The amount of millimoles of solid naoh that must be added to 50.0 milliliters is: 5.0 mmol of NaOH.
Millimoles of solid naohThe [H+] at pH 7.49 is:
[H+] = 10–^7.49
[H+]= 3.24×10–^8 M
And when the solution is half-neutralized pH will be:
pH = pKa while [OCl– ]÷[HOCl] = 1
Now let find the millimoles of solid naoh:
0.20 mol HOCl÷1 L× 50.0 mL
= 10.0 mmol HOCl
Half of 10.0 mmol HOCl will be added
Millimoles of solid naoh=10.0 mmol HOCl÷2
Millimoles of solid naoh= 5.0 mmol of NaOH
Inconclusion the amount of millimoles of solid naoh that must be added to 50.0 milliliters is: 5.0 mmol of NaOH.
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How is temperature related to the physical change of a
substance?
Answer:
Physical conditions like temperature and pressure affect state of matter. ... When thermal energy is added to a substance, its temperature increases, which can change its state from solid to liquid (melting), liquid to gas (vaporization), or solid to gas (sublimation)
Answer:
Temperature is a measure of the kinetic energy of particles in a substance. As temperature increases, the atoms or molecules in a substance gain energy. As temperature decreases, the particles lose energy. A change in the energy of particles causes a change in their arrangement. A change in the arrangement of particles can lead to a physical change.
Explanation:
on edge 2021
I need help pls help me I’m stuck
Answer:
True
Explanation:
All living things are made from many cells
Answer:
[tex]\huge\boxed{True}[/tex]
Explanation:
All living things are composed of cells which are the basic building blocks of living things.
Cell => Tissue => Organ => Organ System => Organism
So, Cell is the "basic" unit of living organism without which living things cannot be mage or cannot function.
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AnonymousHelper1807What is the defenition of protons?
Answer:
It's basically a positive charged atom.
Explanation:
Fe + Cl2 → FeCl3, what coefficients would balance the equation?
3,2,2
1,1,1
2,3,2
4,2,2
The coefficients that will balance the equation will be 2,3,2.
Balancing chemical equationFor a balanced equation, the number of atoms of each element on the reactant side must be equal to those of the product side.
Thus, the balanced equation of the reaction will be:
2Fe + 3Cl2 → 2FeCl3
Consequently, the coefficients of the balanced equation are 2,3,2.
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compressed springs and stretch rubber bands store ______ energy
Answer:
elastic potential energy
Explanation:
Elastic potential energy is the energy stored in elastic materials as the result of their stretching or compressing.
Does anyone know this answer ?
Answer:
sorry I can't able to help you
Explanation:
[tex]hii[/tex]
have a nice day ✌️✌️
The chemical equation below shows the reaction between carbon dioxide (CO2) and lithium hydroxide (LiOH). CO2 2LiOH Right arrow. Li2CO3 H2O The molar mass CO2 is 44. 01 g/mol. How many moles of LiOH are needed to react completely with 25. 5 g of CO2? 0. 290 moles 0. 579 moles 1. 16 moles 1. 73 moles.
Answer:
C
Explanation:
The reaction between carbon dioxide and lithium hydroxide can be represented by the equation:
[tex]\displaystyle \text{CO$_2$} + 2\text{LiOH} \longrightarrow \text{Li$_2$CO$_3$}+ \text{H$_2$O}[/tex]
We want to determine the amount of moles of LiOH needed to react completely with 25.5 g of CO₂.
Determine the number of moles of CO₂ in 25.5 g of CO₂:
[tex]\displaystyle 25.5\text{ g CO$_2$} \cdot \frac{1\text{ mol CO$_2$}}{44.01\text{ g CO$_2$}} = 0.579\text{ mol CO$_2$}[/tex]
Use stoichiometry to determine the amount of LiOH necessary. CO₂ and LiOH are in a 1:2 ratio. That is, for every one mole of CO₂ that reacts, two moles of LiOH must also react.
[tex]\displaystyle 0.579\text{ mol CO$_2$} \cdot \frac{2\text{ mol LiOH}}{1\text{ mol CO$_2$}} = 1.16\text{ mol LiOH}[/tex]
In conclusion, our answer is C.
Please help me with this chemistry work !!!!!
Answer:
1. Mn
2. Se
3. Al
4. Na
5. Ca
6. IE
7. Mg
8. Sb
9. Sn
10. H
Explanation:
1.
Which weather pattern can drop torrential amounts of rain, create storm surges, and destroy structures with high winds?
drought
tornado
hurricane
thunderstorm
2.
What is the main energy source for a hurricane?
winds blowing from high pressure to low pressure
warm air masses
cool ocean water
warm ocean water
3.
What makes the weather inside the eye of the storm calm and clear?
high pressure air
low pressure air
clockwise rotation
counterclockwise rotation
I will mark brainliest.
*These three questions are strictly for study.
1) Hurricane
A hurricane can cause destruction at a high scale2) winds blowing from high pressure to low pressure
when the clouds take up the hot vapours , making the atmosphere warm ,the pressure increases resulting in formation of wind and when these winds wind up to make a huge pattern which we call hurricane3) Clock wise rotation
The clockwise rotation moving a same direction helps to make the eye visible to uscan you balance 12 blocks on the 3x2 platform
(25 POINTS) How does sediment size around a river affect erosion?
Answer: It can affect the shape of sediment because it is scraping very slowly against it causing it to change,
Explanation:
Which statement describes a difference between transcription in eukaryotic and prokaryotic cells?
In eukaryotes, transcription occurs simultaneously with translation, while transcription in prokaryotes must complete before translation can begin..
In eukaryotes, transcription produces a monocistronic RNA, while transcription in prokaryotes produces a polycistronic RNA.
In eukaryotes, transcription produces an RNA molecule, while transcription in prokaryotes produces a DNA molecule.
In eukaryotes, transcription produces an DNA molecule, while transcription in prokaryotes produces a RNA molecule.
In eukaryotes, transcription is completed by an RNA polymerase, while transcription in prokaryotes is completed with a DNA polymerase.
Answer:
Which statement describes a difference between transcription in eukaryotic and prokaryotic cells?
In eukaryotes, transcription occurs simultaneously with translation, while transcription in prokaryotes must complete before translation can begin..
In eukaryotes, transcription produces a monocistronic RNA, while transcription in prokaryotes produces a polycistronic RNA.
In eukaryotes, transcription produces an RNA molecule, while transcription in prokaryotes produces a DNA molecule.
In eukaryotes, transcription produces an DNA molecule, while transcription in prokaryotes produces a RNA molecule.
In eukaryotes, transcription is completed by an RNA polymerase, while transcription in prokaryotes is completed with a DNA polymerase.
What happens to temperature as a substance melts and heat energy is used to break the connections between molecules, until all melting is complete?.
What happens to temperature as a substance melts and heat energy is used to break the connections between molecules, until all melting is complete?.
Answer : Stays the same
How much heat is produced by the combustion of 125 g of acetylene (C2H2)?
C2H2(g) +
202(8)
2C02(8) + H2O(1)
AH = -1301.1 kJ/mol
The amount of heat produced when 125 g of acetylene C₂H₂ combust in air is –6255.3 KJ
Balanced equationC₂H₂ + 5/2O₂ —> 2CO₂ + H₂O ΔH = –1301.1 KJ/mol
From the balanced equation above,
1 mole of C₂H₂ releases –1301.1 KJ of heat energy
But
1 mole of C₂H₂ = (2×12) + (1×2) = 26 g
Thus,
26 g of C₂H₂ releases –1301.1 KJ of heat energy
How to determine the heat released by 125 g of C₂H₂From the balanced equation above,
26 g of C₂H₂ releases –1301.1 KJ of heat energy
Therefore,
125 g of C₂H₂ will release = (125 × –1301.1) / 26 = –6255.3 KJ of heat energy
Thus, –6255.3 KJ of heat energy were produced from the reaction.
Learn more enthalpy change:
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hello people ~
What happens when lead nitrate reacts with potassium iodide?
(a) They will not react
(b) Large amount of hydrogen release
(c) Yellow ppt of lead iodide and potassium nitrate will be produced
(d) Evolution of gas will occur
Answer:
Option C
Explanation:
The reaction is given by
[tex]\\ \rm\rightarrowtail {Pb(NO_3)_2\atop Lead\:nitrate}+{KI\atop Potassium\:iodide}\longrightarrow {KNO_3\atop Potassium\:nitrate}+{PbI_2\atop Lead\:Iodide}[/tex]
This is a double Displacement reaction
What is the main difference between Lewis structure and Bohr models?
The main difference between both models is that the Bohr model depicts all subatomic particles, but the Lewis dot diagram only depicts the symbol and valence electrons.
What is Lewis structure?Lewis Structure is a simplified representation of a molecule's valence shell electrons. It's used to depict how electrons in a molecule are distributed around specific atoms.
Electrons are shown as "dots" or as a line between two atoms when they are bonded in Lewis structure.The Bohr Model is a planetary model in which negatively charged electrons orbit a tiny, positively charged nucleus in the same way that planets orbit the sun.Hence the Bohr model depicts all subatomic particles, but the Lewis dot diagram only depicts the symbol and valence electrons.
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#SPJ2
a particular radio station broadcasts radio waves at 100 MHz (100 million Hz). if radio waves travel at the speed of light (300 million m/s), then what is the wavelength of the radio waves that the station broadcasts.
Wavelength = (speed) / (frequency)
= (3 x 10⁸ m/s) / (1 x 10⁸ /s) = 3 meters
hello people ~
Petrochemicals are
A. mixtures of petrol and chemical fertilizer.
B. materials obtained from petroleum refining.
C. mixtures of coal and petrol.
D. mixtures of wood and chemicals
Materials obtained from petroleum refining
Answer:
Petrochemicals are mixtures of petroleum and natural gasThey ae mined undergroundExamples are Petrol,diesel ,etc
I’m marking BRAINLIEST for whoever answers first. and this is science.
Answer:
The right answer is electrons :)
Answer:
Magnetism is caused by the motion of:
Option 3, electrons.
Explanation:
Because every substance is made up of these tiny units called atoms. And each atom has electrons, particles that carry electric charges.
Hope this helps you out!
Solid zinc and aqueous lead (II) nitrate react to from aqueous zinc (II) nitrate and solid lead.
Zn(s) + Pb(NO₃)₂ (aq) → Zn(NO₃)₃ (aq) + Pb (s)
Further explanationThere are two types of chemical reactions that may occur.
single-replacement reactions and double-replacement reactions.
A single replacement reaction is a chemical reaction in which one element replaces the other elements of a compound to produce new elements and compounds
A + BC ⇒ AC + B
Not all of these reactions can occur. We can use the activity series, which is a list of elements that can replace other elements below / to the right of them in a single replacement reaction.
This series is better known as the Volta series, where the metal element with a more negative electrode potential is on the left, while the element with a more positive electrode potential on the right.
The more left the position of a metal in the series, the more reactive metal (easy to release electrons)
Generally, the Volta series used is
Li K Ba Sr Ca Na Mg Al Mn Zn Cr Fe Cd Co Ni Sn Pb H Sb Bi Cu Hg Ag Pt Au
Solid zinc and aqueous lead (II) nitrate react to from aqueous zinc (II) nitrate and solid lead.
Can be expressed in chemical equations :
Zinc + aqueous lead (II) nitrate ⇒aqueous zinc nitrate + lead metal
Zn(s) + Pb(NO₃)₂ (aq) → Zn(NO₃)₃ (aq) + Pb (s)
Reactants : Zn and Pb(NO₃)₂
Products : Zn(NO₃)₃ and Pb
The existing Zinc element can replace the Lead element, which is on the right side of Zn, so the reaction will occur.
a mass of 0.15 ounces is equal to how many grams if 1 oz = 28.35 grams?
Answer:4 1/2 grams.
Explanation: 0.15 is equal to 4 1/2 grams because if you convert ounces into grams 0.15 is equal to 28.35. hope this helped bro.
is thermal decomposition a redox reaction?
Answer:
yes.
Explanation:
the definition of a redox reaction is a chemical reaction in which electrons are transferred between two reactants participating in it, meaning, thermal decomposition is a chemical reaction where a substance is being broken down hence, electrons being transfered.
BER:
Which of the following predictions about global climate change is directly related to an increase in the burning of fossil
fuels?
a. increased extreme weather
b. decreased food supply
c. global warming
d. falling sea levels
oo
What is a single celled organism able to do?
differentiate
grow to large sizes
make tissues
survive on its own
Answer:
he or she is right
make tissues is the answer
Explanation:
hope this helps :)
What's the correct IUPAC name of the structure shown?
A. Methylhexene
B. 4-methylhex-1-ene
C. Hex-1-ene
D. 3-methylhex-5-ene
Answer:
B. 4-methylhex-1-ene
Explanation:
There are 6 carbons for the main molecule of 1-hexene. They are counted from the first (1) on the terminal C with the double bond (ene). A methyl group is hanging on carbon number 4, so it is the 4-methyl.
4-methylhex-1-ene.
What would happen if sodium and potassium are placed in hot water?
A sample of sodium hydroxide (naoh) has a mass of 160.0 g. the molar mass of naoh is 40.00 g/mol. how many moles of naoh does this sample contain? 4.000 moles 40.00 moles 160.0 moles 6,400 moles
The number of moles the sample of sodium hydroxide (NaOH) will contain is 4 moles.
How we calculate moles?Moles of any substance will be calculated by using the below formula:
n = W/M, where
W = given mass
M = molar mass
Given mass of NaOH = 160 g
Given molar mass of NaOH = 40 g/mole
On putting these values on the above equation, we get
n = 160 / 40 = 4 moles
Hence, required moles is 4 moles.
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Answer:
A). 4.000
Explanation:
Poopy fart fart
17. True or False: Proximal means farther away from the point of attachment of the limb. *
(1 Point)
True
False
How is the burning candle similar to a living organism?
Answer:
it responds to fire because the fire is something called the stimulus which forces the wax on the candle to melt.
An isotope has a half-life of 2 days. How much will be left after 6 days?
O 1/6
O 1/2
O 1/8
O 1/4