diatomic chlorine is ionic, diatomic oxygen in covalent c.

What is the bond for PbCl4

What is the total number of quarks in a helium nucleus consisting of 2 protons and 2 neutrons?

Give two examples of diffusion process in plants and animals.

If it takes 54 mL of 0.1 M NaOH to neutralize 125 mL of an HCl solution, what is the concentration of the HCl?

9. I've been called a "storage tank" by those with little taste. I'm a sac filled with water, food, enzymes, or waste.

If 3.52 L of nitrogen gas and 2.75 L of hydrogen gas were allowed to react, how many litres of ammonia gas could form? Assume all gases are at the same temperature and pressure.

Which of these statements describes one way that a nonrenewable energy resource is obtained? A. Wind turbines are placed on a coastline. B. Trees are cut down in a forest. C. Water is dammed on a river. D. Uranium is mined from rock.