Its silver tarnishing physical or chemical change.

How does the viscosity of magma change as magma cools?

What is the enthalpy change when 49.4 ml of 0.430 m sulfuric acid reacts with 23.3 ml of 0.309 m potassium hydroxide?

What metric units are volume, mass and length measured in?

Why is there no chemical process that will break down carbon

What did the Curies demonstrate by studying pitchblende?

A chemist heats a sample of hydrated lithium nitrate which weighs 170 grams and finds, after heating that it weighs 95.3 grams. What is the percent of water in the hydrate?

What is toxicity? Give an example of something from your home.

Why was it important to polish the copper strips and wire, the coin, and the nail in the electroplating experiment? You need to remove a layer of copper from the surface of each material.

Which response includes all the following that are properties of most metals, and no other properties? Z1) They tend to form cations. Z2) They have high first ionization energies. Z3) They have outer electronic shells that are more than half-filled.

How many o atoms are present in 1.04 mol of mgso4?