Fluorine 20 undergoes beta decay

An iron bar has a mass of 537 g. After the bar had been standing in air for a month, exactly one-eighth of the iron turned to rust (Fe2O3). Calculate the final mass of the iron bar and the rust.

What is the molarity of a solution that contains 0.4mol KCl in 3.5L of solution?

Why are familiar objects such as pens and paper clips not commonly counted in moles?

An atom of aluminum has 13 protons and 14 neutrons. what is the atomic mass

Balance the equation: ch4 + 02 - - > co2 + h2o

The strength of an electric field depends on the

At a certain temperature, 0.4011 mol of N 2 and 1.501 mol of H 2 are placed in a 3.00 L container. N 2 (g) + 3 H 2 (g) - ⇀ ↽ - 2 NH 3 (g) At equilibrium, 0.1801 mol of N 2 is present. Calculate the equilibrium constant, K c. K c =

Which of the following is the correct name for the compound hgs? mercury sulfide mercury (i) sulfide mercury (ii) sulfide mercury monosulfide?

You are given 60 ml of 2.0 m naoh solution. how many ml of 6.0 m hcl solution is needed to completely neutralize the naoh solution? s

45 2.0 2. How many joules of heat are needed to raise the temperature of 048 kg of aluminum from 21°C to 94°C, if the specific heat of aluminum is 900 J/g °C?