Which property of a substance is not affected by physical changes?

A) reactivity

B) size

C) shape

D) position

What part of the atom undergoes change during radioactive decay

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Combustion analysis of 1.200 g of an unknown compound containing carbon, hydrogen, and oxygen produced 2.086 g of CO2 and 1.134 g of H2O. What is the empirical formula of the compound?

Applying Gas Laws to Hot Air Balloons A propane torch is lit inside a hot air balloon during preflight preparations to inflate the balloon. Which condition of the gas remains constant? volume pressure temperature DONE

Scoring: Your score will be based on the number of correct matches minus the mumber of incorrect matches.

An element is a pure substance. It can not easily be broken down into parts by physical means. A) True B) False

Sodium phosphate and calcium chloride react to form sodium chloride and calcium phosphate. If you have 379.4 grams of calcium chloride and an excess of sodium phosphate, how much calcium phosphate can you make?

What is the maximum number of electrons in the second electron shell, closest to the nucleus?

Which compound is formed from its elements by an exothermic reaction at 298 K and 101.3 kPa?

Energy can be transformed from one form to another. The diagram shows one such process. Which energy transformation is represented in the diagram?