Question 1

Question

Question 2
A) Which statement best describes an oxidation-reduction reaction?
(1 point)
a chemical reaction in which electrons are transferred between reactants
a chemical reaction in which there are fewer products than reactants
a chemical reaction in which electrons are released from the system
a chemical reaction that involves oxygen
A) Beryllium (Be) has four electrons. Fluorine (F) has nine electrons. Which
chemical formula shows the correct subscripts for the product of the reaction
when beryllium and fluorine combine? (1 point)
Be2F2
Be2F
BeF2
BeF
11/22/24, 3:39 AM Vega Viewer SPA

Question 3
A)
Use the reaction to answer the question.
2KCl → 2K + Cl
Which type of reaction is shown?
(1 point)
2
combination
combustion
decomposition
displacement
11/22/24, 3:39 AM Vega Viewer SPA

Question 4
A)
Use the periodic table to answer the question.
Which element is most likely to replace hydrogen in a displacement
reaction?
(1 point)
helium (He)
oxygen (O)
bromine (Br)
lithium (Li)
11/22/24, 3:39 AM Vega Viewer SPA

Question 5
A) A hydrocarbon reacts with oxygen. Which products are the result?
(1 point)
hydrogen gas and oxygen gas
water and hydrogen gas
carbon and oxygen gas
carbon dioxide and water

Answer 1

Here are the answers to your questions:

Question 1:
Which statement best describes an oxidation-reduction reaction?
Answer: a chemical reaction in which electrons are transferred between reactants.

Question 2:
Which chemical formula shows the correct subscripts for the product of the reaction when beryllium and fluorine combine?
Answer: BeF2.
(Explanation: Beryllium (Be) has a +2 charge, and fluorine (F) has a -1 charge. Therefore, two fluorine atoms are needed to balance the charge of one beryllium atom, resulting in BeF2.)

Question 3:
Which type of reaction is shown in 2KCl → 2K + Cl?
Answer: decomposition.
(Explanation: Decomposition reactions involve a single compound breaking down into two or more elements or simpler compounds.)

Question 4:
Which element is most likely to replace hydrogen in a displacement reaction?
Answer: lithium (Li).
(Explanation: Lithium is an alkali metal and is more reactive than hydrogen, making it capable of displacing hydrogen in a reaction.)

Question 5:
A hydrocarbon reacts with oxygen. Which products are the result?
Answer: carbon dioxide and water.
(Explanation: When hydrocarbons burn in the presence of oxygen, they typically produce carbon dioxide (CO2) and water (H2O).)