Answer:
A
Explanation:
The basic building block of living things; the smallest piece of every organism that has all of the characteristics of a living thing and can perform all life functions, An organelle is a subcellular structure that has one or more specific jobs to perform in the cell, much like an organ does in the body.
The reaction of iron ore with carbon follows the equation: 2 Fe2O3 + 3 C 4 Fe + 3 CO2.
How many grams of Fe can be produced from a mixture of 200. g of Fe2O3 and 300. g of C?
In the above problem, which reactant is limiting and which is in excess?
Answer:
The person writes a coefficient of 2 in front of Fe2O3 but then writes a 4 for the number of iron (Fe) atoms. Explain this difference.
Explanation:
The iron oxide Fe₂O₃ is the limiting reagent while carbon (C) is the excess in the given reaction.
What is the limiting reagent?A limiting reagent can be described as a reactant that is completely exhausted from the reaction mixture at the completion of a reaction and is also named a limiting reactant.
When reactants in the chemical reaction are not taken in stoichiometric quantities, the limiting reactant will determine the maximum amount of product that can be formed in a chemical reaction from the reactants.
Given, a balanced chemical equation of the reaction between iron oxide and carbon is:
[tex]2 Fe_2O_3 + 3 C\longrightarrow 4 Fe + 3 CO_2[/tex]
Given, the amount of the iron oxide = 200 g
The molecular mass of the iron oxide = 159.69 g/mol
The number of moles of iron oxide = 200/159.69 = 1.252
Given the mass of the carbon, = 300 g
The number of moles of carbon = 300/12 = 25
If 2 moles of iron oxide react with carbon moles = 3
1.252 moles of Fe₂O₃ will react with carbon = (3/2) × 1.252 = 1.878 mol
Therefore, Fe₂O₃ is the limiting reactant and carbon is the excess reactant.
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where do you find the reactants in a chemical equation
When does a phyisical change occur?
How many grams of barium sulfate are produced if 125 mL of .050 M sodium sulfate are reacted with excess barium nitrate in the following reaction?
Ba(NO3)2 + Na2SO4 = BaSO4 + NaNO3
Answer:
2.79g
Explanation:
In sexual reproduction, how many genes does an offspring receive for each trait ♀️
Answer:
Each parent's half of the genes acquired by the offspring. They have two of each chromosome and hence two alleles of each gene, and one acquired from each parent.
Two students were doing an experiment which involved adding potassium sulfate powder to water. They added one teaspoon of potassium sulfate to the water and stirred it, and all the powder dissolved. They continued to do this until, after the fourth teaspoon, no more potassium sulfate would dissolve.
As more potassium sulfate dissolves in the water, the mixture becomes
a. more concentrated.
b. less concentrated.
c. dilute.
d. more cloudy.
Answer:
less concentrated
Explanation:
because it will get dissociated into more ions
why do gases behave least like ideal gases at low temperature and high pressure?
The ideal gas law fails at low temperature and high-pressure because the volume occupied by the gas is small, therefore the inter-molecular distance between the molecules falls. And hence, an attractive force can be seen between them.
What is ideal gas law ?The ideal gas law states that the pressure, volume, and temperature of a gas are directly proportional to each other, as long as the number of particles and the mass of the gas remain constant. So long as the number of particles and gas mass remain constant.
The ideal gas law can be utilized to calculate the volume of gases produced. The ideal-gas equation often is used to interconvert between volumes and molar amounts in chemical equations.
At high pressures, the molecules of a gas are crowded closer together, and the amount of vacant space between the molecules is reduced.
Thus, gases behave least like ideal gases at low temperature and high pressure.
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As you move from left to right across the second period of the periodic table
A. Ionization energy increases
B. Atomic mass decreases
C. Electronegativity decreases
D. Atomic radii increase
Answer:
A. ionizing energy increases
A tabular form in which the chemical elements are positioned according to the chemical and physical attributes is called the periodic table. The horizontal rows from left to right is referred as periods in the table.
The correct option is:
Option A. Ionization energy increases
This can be explained as:
The ionization energy raises from left to right because of valence shell resilience.The nuclear charge on the atom expands and protons in the nucleus lure the electrons more strongly.Therefore due to the high proton number, the ionization increases across the period.
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Use the periodic table to help you answer this question.
Give the full electron configuration for aluminum.
Answer:
the answer is 1s22s22p63s23p1
Would you rather get tips or a commission for your wages? Why?
Answer:
commission
Explanation:
Employers benefit from paying a commission to their employees because it means that they only pay the employee if there is a sale. ... It also improves the cash flows of the business because it means that employees are only paid when money is coming in from a sale.
If i were a maneger I would love commision For the reason that is stated above, but if I was just an employe I would rather work from tips.
Find the Oxidation Number for both Ca and F.
EXPLAIN PLEASE
Answer:
F= -1 (group 7A)
Ca= +2 (group 2)
Explanation:
oxidation #= # electrons atom gains/loses to form chemical bond
>assigned to atoms in oxidation-reduction rxn to indicate ability to donate/ gain e-
> positive oxidation #= loss of e-, negative= gain of e-
rules:
all group 2 elements (ca) have an oxidation state of 2+
group 7A (F)= -1 charge (needs to gain 1 e- to complete octet)
(02.02 MC)
During the hot summer days, there is a lot more water in the air. This is due to which change of state?
What does it mean for a system to be in dynamic equilibrium?
Answer:
a state of balance between continuing processes.
Explanation:
Dynamic equilibrium only occurs in reversible reactions, and it's when the rate of the forward reaction is equal to the rate of the reverse reaction.
Describe fusion and explain how fusion and fission are similar and how they are different.
Answer: Fusion and fission are similar in that they both release large amounts of energy. Nuclear fusion is a process in which two nuclei join to form a larger nucleus. Nuclear fission is a process in which a nucleus splits into two smaller nuclei.
Explanation:
Label the liquids from least to most dense, Vegetable oil, water, Dish soap, Corn syrup, Honey
Answer:
1. Vegetable oil
2. Water
3. Dish soap
4. Corn syrup
5. Honey
Which will dissolve at the fastest rate?
a. 15 g of sugar cubes at 20° C
b. 15 g of sugar cubes at 60° C
c. 15 g of granulated sugar at 20° C
d. 15 g of granulated sugar at 60° C
The hydra is an organism that reproduces by growing another organism from the sie of its tubular body. What type of asexual reproduction is this?
Answer:
Explanation:
budding
Figure 13.3 (a) Hydra reproduce asexually through budding: a bud forms on the tubular body of an adult hydra, develops a mouth and tentacles, and then detaches from its parent. The new hydra is fully developed and will find its own location for attachment.
how many electrons does the atom have
Answer:
8
Explanation:
If a sample of gas occupies a volume of 6.80 L at 325°C, what will its volume be at
25.0°C if the pressure does not change?
Answer:
3.4L
Explanation:
Given parameters:
Initial Volume of gas = 6.8L
Initial temperature of gas = 325°C = 325 + 273 = 598K
Final temperature = 25°C = 25 + 273 = 298K
Unknown:
Final volume = ?
Solution:
To solve this problem, we apply the Charles's law. It can be expressed as;
[tex]\frac{V1}{T1}[/tex] = [tex]\frac{V2}{T2}[/tex]
V and T are volume and temperature
1 and 2 are initial and final states
Now insert the parameters and solve;
[tex]\frac{6.8}{598}[/tex] = [tex]\frac{V2}{298}[/tex]
2026.4 = 598V2
V2 = 3.4L
HELP ME pls it’s in the picture below
Answer:
Hydrated chromium(III) phosphate or chromium(III) phosphate tetrahydrate.
Answer:
the IUPAC name is chromium(III) phosphate pentahydrate.
The amount of kinetic energy an object has depends on which feature of the object?
Answer:
I think it is A
Explanation:
Because if you think about is Kinetic energy is motion
so i think it is
Its motion
Three reasons why friction is needed
Answer:
1:Without friction, we would not be able to stop walking since we would just keep slipping like on ice.
2:Without friction, objects would just slip and fall with a simple blow of air
3:And finally, without friction, we wouldn't be able to use machinery like cars and etc since they would just fly off
Explanation:
Friction can be a useful force because it prevents our shoes from slipping on the pavement when we walk and stops car tires skidding on the road. When you walk, friction is caused between the tread on shoes and the ground. This friction acts to grip the ground and prevent sliding. Sometimes we want to reduce friction.
__________ is a result of a chemical reaction between pollutants and water and is one cause of chemical weathering of rock.
A.) carbon dioxide
B.) acid rain
C.) oxidation
D.) ice crystals
Answer:ice crystals
Explanation:
True or False: The frog's eyes help it see in all directions. False True
False, frogs cannot see in all directions.
An atom gains electrons to become negatively charged
А
anion
B
cation
с
ionic bond
D
covalent bond
E
metallic bond
Answer:
A) an anion is an ion with a negative charge
B) a cation is an ion with a positive charge
The rest are bonds and do not pertain to the question
Choose the chemical equation that is correctly balanced.
Answer:
their is nothing their btw just letting you know
if a +2 ion has 18 electrons, what element is it
what is the name for C3Cl8 and is it a covalent or polar covalent bond?
Answer:
Propane, octachloro- | C3Cl8 - PubChem
The name of C3Cl8 is octachloropropane. It is a covalent bond.
What are covalent bonds ?Covalent bonds are formed when two atoms share electrons. In the case of octachloropropane, the carbon atoms share electrons with the chlorine atoms. The electrons are shared unequally, so the bond is polar covalent.
The name octachloropropane is derived from the Greek words "octo" (eight) and "chloro" (chlorine). The prefix "octa" refers to the number of chlorine atoms in the molecule. The suffix "propane" refers to the three carbon atoms in the molecule.
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When wood is burned, new substance are produced. Describe this reaction, and explain
what type of changes occurs. Use the terms flammability, chemical property, and physical
change or chemical change.
Answer:
hahahaha
Explanation:
hahahahahhahahaha soooo funny
Solar energy does not warm Earth’s surface evenly. For example, during the day, land areas warm up faster than nearby bodies of water. How does this uneven warming affect the movement of air over land and water?
Answer:
Land and sea breeze
Explanation:
This uneven warming of the land during the day results in the phenomenon called land and sea breeze.
During the day, the land heats up faster than the nearby ocean. Ocean is made up of water with a high specific heat capacity. This derives pressurized air near the surface of the land to the ocean. At night, the ocean does not easily lose heat after the land has lost its own. Pressurized air moves from the ocean to the land. This causes the warming of the land during the night.