4Fe+3O2→2Fe2O3
What happens to atoms of Fe and O2 during the reaction?
During the reaction, the atoms of Fe and O2 undergo a chemical transformation.
4 atoms of Fe react with 3 molecules of O2 (which contains a total of 6 atoms of O) to form 2 molecules of Fe2O3 (which contains a total of 6 atoms of O).
This means that each atom of Fe reacts with 3/2 atoms of O, leading to the formation of a new compound, Fe2O3.
So they are rearanged?
Yes, during the reaction, the atoms are rearranged to form new compounds. The iron (Fe) atoms combine with the oxygen (O2) molecules to form iron(III) oxide (Fe2O3). This rearrangement of atoms is a characteristic of a chemical reaction.
Do they gain mass?
During a chemical reaction, mass is conserved according to the law of conservation of mass. This means that atoms are rearranged, but no atoms are gained or lost during the reaction. Therefore, the total mass of the reactants (Fe and O2) is equal to the total mass of the products (Fe2O3).
Which is most likely to occur during a chemical reaction?
During a chemical reaction, several possible changes can occur. Here are some common changes that are likely to happen:
1. Formation of new compounds: Reacting elements or compounds combine to form new compounds with different properties.
2. Rearrangement of atoms: Atoms are rearranged to form new compounds, resulting in the breaking and formation of chemical bonds.
3. Changes in energy: Chemical reactions often involve the absorption or release of energy in the form of heat, light, or electrical energy.
4. Change in physical properties: The reaction may result in changes in color, odor, temperature, state of matter, or other observable physical characteristics.
5. Conservation of mass: The total mass of all substances involved in the reaction remains the same before and after the reaction.
It's important to note that the specific changes observed in a chemical reaction depend on the reactants and the conditions under which the reaction occurs.
NaHCO3+HC2H3O2→NaC2H3O2+H2O+CO2
A student mixes baking soda (NaHCO3
) and acetic acid (HC2H3O2
) to produce a chemical reaction shown. Which statement about the reaction is correct?
The correct statement about the reaction is that it produces NaC2H3O2 (sodium acetate), H2O (water), and CO2 (carbon dioxide).
In the reaction, baking soda (NaHCO3) reacts with acetic acid (HC2H3O2) to produce sodium acetate (NaC2H3O2), water (H2O), and carbon dioxide (CO2). This reaction is commonly known as a double displacement reaction or an acid-base reaction.
The atoms of the reactants are regrouped during the reaction.
Some atoms gain mass after the reaction.
Atoms of Na are destroyed during the reaction.
There are more H atoms after the reaction.
Which one is the correct statement?
The correct statement is: "There are more H atoms after the reaction."
In the given chemical equation, NaHCO3 + HC2H3O2 → NaC2H3O2 + H2O + CO2, the number of H atoms on both sides of the equation is equal. There is no destruction or creation of Na atoms during the reaction. The atoms of the reactants are regrouped and rearranged to form the products. However, it's important to note that the conservation of mass still holds true, meaning that the total number of atoms of each element remains constant before and after the reaction.
The Mound Builders primarily lived in what regions? Select all that apply.
(1 point)
Responses
Region A
Region B
Region C
Region D
Region E
To accurately answer this question, I would need more information about the specific regions being referred to. Without that information, it is not possible to select the correct regions where the Mound Builders primarily lived.
What was a common theme shared by the Mayan and Aztec civilizations?
(1 point)
Responses
They traded fur with the Dutch and French.
They were both interested in astronomy.
They shared similar marriage customs.
They were nomadic and traveled in clans.
The common theme shared by the Mayan and Aztec civilizations is that they were both interested in astronomy.
Both the Mayan and Aztec civilizations had a deep interest in astronomy and developed sophisticated astronomical systems. They studied the movements of celestial bodies, developed calendars based on astronomical observations, and incorporated astronomical knowledge into their religious and cultural practices.
What was the initial reason for Columbus’s journey to the New World?
The initial reason for Christopher Columbus's journey to the New World was to find a direct sea route to Asia. In the late 15th century, European powers were seeking new trade routes to the lucrative markets of the East, particularly for spices and other valuable goods. Columbus believed that by sailing west across the Atlantic Ocean, he could reach Asia and establish a more direct trade route for Spain. However, instead of reaching Asia, Columbus landed in the Caribbean islands, which became known as the "New World" or the Americas.
What was a primary challenge faced by the Jamestown colonists during the first few years?
(1 point)
Responses
They chose an unsecure location, making it easy for the Spanish to find them.
They chose an unsecure location, making it easy for the Spanish to find them.
They lacked knowledge about the land and how to use their environment to survive.
They lacked knowledge about the land and how to use their environment to survive.
They faced fierce trading competition from the French and Dutch.
They faced fierce trading competition from the French and Dutch.
All of the crops they grew had to be shipped back to King James in England.
The primary challenge faced by the Jamestown colonists during the first few years was that they lacked knowledge about the land and how to use their environment to survive.
The Jamestown colonists arrived in Virginia in 1607 and faced numerous difficulties in establishing a successful settlement. They had little understanding of the local environment, including what crops to grow, how to hunt or fish, and what resources were available. They also struggled with disease, food shortages, conflicts with Native American tribes, and harsh weather conditions. Their lack of knowledge about the land and their environment made it difficult for them to sustain themselves and initially led to high rates of starvation and mortality.
why was land near water so important for French settlers?
(1 point)
Responses
Settlers relied on water routes for transportation.
Settlers relied on water routes for transportation.
Settlers used water routes to hunt for food.
Settlers used water routes to hunt for food.
Settlers depended on water from rivers and lakes for their crops.
Settlers depended on water from rivers and lakes for their crops.
Settlers continued to look for a Northwest Passage across the continent.
The correct answer is: Settlers relied on water routes for transportation.
French settlers considered land near water to be important because they heavily relied on waterways for transportation. The French established settlements along major rivers, such as the St. Lawrence River and the Mississippi River, to facilitate trade and exploration. Water routes provided an efficient means of transportation for goods, resources, and communication within and between settlements. Additionally, rivers and lakes provided access to fish and other sources of food, further enhancing the economic and survival prospects for French settlers.
What was one major similarity that Spanish, Dutch, French, and English settlements had in common relative to the relations with Native Americans?
(1 point)
Responses
All relied on Native Americans for fur trading.
All relied on Native Americans for fur trading.
All respected their way of life and religious beliefs.
All respected their way of life and religious beliefs.
All established missions where Native Americans could live and work.
All established missions where Native Americans could live and work.
All believed they were superior to Native Americans.
All believed they were superior to Native Americans.
The correct answer is: All believed they were superior to Native Americans.
One major similarity among Spanish, Dutch, French, and English settlements in relation to their interactions with Native Americans was the belief in their own superiority over the indigenous peoples. European colonizers generally viewed themselves as culturally and technologically superior to Native Americans, often leading to conflicts and discriminatory treatment. This belief in superiority manifested in attempts to convert Native Americans to Christianity, impose European norms and values onto them, and assert colonial control over their lands and resources. It is important to note that while this was a shared belief among European settlements, individual experiences and relationships with Native Americans could vary.
Which of the following were effects of Pizarro’s and Cortes’s defeat of Native Americans? Select all that apply.
(1 point)
Responses
settlement and colonization of Florida under Spanish rule
settlement and colonization of Florida under Spanish rule
inspiration for other Europeans to begin explorations and settlement
inspiration for other Europeans to begin explorations and settlement
settlement and colonization in the Southwest under Spanish rule
settlement and colonization in the Southwest under Spanish rule
fighting between the Spanish and the French
The correct responses are:
- Settlement and colonization of Florida under Spanish rule.
- Inspiration for other Europeans to begin explorations and settlement.
- Settlement and colonization in the Southwest under Spanish rule.
Pizarro's defeat of the Inca Empire in South America and Cortes's defeat of the Aztec Empire in Mesoamerica had significant effects. Spanish colonization expanded into new areas, including Florida and the southwest regions of North America. These conquests inspired other European powers to engage in exploration and colonization, leading to increased European presence in the Americas. Additionally, the Spanish established new settlements and colonies in the regions they conquered, solidifying their rule and influence. However, there is no direct mention of fighting between the Spanish and French as a result of Pizarro's and Cortes's victories.