A sample of i-131 decays from 12 microcuries to 3.0 microcuries in 16 days. what is the half-life of i-131?

The nucleus of an isotope of chlorine contains 20 neutrons

How many grams of water are made from the reaction of 16.0 grams of oxygen gas?

Consider the following generic chemical reaction: 2A+3B→3C How many moles of B are required to completely react with: 8 mol of A, 9 mol of A, 3 mol of A, and 10 mol of A?

A piece of metal with a mass of 159 g is placed in a 50 mL graduated cylinder. The water level rises from 20. mL to 41 mL. What is the density of the metal?

What exactly is a reservoir?

What is the density of plastic?

A bond exists between A and B in the compound AB. A and B are sharing electrons. The type of bond is

Chem! 15 pts + brainliest Using Ideal Gas law, what is the volume of 5.00 mol of helium at 393.15 degrees Kelvin and 1520 mmHg? Question 17 options: 1206 L 80.7 L 10.96 L

A weather balloon is filled with helium that occupies a volume of 5.23 104 L at 0.995 atm and 32.0°C. After it is released, it rises to a location where the pressure is 0.720 atm and the temperature is - 11.5°C.

An atom in the excited state can have an electron configuration of