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Chemistry Midterm

Chemistry Midterm for 2019-2020

QuestionAnswer
what is PRECISION how close measurements are to one another
what is ACCURACY how close a measurement is to the true value
what is LAW OF CONSERVATION OF MASS mass of reactants = mass of products
what is NUCLEUS center of the atom; houses protons and neutrons
what is PROTON positive subatomic particle; identifies elements and the atomic #
what is NEUTRON neutral subatomic particle
what is ELECTRON negative subatomic particle
what is ATOMIC NUMBER number of protons
what is MASS NUMBER protons + neutrons
what is MOLAR MASS the mass of 1 mole
what is ISOTOPE same number of protons; different number of neutrons
is FREEZING a physical or chemical change physical
is CONDENSING a physical or chemical change physical
is MELTING a physical or chemical change physical
is CUTTING a physical or chemical change physical
is DISSOLVING a physical or chemical change physical
is DECOMPOSING a physical or chemical change chemical
is SPOILING a physical or chemical change chemical
is GRINDING a physical or chemical change physical
name the formula for zinc oxide ZnO
name the name for SiO2 Silicon dioxide
name the formula for hydrochloric acid HCl
Name the name for H3PO4 phosphoric acid
Name the formula for dicarbon hexahydride C2H6
Name the formula for chloric acid HClO3
Name the formula for magnesium bicarbonate Mg(HCO3)2
Name the name for HClO2 chlorous acid
Name the name for PbO lead (II) oxide
Name the name for NH3 ammonia
Name the formula for nitrogen trioxide NO3
Name the name for Ca(NO2)2 calcium nitrite
Write the formula for, Identify the reaction type, Predict the product, Balance, Write the name of the products: calcium chromate Balance: CaCrO4 + 2HBr -> CaBr2 + H2CrO4 Reaction Type: DR Name: calcium bromide and chromic acid
Write the formula for, Identify the reaction type, Predict the product, Balance, Write the name of the products: Boron and Carbonic Acid Balance: 2B + 3HCO3 -> B2(CO3)3 + 3H2 Reaction Type: SR Name: boron carbonate and hydrogen
Write the formula for, Identify the reaction type, Predict the product, Balance, Write the name of the products: Sodium chlorate Balance: 2NaClO3 -> 2Na + Cl + 3O2 Reaction Type: decomposition Name: sodium and chlorate and oxygen
Write the formula for, Identify the reaction type, Predict the product, Balance, Write the name of the products: Potassium and fluorine Balance: 2K + F2 -> 2KF Reaction Type: combination Name: Potassium Fluoride
Created by: blossom16