molar mass
What is molar mass?
The mass in grams of a mole of a substance
What is a chemical formula?
A chemical formula is a symbolic representation of a chemical compound or molecule
What are the different types of chemical reactions?
synthesis, decomposition, single displacement, double displacement, and combustion reactions
What is the purpose of balancing chemical equations?
The chemical equation needs to be balanced so that it follows the law of conservation of mass
What is an ionic bond?
a chemical bond that occurs when electrons are transferred from a metal to a nonmetal, creating oppositely charged ions that attract each other
How do you calculate the molar mass of a compound?
Moles=mass/molar mass
What are the steps to writing a chemical formula for a compound?
How tall is Samiah?
6'7
S8+Br2 --> SBr2
1S8 + 8Br2 --> 8Br2
Why do ionic compounds have high melting and boiling points?
they are held together by strong electrostatic forces of attraction between oppositely charged ions
What is the molar mass of water (H₂O)?
18.0153
How do you balance a chemical formula?
What is a synthesis reaction?
a chemical reaction where two or more simple substances combine to form a more complex product
What are reactants and products in a chemical equation?
In a chemical reaction, reactants are the substances that change into products
Describe the covalent bonding in the molecule of water (H₂O).
Each hydrogen atom shares a pair of electrons with the central oxygen atom, forming a polar covalent bond
How do you find the molar mass of an unknown substance?
Divide the measured mass by the calculated number of moles to obtain the molar mass
What is the difference between an ionic and covalent formula?
Ionic formulas represent the ratio of ions in a compound
Covalent formulas represent the number of atoms in a molecule
What is a single displacement reaction?
a reaction in which one element is substituted for another element in a compound
How do you handle reactions with hydrogen and oxygen when balancing?
leave them until the end and balance the other elements first
Predict the ionic compound formed between calcium (Ca) and fluorine (F).
calcium fluoride (CaF2)
Why is molar mass important in stoichiometry?
Molar mass is crucial in stoichiometry because it allows you to convert between the mass of a substance and the number of moles
What is a hydrate, and how is its formula written?
Hydrate, any compound containing water in the form of H2O
Formula: N2H4
What is a combustion reaction?
a substance reacts with oxygen and releases a huge amount of energy in the form of light and heat
2NaOH + 1H2SO4 → 1Na2SO4 + 2H2O
NaOH + H2SO4 → Na2SO4 + H2O
How do you identify a covalent bond?
You can identify a covalent bond by determining the difference in electronegativity between the atoms involved in the bond.