Name two different ecosystems. Name one living part of each ecosystem. Name one non living part of each ecosystem.

Hydrogen, oxygen, and chlorine are some of the ___ elements

The initial water level in a 10 - mL graduated cylinder reads 4.1 mL. after a ruby gemstone is dropped into the cylinder, the water level reads 7.1 mL what is the volume of the ruby?

Nickel (ii) chloride dissolves in water to form a light green solution. what ions are present in solution-that is, what is "swimming around" in the aqueous solution? write the formulas

The technetium-99 nuclide radioactively decays by beta emission. write a balanced nuclear chemical equation that describes this process.

A solution made by dissolving 9.81 g of a nonvolatile nonelectrolyte in 90.0 g of water boiled at 100.37degree C at 760 mm Hg. What is the approximate molecular weight of the substance? (For water, Kb = 0.51 degree C/m)

In the Table of Atomic Particles, various symbols have two numbers. The top number represents the atomic mass of the particle, what do the bottom numbers represent? Select all that apply.

A chemist is working on a reaction represented by this chemical equation: FeCl2 + 2KOH → Fe (OH) 2 + 2KCl. If the chemist uses 4.15 moles of iron (II) chloride and 3.

vWould radiation with a wavelength 0.91 nm or a frequency of 5.9*1011 s-1 be detected by an X-ray detector? Would radiation with a wavelength 0.91 or a frequency of 5.9*1011 be detected by an X-ray detector? Only the radiation with a wavelength 0.

Why Thioacetamide is heated?

Which compound decreases in solubility as the temperature of the solution is increased from 10c to 50c