Answer:
Physical changes involve states of matter and energy.
Explanation:
No new substance is created during a physical change, although the matter takes a different form. The size, shape, and color of matter may change. Physical changes occur when substances are mixed but don't chemically react.
The characteristics that can be changed in the physical change has been shape or size of the compound.
Change in the element has been classified as chemical and physical change. The chemical change has been given as the change in the chemical composition of the elements.
The physical change has been the change in the state and form of the element, that has been reversible.
The characteristics that can be changed in the physical change has been shape or size of the compound.
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Match the words to the correct descriptions.
Have different properties depending on the number of protons.
The ingredients maintain their properties when they are placed together or taken apart.
The atoms take on new properties when they bond together or are separated.
1.
Compounds
2.
Mixtures
3.
Atoms
Answer:
1. Atoms, Have different properties depending on the number of protons.
2. Mixtures, The ingredients maintain their properties when they are placed together or taken apart.
3. Compounds, The atoms take on new properties when they bond together or are separated.
Explanation:
The nuclear equation is incomplete. Superscript 239 Subscript 94 Baseline P u + Superscript 1 Subscript 0 Baseline n yields Superscript 100 Subscript 40 Baseline Z r + blank + 2 Superscript 1 Subscript 0 Baseline n What particle completes the equation? Superscript 138 Subscript 54 Baseline X e Superscript 139 Subscript 54 Baseline X e Superscript 119 Subscript 54 Baseline X e Superscript 138 Subscript 52 Baseline T e
Answer:
The correct option is the first option
Explanation:
The equation described in the question is shown below
²³⁹₉₄Pu +¹₀n ⇒ ¹⁰⁰₄₀Zr + blank + 2¹₀n
This equation is a nuclear fission because it involves the splitting of a heavy nucleus, Plutonium (Pu), into smaller nuclei, Zirconium (Zr) and an unknown nuclei.
The law of conservation of matter states that matter can neither be created nor destroyed hence in other to get the missing atom, we must know the total number of subscripts (mass number) and superscripts (atomic number) on both sides.
The total mass number on the reactant side is 239 + 1 = 240
The total atomic number on the reactant side is 94 + 0 = 94
While, The total mass number on the product side is 100 + 2(1) = 102
The total atomic number on the product side is 40 + 2(0) = 40
To determine the missing atom, you subtract the the total atomic number of the product from that on the reactant side; 94 - 40 = 54
The atom with the atomic number 54 is Xenon,
To determine the mass number of the xenon isotope involved, you subtract the the total mass number of the product from that on the reactant side; 240 - 102 = 138.
Hence, the particle that completes the equation is ¹³⁸₅₄Xe, the first option
Answer: A on edge
Explanation:
the person above me explained it well but i wanted to shorten it.
What is the name of the ionic compound CaCN?
Answer:
Calcium cyanamide
Explanation:
I think it has to be calcium cyanide, because of the cyanamide ion (CN).
How many oxygen atoms are there in 3 molecules of CH3FO?
Answer: There should be 3.
Explanation:
What is the correct name for LiF?
Answer:
Lithium Fluoride.
Explanation:I know science.
At point R, rocks melt underground to form magma. Which is another process that contributes to the formation of rock at point R?
compacting of sediments on the mountain
cooling as the lava runs down the mountain
weathering of the mountain from the environment
eroding of different rocks at the base of the mountain
Another process that contributes to the formation of rock at point R is the:
B. Cooling as the lava runs down the mountainAccording to the given question, we need to find another process which can help with the rock formation at point R where the rock melts underground to form magma.
As a result of this, another process through which makes a significant contribution to the formation of rock at point R is the cooling of the lava as the magma which has been melted runs down the mountain.
Therefore, the correct answer is option B
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i neeeed helllpppsss
Answer:
Kg / m ^3. options no 2OR Kilograms per cubic metre is the corret answer
It helps you......
. Thank you ☺️☺️
PLEASE HELP ASAP!!!
P-3 has how many electrons?
-15
-12
-18
-none of these
the density of granite is approximately 2.7 grams per cubic centimeter. what would be the approximate mass of a cube of granite 10.0 centimeters on a side
Given parameters:
Density = 2.7g/cm³
Length of the cube = 10cm
Unknown:
Mass of the cube = ?
Solution:
Density is the mass per unit volume of a substance.
Density = [tex]\frac{mass}{volume}[/tex]
Mass = density x volume
We need to find the volume of the cube;
Volume of the cube = L³
where L is the length of the cube;
Volume of the cube = 3³ = 27cm³
So, the mass of the granite = 2.7 x 27 = 72.9g
The granite has a mass of 72.9g
How many electron domains does IF4+ have?
how much protons, neutrons, and electrons does iodine-132 1- ion have
The number of protons, neutrons, and electrons is iodine-132, Iodine has 53 protons and 53 electrons as it has no charge the number of protons equals the number of electrons. Iodine-131 has 131 protons as well as neutrons.
What are protons?Protons are subatomic particles that have a positive charge. The strong nuclear force holds protons together in the nucleus of an atom. Neutrons are non-charged subatomic particles (they are neutral).
A proton is a subatomic particle found in every atom's nucleus. The particle has a positive electrical charge that is equal to and opposite to the electron's.
Iodine-132 is the number of protons, neutrons, and electrons. Iodine has 53 protons and 53 electrons because it has no charge, so the number of protons equals the number of electrons. Iodine-131 contains 131 protons and neutrons.
Thus, there will be 131 protons as well as neutrons in iodine-131.
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Why do isotopes of the same element have the same atomic size?
Answer:
Isotopes of any given element all contain the same number of protons, so they have the same atomic number (for example, the atomic number of helium is always 2). Isotopes of a given element contain different numbers of neutrons, therefore, different isotopes have different mass numbers.
The atomic size of an element significantly depends on the number of protons. It is the characteristic property of isotopes that they possess the same number of protons which is responsible for the same atomic size.
What are Isotopes?Isotopes may be defined as one of two or more species of atoms of a chemical element that have the same atomic number and location in the modern periodic table with identical chemical behavior but with different atomic masses and physical properties.
In a more simple sense, isotopes are those elements that have the same atomic number but different atomic mass. The atomic number depends on the number of protons which remains constant in isotopes. So, the isotopic elements have identical atomic sizes.
Therefore, the isotopes of the same element have the same atomic size.
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If the input force applied to one end of a first-class lever is 8 N, and the fulcrum is located 6 m away from the input force but 3 m away from the output force, what will be the resulting output force?
Answer:
16 N
Explanation:
The ratio of output force to the input force is called mechanical advantage of the lever. Also, the ratio of input arm distance to the output arm distance is called mechanical advantage of the lever.
We have,
Input force = 8 N
Input arm distance = 6 m
Output arm distance = 3 m
We need to find the resulting output force. So,
[tex]\dfrac{F_o}{8}=\dfrac{6}{3}\\\\F_o=16\ N[/tex]
So, the resulting output force is 16 N.
Identify the group number of following oxides/hydrides in Mendeleev
periodic table:
i) R2O3 ii) R2O iii) RO2 iv) RH2 v) R2O7 vi) RH3
Answer:
See explanation
Explanation:
The oxides or hydrides are formed by exchange of valency between the two atoms involved. The group of the atom bonded to oxygen or hydrogen in the binary compound can be deduced by considering the subscript attached to the oxygen or hydrogen atom.
Now let us take the journey;
R2O3- refers to an oxide of a group 13 element, eg Al2O3
R2O - refers to an oxide of group a group 1 element e.gNa2O
RO2 - refers to an oxide of a group 14, 15 or 16 element such as CO2, NO2 or SO2
RH2 - refers to the hydride of a group 12 element Eg CaH2
R2O7 - refers to an oxide of a group 17 element E.g Cl2O7
RH3- refers to a hydride of a group 13 element E.g AlH3
Expressed to the correct number of significant figures, what is the correct sum of (3.04g + 4.134g + 6.1g)?
Answer:
13.3g
Explanation:
3.04g + 4.134g + 6.1g = 13.274g
=13.3g
When expressing the correct number of significant figures in addition, you go to the last common decimal place. In this case that is 0.1 because all the numbers have this decimal place.
This is because your measurement can only be as precise as the least precise measurement. The more decimal places in the measurement, the more precise the measurement.
the food into energy for her muscles? *
O thermal
O physical
O chemical
Answer:
chemical
Creatine Phosphate (with oxygen) So all muscle cells contain a high-energy compound called creatine phosphate which is broken down to make more ATP quickly. Creatine phosphate can supply the energy needs of a working muscle at a very high rate, but only for about 8–10 seconds.adenosine triphosphate (ATP)
The source of energy that is used to power the movement of contraction in working muscles is adenosine triphosphate (ATP) – the body's biochemical way to store and transport energy. However, ATP is not stored to a great extent in cells
*ANSWER FAST AND YOU WILL GET BRAINLIEST* -
According to le châteliers principle how would a change in pressure affect a gaseous system in equilibrium?
A. All equilibrium interactions would stop
B. The equilibrium would shift in the direction of the change
C. The number of both reactants and products would increase
D. The equilibrium would shift to reduce the pressure change
Answer:
D.
Explanation:
Answer:
The correct answer is d. i took the test and got it right
Explanation:
Which of these statements is true about a neutral atom of chromium (Cr)? help
A.has more protons than electrons
B. has fewer subatomic particles than an atom of iron (Fe)
C.has 52 protons and 52 electrons
D.has more electrons than neutrons
Answer : The correct option is, (B) has fewer subatomic particles than an atom of iron (Fe) .
Explanation :
The given element is chromium (Cr). The atomic number of chromium is 24.
As we know that the atomic number is either equal to the number of protons or number of electrons.
So, Atomic number = Number of protons = Number of electrons = 24
And we know that mass number is the sum of number of protons and number of neutrons.
Mass number of chromium = 52
Mass number = Number of protons + Number of neutrons
52 = 28 + Number of neutrons
Number of neutrons = 28
And we know that the atomic number of iron (Fe) is 26.
Number of protons = Number of electrons = 26
Mass number of Fe = 56
Number of neutrons = 30
From the given options we conclude that the a neutral atom of chromium has fewer subatomic particles than an atom of iron (Fe).
Hence, the correct option is, (B) has fewer subatomic particles than an atom of iron (Fe) .
True
False
Unlike gases, solids cannot
be compressed to a smaller
volume
Similar to the structure of
solids, atoms within a liquid
are in a fixed or locked
position
Both solids and liquids have
a fixed (unchanging) physical
shape
Both solids and liquids have
a fixed (unchanging) volume
Gases have a fixed
(unchanging) volume, shape,
and structure
Answer: True
Explanation:
The largest ruby in the world is 10.9 cm long, 9.10 cm wide, and 5.80 cm thick, giving it an overall volume of 575 cm3. If the density of ruby—a form of aluminum oxide—is 3.97 g/cm3, what is the mass of the largest ruby?
Given parameters:
Volume of the ruby = 575cm³
Density of the ruby = 3.97g/cm³
Unknown:
Mass of the largest ruby = ?
Solution:
Density is the mass per unit volume of a substance. It is an intrinsic property of matter that is unique to each of them.
Mathematically;
Density = [tex]\frac{mass}{volume}[/tex]
Since mass is the unknown;
Mass = density x volume
Input the parameters and solve;
Mass = 3.97 x 575 = 2282.75g
The mass of the largest ruby is 2282.75g
Carbon-14 has a half-life of 5730 years. How much of a 144 g sample of carbon-14 will remain after
1.71910 years
Answer:
i miss you
Explanation:
An object accelerates 4.0 m/s2 when a force of 10 newtons is applied to it. What is the mass of the object
Answer:
The answer is 2.5 kgExplanation:
The mass of the object can be found by using the formula
[tex]m = \frac{f}{a} \\ [/tex]
where
f is the force
a is the acceleration
We have
[tex]m = \frac{10}{4} = \frac{5}{2} \\ [/tex]
We have the final answer as
2.5 kgHope this helps you
Melting can be best described as a process in which molecules
lose kinetic energy and move slowly.
lose kinetic energy and remain stationary.
gain kinetic energy and escape into the atmosphere.
gain enough kinetic energy to get past each other.
Answer:
Your answer is D (gain enough kinetic energy to get past each other.)
Explanation:
Melting can be best described as a process in which molecules gain enough kinetic energy to get past each other and the correct option is option D.
What is melting?
Melting is the process by which a substance changes from the solid phase to the liquid phase. Melting is also known as fusion, although this term has several meanings in science.
Melting occurs when the kinetic energy of a solid increases by application of heat or pressure, such that the molecules of solid start vibrating faster but stay close to their neighboring particles, rolling around each other. This particle movement allows the substance to flow and form a liquid.
Therefore, melting can be best described as a process in which molecules gain enough kinetic energy to get past each other and the correct option is option D.
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A 45.0 g coin of copper absorbed 45 calories of heat. What was the final
temperatuře of the copper if the initial temperature was 25°C? The specific heat
of copper is 0.092 cal/g°C. *
It is determined that a metal sample contains 0.251 moles of iron. How many iron atoms are in the sample?
Given parameters:
Number of moles of iron = 0.251 moles
Unknown:
Number of atoms = ?
Solution:
A mole of an atom contains the Avogadro's number of particles;
Avogadro's particles = 6.02 x 10²³ atoms
1 mole of atom = 6.02 x 10²³ atoms
0.251 moles = 0.251 x 6.02 x 10²³ = 1.51 x 10²³ atoms
The number of atoms here is 1.51 x 10²³ atoms
The number of atoms in 0.251 mol of Iron sample has been [tex]1.51\;\times\;10^2^3[/tex].
The number of atoms in a mole of sample has been given by the Avogadro law. According to the Avogadro law, the number of atoms in 1 mole of sample has been equivalent to the Avogadro number.
The Avogadro number has been a constant quantity with the value of [tex]6.023\;\times\;10^2^3[/tex].
Computation for Iron atomsThe given mole of iron has been 0.251 mol.
The number of atoms in the sample has been given as:
[tex]\rm 1\;mol=6.023\;\times\;10^2^3\;atoms\\ 0.251\;mol=0.251\;\times\;6.023\;\times\;10^2^3\;atoms\\ 0.251\;mol=1.51\;\times\;10^2^3\;atoms[/tex]
The number of atoms in 0.251 mol of Iron sample has been [tex]1.51\;\times\;10^2^3[/tex].
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why do you think people believed ________ over ________? Think about the structure of society during that time period
Answer:
Is there any other details to help with the question?
First correct answer will get brainliest
O the elements that make up glucose are different than the elements that make up ethanol.
O the ratio of the elements is different in ethanol than in glucose.
O the chemical properties of the elements that make up the compounds are different.
O glucose has more elements than the ethanol.
Answer:
the second one
Explanation:
becuase i asked my teacher
Answer:this ? 2end one
Explanation:
Question 1 (1 point)
How many atoms are in 223 g of cesium?
Answer : The correct option is (b) [tex]1.01\times 10^{24}[/tex]
Explanation : Given,
Mass of cesium = 223 g
Molar mass of cesium = 133 g/mole
First we have to calculate the moles of cesium.
[tex]\text{Moles of cesium}=\frac{\text{Given mass cesium}}{\text{Molar mass cesium}}[/tex]
Now putting all the given values in this formula, we get:
[tex]\text{Moles of cesium}=\frac{223g}{133g/mol}=1.67mol[/tex]
Now we have to calculate the number of atoms of cesium.
As, 1 mole of cesium contains [tex]6.022\times 10^{23}[/tex] atoms of cesium
So, 1.67 mole of cesium contains [tex]1.67\times 6.022\times 10^{23}=1.01\times 10^{24}[/tex] atoms of cesium
Therefore, the number of atoms of cesium are [tex]1.01\times 10^{24}[/tex]
How much pressure is in the transition zone? Just need the answer.
☆<《 HOPE IT WILL HELP YOU 》>☆
Explanation:
The transition zoneis the part of Earth's mental. It is located between the lower mental and upper mental. It is between the depth of 410km TO 660km
When Liza was reading over the “Best of Blueberries” article, she quickly changed the claim in the article that read “1 cup of blueberries contains around 180 calories” because 1 cup of blueberries actually only contains about 80 calories. What does Liza MOST LIKELY do for a living?
researcher/fact checker
copy editor
commissioning editor
editorial expert
Answer:
your Answer is The first one, Its A, resercher/ fact checker
Explanation: