Answer:
Higher the salinity, more is the density.
Explanation:
The oceanic water is a large storehouse of heat and salinity. The salinity is higher at someplace while it's lower at some places is due to the presence of freshwater and cool water that is less dense. Areas of higher salinity are due to the high evaporation, less precipitation, and influx of rivers. The warm water floats at the top while the cold and cool water at the bottom.12. Convert 1.98 grams of PbSo, to molecules.
No links please
Answer:
3.93 × 10²¹ molecules
Explanation:
Convert 1.98 grams of PbSO₄ to molecules.
Step 1: Given data
Mass of PbSO₄: 1.98 g
Step 2: Calculate the number of moles corresponding to 1.98 g of PbSO₄
The molar mass of PbSO₄ is 303.26 g/mol.
1.98 g × 1 mol/303.26 g = 6.53 × 10⁻³ mol
Step 3: Calculate the number of molecules in 6.53 × 10⁻³ moles of PbSO₄
To convert moles to molecules, we need a conversion factor: Avogadro's number. There are 6.02 × 10²³ molecules of PbSO₄ in 1 mole of molecules of PbSO₄.
6.53 × 10⁻³ mol × 6.02 × 10²³ molecules/1 mol = 3.93 × 10²¹ molecules
8. What is the volume of 5.6 moles of carbon dioxide gas at STP?
Answer:
125.5 ×10^-3 m^3= 0.1255 m^3
Explanation:
Volume=5.6mol×22.414dm^3
=125.5dm^3
Name the guy thats Speedrunning yt right now
Answer:
Lyric
Explanation:
My best guess
Determina cuantos moles hay en 2.31g de NaCl
Answer:
0.0395 mol NaCl
Explanation:
¡Hola!
En este caso, es necesario para nosotros considerar que las relaciones masa-mol se desarrollan teniendo en cuenta las masas molares de los compuestos involucrados en el sistema. Ahora, dado que este sistema se compone de NaCl, cloruro de sodio como sal de mesa, es posible saber que la masa molar de este es alrededor de 58.44 g/mol.
De esta manera, las moles en 2.31 g se calculan como sigue:
[tex]=2.31gNaCl*\frac{1molNaCl}{58.44gNaCl}\\\\=0.0395molNaCl[/tex]
¡Saludos!
Yo wassup with these links every time I ask a question there’s a link everywhere it’s making me mad this needs to stop
convert 32 degrees celsius to kelvin
Answer:
305.15
Explanation:
32 celsius converted to kelvin is 305.15 kelvin
Formula
32°C + 273.15 = 305.15K
g Alkenes and alkynes are called unsaturated compounds because ________. they have fewer hydrogen atoms attached to the carbon chain than alkanes they have fewer carbon atoms than alkanes they have the maximum number of hydrogen atoms attached to each carbon in the compound they have more carbon atoms than alkanes they have more hydrogen atoms attached to the carbon chain than alkanes
Answer:
They have fewer hydrogen atoms attached to the carbon chain than alkanes
Explanation:
Let's compare ethane (an alkane) with ethene (an alkene) and ethyne (an alkyne):
Ethane's formula is C₂H₄, while ethene's is C₂H₄ and ethyne's C₂H₂.As you can see, alkenes and alkynes have fewer hydrogen atoms attached to the carbon chain due to them having multiple bonds between the carbon atoms.
How many moles of gas are in a 25 L container if the temperature is 289 K and the pressure is 125 atm?
Answer:
1.3 moles
Explanation:
pv = nrt
n = pv/rt
n = (125 * 25) / (8.3144598 * 289)
n = 1.3 moles
Is cardboard a solid
Answer:
yes because it has a fixed shape and volume
hope this helps
have a good day :)
Explanation:
7. Assume that you have collected 867 L of nitrogen gas at STP. What is the mass of the nitrogen gas?
Answer:
1083.6 g
Explanation:
At STP, 1 mol of any given mass will occupy 22.4 L.
With the information above in mind we can calculate how many moles of nitrogen gas (N₂) are there in 867 L:
867 L ÷ 22.4 L/mol = 38.7 molFinally we convert 38.7 moles of N₂ into grams, using its molar mass:
38.7 mol * 28 g/mol = 1083.6 gAcetylene, C2H2 (also known as ethyne), is commonly used as a fuel for welding torches.
a. True
b. False
Answer:
True
Explanation:
Acetylene or Ethyne is the simples form of hydrocarbon with triple bond in it. It is the first member of alkyne series. It colorless, highly inflammable gas. This is why is used in oxy-acetylene torches used for welding and cutting materials. It is also used as raw material in synthesis of many organic chemicals and plastics.
So, the given statement is true.
Plzzzzzzzzzzzzzzzz help
Answer:
Your correct.
Explanation:
Answer:
The answer is C.
Explanation:
I just know.
30 points ASAP Which are limiting nutrients for plant growth?
water and nitrogen
nitrogen and carbon
carbon and phosphorus
phosphorus and nitrogen
I think its phosphorus and nitrogen
I don’t know how to do this, LIKE IT WAS NOT EVEN IN THE VIDEO :/
The formation of soap can be done with the process of saponification in which triglyceraldehyde reacts with 3 molecules of Sodium Hydroxide (NaOH) and produces Glycerol and 3 molecules of Sodium palmitate (Soap).
(Reaction is attached as image)
What is Saponification ?Saponification is a process that involves the conversion of fat, oil, or lipid, into soap and alcohol by the action of aqueous alkali.
Soaps are salts of fatty acids, which in turn are carboxylic acids with long carbon chains.
Hence, The formation of soap can be done with the process of saponification in which triglyceraldehyde reacts with 3 molecules of Sodium Hydroxide (NaOH) and produces Glycerol and 3 molecules of Sodium palmitate (Soap).
Learn more about Saponification here ;
https://brainly.com/question/2263502
#SPJ1
The student then sets up two more test tubes containing iron nails.
Explain why
test tube 1 does not rust because boiled water has no oxygen and oil stops new oxygen from entering and without oxygen iron cannot rust.
test tube 2 does not rust because the drying agent absorbs all the moisture from air, and moisture is required for iron to rust.
In the absence of oxygen or moisture rusting of the nail can not take place.
There are two very important things that must be present for the process of rusting to take place these are;
Oxygen MoistureIf we can exclude these two, rusting will not take place in the absence of either of them.
Rusting does not occur in tube 1 because the water have been boiled and the oxygen removed then it is stored under oil that prevents corrosion.
In tube 2, there is a drying agent that removes moisture from air hence moisture does not have access to the nail so it does not rust.
Learn more about rusting: https://brainly.com/question/4206267
answer this correctly, only sincere answers please. I really need help. I will do all I can to make someone answer this. Thanks! ASAP
Explain the relationship between pH, POH, hydronium concentration and hydroxide concentration and be prepared to complete the chart below based on the provided knowns.
Complete the chart below based on the provided knowns.
H+ ______x_______
OH - 1 x 10^-11______
pH 3_____________
POH _____y_______
Answer:
See Explanation
Explanation:
Let us recall that;
[H^+] [OH^-] = 1 * 10^-14
Where;
[OH^-] = 1 x 10^-11
Then;
[H^+] = 1 * 10^-14/1 x 10^-11
[H^+] = 1 * 10^-3
pH = -log [H^+]
pH = -log(1 * 10^-3)
pH = 3
Also;
pH + pOH = 14
pOH = 14 - pH
pOH = 14 -3
pOH = 11
TRUE OR FALSE?
The reason for forming multiple bonds is an interaction of end to end type between unhybridized p orbitals.
20 points!
Answer:
I think its false
Explanation:
calculate the wavelength of yellow light with the energy of 3.45x10-19 J
Answer: The wavelength of yellow light with the energy of [tex]3.45 \times 10^{-19} J[/tex] is [tex]5.76 \times 10^{-7} m[/tex].
Explanation:
Given: Energy = [tex]3.45 \times 10^{-19} J[/tex]
Formula used to calculate the wavelength is as follows.
[tex]E = \frac{hc}{\lambda}[/tex]
where,
E = energy
h = Planck's constant = [tex]6.63 \times 10^{-34} Js[/tex]
c = speed of light = [tex]3 \times 10^{8} m/s[/tex]
[tex]\lambda[/tex] = wavelength
Substitute the values into above formula as follows.
[tex]E = \frac{hc}{\lambda}\\3.45 \times 10^{-19} J = \frac{6.63 \times 10^{-34} Js \times 3 \times 10^{8} m/s}{\lambda}\\\lambda = 5.76 \times 10^{-7} m[/tex]
Thus, we can conclude that the wavelength of yellow light with the energy of [tex]3.45 \times 10^{-19} J[/tex] is [tex]5.76 \times 10^{-7} m[/tex].
Define "mole in chemistry terms
Answer:
Can you please post a pictah.
Explanation:
Answer: A mole is defined as 6.02214076 × 1023 of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.
What is the definition of specific heat?
A. The heat needed to raise the temperature of 1 g of a substance
1°C
B. The total amount of energy contained within 1 mole of a
substance
C. The heat required to break the molecular bonds within a
substance
D. The temperature change between the melting and boiling points of
a substance
Answer:
A. The heat needed to raise the temperature of 1 g of a substance 1°C.
Explanation:
how this has helped you
Please hurry!!! And help!!
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Best answer gets marked Brainliest!
The table below shows several minerals found in earths crust based on the information in the table which mineral is also an element
A) Calcite
B) quartz
C) hematite
D) graphite
Answer:
Graphite, because it has atoms of same atomic and electrovalent electrons
In the covalent compound CH3, the Greek prefix used to represent the anion is Answer here
Answer:
Tri.
Explanation:
''Tri'' is the Greek prefix used to represent the CH3 because there are three hydrogen atoms to form the covalent compound so in Greek method ''Tri'' is used for three. In Greek system, there are certain names for prefixes such as ''di'' is used for two, ''tri'' is used for three, ''tetra'' is used for four etc. This method only provides information about the number of atoms that form the covalent compound.
Which reaction type is the following: AgF + CaCl2 --> AgCl + CaF2
Explanation:
[tex]{\small{\underline{\bf{\red{answer...}}}}} \\ \\ [/tex]
[tex]\small\mathfrak\purple{Double \: displacement \: reaction} \\ \\ \small\mathfrak\orange{hope \: it \: helps...}[/tex]
elect the best choice, and briefly indicate the reason for your choice: a. Lowest ionization energy: K Rb Cs b. Most favorable electron affinity: Cl Br I c. Most energy required to remove an electron: Cu Cu Cu2
Answer:
Lowest ionization energy: Cs
Most favorable electron affinity: Cl
Most energy required to remove an electron: Cu2+
Explanation:
Ionization energy decreases down the group. That means that as we move down the group, the ionization energy of elements decreases due to greater distance of the outermost electron from the nucleus and greater screening effect of inner electrons on this outermost electron. Hence Cs has the lowest ionization energy.
Electron affinity of halogens decreases down the group. Hence, Cl possess the most favorable electron affinity.
When an electron has been removed from an atom, the removal of the next electron is usually harder. Thus, the second ionization energy is always greater than the first ionization energy and so on. Thus, it is most difficult to remove an electron from Cu^2+ from which two electrons have already been removed.
How many grams of NiNi are formed from 55.3 g55.3 g of Ni2O3Ni2O3?
2Ni2O3(s)⟶4Ni(s)+3O2(g)2Ni2O3(s)⟶4Ni(s)+3O2(g)
Step 1: Show the strategy for solving this problem.
You are currently in a labeling module. Turn off browse mode or quick nav, Tab to items, Space or Enter to pick up, Tab to move, Space or Enter to drop.
grams Ni2O3⟶⟶⟶grams Nigrams Ni2O3⟶⟶⟶grams Ni
Answer Bank
grams O2O2
moles NiNi
grams NiNi
moles Ni2O3Ni2O3
moles O2O2
grams Ni2O3Ni2O3
Answer:
110.92 g
Explanation:
Amount of Ni2O3 consumed= 55.3/59 =0.94 moles
From the reaction equation;
2 moles of Ni2O3 yields 4 moles of Ni
0.94 moles yields 0.94 moles * 4/2
= 1.88 moles of Ni2O3
Mass of 1.88 moles of Ni2O3 = 1.88 moles of Ni2O3 * 59 gmol-1 = 110.92 g
what is the difference between diffusion and osmoses
Answer:
Diffusion means that particles travel from a higher concentration to a lower concentration region before balance is achieved. The semi-permeable membrane is present in osmosis, so that only solvent molecules can travel freely to equalize the levels.
Why do different parts of the world have such different animals?
Answer:
a
Explanation:
A chemist has a small amount of compound that has the boiling point 65°c that must be fractionally distilled. Yet, the chemist doesn't want to lose any of the compound to hold up on the column. What the chemist should do?
Answer:
A "chaser," a high-boiling compound whose vapors will displace the vapors of the desired low-boiling compound, can be used to distill a small amount of compound.
A smaller fractionation apparatus or a Vigreux column could be used instead.
Explanation:
Given the following information: SO2(g) + 12 O2(g) = SO3(g) Kp = 2.5E-2 What is the Kp value for the following reaction: 2 SO2(g) + O2(g) = 2 SO3(g)
Answer:
K = 6.25x10⁻⁴
Explanation:
Based on the reaction:
SO₂ + 1/2 O₂ ⇄ SO₃ Kp = 2.5x10⁻²
We can find the Kp of a similar reaction using Hess's law where the sum of 2 reactions a and b produce a K that is:
K = Ka*Kb
The sum of twice the reaction of the problem:
SO₂ + 1/2 O₂ ⇄ SO₃
+ SO₂ + 1/2 O₂ ⇄ SO₃
2SO₂ + O₂ ⇄ 2SO₃
Where K must be:
K = Kp*Kp = Kp²
K = (2.5x10⁻²)²
K = 6.25x10⁻⁴Write the balanced half equation of iron 2 and permanganate in a solution of acid. Show all of your work.
Answer:
5Fe⁺² + MnO₄⁻ + 8H⁺ => 5Fe⁺³ + Mn⁺² + 4H₂O
Explanation:
Fe⁺² + MnO₄⁻ + H⁺ => Mn⁺² + Fe⁺³ + H₂O
5(Fe⁺² => Fe⁺³ + 1e⁻) => 5Fe⁺² => 5Fe⁺³ + 5e⁻
MnO₄⁻ + 5e⁻ => Mn⁺² => MnO₄⁻ + 8H⁺ + 5e⁻ => Mn⁺² + 4H₂O
=> 5Fe⁺² + MnO₄⁻ + 8H⁺ => 5Fe⁺³ + Mn⁺² + 4H₂O