Silver and gold are both considered coinage metals. How does a mile of silver compare with a mole of iron?

A) a mole of gold has more atoms

B) they both have the same number of atoms

C) a mole of silver has more mass

D) they both have the same mass

A biochemist isolates, purifies, and combines in a test tube a variety of molecules needed for dna replication.

A mixture of He, He, Ne, Ne, and Ar Ar has a pressure of 18.8 atm 18.8 atm at 28.0 °C. If the partial pressure of He He is 2.94 atm 2.94 atm and the partial pressure of Ar Ar is 4.27 atm, 4.27 atm, what is the partial pressure of Ne? Ne?

1. Calculate the [H] in a solution that has a pH of 9.88. A) 4.1 M B) 9.9 M C) 7.6 x 10'M D) 1.3 x 10 "M E) none of these

How does Precipitation Form

The main source of phosphorous is in: rocks water plants the atmosphe

All of the following can be used to define an acid except a hydrogen ion donor in a reaction a substance that increases the hydronium ion concentration of a solution an electron-pair acceptor in a reaction a substance that increases the hydroxide

Number of electrons, protons, and neutrons contained in an atoms nucleus?

If 95.2 grams of C4H9N were reacted with 446 grams of O2 how many grams of CO2 would be produced 4C4H9N + 29O2 = 16CO2 + 18 H2O + 4NO2

Which of the following is unchanged when a solution is diluted by the addition of solvent? a. volume of solvent b. mass of solvent c. number of moles of solute d. molarity of solution

A sample of hydrogen (H2) gas is collected over water at 35oC and 725 mm. The volume of the gas collected is 72.0 ml. How many moles of H2 gas has been collected? How many grams of H2 gas has been collected?