Is zinc oxide a chemical or physical change when heated?

Which noble gas is similar to Magnesium, Mg, on the periodic table?

Libby has a mass of 45 kg in space, her mass would be: More than 45 kg Exactly 45 kg Less than 45 kg

How many atoms in 2.8 mol of neon? (show working)

Damien runs around a 200 m oval track at the end of 4 laps what will be his distance and displacement

A 14-karat gold ring contains other metals that make it stronger than pure gold. What is this type of matter called? A. a colloidal mixture B. an elemental particle C. a homogeneous mixture D. a heterogeneous substance

A reaction takes place that results in an amount of 585 grams of product that is recovered. The theoretical amount calculates to be 650 grams. What is the percent yield?

2. This graph shows the energy involved in a reaction involving two molecules. Describe what is happening or what the state of the reaction is at A, B, C, and D. Then tell if this is an exothermic or an endothermic reaction.

Which group of elements belongs to the f-block? O metalloids O inner transition metals O metals O nonmetals

When you open a bottle of a soft drink and leave it open, the drink eventually goes flat. this happens because the equilibrium between carbonic acid and carbon dioxide shifts to produce?

When you go down a group, does the tendency for a metal to react (become duller) increase or decrease?