A solar eclipse occurs when the moon apasses into the penumbra of Earth
bpasses into the umbra of Earth
Cpasses at a slight tilt between Earth and
the sun
dpasses directly between Earth and the sun

During chemistry class, carl performed several lab tests on two white solids. the results of three tests are seen in the data table. based on this data, carl has concluded that substance b must have bonds.

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

Which compound contain an iron with a 3+ charge