Moles
What is a mole?
A mole is a unit of measurements, traditionally used by chemists to measure large quantities of small substances, such as on an atomic level or molecular level.
Who invented the periodic table?
Dimitri Mendeleev
How is molar mass of a compound calculated.
Adding each atomic mass per different element, but for multiple atoms in one element, multiplying that atomic mass by the subscript and adding it to the total sum of the other masses/elements.
What is the process describes as the movement of H20 throughout our worldly ecosystem?
The water cycle.
What does the -> symbolize in chemical equations?
"Yeilds"
What is Avogadro's Constant?
Defined by Avogadro as the number of units in a mole in terms of any substance:
6.022 x 1023 mol
Are the periods defined as the rows or the columns on the periodic table?
The columns.
What is the definition of percent composition?
The definition of percent composition is the mass percent of each element in a compound, based on that of the other elements.
What is the meaning of the Latin term "bio?"
Life.
What does an ionic compound typically consist of?
A nonmetal bonded with another metal.
Who first introduced the mole into chemistry?
Both chemists August Wilhelm Hofmann Friedrich Wilhelm Ostwald receive credit.
Chromium.
The atomic number.
What defines the empirical formula?
As defined by Oxford dictionary, the empirical formula is a formula that give the proportions of the elements present in a compound, but not the actual number/integers or arrangement of atoms within it.
What is the definition of the food chain?
The series of energy and ecological dependance from one organism to another as dependance of food sources.
What do covalent bonds typically consist of?
A nonmetal bonded with another nonmetal.
What is a molar mass of a substance?
The definition of the molar mass of a substance is defined as the mass of a substance as units of grams per one mole of a substance.
What is the trend of electronegativity on the period table?
Generally, electronegativity will increase towards the right and the top of the table.
What is the term for factors in stoichiometry used as connectors to calculate other factors in terms of the other factors.
Conversion factors.
What biome is CCHS located in?
The biome is a temperate deciduous forest.
What must be true of all proper chemical equations?
The amount of products must yield the same amount of reactants.
What is the molar mass of Magnesium?
24.305 moles
Unless this is a compound, the molar mass is the atomic weight.
How many elements are on the periodic table?
118 elements.
What field of chemical calculations is a theoretical yield included in?
Stoichiometry.
What is the difference between Earth Science and Life Science?
Life Science - Study of living systems and their interactions within the Earth.
Earth Science - Study of Earth systems (including life science) and Earth's systems in space.
2 HCl + 2 Na -> ??
Product: 2 NaCl + H2