Answer:
it is the objects mass, I learned this last semester
The object's mass has a greater impact on the kinetic energy of an object as it is the mass the mass on which force is exerted and in which energy is stored to be transformed in to kinetic energy.
What is force?Force is defined as a cause which is capable of changing the motion of an object. It can cause an object which has mass to change it's velocity. It is also simply a push or a pull . It has both magnitude as well as direction.Hence, it is a vector quantity.
It has SI units of Newton and is represented by'F'.Newton's second law states that force which acts on an object is equal to momentum which changes with time. If mass of object is constant, acceleration is directly proportional to net force acting on an object.
The concepts which related to force are thrust and torque .Thrust increases the velocity of an object and torque produces change in rotational speed of an object.
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magnesium has two naturally occurring isotopes: magnesium-24 and magnesium-25. if the average atomic mass of magnesium is 24.305 amu, what are the percent abundance's of each isotope?
a. 69.5% and 30.5%
b. 50% and 50%
c. 62% and 38%
d. 0.7% and 0.3%
e. .62% and .38%
Answer:
a. 69.5% and 30.5%
Explanation:
we know there are two naturally occurring isotopes of Mg, Mg-24 and Mg-25.
First of all we will set the fraction for both isotopes
X for the isotopes having mass 25
1-x for isotopes having mass 24
The average atomic mass of Mg is 24.305 amu.
we will use the following equation,
25x + 24 (1-x) = 24.305
25x + 24 - 24x = 24.305
25x- 24x = 24.305 - 24
1x = 0.305
x= 0.305 /1
x= 0.305
0.305 × 100 = 30.5 %
30.5 % is abundance of Mg-25 because we solve the fraction x.
now we will calculate the abundance of Mg-24.
(1-x)
1-0.305 =0.695
0.695 × 100 = 69.5%
69.5% for Mg-24.
what does inductive effect mean?
Answer:
Tbh I looked it up but here is what I found. I hope it helps
Explanation:
In chemistry, the inductive effect is an effect regarding the transmission of unequal sharing of the bonding electron through a chain of atoms in a molecule, leading to a permanent dipole in a bond.
The process by which a cell takes in a large particle is called
A
endocytosis.
B
diffusion.
C
active transport.
D
exocytosis.
Answer:
A endocytosis
Explanation:
The process by which a cell takes in a large particle is called endocytosis. Therefore, the correct option is option A.
What is endocytosis?Endocytosis is the procedure by which molecules are actively transported into the cell by being engulfed by its membrane. All cells use endocytosis and exocytosis to transport substances that cannot passively cross the membrane. Exocytosis serves the opposite purpose by ejecting molecules from the cell.
The requirement for homeostasis ensures an equal flow all molecules into and out of a cell, like all of the body's systems. This indicates that the number of molecules exocytosis and endocytosis both equal the number of molecules into the cell. The two systems work together to maintain a balance between nutrients and waste that is necessary for normal cell growth and function. The process by which a cell takes in a large particle is called endocytosis.
Therefore, the correct option is option A.
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How many moles are equal to 89.23g of aluminum chloride, AlCl3?
Answer:
[tex]\boxed {\boxed {\sf 0.6692 \ mol \ AlCl_3}}[/tex]
Explanation:
To convert from grams to moles, we must use the molar mass. This can be calculated using the Periodic Table.
1. Molar Mass
First, identify the elements in the compound AlCl₃. They are aluminum and chlorine. Now find the masses:
Al: 26.981538 g/mol Cl: 35.45 g/molTake a look at the compound. There is a subscript of 3 after chlorine, so we must multiply its molar mass by 3 then add aluminum's.
AlCl₃= 3(35.34 g/mol) + 26.981538 g/mol = 133.331538 g/mol2. Convert Grams to Moles
We can use the molar mass as a ratio.
[tex]\frac{133.331538 \ g \ AlCl_3}{1 \ mol \ AlCl_3}[/tex]
Multiply by the given number of grams: 89.23
[tex]89.23 \ g \ AlCl_3 * \frac{133.331538 \ g \ AlCl_3}{1 \ mol \ AlCl_3}[/tex]
Flip the fraction so the grams of aluminum chloride cancel out.
[tex]89.23 \ g \ AlCl_3 * \frac{1 \ mol \ AlCl_3}{133.331538 \ g \ AlCl_3} = 89.23 \ * \frac{1 \ mol \ AlCl_3}{133.331538}[/tex]
[tex]\frac{89.23 \ mol \ AlCl_3}{133.331538}[/tex]
[tex]0.6692340112 \ mol \ AlCl_3[/tex]
3. Round
The original measurement of grams has 4 significant figures. We must round to 4 sig figs.
For the number we calculated, that is the ten thousandth place.
The 3 in the hundred thousandth place tells us to leave the 2.
[tex]0.6692 \ mol \ AlCl_3[/tex]
There are about 0.6692 moles of aluminum chloride in 89.23 grams.
What happens when two magnets rappel each other hehe
Answer:
Every magnet has two sides: a north pole and a south pole. We use these names because if you hang a magnet from a thread, the magnet’s north pole points (almost) towards the north direction.
This is because the Earth’s core (its centre) is a large, weak magnet. Your little, strong magnet lines up with Earth’s magnetic core, so it points north. That’s how a magnetic compass works.
A balloon is inflated to a volume of 1.25L .If the temperature of the air inside is cooled from 35°C to 15°C , what will be the final volume of the balloon?
Answer:
V₂ = 1.17 L
Explanation:
Given data:
Initial volume of balloon = 1.25 L
Initial temperature = 35°C
Final temperature = 15°C
Final volume = ?
Solution:
Initial temperature = 35°C (35+273.15K = 308.15 K)
Final temperature = 15°C (15+273.15 K = 288.15 K)
The given problem will be solve through the Charles Law.
Mathematical expression:
V₁/T₁ = V₂/T₂
V₁ = Initial volume
T₁ = Initial temperature
V₂ = Final volume
T₂ = Final temperature
Now we will put the values in formula.
V₁/T₁ = V₂/T₂
V₂ = V₁T₂/T₁
V₂ = 1.25 L × 288.15 K / 308.15 k
V₂ = 360.2 L.K / 308.15 k
V₂ = 1.17 L
Which of the following gases was NOT part of Earth’s original atmosphere?
Answer:anser choices
Explanation:
Answer:oxygen hahah
Explanation:
Which electron configuration is magnetic, paired or unpaired electrons
Answer:
paired electrons is magnetic configuration
How can you increase an object's kinetic energy?
As temperature changes, rocks expand and
contract. The rocks eventually break into
smaller pieces. Which process accounts for
this expansion and contraction of rocks?
Answer:
Thermal heating and cooling
Explanation:
This process described results from thermal heating and cooling as a mechanism of mechanical weathering of rock bodies.
It is often more pronounced in the arid regions of the world where there is a significant difference between day and night temperatures. With mechanical weathering, rocks are broken down into fragments by physical disintegration. During the day, the high temperature causes the rock to expand significantly. At night, the rock contracts and on the long run, joints and fractures begins to appear on the rock surface.The table shows index fossils.
A 4 row table. Row 1, CENOZOIC ERA. It is split into Quaternary Period, Pecten gibbus, and Tertiary Period, Calyptraphorus velatus. Row 2, MESOZOIC ERA. It is divided into Cretaceous Period, Scaphites hippocrepis, Jurassic Period, Perisphinctes tiziani, and Triassic Period, Trophites subbullatus. Row 3, PALEOZOIC ERA. It is divided into Permian Period, Leptodus americanus, Pennsylvanian Period, Dictyoclostus americanus, Mississippian Period, Cactocrinus multibrachiatus, Devonian Period, Mucrospirifer mucronatus, Silurian Period, Cystiphyllum niagarense, Ordovician Period, Bathyurus extans, and Cambrian Period, Paradoxides pinus. Row 4, PRECAMBRIAN, has no additional information.
Which conclusion about Paradoxides pinus is supported by the information in the table?
Life forms existed during the Cambrian period.
Similar fossil species formed after the Devonian period.
This fossil species first appeared during the Cenozoic era.
Different life forms were surviving during Precambrian time.
Answer:
A. life forms existed during the Cambrian period
Explanation:
Answer:
A
Explanation:
Have a nice day!
i swear if someone helps me with this I’ll give them the biggest hug lol
Answer:
C
Explanation:
Bc Look at it like this if norm and grav are equal aka the reason why hes not going threw the cement or flying in the air then the app and the fric are equal too or he would slip and fall
Which is a characteristic of all ions?
They are metals.
They have a charge.
They are made of two or more types of atoms.
They form chemical bonds through electron sharing.
Answer:
D. They form chemical bonds through electron sharing.
Explanation:
The correct characteristic of all ions is that they have a charge. Therefore option B is correct.
An ion is an atom or a molecule that has gained or lost electrons, resulting in an unequal number of protons and electrons. This imbalance of positive and negative charges gives the ion a net electrical charge.
Ions can have a positive charge (called cations) if they have lost electrons, or a negative charge (called anions) if they have gained electrons.
The charge of an ion is essential in determining its behavior and interactions with other ions and molecules. It influences the way ions form chemical bonds and participates in chemical reactions.
The charge of an ion is indicated by a superscript after the chemical symbol, such as Na+ for a sodium cation or Cl- for a chloride anion.
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CaCO3(s)+2H*(aq) →Ca2+ (aq)+H2001+CO262)
Initial
Initial Concentration
Experiment
Massof CaCO3(s) (grams) of Haq) (M)
1
5.00
1.0
2
5.00
2.0
Initial Temperatureof
Reactants (°C)
25.0
25.0
The initial rate of formation of CO2(e) from the chemical reaction represented by the
equation above was studied in two separate experiments. The table above provides the
experimental conditions used. If both experiments are carried out with finely powdered
samples of the solid and 50.0mL of HCl(aq), which experiment, if any, will have the faster
initial rate of formation of CO2(g) and why?
The rate of formation of CO2(g) will be the same because the mass of CaCO3(s) and the volume of
HCl(aq) used will be the same in both experiments.
CO2(g) will be formed at a faster rate in experiment 2 because more H* particles can react per
unit time.
O CO26) will be formed at a faster rate in experiment 1 because the proportion of CaCO3(s)
particles to H* particles will be greater.
The rate of formation of CO2(e) will be the same because the surface area of the solid and the
average kinetic energy of the particles will be the same in both experiments.
Answer:CO2(g) will be formed at a faster rate in experiment 2 because more H+ particles can react per unit time
Explanation:
[tex]CO_2_{(g)}[/tex] will be formed at a faster rate in experiment 2 because more H+ particles can react per unit time. The correct option is C.
What is a chemical reaction?A chemical reaction is a process that transforms one or more substances, known as reactants, to one or more different substances, known as products. Chemical elements or compounds are examples of substances.
Combination, decomposition, single-replacement, double-replacement, and combustion are the five basic types of chemical reactions.
Analyzing the reactants and products of a specific reaction will allow you to categorize it. Some reactions will fall into multiple categories.
If both experimental studies are carried out with finely powdered samples of the solid and 50.0mL of HCl (aq), then [tex]CO{_2_{(g)}[/tex] will be formed at a faster rate in experiment 2 because more H+ particles can react per unit time.
Thus, the correct option is C.
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Identify the type of the following chemical reaction.
Answer:
Hydrolysis reaction
Explanation:
What is the mass number of 199F?
Answer:
fluorine
Explanation:
hope it helps
12. What is the mass number of an atom that has 4 protons, 4 electrons, and 5 neutrons?
Answer:
9
Explanation:
mass number = protons + neutrons
= 4 + 5 = 9
Which orbital notation represents the second principal energy level of a silicon atom in the ground state?
Answer:
2
Explanation:
Silicon is one the elements found in nature and well positioned the periodic table.
It has an atomic number of 14 with an electronic configuration:
1s² 2s² 2p⁶ 3s² 3p⁴
From this formula the orbital notation that represents the second principal energy level is 2.
The main energy level in which the orbital is located or the average distance of the orbital from the nucleus is the principal quantum number.
It takes the number 1,2,3,4,5 e.t.c
what is the correct answer ??
Answer:
Quantum mechanical which is described by the Greek letter phi that describes how energy is transmitted as electrons change or jump from one shell to the next8. An element that has strong intermolecular forces is most likely to have:
•a boiling point below room temperature
•a melting point below room temperature
•a boiling point very close to its melting point
•a very high melting point
Answer:
a very high melting point answer
How many molecules are contained in 78.41 L of Ne
If 525 N of force is applied to a 4.5
kg mass, how fast will it accelerate?
Answer:
121.11m/s²
Explanation:
Given parameters:
Force = 525N
Mass = 4.5kg
Unknown:
Acceleration = ?
Solution:
From Newton's second law of motion, we can find the solution to this problem. Using the expression below:
F = m x a
F is the force
m is the mass
a is the acceleration
So'
525 = 4.5 x acceleration
Acceleration = 121.11m/s²
What is the molar mass of chlorine gas? (Hint: Be careful... the gas exists as Cl2)
Select one:
a. none of the above
b. 35.5 g
c. 71.0 g
d. 17.125 g
the calculation was like 70.90 so would it be none of the above??
10. (a) Describe how the structure of an alloy is different to a pure metal
You can type directly into this text box below: (2)
10. (b) Suggest why coins are not made of pure copper. Do not give cost as a reason.
You can type directly into this text box below: (1)
Grade 5+ 15 marks
Total 27 marks
Um, yea, please help lol
Is corona increasing or decreasing the albedo effect? Explain.
Answer:
corona is increasing
.......
Explanation:
.....
How many Molecules are in 20 grams of CO?
Answer:
2.74 x 1023 molecules of CO2.
Explanation:
There are 2.74 x 1023 molecules of CO2.
How do you determine if a polyatomic ion needs to be counted together?
Answer:
Calculate from Oxidation Number
The oxidation number of oxygen is -2, and the oxidation number of hydrogen is +1. Add together the oxidation numbers of all the atoms in the polyatomic ion. In the example, -2 +1 = -1. This is the charge on the polyatomic ion.
If the boiling point of HCl is -85 (C) and the boiling point of Hl is -36 (C),
what would be a good estimate for the boiling point of HBr? *
A cart with the weight was already moving lefgt with a constant speed when the two forces shown were applied to the car. How do the two forces affect the motion of the cart?
Explanation:
the cart will be slowed down because the weight was added to the right the cart won't stop for about 10 seconds. there will be a lot of pull and friction therefore the cart slows down drastically
Write the full electron configuration of calcium.
152 2s22p6 352 4s2
Use the electron configuration to predict the most likely oxidation state of calcium?
(Explain your answer please)
Answer: [tex]1s^22s^22p^63s^23p^64s^2[/tex] , oxidation state = +2
Explanation:
Electronic configuration represents the total number of electrons that a neutral element contains. We add all the superscripts to know the number of electrons in an atom. The electrons are filled according to Afbau's rule in order of increasing energies.
The electronic configuartion of Calcium with atomic number 20 is :
[tex]Ca:20:1s^22s^22p^63s^23p^64s^2[/tex]
As calcium can easily lose its two valence electrons to attain stability , its oxidation state is +2.
[tex]Ca^{2+}:18:1s^22s^22p^63s^23p^6[/tex]