Answer:
Molarity of the solution = 3.000 M
Volume of the solution = 250.0 mL = 0.25 L
moles in 250.0 mL = molarity x volume of the solution
= 3.000 M x 0.25 L
= 0.75 mol
Hence, 0.75 mol of NaCl is needed to prepare 250.0 mL of 3.000 M NaCl solution.
Moles (mol) = mass (g) / molar mass (g/mol)
Moles of NaCl in 250.0 mL = 0.75 mol
Molar mass of NaCl = 58.44 g/mol
Mass of NaCl in 250.0 mL = Moles x Molar mass
= 0.75 mol x 58.44 g/mol
= 43.83 g
Hence, 43.83 g of NaCl is needed to prepare 250.0 mL of 3.000 M solution.
Explanation:
PLLZZZZ HELPPPP IT IS A TIME ASSIGNMENT !!!
Answer:
plato is the answer
Explanation:
that what i think it it is
Does anyone know how kinetic energy and crater diameter are related??
Answer:
Crater size is related to the mass and velocity of the impacting body. Mass and velocity can be combined to find the kinetic energy of an impactor. ... This fundamental physical relationship allows an estimate of impactor mass to be made from crater diameter.
Explanation:
The charge of the Fe ion in the compound FeO is blank
The charge of the Fe ions in the compound Fe2O3 is
blank
Answer:
For Feo is 2+
For Fe2O3 is 3+
Btw I did it and got it right!
Explanation:
The charge of the Fe ion in the compound [tex]\rm FeO[/tex]is +2 and the charge of the Fe ions in the compound [tex]\rm Fe_2O_3[/tex] is +3, respectively.
Ion can defined as any atom or molecule having positive or negative charge on it.
In [tex]\rm FeO[/tex]: In the compound, oxygen is in group 16 and has a charge of -2, the iron ion must have a charge of +2 to balance the charges and make the compound neutral.
In [tex]\rm Fe_2O_3[/tex]: In the compound, oxygen is in group 16 and has a charge of -2, the three oxygen atoms in [tex]\rm Fe_2O_3[/tex] contribute to a total charge of -6. To make the compound neutral, the two iron ions must have a total charge of +6. Therefore, each iron ion must have a charge of +3 to balance the charges and make the compound neutral.
Therefore, Fe ion has a charge of +2 in the compound [tex]\rm FeO[/tex] and has a charge of +3 in the compound [tex]\rm Fe_2O_3[/tex].
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What are the layers of earth including the lithosphere and the asthenosphere?
Answer:
The lithosphere is the solid, outer part of the Earth. The lithosphere includes the brittle upper portion of the mantle and the crust, the outermost layers of Earth's structure. It is bounded by the atmosphere above and the asthenosphere (another part of the upper mantle) below
Explanation:
They are, in order from the exterior to the interior – the crust, the mantle, the outer core, and the inner core.
A student mixes a dark green solution with water, and the result is pale green. Is this likely a chemical change or not? Explain.
Answer:
This is not a chemical change
Explanation:
The dark green solution mixed with the water, but the water is still water. There were no bubbles, smell, temperature change, or any other signs of a chemical change
Have a great day!
A student mixes a dark green solution with water, and the result is pale green. This is a physical change.
What are physical change and chemical change?Composition distinguishes a physical change from a chemical change. A physical change is a difference inside the look, smell, or straightforward presentation of a material sample without the need for a change in composition, whereas a chemical change alters the makeup of the substances in issue.
Despite the fact that we refer to them as physical "reactions," nothing is actually changing. A change in the substance in question's elemental composition is necessary for a reaction to occur. So, from now on, we will simply refer to bodily "reactions" as physical changes. A student mixes a dark green solution with water, and the result is pale green. This is a physical change.
Therefore, a student mixes a dark green solution with water, and the result is pale green. This is a physical change.
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If the sun is out all day, why is it not warm during an Arctic summer?
Answer:
The primary reason is that the sun is low on the horizon all day. Thus, solar energy needs to pass through more atmosphere to get to the ground.
Explanation:
Hope this helps. :)
Answer:
Most all of the visible light striking the snow or ice surface is reflected back without any particular preference for a single color. Most natural materials absorb some sunlight, which gives them their color. Clean snow, however, reflects most of the sunlight, creating a white appearance.
[ I commented on the other answer with the same little add-on, then I realised I could add an answer. Even though this is four days ago, meaning the person who asked the question doesn't need another answer, I hope to give someone else who might be looking at this some insight. ]
How can you tell if an ion is a polyatomic ion if all you have is the name?
I can't seem to figure this out! Please help me out!
:)
Answer:
All the elements on the periodic table start with a capital letter and only some of them have a second letter that is lower case. So if you see two capital letters together in a ion then you will know that it is a polyatomic.
Answer: All the elements on the periodic table start with a capital letter and only some of them have a second letter that is lower case. So if you see two capital letters together in a ion then you will know that it is a polyatomic.
Explanation:
A sample of gas is collected over water at a temperature of 35.0◦C when the barometric pressure reading is 642 torr. What is the partial pressure of the dry gas, given PH2O = 42.2 torr? Answer in units of torr.
Answer: The partial pressure of the dry gas is 599.8 torr
Explanation:
According to Dalton's law, the total pressure is the sum of individual pressures.
[tex]p_{total}=p_{dry gas}+p_{H_2O}[/tex]
Given : [tex]p_{total}[/tex] =total pressure of gases = 642 torr
[tex]p_{dry gas}[/tex] = partial pressure of dry gas = ?
[tex]p_{H_2O}[/tex] = partial pressure of water = 42.2 torr
putting in the values we get:
[tex]642torr=p_{\text {dry gas}}+42.2torr[/tex]
[tex]p_{\text {dry gas}}=599.8torr[/tex]
Thus the partial pressure of the dry gas is 599.8 torr
Is farting an example of an exothermic reaction?
*for real though I have never heard of a cold fart
Answer:
i would assume i mean who has cold farts
Explanation:
Yes, farting is an example of an exothermic reaction.
What is an exothermic reaction?A reaction that is chemical in nature and is characterized by the release of energy in the form of heat or light is called an exothermic reaction.
Farting is a normal part of digestion that reflects the activity of the bacteria in your gut.
Yes, farting is an example of an exothermic reaction.
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In the Haber reaction shown below, _______?is the
limiting reactant if equal moles of each reactant are used.
3H2 + N2 -> 2NH3
Answer: hydrogen
Explanation:
Calculate the heat absorbed when 68.8 g of ice at -30.0 c is converted to steam at 160 c
Answer: 219 kJ
Explanation:
What does the root “thermal” mean?
Please Help
I will give you Brainliest
Answer:
If it has to do with heat, it's thermal. ... The Greek word therme, meaning “heat,” is the origin of the adjective thermal. Something that is thermal is hot, retains heat, or has a warming effect.
Explanation:
hope it helps :)
A 7.0 L sample of gas begins at 2.5 atm and 320. K. What is the new pressure if the temperature is changed to 273 K and the volume remains constant at 7.0 L?
Answer:
2.1 atm
Explanation:
We are given the following variables to work with:
Initial pressure (P1): 2.5 atm
Initial temperature (T1): 320 K
Final temperature (T2): 273 K
Constant volume: 7.0 L
We are asked to find the final pressure (P2). Since volume is constant, we want to choose a gas law equation that relates initial pressure and temperature to final pressure and temperature. Gay-Lussac's law does this:
[tex]\frac{P_{1}}{T_1} =\frac{P_{2}}{T_2} \\[/tex]
We can rearrange the law algebraically to solve for [tex]P_{2}[/tex].
[tex]{P_{2}} =\frac{(T_2)(P_{1} )}{T_1} \\[/tex]
Substitute your known variables and solve:
[tex]P_2 = \frac{273K(2.5atm)}{320K} = 2.1 atm[/tex]
How many particles are in 1 mole of CO2?
What mass of methane (CH4) gas occupies a volume of 0,462 L at 1atm and 273K
Explanation:
Since methane gas is at 1 atm and 273 K, it is at standard temperature and pressure(STP).
One mole of every gas occupies 22.4 dm^3 at STP, and vice versa. So,
22.4 dm^3 at STP of CH4=1 mol=12+4(1)=16 g
0.462 L(0.462 dm^3) at STP of CH4
=(16 g×0.462 dm^3)/22.4 dm^3
=0.33 g
El ácido sulfúrico H2SO4 es uno de los compuestos que se utiliza para la producción de fertilizantes como el nitrosulfato amónico. Si disponemos de 8 mL de H2SO4 al 37 %P/P (d=1,26 g /mL), los cuales se disolvieron hasta alcanzar un volumen de solución de 400 mL, con una densidad de 1,08 g/mL. (La densidad del soluto es corresponde a 1,83 g/cm³)
Explanation:
12 hours ago
El ácido sulfúrico H2SO4 es uno de los compuestos que se utiliza para la producción de fertilizantes como el nitrosulfato amónico. Si disponemos de 8 mL de H2SO4 al 37 %P/P (d=1,26 g /mL), los cuales se disolvieron hasta alcanzar un volumen de solución de 400 mL, con una densidad de 1,08 g/mL. (La densidad del soluto es corresponde a 1,83 g/cm³)
Your car burns gasoline as you drive up a large mountain. What energy
transformation is the car performing?
O A. Chemical energy to kinetic energy and gravitational potential
energy
B. Kinetic energy to chemical energy and light energy
C. Chemical energy to kinetic energy and nuclear energy
D. Gravitational potential energy to sound energy and nuclear energy
SUBNI
Answer:
chemical energy to kinetic energy
Explanation:
Answer:
A. Chemical energy to kinetic energy and gravitational potential
energy
Explanation:
2Na + 2H2O → 2NaOH+ H2
How many grams of sodium would be needed to produce 1.00kg of sodium hydroxide?
Answer:
575 g
Explanation:
1 kg of sodium hydroxide is 1000/40=25 mol.
So 25 mol of sodium will be needed.
25 mol of sodium is 575 g.
According to the stoichiometry of the given chemical equation, 575 g s of sodium would be needed to produce 1.00 kg of sodium hydroxide.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
46 g sodium gives 80 g sodium hydroxide, thus 1000 g sodium hydroxide requires 46×1000/80=575 g sodium.
Thus, 575 g s of sodium would be needed to produce 1.00 kg of sodium hydroxide.
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barium can be analyzed by precipitating it as BaSO4 and determining the mass of the precipitate. When 0.269 g sample of barium compound was treated with excess H2SO4, 0.0891g BaSO4 formed. what percentage of Barium is in the compound?
Answer:
Percentage of Ba in the compound is 19.5%
Explanation:
Based on the data what can be inferred about the biotic factors of this religion
Answer:
I would say the answer is D
Explanation:
write the balance equation of ammonium sulfide + aluminum chloride
Answer:
3(NH4)2S + 2AlCl3 → 6NH4Cl + Al2S3
Explanation:
Firstly, ammonium sulfide has a chemical formula of (NH4)2S while aluminum chloride has a chemical formula of AlCl3. These two chemical substances react as follows:
(NH4)2S + AlCl3 → NH4Cl + Al2S3
This chemical equation is however, unbalanced. To balance the chemical equation, one has to ensure that the atoms of each element on both the reactant and product side equates with one another.
If we carefully observe each atom on both the reactants and product side, we will have the following balanced equation:
3(NH4)2S + 2AlCl3 → 6NH4Cl + Al2S3
That is;
- 6 moles of N and Cl on both sides
- 24 moles of H on both sides
- 3 moles of S on both sides
- 2 moles of Al on both sides
Whats is tge electron configuration of Ag2+ please answer asap..
Answer:
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10
Explanation:
To write the configuration for the Silver and the Silver ion, first we need to write the electron configuration for just Silver (Ag). We first need to find the number of electrons for the Ag atom (there are 47 electrons) using the Periodic Table. When we write the configuration, we'll put all 47
Either way, the Silver electron configuration will be 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s1
Note that when writing the electron configuration for an atom like Ag and Ag+, the 4d is usually written before the 5s. Both of the configurations have the correct numbers of electrons in each orbital, it is just a matter of how the electronic configuration notation is written (see below for an explanation why).
For the Ag+, called the Silver ion, we remove one electron from 5s2 leaving us with:
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10
What is the density of tellerium tribromide at 743.5 torr and 23.2 °C
Answer: The density of tellerium tribromide is 14.8 g/L
Explanation:
The relation between density and Molar mass:
[tex]d=\frac{PM}{RT}[/tex]
P = pressure of gas = 743.5 torr = 0.98 atm (760torr=1atm)
M = Molar mass = 367 g/mol
R = gas constant =[tex]0.0821Latm/Kmol[/tex]
T = temperature =[tex]23.2^0C=(23.2+273)K=296.2K[/tex]
[tex]n=\frac{PV}{RT}[/tex]
[tex]d=\frac{0.98atm\times 367g/mol}{0.0820 L atm/K mol\times 296.2K}=14.8g/L[/tex]
The density of tellerium tribromide is 14.8 g/L
A B C D ............
Answer:
I think gamma, I'm not sure tho
pls help what’s the answer?
An organism's _______ describes its genetic composition. An organism's _______ describes its appearance or observable characteristics.
a) phenotype; genotype
b)heredity; species
c)species; heredity
d) genotype; phenotype
A solution has a volume if 259 mL and contains 0.70 mol MaCl. What is its molarity
Answer:
2.8 m
Explanation:
:)
As the water molecules re-freeze, what happens to the salt ions that are mixed in with the water?
Answer:
Explanation:
Since salt is composed of two ions Na+ and Cl- it will attract to the opposite poles of the water and form a ion-dipole bond. This will cause the phenomenon freezing point depression where as the name states it will take a lower tempertature to freeze it. So instead of freezing at 0 degrees c it will freeze at a negative 2 or so on.
The salt ions end up slowing the growth of ice as the water molecules re-freeze.
What is Depression at the freezing point?Freezing point depression can be defined as the decreasing of the freezing point of pure solvents upon the addition of different kinds of solutes.
Depression in the freezing point can be defined as a colligative property that is proportional to the molality of the solution.
As liquid water gets colder and colder, the motions of water molecules become slower and slower. When salt is added to water, the saltwater solution is composed of both water molecules and dissolved salt ions.
As a result, salt ions can easily replace some of the water molecules. Saltwater freezes more slowly than pure water due to many of the water molecules would be "crashing" into the ice's surface in pure water and are replaced by salt ions.
Therefore, the salt water will freeze at a lower temperature than the pure water.
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What is the formula unit for a compound made from Li and Cl? (5 points)
LiCl because the total negative charge on Cl is one.
LiCl because the total negative charge on Li is two.
Li2Cl because the total positive charge on Cl is one.
Li2Cl because the total positive charge on Li is two.
Answer:
LiCl because the total negative charge on Cl is one.
Explanation:
Lithium has a charge of 1+ and Chlorine has a charge of 1-.
There are two types of chemical compound one is covalent compound and other is ionic compound. LiCl because the total negative charge on Cl is one. The correct option is option A.
What is chemical Compound?
Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
Covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Ionic compounds are hard, these have higher melting and boiling point than the covalent compounds. Li act as cation Li⁺ and Cl act as Cl⁻. These two combine to form LiCl. LiCl is an ionic compound.
Therefore, LiCl because the total negative charge on Cl is one. The correct option is option A.
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5.
Primary succession occurs when pioneer species move into an area that has no plants. Which organisms are common pioneer species?
A Conifer trees and tall grasses with roots that loosen the soil
B. O Mosses and lichens that can grow on rocky surfaces
c. Grasses and weeds that arrive as seeds carried by the wind and then germinate in rich soil
D. O Vines and shrubs that help prevent the erosion of shallow soil
No
Answer:
C
Explanation:
Primary succession occurs when pioneer species move into an area that has no plants. This happens because of Mosses and lichens that can grow on rocky surfaces and the correct option is option B.
What is Primary Succession?Primary succession refers to the establishment of a community in an uninhabited area such as rocks.
It is a type of ecological succession (the evolution of a biological community’s ecological structure) in which plants and animals first colonize a barren, lifeless habitat.
Species that arrive first in the newly created environment are called pioneer species, and through their interactions they build a simple initial biological community.
Therefore, Primary succession occurs when pioneer species move into an area that has no plants. This happens because of Mosses and lichens that can grow on rocky surfaces and the correct option is option B.
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