Which of the following substances is a compound? (1 point)
O water (H_{2}*O)
O carbon (C)
⚫ gold (Au)
O oxygen (O)
The correct answer is water (H2O). Compounds are substances made up of two or more different elements bonded together. Water consists of hydrogen (H) and oxygen (O) atoms bonded together to form a compound.
Which of the following substances is an element? (1 point)
hydrogen
Osalt
protein
insulin
The element in the list is hydrogen. Elements are substances that cannot be broken down into simpler substances by chemical means. Hydrogen is an example of an element because it consists of only hydrogen atoms and cannot be further broken down into simpler substances.
Which of these properties is a chemical property? (1 point)
O hardness
O melting point
Omagnetism
flammability
The correct answer is flammability. Flammability is a chemical property because it describes how a substance reacts with oxygen and undergoes a chemical reaction to produce heat and light. Hardness, melting point, and magnetism are physical properties that describe the behavior or characteristics of a substance without changing its chemical composition.
The chemical formula for methane is C*H_{4} What is the fixed ratio of carbon (C) to hydrogen (H)?
O 4/5
1/4
O 1:1
O 1/5
The fixed ratio of carbon (C) to hydrogen (H) in methane (CH4) is 1:4. This means that for every 1 carbon atom, there are 4 hydrogen atoms in methane.
Which of the following was one of the influences of the Roman Republic in the framing of the Constitution?
(1 point)
O a centralized government that provides for more order
O elected representatives who are the voice of the people
O a judicial system that is controlled by the people
O a democratic govemment run by the people
The correct answer is elected representatives who are the voice of the people. One of the influences of the Roman Republic in the framing of the Constitution was the concept of representative government. In the Roman Republic, citizens elected representatives to serve in government and make decisions on their behalf. This concept was adopted in the framing of the Constitution, where the United States also established a system of elected representatives who would voice and represent the concerns of the people.
Habeas corpus guarantees which right?
(1 point)
O the right to vote
O the right to have a fair trial
O the right to be free unless charged with a crime
the right to speak freely