CHM151 Rio Salado Midterm Questions and Answers 100% Pass
4 views 0 purchase
Course
CHM151 Rio Salado
Institution
CHM151 Rio Salado
CHM151 Rio Salado Midterm Questions
and Answers 100% Pass
What is the definition of an element in chemistry?
An element is a substance that cannot be broken down into simpler substances by chemical
means and consists of only one type of atom.
How do you determine the number of protons i...
CHM151 Rio Salado Midterm Questions
and Answers 100% Pass
What is the definition of an element in chemistry?
✔✔ An element is a substance that cannot be broken down into simpler substances by chemical
means and consists of only one type of atom.
How do you determine the number of protons in an atom?
✔✔ The number of protons in an atom is equal to the atomic number of the element.
What is the primary difference between an ionic bond and a covalent bond?
✔✔ An ionic bond is formed by the transfer of electrons from one atom to another, while a
covalent bond is formed by the sharing of electrons between atoms.
What is a chemical reaction?
✔✔ A chemical reaction is a process in which one or more substances are converted into
different substances with new chemical and physical properties.
What does the term "mole" refer to in chemistry?
1
,✔✔ A mole is a unit that measures the amount of substance and is defined as \(6.022 \times
10^{23}\) particles, atoms, or molecules.
How is the molecular formula different from the empirical formula?
✔✔ The molecular formula shows the actual number of atoms of each element in a molecule,
while the empirical formula shows the simplest ratio of the elements in a compound.
What is the purpose of balancing a chemical equation?
✔✔ Balancing a chemical equation ensures that the number of atoms of each element is the same
on both sides of the equation, adhering to the law of conservation of mass.
What is the definition of a solution in chemistry?
✔✔ A solution is a homogeneous mixture composed of two or more substances where one
substance (the solute) is dissolved in another (the solvent).
What is the difference between an acid and a base according to the Bronsted-Lowry theory?
✔✔ According to the Bronsted-Lowry theory, an acid is a proton (H+) donor, and a base is a
proton acceptor.
2
, What is meant by the term "oxidation state" of an element?
✔✔ The oxidation state of an element is the charge that an atom would have if all bonds to
atoms of different elements were 100% ionic.
How do you calculate the molar mass of a compound?
✔✔ To calculate the molar mass of a compound, sum the atomic masses of all the atoms in the
compound’s molecular formula.
What is a limiting reactant in a chemical reaction?
✔✔ The limiting reactant is the substance that is completely consumed first in a reaction and
determines the amount of product formed.
What is the difference between exothermic and endothermic reactions?
✔✔ An exothermic reaction releases heat to its surroundings, while an endothermic reaction
absorbs heat from its surroundings.
How do you find the concentration of a solution?
✔✔ The concentration of a solution can be found by dividing the amount of solute by the
volume of the solution, typically expressed in units such as molarity.
3
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller BrilliantScores. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.99. You're not tied to anything after your purchase.
