Answer:
Metals , silver and copper which allows to pass the electricity through it is called good conductor of electricity .
hope it is helpful to you ☺️
Describe what is happening within the system when it is at equilibrium in terms of concentrations, reactions that occur, and reaction rates.
Answer:
Describe what is happening within the system when it is at equilibrium in terms of concentrations, reactions that occur, and reaction rates.
Explanation:
The chemical equilibrium state is the state where the rate of forward reaction becomes equal to the rate of backward reaction.
At this stage the change in concentration of reactants becomes equal to the change in concentration of products.
The reaction will never cease.
That is the reason chemical equilibrium is called dynamic equilibrium.
So, forward and backward reactions will be taking place continuously at equal rates.
why atoms of magnet differ from normal atoms?
Copied answers ❌❌❌
Answer:
The magnetic field of an atom, say H (one electron revolving around a proton) is composed of two separate contributions: an orbital magnetic moment and a spin magnetic moment. We get magnetic moments because of electromagnetic induction associated with each type of electron motion. The electron revolving around the proton with a certain angular momentum is related to the associated orbital magnetic moment (and, yes, we model it as a wire loop with current expressed in terms of the orbital velocity). This can be calculated using elementary mechanics. The spin magnetic moment is a little trickier because it is caused by the intrinsic spin of the electron which is a quantum phenomenon; therefore, this spin magnetic moment can only be calculated using quantum mechanics. In the end, we get a certain net magnetic moment associated with this motion of the electron in an atom. It is important to notice that this atom acts as a magnetic dipole (remember, as of yet, magnetic monopoles don't exist!).
If we take a bulk magnet like you might have on your fridge, it would be composed of atoms. Each atom operates as a magnetic dipole, but due to internal atomic structures, the atoms actually align themselves into separate magnetic domains, each with a net magnetic moment (caused my individually adding up those atomic dipole moments). In a common magnet (ferromagnet), these domains all point the same direction and stay that way, creating a permanent bulk magnetic dipole.
So in a way, there is no difference between the magnetic field of an atom and that of a magnet because one is simply a sum of the other, making both magnetic dipoles. Of course, here we see that there's nothing that fundamental about the magnetic force. In reality, the magnetic force is a relativistic effect caused by the movement of a charged particle, making electricity (i.e. charge) the underlying property at work here. Electromagnetic induction is really a shortcut to understand the magnetic force without worrying about relativistic mechanics. If we were to discover magnetic monopoles (i.e. "magnetic" charge), this would re-write a lot that we know about electromagnetism because we couldn't label all magnetic forces as by-products of moving electric charge
Which of the following belongs to VIIA?
a) Na
b) Mg
c) Cl
d) Xe
the right answer and please Quick
Answer: The answer is CL also known as chlorine
Amino acids that must be obtained through the diet are called O A) cholesterol. OB) non-essential amino acids. o C) essential amino acids. The OD) peptides.
Answer:
I belive C: essential amino acids
Explanation:
They can t be made from the body so they must be obtained my food
convert 300g into kg
Answer:
0.3kg
Explanation:
10:38 Fri 9 Jul
ES
GCSE Science - Chemistry
2 of 15
Name the indicator that is red in acid and turns green when the solution becomes neutral.
|
Answer.
Universal indicator
Explanation.
Universal indicator has many different colour changes, from red for strongly acidic solutions to dark purple for strongly alkaline solutions. In the middle, neutral pH 7 is indicated by green.
Help me with this question
Prove that:-
1.The unit of pressure is a derived unit?
2.The unit of work is a derived?
Answer:01
When you describe nature, and you need standard, useful units for everything you will see that these units are linked. So you start with defining base units that are simple:
kg, meter, second, Kelvin, …
Now other units will be automatically derived:
speed = distancetime , so the unit is ms
acceleration = speedincreasetime , so the unit is ms2
Force = Mass x acceleration, so the unit is kg.ms2
Pressure is Force/surface, so the unit is kgm.s2
You can define new simple units for this, but they are still derived from the base units:
Force: 1N=1kg.ms2
Pressure: 1Pa=1kgm.s2
2 Answer
In mechanics, work is defined as “force x distance”. Since energy can be measured as work, we can write energy = force x distance. Thus SI derived unit of energy has the units of newtons x meter or kg m2/s
aseous methane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 5.5 g of methane is mixed with 13.9 g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction. Round your answer to significant digits.
Answer:
There is 9.6 grams of CO2 produced
Explanation:
Step 1: Data given
Mass of methane = 5.50 grams
Molar mass of methane = 16.04 g/mol
Mass of oxygen = 13.9 grams
Molar mass of oxygen = 32.0 g/mol
Step 2: The reaction
CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)
Step 3: Calculate number of moles
Moles = mass / molar mass
Moles methane = 5.50 grams / 16.04 g/mol
Moles methane = 0.343 moles
Moles oxygen = 13.9 grams / 32.0 g/mol
Moles oxygen = 0.434 moles
For 1 mol CH4 we need 2 moles O2 to produce 1 mol CO2 and 2 moles H2O
O2 is the limiting reactant. It will completely react (0.434 moles).
There will react 0.434/2 = 0.217 moles CH4
There will remain 0.343-0.217 = 0.126 moles CH4
There will be produced 0.434 moles of H2O and
0.434/2 =0.217 moles of CO2
Step 4: Calculate mass of products
Mass = moles * molar mass
Mass CO2 = 0.217 moles ¨44.01 g/mol
Mass CO2 = 9.6 grams
Mass H2O = 0.434 moles * 18.02
Mass H2O = 7.8 grams
The field around a negatively charged object is symbolized by vectors pointing toward the sphere because a test charge, which is ______ by definition, would travel along such a vector if released in the field.
Positive
Negative
Answer:
Positive
Explanation:
What are this element’s chemical and physical properties? Explain how the chemical properties affect the physical properties of an element.
Answer:
What element is this. Would you mind inserting a picture or naming the element in the comments section
The biosphere is made of different kinds of matter. Which substance is an
example of inorganic matter?
O A. Iron
B. Fat
C. Glucose
D. Protein
Consider the balanced chemical equation . How many moles of H 2O are produced when 1.0 mole of C 2H 6 reacts with excess O 2
Answer:
3.0 mol H₂O
Explanation:
Step 1: Write the balanced combustion equation
C₂H₆ + 3.5 O₂ ⇒ 2 CO₂ + 3 H₂O
Step 2: Establish the appropriate molar ratio
The molar ratio of C₂H₆ to H₂O is 1:3.
Step 3: Calculate the moles of H₂O formed from 1.0 mole of C₂H₆
1.0 mol C₂H₆ × 3 mol H₂O/1 mol C₂H₆ = 3.0 mol H₂O
Which option best describes the water cycle?
. Which substance corrodes steel wool the most?
A. salt
B. acid
C. base
D. tap water
Answer:
A. Salt, hope its helped
El suero fisiológico tiene una concentración de 8,78 gr/lt. Calcula la masa de NaCl que ingresa en el organismo de un paciente al que se le administra suero durante 4 hs con una velocidad de goteo de una gota por segundo (Volumen gota: 0,05 ml)
Un paciente que recibe suero fisiológico a una velocidad de infusión de 1 gota = 0,05 ml por segundo recibirá en 5 horas 790 grs de NaCl, tomando en cuenta que la solución acuosa de suero fisiológico contiene 0,878 grs/mL de NaCl.
Explicación
Los datos que se tienen son:
Concentración de NaCl 0,878 grs/mlVolumen de la gota: 0,05 ml/gotaVelocidad de infusión 1 gota/ seg = 60 gotas/ min = 3 ml/minTiempo de infusión = 5 horas = 300 minutosYa establecidas las respectivas conversiones se trata de determinar qué volumen de suero fisiológivo se ha infundido al paciente en 5 horas
Si se infunden 3 ml cada minuto, ¿Cuánto se habrá infundido en 300 minutos?
3 ml ______________ 1 min
X ________________ 300 min
X = (300 min x 3 ml) / 1 min
X = 900 ml
Como en 5 horas el paciente ha recibido 900 ml de suero, se determina la cantidad de NaCl que se encuentra en ese volumen de líquido
0,878 grs __________ 1 ml
X ________________ 900 ml
X = (900 ml x 0,878 grs) / 1 ml
X = 790 grs de NaCl
Plz do some and show work
ASAP PLEASE HELP What is the wavelength of a photon with a frequency of 6.56 x 1014 Hz?
A. 197 nm
B. 457 nm
O C. 303 nm
D. 435 nm
Answer:
B. 47 nm is the wavelength of a photon with a frequency of 6.56 x 1014 Hz.
Answer:
B. 457 NM ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
Determine the enthalpy for the reaction A+B --> C If we know the following:
A+E --> C+D; delta H = -200 kJ
D+B --> E; delta H = -100 kJ
Explanation:
here is the answer to the question
True or false: Denaturation of an enzyme increases the rate at which it may catalyze a chemical reaction.
Mike watch 100 m north then watch 30 m south after this he walks another 10 m north what is the magnitude of his total displacement during this walk in meters
Answer:
His total displacement is 80 m northwards
Explanation:
Given;
Mike's first displacement, x₁ = 100 m North
Mike's second displacement, x₂ = 30 m South
Mike's third displacement, x₃ = 10 m North
Let his Northwards direction be positive, and
his Southwards direction be negative
His total displacement = (100 m North) + ( - 30 m South) + (10 m north)
= (100 m + 10m - 30 m)
= 80 m Northwards
Give a real-world example of an energy transformation that uses two of the following forms of energy: chemical, mechanical, nuclear, gravitational, radiant, electrical, thermal (heat), and/or sound.
Answer:
Nuclear energy gets converted into heat energy during a detonation and is also used in nuclear power plants where the heat energy form the nuclear energy gets converted into mechanical energy by converting water into steam, rotating the turbines and converting that into electrical energy
Explanation:
Or heat engines, such as the internal combustion engine used in cars, or the steam engine. (Heat - Mechanical energy)
What are the reasons for Small Island States are particularly concerned with reducing carbon dioxide emissions
Answer:
- Because it could lead to rise in sea levels which could cause heavy floods in the Small Island States and thus destroy their economies.
Explanation:
The reason is that too much carbon dioxide emissions trapped in the atmosphere can cause global worming which includes climate change and rise in sea levels.
Now, due to the fact that we know islands are lands surrounded by water, a rise in sea level of by as small as 1 metre could be very dangerous to these small islands in that they could cause them to become flooded and thus cause harm to lives and properties thereby damaging their economies.
Which compound is a glycol?
CH3―CH2―CH2―CHO
CH3—CH2—O—CH2—CH3
CH3—CH2—CH2—CH2OH
HOH2C―CH2―CH2―CH2OH
Answer:
CH3—CH2—O—CH2—CH3 is the compound of glycol.
Answer:
HOH2C―CH2―CH2―CH2OH is glycol
Explanation:
What purpose does ammonium lauryl sulfate serve when used as a surfactant? Where is it
commonly used?
Answer:
SLS functions in cleaning product as a surfactant, wetting surfaces, emulsifying or solubilizing oils, and suspending soil so that they can be rinsed away. This ingredient contributes foaming properties to cleaning products. SLS is safe for use in cleaning products.
Sodium lauryl sulfate and ammonium lauryl sulfate are surfactants that help with the mixing of oil and water. As such, they can clean the skin and hair by helping water to mix with oil and dirt so that they can be rinsed away or suspend poorly soluble ingredients in water.
Safety Information:The U.S. Food and Drug Administration (FDA) includes sodium lauryl sulfate on its list of multipurpose additives allowed to be directly added to food. Sodium lauryl sulfate and ammonium lauryl sulfate are also approved indirect food additives. For example, both ingredients are permitted to be used as components of coatings.
The safety of sodium lauryl sulfate and ammonium lauryl sulfate has been assessed by the Cosmetic Ingredient Review (CIR) Expert Panel on two separate occasions (1983 and 2002), concluding each time that the data showed these ingredients were safe in formulations designed for brief, discontinuous use, followed by thorough rinsing from the surface of the skin. In products intended for prolonged contact with skin, concentrations should not exceed 1%.
Sodium lauryl sulfate and ammonium lauryl sulfate may be used in cosmetics and personal care products marketed in Europe according to the general provisions of the Cosmetics Regulation of the European Union.
Learn more about Sodium lauryl sulfate and ammonium lauryl sulfate
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Which of the following pairs lists a substance that can neutralize Ca(OH)2 and the salt that would be produced from the reaction?
HCl and CaCl2
HClO and CaHClO
H2O and Ca(OH)3
H3PO4 and Ca(PO3)2
Answer:
Which of the following pairs lists a substance that can neutralize Ca(OH)2 and the salt that would be produced from the reaction?
HCl and CaCl2
HClO and CaHClO
H2O and Ca(OH)3
H3PO4 and Ca(PO3)2
Explanation:
The given substance is Ca(OH)2 which is a base.
To neutralise a base an acid is required.
Among the given options,
HCl and H3PO4 are the acids.
The salts foremd when calcium hydroxide reacts with the respective acids are CaCl2 and Ca3(PO4)2.
But among the given options, only the forst option that is
HCl and CaCl2 shows the correct formulas.
Hence, the answer is first option.
Answer:
HCl and CaCl2
Explanation:
What characteristic of an atom influences the behavior of the valence electron the most in an atom?
(Hint: Consider the charge of the particles)?
Answer:
The higher its electronegativity, the more an element attracts electrons.
Explanation:
Electronegativity is a property that describes the tendency of an atom to attract electrons (or electron density) toward itself. An atom's electronegativity is affected by both its atomic number and the size of the atom.
Directions: Fill in the blanks to complete the idea. 1. Constellations are group of that form pattems in the night sky 2. Ursa Major, Cassiopeia, and Orion are some common 3. Stars are used to tell and time, predict weather, and to serve as birth sign
PASAGOT PO NG MAAYOS
KAILANGAN LANG PO
BRAINLIEST+FOLLOW+HEART+POINT
BAD ANSWER-REPORT
1. Constellations are group of stars that form pattems in the night sky
2. Ursa Major, Cassiopeia, and Orion are some common constellations.
3. Stars are used to tell directions and time, predict weather, and to serve as birth sign.
how to make a sponge
Answer:
Synthetic sponges are made of three basic ingredients: cellulose derived from wood pulp, sodium sulphate, and hemp fiber. Other materials needed are chemical softeners, which break the cellulose down into the proper consistency, bleach, and dye.
Explanation:
IDK, BUT HOPE IT HELPS?
Help me please I really need this tomorrow
Answer:
answers:
1.b
2.d
3.b
4. c
5.c
6.d
7.c
Explanation:
I think this is the correct answer pls mark brainliest and like..
19. place moth balls in the closet and observe after several days.
20. whenever wax or a candle burns it turns from solid to liquid but again at room temperature it turns to solid
21. evaporation, condensation, precipitation
22. it produces new substances
23. vinegar Bubbles when baking soda is added.
24. steam
Which is a feature of a single replacement reaction?
Answer:
A typical characteristic of a single-replacement reaction is that there is one element as a reactant and another element as a product. will not because bromine is below fluorine on the periodic table. This is just one of many ways the periodic table helps us understand chemistry.
Explanation:
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