A sample of phosphorus-32 has a half-life of 14.28 days. If 55 g of this radioisotope remain unchanged after approximately 57 days, what was the mass of the original sample?

Give the oxidation state of the metal, number of d electrons, and the number of unpaired electrons predicted for [Co (NH3) 6]Cl3.

What is the role of an enzyme? a. speeds up biochemical reactions b. causes biochemical reactions c. is a product in biochemical reactions d. provides extra heat for biochemical reactions

How many unpaired electrons are present in each of the following? (a) [CoF6]3 - (high spin) (b) [Mn (CN) 6]3 - (low spin) (c) [Mn (CN) 6]4 - (low spin) (d) [MnCl6]4 - (high spin) (e) [RhCl6]3 - (low spin)

How many isotopes does carbon have?

The vapor pressure of pure water at 25 °C is 23.8 torr. Determine the vapor pressure (torr) of water at 25 °C above a solution prepared by dissolving 35 g of urea (a nonvolatile, non-electrolyte, molar mass = 60.0 g/mol) in 75 g of water.

How do you do percent composition in chemistry?

Which mixture has the largest particle size?

Identify the precipitate (if any) that forms when KOH and Cu (NO3) 2 are mixed

What will happen to the equilibrium of this reaction if HCl gas is injected into the system? H 2 (g) + Cl 2 (g) Missing Metadata 2HCl (g) Question 1 options: The reaction will move to produce more HCl.

What combination of primary colors do we mix to get yellow