what is the ratio of the rate of effusion of helium (atomic mass 4.00 amu) to that of oxygen gas (molecular mass 32.0 amu) ?

Given the reaction: 2 NaOH + H2SO4 Na2SO4 + 2 H2O How many milliliters of 1 M NaOH are needed to exactly neutralize 100 milliliters of 1 M H2SO4? a 50 ml b 100 ml c 200 ml d 400 ml

An empty beaker weighs 34.06g. When it is completely filled with water, the beaker weighs 66.79. What is the volume that the beaker can contain?

H2O is a single atom of wat true or false?

Of the elements Na, C, Si, and P, which is a metal? a. Na b. C c. Si d. P

What are pioneer species? a. Species which are the first to colonize previously biodiverse ecosystems. b. The last species to appear in an area after a disturbance. c. Only species that live in a climax forest. d. None of these answers are correct.

What type of overall charge, if any, does the balloon in Diagram B have? Explain how you determined your answer.

Move deep below the ocean's surface

The Ka of an acid is 1.3 x 10^-7. Based on the Ka and its relationship with Kw, what is the value of Kb? Use KaKb=Kw 1.3 x 10^-21 7.7 x 10^-15 1.3 x 10^-14 7.7 x 10^-8

A covalent bond is best described as Question 1 options: the sharing of electrons between atoms. the transfer of electrons. a bond between a metal and a nonmetal. a bond between a metal and a polyatomic ion.

From the list below, choose which groups are part of the periodic table