The equilibrium temperature is close to the initial temperature of water because water has a greater heat capacity compared to the hot metal, and it will require more energy to raise the low temperature of water.
The given parameters;
initial temperature of the hot metal, t₁ = 85 ⁰Cinitial temperature of the water, t₂ = 20 ⁰Cequilibrium temperature of the mixture, t = 22.25 ⁰CAccording to principle of conservation of energy, the heat lost by a hot body is equal to heat gained by a cold body.
[tex]Q_{hot} = Q_{cold}[/tex]
The equilibrium temperature is close to the initial temperature of water because water has a greater heat capacity compared to the hot metal, and it will require more energy to raise the low temperature of water.
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Do all particles pass right through the atoms undeflected?
AnswereYs
Explanatioynt:Yes
why does magnesium in an aqueous solution of magnesium chloride conduct electricity but solid magnesium chloride does not?
Answer:
Delocalized electrons
Explanation:
Magnesium Chloride is an ionic compound, so its lattice structure prevents the flow of electrons. However, when you convert the ionic compound into an aqueous solution it allows movement of electrons/ions due to the breakdown of the molecular forces which make it conductible. In short, Ionic compounds as a solid are not conductible but they are in an aqueous form.
Determinar el valor positivo de “m” para que la ecuación: x(x+2)=4mx−8 ; tenga una raíz que sea el doble de la otra.
El valor positivo de [tex]m[/tex] para que la ecuación [tex]x\cdot (x+2) = 4\cdot m \cdot x - 8[/tex] tenga una raíz que sea el doble de la otra es 2.
De acuerdo con el enunciado de esta pregunta, debemos encontrar un valor de [tex]m[/tex] a partir del siguiente sistema de ecuaciones:
[tex]r\cdot (r+2) = 4\cdot m \cdot r -8[/tex] (1)
[tex]2\cdot r \cdot (2\cdot r + 2) = 4\cdot m \cdot (2\cdot r) - 8[/tex] (2)
Ahora simplificamos el sistema de ecuaciones:
[tex]r^{2}+2\cdot r = 4\cdot m\cdot r - 8[/tex] (1b)
[tex]4\cdot r^{2}+4\cdot r =8\cdot m\cdot r - 8[/tex] (2b)
Despejamos [tex]m[/tex] en cada expresión, lo eliminamos y resolvemos el polinomio resultante:
[tex]\frac{r^{2}+2\cdot r + 8}{4\cdot r} = \frac{4\cdot r^{2}+4\cdot r +8}{8\cdot r}[/tex]
[tex]r^{2}+2\cdot r + 8 = 2\cdot r^{2}+2\cdot r +4[/tex]
[tex]r^{2}-4 = 0[/tex]
[tex]r^{2} = 4[/tex]
[tex]r = \pm 2[/tex]
Finalmente, determinamos el valor de [tex]m[/tex], que al ser positivo, debemos utilizar [tex]r = 2[/tex]:
[tex]m = \frac{2^{2}+2\cdot 2 + 8}{4\cdot 2}[/tex]
[tex]m = 2[/tex]
El valor positivo de [tex]m[/tex] para que la ecuación [tex]x\cdot (x+2) = 4\cdot m \cdot x - 8[/tex] tenga una raíz que sea el doble de la otra es 2.
Invitamos cordialmente a ver esta pregunta sobre polinomios de segundo orden: https://brainly.com/question/15792293
BRAINLIEST
How many DIFFERENT elements are involved in the equation shown below?
Answer:
5
Explanation:
The elements contained in this equation are:
Na
Cl
H
S
O
The electron configuration for Helium (He) is shown below.
1s2
Which diagram shows the correct distribution of electrons in the electron shells of a helium atom?
Answer:
3rd image
Explanation:
How mang millimoles of solute are contained in 2.00L of 2.76×10^-3 M of KMnO4
Answer:
5.52
Explanation:
2.76 10^-3 M = 2.76mM
2.76mM*2L= 5.52mmol
Which set of laboratory equipment would most likely be used with a crucible
Answer:
That should be crucible tong
write True If the statement Is Correct And False If Not
Answer:
11.false12.true13.true14.false15.true16.false17.false18.false19.true20.false21.PC22.CC23.PC24.CC25.CCExplanation:
I think it is helps you
c) ¿Qué ocurriría si tenemos disueltos 200 g de
nitrato de potasio en 300 g de agua a 60°C
y enfriamos la disolución hasta los 10 °C?
Which statement best describes how inflating a balloon is evidence of matter?
O It changes color and length.
o It changes mass and temperature.
o It changes size and shape.
O It changes texture and width.
Answer:
It changes size and shape
Explanation:
Proving Air Is Matter
One way to prove that air is made of matter is to blow up a balloon. Before you add air into the balloon, it is empty and shapeless. When you puff air into it, the balloon expands, so you know it is filled with something—air is taking up the space.
What causes streams to form?
O absorption
O precipitation
O glaciers
O lakes
Answer: essay the answer is B: precipitation
Explanation:
can anyone tell me "what are the exceptions of law of reciprocal proportions??"
Question
How are chemical equations balanced?
Answer:
According to the law of conservation of mass, when a chemical reaction occurs, the mass of the products should be equal to the mass of the reactants. A balanced chemical equation occurs when the number of the atoms involved in the reactants side is equal to the number of atoms in the products side
How didMendeleev feel about Russian science education when he came back from Germany?
While he was researching and writing that book in the 1860s, Mendeleyev made the discovery that led to his most famous achievement. He noticed certain recurring patterns between different groups of elements and, using existing knowledge of the elements' chemical and physical properties, he was able to make further connections. He systematically arranged the dozens of known elements by atomic weight in a grid-like diagram; following this system, he could even predict the qualities of still-unknown elements. In 1869, Mendeleyev formally presented his discovery of the periodic law to the Russian Chemical Society.
Hope This is Ok :)
There is 200 grams of water on a stove. The water is currently 25 C. How much energy in joules must be used to raise the water to 90 C?
Answer:
q
=
64 kJ this is answer. .
chemistry neeeeeeed help!
4. O²-
EXPLANATION
O²- has 16 electrons while Ne has 18 electrons. O²- is a molecule that has one electron added to each atom, meaning that there are two extra electrons which makes O²- the same electron configuration as of Ne atom.
đơn chất nào sau đây tác dụng với dung dịch axit sunfuric loãng sinh ra khí ?
a đồng
b cacbon
c nhôm
d lưu huỳnh
Answer:
C. Al
Explanation:
2Al+ 3H2SO4(l)------> Al2(SO4)3+ 3H2
24) When salt and water are mixed, they form a solution like in the ocean. When sand and
water are mixed, they form a mixture where the sand does not dissolve. Which statement
might summarize this observation?
A) Mixtures and solutions are the same.
B) All substances mixed with water are solutions.
In mixtures, you cannot see the separate substances.
D) In solutions, you cannot see the separate substances.
I think the answer is d if I'm wrong I'm So so so sorry
a brief description of atoms and how they relate to
molecules and compounds
Answer:
Explanation:
Atoms are the thing that make up molecules and compounds. Molecules contain two or more atoms and are held together by covalent bonds
One of the few resources on Mars is
Answer:
iron .. titanium.. nickel....aluminum... sulfur... and calcium
HEEELP PLEASE HELP ASAP WILL AWARD BRAINLIEST What is the IUPAC name for this compound?
Answer:
The Correct IUPAC name is H3C - CH (CH3) - CH (C2H5) - (CH2)2 - CH3 Class 11
Explanation:
yes searched np is maybe right i not 100% sure i 50% is it right >:) tell if u got it right >:D
Answer:
4-ethyl-6-methyl-3-heptene
Explanation:
Longest chain is seven long so it is heptane
But there is a double bond, so that becomes heptene
The double bound starts on the third carbon, so it is 3-heptene (this tells us where the double bond is)
Now we just got to do the substituents!
There is a ethyl group of the fourth carbon and then a methyl group on the sixth!
Ergo, 4-ethyl-6-methyl-3-heptene
____ are the forces of attraction between positive metal ions and the valence electrons that surround them.
The forces of attraction that exists between positive metal ions and their surrounding valence electrons is called: metallic bonds.
A chemical bond can be defined as the forces of attraction that exists between ions, crystals, atoms or molecules and they are mainly responsible for the formation of all chemical compounds.
In Chemistry, there are different types of chemical bonds and these are:
Hydrogen bonds.Covalent bonds.Ionic bonds.Metallic bonds.A metallic bond can be defined as the forces of attraction that exists between positive metal ions and their surrounding valence electrons.
This ultimately implies that, metallic bond are peculiar to positively charged metals but not negatively charged metals or non-metals.
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Ow is the relatively high melting point of sodium chloride related to its structure at the atomic scale? Observe sodium chloride crystals with a hand lens. Use your observations and the model of sodium chloride to support your claim.
Answer:
see explanation
Explanation:
How is the relatively high melting point of sodium chloride related to its structure at the atomic scale? Observe sodium chloride crystals with a hand lens. Use your observations and the model of sodium chloride to support your claim.
Unlike the raltively low melting point of water (100 °C), NaCl has a much higher melting point (801 °C),.
Theater molecules in ice are held together by hydrogen bonds, which are relatively weak.
The ions in NaCl are held together by ionic bonds, whose electrostatic ,force is much greater.
The crystal structure makes the force even greater.
imagine a chloride ionin a NaCl crystal.
It has Na ions in front, behind, to the left, to the right, above and below.
Likewise the Na ion has Cl ions in front, behind, to the left, to the right, above and below.
It takes a lot of energy to berak these bonds and temprature is a measure of energy.
if you try the experiment make certain you are undr a fune hood and wear protective loves and apron. 801 °C can seriously burn skin and clothing
The temperature at which the liquid and the solid of refined compounds and elements can occur stable and in equilibrium is called the melting point.
How are the structure and the melting point related?Water has a relatively lower melting point of 100 °C compared to [tex]\rm NaCl[/tex] at 801 °C which has a much higher melting point. The water molecules in ice are bonded jointly by somewhat weak hydrogen bonds.On the other hand, [tex]\rm NaCl[/tex] ions are bonded together by ionic bonds, that has a greater electrostatic force and its crystal structure produces the force to be even more prominent.When a sodium and chloride ion is imagined in the [tex]\rm NaCl[/tex] crystal the sodium ions are present above, below, left and right of the structure and the chloride ions are similarly placed in the crystal structure.This type of structure needs a lot of energy to break and hence the melting point of the salt is more compared to the water.
Therefore, the melting point is related to the structural organization of the atoms.
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A new element has been discovered. Scientists are trying to determine where it should it be placed on the periodic table. In order to do this they must determine the following about the element:
Elements are placed in order on the periodic table based on their atomic number, how many protons they have. In a neutral atom, the number of electrons will equal the number of protons, so we can easily determine electron number from atomic number.
Please help I will give brainliest ;3
Answer:
oxygen, carbondioxide
carbondioxide, oxygen
carbon reduction process is not applied for extraction of alkali metal . why ?
Answer:
The alkali metals are the highly electropositive metals. Highly electropositive metals cannot be extraction carbon reduction process, because these metals do not react with carbon
Explanation:
concepts of oxidation numbers and how to learn them
Answer:
yes is it yes yes yes yes yes yes yes yes yes yes
How many different types of atoms are in the formula Ba(OH)2 • 8H2O?
A)3
B)2
C)11
D)22
What is the mass of 1,300 cm of gasoline? The density of gasoline is 0.67 g/cm.
Answer:
Volume x Density = Mass of a substance
1300 x 0.67 = 871
The mass is 871 (unit)
Describe the nucleus of the
atom.
Answer:
The nucleus of atom is composed of two subatomic particles that each have charges.
Protons, which are positively charged particles.Neutrons, which are neutrally charged particles.Both reside in the nucleus of an atom. The amount of protons and neutrons (Electrons can to) is what helps us identify each atom apart. Electrons are NOT in the nucleus of atom but orbit it in outer layers called orbitals.
