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Chemistry Midterm
Chemistry Midterm for 2019-2020
Question | Answer |
---|---|
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 |