unit 5 Flashcards
what is matter
anything that has mass and volume
what is mass
a measure of how much matter is in an object
what is volume
how much space an object takes up
what is a mixture
2 or more pure sutances combined together
what is a homogenous mixture
same through out, cant see any difference
what is a heterogeneous mixture
different through out, can see difference in composition
what is filtration
separates a solid from a liquid
what is distillation
liquids are boiled to produce a vapor, which is then condensed into a liqued
what is decanting
pouring one phase from a container and leaving the remaining phase
what is chromotography
passing a mixture dissolved in a mobile phase through a stationary phase
what are the 6 evidences of chemical change
smell, temperature, precipitate, color, energy, gas is evolved
what does it mean when gas is evolved
a gas is given off when solids and or liquids reacts
the smell of paper burning is what
an example of a smell during a chemical change
iron rusting is an example of what evidence of a chemical reaction
color change
what does precipitate is formed mean
a solid is formed from reaction of liquids
what dose energy mean for a chemical reaction
can be given off as a light or sound
what does endothermic mean
absorbs heat, feels cold
what does exothermic mean
releases heat, feels hot
what are the chemicals on the left of the equation called
reactants
what are the chemicals on the right side of the equation called
products
what does the law of conservation of mass state
total mass of a substance in a chemical reaction does not change
what is combustion
oxygen combines with another compound to form water and carbon dioxide as well as producing heat
what is the general form of combustion
C,H,O,+ O2-> CO2+H2O
what is synthesis/combination
two or more elements or compounds combine to form a more complicated one
