Suppose you take a piece of hard wax from an unlit candle. After you roll the wax between your fingers for a while, it becomes soft. What State of matter is the softer wax? Is it possible for wax to change without changing state

Order these terms from biggest to smallest son universe local group Milky Way galaxy and SolarSystem

Compound A, C6H8, absorbed 3 equivalents of H2 on catalytic hydrogenation over a Pd/C catalyst to give B (C6H14). On ozonolysis, compound A gave, among other things, a ketone which was identified as acetone.

A student calculates the mass of a piece of copper to be 8.3 grams. The actual mass of the copper is 10. grams. What is the percent error? Show your work below. Round your answer to two digits

Based on the ideal gas law, there is a simple equivalency that exists between the amount of gas and the volume it occupies. at standard temperature and pressure (stp; 273.15 k and 1 atm, respectively), one mole of gas occupies 22.4 l of volume.

Relative dating determines the relative age of fossils according to A. their radioactive decay. B. their size. C. the layer of rock they're found in. D. the time of day when they were found.

Hypervitaminosis is a serious health threat associated with excessive amounts of ingested fat-soluble vitamins. why do water-soluble vitamins not commonly pose the same threat?

Hydrogen is an element with two naturally occurring isotopes: 2 H and 3 H. This means that 2 H, which has a mass number of 2, has fewer than 3 H, which has a mass number of 3. True/False

C₂H₂ + O2 - CO₂ + H₂ How many moles of oxygen are necessary to react completely with 4.0 moles of propane (CH) ?

What are the two main classifications of energy resources?

A liquid is heated and a solid forms at the bottom of the beaker. Is this a physical or chemical change?