Molar Mass
Molar mass of N
14.01 g/mol
The empirical formula is always the same as the molecular formula. True or False?
FALSE
What is the molecular formula of Water?
H₂O
This classification of matter refers to substances that have a fixed composition and cannot be separated by physical means.
Pure Substance
IUPAC stands for
International Union of Pure and Applied Chemistry
Molar mass of F4
76.99 g/mol or 76.00 g/mol
The empirical formula of C₂H₆.
CH3
What is the molecular formula of ammonia?
NH₃
This isotope is used as the standard for measuring atomic masses and is the most abundant form of carbon found in living organisms.
Carbon-12
Who is the Russian chemist that developed the framework of the Periodic Table?
Dmitri Mendeleev
Molar mass of S8
256.56 g/mol
The empirical formula of a compound with 36g of Carbon, 6g of Hydrogen, and 48g of Oxygen.
CH2O
A compound contains 3 carbon atoms, 8 hydrogen atoms, and no oxygen. What is its molecular formula?
C₃H₈ (Propane)
This class of organic compounds contains the –O– functional group and is used as solvents, anesthetics, and in perfumes.
Ethers
Give any of the two elements that Marie Curie discovered.
Radium and/or Polonium
A chemist weighs out one mole of SiF₄ gas for an experiment. How many grams should the sample contain?
104.08 g/mol
A compound’s molecularformula is C4H10O2, and its molar mass is 90.12 g/mol. What is the empirical formula of the compound?
C₂H₅O
The empirical formula of a compound is CH₂O, and its molar mass is approximately 180 g/mol. What is the molecular formula?
C₆H₁₂O₆ (Glucose)
This type of nucleosynthesis is responsible for forming elements heavier than iron during the explosive death of massive stars.
Supernova
Which quantum number determines the shape of an atomic orbital?
Azimuthal Quantum Number (l)
How many grams are there in one mole of TESTOSTERONE (C₂₁H₃₀O₂)?
314.45 g/mol
A compound contains 40.0% sulfur and 60.0% oxygen. The empirical formula is...
SO₃
The empirical formula of a compound is NO₂. Its molar mass is 92 g/mol. What is its molecular formula?
N₂O₄ (dinitrogen tetroxide)
How many grams of calcium phosphate, Ca₃(PO₄)₂, are in 2.15 moles of the compound?
≈ 666.99 grams or ≈ 666.89 grams
Which acid is known as aqua fortis?
Nitric acid (HNO₃)