Chemistry 1 Final Exam questions and answers latest top score.

Chemistry 1 Final Exam questions and answers latest top score. Matter - correct ing that occupies space and has mass mass - correct amount of matter in an object pure substance - correct nts and compounds that cannot be broken down mixtures - correct nations of two or more substances that can be separated or physically mixed heterogeneous mixture - correct uniform composition ex: trail mix homogeneous mixture - correct rm composition ex: salt water qualitative data - correct cal characteristics quantitative data - correct re and calculate (numbers) Atom - correct est particle of an element that retains all the chemical properties of the element Nucleus - correct r of atom protons - correct ively charged particles neutrons - correct al charged particles electrons - correct ively charged particles electron cloud - correct space where all the electrons are held elements - correct pure substances that cannot be broken apart by ordinary means to other substances molecule - correct sts of two or more atoms, either of the same type of element or those of different elements, in a definite ratio molecular formula - correct ules are represented by this symbolic formula compounds - correct substances containing different elements in a definite ratio held together by chemical bonds chemical formula - correct unds represented by this solids - correct rigid shape and fixed volume liquids - correct no fixed shape and will take the volume of the container gases - correct d to fill their container Physical property - correct aspect of matter that is observable and measurable without changing the identity or composition of a substance intensive property - correct not depend on the size or amount of matter in the object. Ex: temp and density extensive property - correct ds on the size and/or amount of matter in the object Ex: mass length volume physical changes examples - correct ng of liquid, melting of solid, dissolving a solid in a liquid density - correct chemical reaction - correct formation of one or more atoms or molecules into one or more different molecules C to F - correct answers.C= 5/9(F-32) precision - correct closely related the data agrees with itself standard deviation - correct used to determine precision sqrt(sum of all numbers-mean)^2/(n-1) accuracy - correct well the data relates to the accepted values error - correct difference between experimental results and the theoretical value percent error - correct answers.(experimental value - accepted value)/(accepted value) *100 scientific notation - correct hand for very large or very small numbers Rules for sig figs - correct answers.2. when adding or subtracting numbers, the number of decimal places in the answer is equal to the number with the fewest digits after the decimal 3. in multiplication or division, you use the number with the fewest sig figs. percent abundance - correct answers.(# atom of a given isotope)/(total # of all isotopes of that element) *100 mole - correct amount of substance that contains as many particles as there are in 12g of carbon Avogadros number - correct answers.6.02*10^23 particles molecular compounds - correct of molecules ionic compounds - correct of ions allotropes - correct rent forms of the same element in the same physical state under the same conditions polyatomic molecules - correct atoms of the same element form a molecule Binary compounds - correct ular compounds made of only two different elements condensed formula - correct how the molecule is put together isomers - correct molecular formula but different structural formula structural formula - correct more detail about a molecules arrangement anion - correct ively charged cation - correct ively charged electrostatic forces - correct s of attraction and repulsion coulombs law - correct force of attraction between ions is proportional to their charge and inversely proportional to their distance empirical formula - correct simplest whole number ratio of a formula chemical equations - correct reaction is a process of changing a substance or substances into something else types of reactions - correct nation, single replacement, double replacement, separation law of conservation of matter - correct r cannot be created nor destroyed