What is the formula for hydrobromic aicd _______ .

An unknown element X forms a compound with the formula Al2X3.  X forms an ion that has 36 electrons.  What is the identity of X?  _______ .

Racing cars at the Indianapolis Motor Speedway  travel around the track at an average speed of 275 mi/hour. What is this speed in kilometers per hour? (use the correct number of significant figures) 1 m=1.094 yd;  1 mi=1760 yd _______ kilometers/hr

The molar mass of calcium phosphate, Ca3(PO4)2 is

In the atmosphere nitrogen dioxide gas reacts with water to produce nitrogen monoxide gas and nitric acid. What is the correct unbalanced equation for this reaction?

The length of the nail should be recorded as

The number of milliliters in 0.0483 liter is

When the following equation is balanced using the smallest possible integers, what is the number in front of the Sr(s)?Sr(s) + P4(s) ® Sr3P2(s)

Acetylene gas is 92.3% carbon and 7.7% hydrogen by mass. What is the emperical formula?

The number of neutrons in one atom of is