Of the elements Fe, Hg, U, Te, and Y, which is considered a Group A, element?

A chemist who studies water samples did a demonstration of how to test for lead in water. She added a clear solution of potassium iodide to a clear solution of lead nitrate. Then a yellow swirling solid formed in the liquid.

In complete sentences, describe the behavior of a substance in each state of matter if placed in a closed container

The compound manganese (II) bromide is a strong electrolyte. Write the transformation that occurs when solid manganese (II) bromide dissolves in water.

Which earthquakes cause the most damage?

How does ground water become polluted

Predict the electronegativity of the yet undiscovered element with Z = 119.

3.15 g of an unknown gas at 35 °C and 1.10 atm is stored in a 1.85-L flask. What is the density of the gas? what is the molar mass of the gas?

Suppose the diver at the top of a 9 m high platform has a mass of 50.0 kg. Calculate her potential energy relative to the ground. Answer in Joules.

A typical hydrogen peroxide solution from a drug store is labeled as 3.0% hydrogen peroxide. what is the other 97% of this solution?

The pressure of an enclosed gas depends on