Which element has both metallic and nonmetallic properties?

(1) Rb (3) Si

(2) Rn (4) Sr

How many molecules are there in 2.30 grams of NH3

The process in beer production that produces carbon dioxide and ethanol is known as

When an atom of phosphorus becomes a phosphide ion (P3-), the radius (1) decreases (2) increases (3) remains the same?

Which molecules would most likely cause a liquid to have the lowest viscosity?

A student produces 1.34g of mgnh4po4*6h2o (mm = 245.1 g/mol) from a sample of fertilizer, how grams of phosphorous were in the fertilizer?

What is the H3O + ion concentration of a solution that has an OH - ion concentration of 1.0 * 10^-3M? A) 1.0 * 10^-3M B) 1.0 * 10^-7M C) 1.0 * 10^-11M D) 1.0 * 10^-14M

Given the following chemical reaction: 2 O2 + CH4 CO2 + 2 H2O In the reaction of 6 moles of CH4 with excess oxygen, how many moles of water could be produced? 6 C 12.01 Carbon 1 H 1.01 Hydrogen 8 O 16.00 Oxygen A. 4 B. 6 C. 8 D. 12

Most mutagens have what kind of an effect on an organism?

According to the hess's law, the enthalpy of solution is: δhsoln = δhsolute + δhsolvent + δhmix. considering dissolving a small drop of nonpolar pentane oil in water which term (s) in the equation will experience the largest enthalpy change.

Solve for x: ln x = 0.863. Report your answer to 3 significant figures.