This is the equation for the thermite reaction:
Fe2O3 + 2Al = Al2O3 + 2Fe
You know the charge on the Al and O ions because you know how many electrons each atoms "wants" to give or take by looking at their position on the periodic table (and because it was listed on the cards). Fe is element 26, iron, in the middle of the periodic table. Since it forms Fe2
2
O3
3
, what charge does the Fe ion have?
The charge of Fe in Fe₂O₃ is +3.
Let's consider the equation for the thermite reaction:
Fe₂O₃ + 2 Al ⇒ Al₂O₃ + 2 Fe
One of the reactants is ferric oxide, we can calculate the charge of Fe in Fe₂O₃ considering that:
The sum of the charges of the atoms is equal to the charge of the compound.The charge of a neutral compound is 0.The charge of O in oxides is -2.The charge of Fe in Fe₂O₃ is:
[tex]2Fe+3O = 0\\2Fe+3(-2)= 0\\Fe=+3[/tex]
The charge of Fe in Fe₂O₃ is +3.
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What happened to the color of peppered moths after govermental regulations were put in place to decrease air pollution?
A. moths that were lighter in color became more fit over time
B. moths became lighter during their lifetime and passed on the alleles for lighter color to their offspring
C. moths became darker during their lifetime and passed on the alleles for darker color to their offspring
D. moths that were darker in color became more fit over time
Answer:
A
Explanation:
While B seems to be correct, it is A because evoulution requires time and a moth would not have undergone such dramatic phenotypic change in its lifetime.
2. The youngest part of the ocean floor is found at the
A. convergent boundary
C. transform-fault
B. divergent boundary
D. hot spot
Answer:
B. Divergent Boundary
Explanation:
The plates are moving apart, so magma is coming up and cooling into new fresh rock.
Write the number of each atom in the chemical formulas for all of the possible combinations of positive and negative ions found on the cards. You can use the cards to figure out the formula by making as many copies of the cards as necessary to get them to line up exactly equally.
Example:
Na__Cl___
The chemical formula is NaCl, so you would place a 1 in the box for both Na and Cl.
A chemical formula is obtained from the number of atoms in a compound.
Chemical compounds are composed of atoms. The number atoms of each element in a compound determines the correct formula of the compound. Before I can write the chemical formula of any compound, I must first determine the number of each atom in the compound.
For instance, phosphorus trichloride contains one atom of phosphorus and three atoms of chlorine hence I would place a 1 in the box for P and 3 in the box for Cl.
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Black fur (B) is dominant to white fur. Soft fur (S) is dominant to rough fur. What is probability that the
offspring will have white color and rough fur?
Answer:
A) 1/16
Explanation:
Because both white fur and rough fur are recessive traits, you need all genes shown to also be recessive. If a single trait is dominant, then it will be expressed instead of a recessive gene. Because there is only one square out of sixteen that is all lowercase, the chance of having both recessive traits (White fur and Rough fur) is 1/16.
por que es tan importante el agua para nuestro cuerpo? Como podemos incorporarla en nuestro organismo?
Respuesta:
El agua es muy importante para nuestros cuerpos, porque la necesitamos para vivir y ya la correperamos en nuestro organismo.
Explicación:
Sin agua moriremos, y el agua ya está incorporada, somos aproximadamente un 60% de agua.
What is fulgurite? ? ?????????????
Answer:
Fulgurites, commonly known as "fossilized lightning", are natural tubes, clumps, or masses of sintered, vitrified, and/or fused soil, sand, rock, organic debris and other sediments that sometimes form when lightning discharges into ground.
The inside of a eukaryotic cell is
divided into the...
A. nucleus and cytoplasm
B. organ and organelle
C. cell membrane and cell interior
D. top and bottom
The inside of a eukaryotic cell is divided into the; A. nucleus and cytoplasm.
What are Eukaryotic cells?Eukaryotic cells are the one that have a well-defined membrane-bound nucleus to house genetic material in it. Eukaryotic cells also have other membrane-bound organelles.
The Cell membrane makes the selectively permeable barrier for the exchange of material with surroundings as; it separates the cytoplasm from the surroundings.
here liquid phase present between the cell membrane and nucleus is called cytoplasm.
The inside of a eukaryotic cell is divided into the; A. nucleus and cytoplasm.
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What is ocean sequestration?
Answer:
it is the process by which carbon dioxide is removed from the atmosphere, is achieved through various chemical and biological processes
Choose the stage that best matches the description given.
In warm, humid climates, only dry bones would exist at this stage.
Day 1
Day 2
After day 50
Days 3-17
Days 26-43
Days 18-25
In order for an organism to decompose to the point that only dry bones will remain, it is estimated that in warm and humid environments the process will take roughly three weeks, In which case the options of Days 26-43 as well as after day 50 are correct.
Decomposition is what happens to any dead organic material. Decomposition is when the organic material is broken down into smaller compounds, organic or not. This process is affected by a variety of conditions including:
TemperatureHumidityPresence and species of insectsElements to which the material is exposedand so on. Each of these factors can greatly impact how fast something will decompose.
The question at hand gives us the conditions for the fastest decomposition, given that this process is accelerated in warm and humid conditions. When in these conditions, it is estimated that an organism can take a minimum of three weeks to reach the stage in which all that is left is the skeleton (dry bones).
Three weeks consists of 21 days, however, option 6 that states "Days 18-25" is not being included given that during days 18-21, elements other than bones may still be present. For this reason, the correct answer is any day after day 21, that is, days 22-50+. Therefore, options 5 and 3 can both be considered correct as in those days only dry bones will remain.
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Answer: if u say this: In warm, humid climates, only dry bones would exist at this stage. on whatever your search thing
it shows that and it shows that a person on brainly said 18-25 but its the 26-43 one I think I'm not fully sure. Apologies but beware about all the other questions it made me get alot wrong those people on here are wrong i might be to
Explanation:
Days 26-43
The sweetness of the cookies changes in every run of the experiment. What type of variable is the change in sweetness?
Answer:
It's an independent variable
Explanation:
Because The independent variable is the variable the experimenter manipulates or changes, and is assumed to have a direct effect on the dependent variable.
what organ system do you use to
You lift your feet and move your legs as fast as you can
Give me info about plants and animals that live in coral reefs
Please explain in 3-4 sentences.
Thank you
Answer:
small plants ad animals tend to habit coral reefs because the sharp coral protects the animals from sharks and other predators. It also works as a ecosystem because every animal works together to provide for each other. I can t your anymore but that is the main idea of what coral does. if you can see if you can reword it into more sentences. How this helps!
Marking as brainliest
Answer:
Z = 2 and A = 4
Explanation:
which organelle do you think is the most important ? make a scientific argument by explaining what makes the organelle you chose more important than all the other organelles
Answer:
The nucleus
Explanation:
This organelle gives all the info. Without it, the cell will die. It's like a human is alive without a brain.
Angular Momentum can be expressed
as which of the following
a. L = MPR
b. L = VRM
c. L = VPM
Why do you think leewenhoek was excited about what he saw
Answer:
what kind of quastion is this
Explanation:
Question 13 (5 points)
What percent of energy is passed on to the next trophic level in an ecosystem?
The answer is 10 percent
Describe trilateration. Provide an example.
One of the roles of ecological succession is to encourage biodiversity in a habitat. Ecological succession occurs in stages and permits a habitat to allow new species to grow in number as the habitat A)is destroyed B)remains the same C)undergoes change D)is relocated
Ecological succession occurs in stages and permits a habitat to allow new species to grow in number as the habitat undergoes change. Thus C is the correct option.
What is ecological succession?Ecological succession is defined as the process through which the mix of species and habitat in an area changes over time. Gradually these communities replace one another until a climax community like a mature forest is reached, or until a disturbance, like a fire, occurs.
There are two major types of ecological succession namely primary succession and secondary succession. Primary succession occurs when a new patch of land is formed or exposed for the first time.
Secondary succession occurs when a climax community or intermediate community is impacted by a disturbance.
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What was the first industrial use of biotechnology?
A. Dissolving boulders with vinegar
B. Dissolving pearls with vinegar
C. Preserving food with vinegar
D. Drying food with a low fire
Answer:
C
Explanation:
Drying food with low fire
One species has 24 chromosomes, and another species has 26 chromosomes. If these two species are crossed, how many chromosomes will their offspring have?
Species A : 2N = 24, N = 12
Species B : 2n = 26, n = 13
During the hybridization N + n = 25
Type of molecule ,been having a hard time figuring it out
Answer: Cyclic adenosine monophosphate
Explanation:
Which of the following principles best correlates to the philosophy behind IPM planning?
o choose the most effective method to eliminate pests
O use natural rather than synthetic methods to control pests
choose the safest approach with the least human risk
o do the least possible harm while controlling pests
this is for my plant systems class
Answer:
Use natural rather than synthetic methods to control pests.
Explanation:
Integrated Pest Management (IPM) encompasses a variety of techniques used to maintain an acceptable level of pests in a given environment. that limits use of pesticides and maintains soil nutrients for future crops. Its four components are prevention, avoidance, monitoring, and suppression.These practices rely on natural efforts first
50 POINTS+ BRAINLIST
During the course of their work, healthcare professionals can be exposed to all kinds of germs. Three of these are viruses, bacteria, and fungi. Draw a Venn diagram that compares and contrasts these three pathogens. Give at least one example of diseases caused by each.
You don't actually need to draw a diagram, just give examples.
clearly is if the fungi get to u the first thing that gonna happn is you're going to get cancer and about bacteria stomach sickness diareah flu head ache and clearly its going to be hard for u to breath
how are active faults and inactive faults similar
Answer:
Active faults are structure along which we expect displacement to occur. By definition, since a shallow earthquake is a process that produces displacement across a fault, all shallow earthquakes occur on active faults. Inactive faults are structures that we can identify, but which do no have earthquakes.
Explanation:
What is the endosymbiotic hypothesis?
Answer:According to the Endosymbiotic Theory, the mitochondria and chloroplast in eukaryotic cells were originally aerobic bacteria (prokaryotes) that were consumed by a huge anaerobic bacterium (prokaryote).
When muscle cells run out of____________, they resort to lactic acid fermentation for a supply of energy. A. Carbon Dioxide B. Oxygen
Answer:
B oxygen
Explanation:
When your body runs out of oxygen, or your other systems can't deliver oxygen to your muscles quickly enough, your muscles convert the available glucose into lactic acid instead.
Lactic acid fermentation is the energy source used by muscle cells when their supply of oxygen runs low.
What is muscle cell?A muscle cell is sometimes known as a myocyte because smooth muscle cells and cardiac muscle cells are both very small cells. The long, threadlike cells of skeletal muscle with many nuclei are known as muscle fibers. Muscle cells are derived from myoblasts, which are embryonic progenitor cells.The cytoplasm and cell membrane of a muscle cell are known respectively as sarcoplasm and sarcolemma. The sarcoplasm contains myoglobin, which is a site for storing oxygen, and glycogen in the form of granules in the cytosol, which is an energy source.When your body runs out of oxygen or when your other systems are unable to transfer oxygen to your muscles quickly enough, your muscles convert the available glucose into lactic acid instead of oxygen.To learn more about muscle cell refer to:
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which of the following statements is NOT part of the cell therory
Answer:
it is accepted that cells contain DNA in chromosomes and RNA in the nucleus and cytoplasm, but only in the modern cell theory. the classical cell theory does not include this. but using either classical or modern theory, it is false that all cells have DNA surrounded by a nucleus.
Explanation:
Hope this helps.
What would most likely be the effect if an experimental design specifies only an experimental group?
1. The experiment will lack a control.
2. The experiment will lack a purpose.
3. The experiment will not be repeatable.
4. The experiment will not have variables.