Which of the following species has the largest ionic radius?

A sample of iron absorbs 67.5 J of heat, upon which the temperature of the sample increases from 21.5ºC to 28.5 ºC. If the specific heat of iron is 0.450 J/gK, what is the mass of the sample?

What is the empirical formula for the compound that contains 49.4 % K, 20.3% S, and 30.3 % O by mass?

Arrange the following three substances: NO+, NO2-, and NO3- in order of decreasing (largest to smallest) N-O bond length.

Two possible electron-dot structures are shown below for the cyanate ion, NCO-: Which of these Lewis Structures is the most favorable?

How many protons, neutrons, and electrons are there in one ion of 63Cu2+?

The temperature of a 15 g sample of lead metal increases from 22 ºC to 37 ºC upon the addition of 29.0 J of heat. What is the specific heat of lead (in J/gK)?

When calcium carbonate is heated, CO2 (g) is produced according to the following balanced equation: CaCO3 (s) → CaO + CO2 (g) If 5.00 g of CaCO3 (s) is heated, what volume (in L) of CO2 (g) would be produced when collected at a temperature of 27.0 ºC and a pressure of 0.920 atm?

What is the chemical formula of the compound, lead (II) carbonate?

A certain pain medication (the only known legal remedy to enduring a 75 min CHM 113 lecture) is a compound composed entirely of C, H and O. It contains 75.69 % C, 8.80 % H, and 15.51 % O by mass. What is the empirical formula of this compound?