Answers
Pentanal (C4H9CHO) is the answer
Related Questions
Are real or ideal gases used in labs?
Answers
Consider the titration of 40.0 mL of 0.200 M HClO4 by 0.100 M KOH. Calculate the pH of the resulting solution after the following volumes of KOH have been added.
a. 0.0 mL
b. 80.0 mL
c. 10.0 mL
d. 100.0 mL
e. 40.0 mL
Answers
Answer:
a) 0.70
b) 7.00
c) 0.85
d) 12.15
e) 1.30
Explanation:
The neutralization reaction involved in the titration is:
HClO₄(aq) + KOH(aq) → KClO₄(aq) + H₂O(l)
According to the chemical equation, 1 mol of HClO₄ reacts with 1 mol of KOH (1 equivalent of acid with 1 equivalent of base). The moles are calculated from the product of the molar concentration (M) and the volume in liters.
We have the following moles of acid (HClO₄):
40.0 mL x 1 L/1000 mL = 0.04 L
0.200 mol/L x 0.04 L = 8 x 10⁻³ moles HClO₄
Since HClO₄ is a strong acid (completely dissociated into H⁺ and ClO₄⁻ ions), the moles of HClO₄ are equal to the moles of H⁺. Then, we can calculate the initial pH:
[H⁺] = 0.200 M → pH = -log [H⁺] = -log (0.200) = 0.70
Now, we calculate the pH after the addition of KOH. Since KOH is a strong base, the concentration of KOH is equal to the concentration of OH⁻ ions.
a) 0.0 mL
No KOH is added, so the pH is the initial pH: 0.70
b) 80.0 mL KOH
80.0 mL x 1 L/1000 mL = 0.08 L
0.100 mol/L x 0.08 L = 8 x 10⁻³ moles KOH = 8 x 10⁻³ moles OH⁻
After neutralization we have:
8 x 10⁻³ moles H⁺ - 8 x 10⁻³ moles OH⁻ = 0
The neutralization reaction is complete and there is no remaining H⁺ from the acid. The concentration of H⁺ is equal to the concentration of H⁺ of water:
[H⁺] = 1 x 10⁻⁷ M → pH = -log [H⁺] = -log (1 x 10⁻⁷) = 7.0
c) 10.0 mL KOH
10.0 mL x 1 L/1000 mL = 0.01 L
0.100 mol/L x 0.01 L = 1 x 10⁻³ moles KOH = 1 x 10⁻³ moles OH⁻
After neutralization we have:
8 x 10⁻³ moles H⁺ - 1 x 10⁻³ moles OH⁻ = 7 x 10⁻³ moles H⁺
The total volume is: V = 40.0 mL + 10.0 mL = 50 mL = 0.05 L
[H⁺] = 7 x 10⁻³ moles/0.05 L = 0.14 → pH = -log [H⁺] = -log (0.14) = 0.85
d) 100.0 mL KOH
100.0 mL x 1 L/1000 mL = 0.1 L
0.100 mol/L x 0.1 L = 0.01 moles KOH = 1 x 10⁻² moles OH⁻
After neutralization we have:
1 x 10⁻² moles OH⁻ - 8 x 10⁻³ moles H⁺ = 2 x 10⁻³ moles OH⁻
The total volume is: V = 40.0 mL + 100.0 mL = 140 mL = 0.14 L
[OH⁻] = 2 x 10⁻³ moles/0.14 L = 0.014 → pOH = -log [OH⁻] = -log (0.014) = 1.84
pH + pOH = 14 → pH = 14 - pOH = 14 - 1.84 = 12.15
e) 40.0 mL KOH
40.0 mL x 1 L/1000 mL = 0.04 L
0.100 mol/L x 0.04 L = 4 x 10⁻³ moles KOH = 4 x 10⁻³ moles OH⁻
After neutralization we have:
8 x 10⁻³ moles H⁺ - 4 x 10⁻³ moles OH⁻ = 4 x 10⁻³ moles H⁺
The total volume is: V = 40.0 mL + 40.0 mL = 80.0 mL = 0.08 L
[OH⁻] = 4 x 10⁻³ moles/0.08 L = 0.05 M → pH = -log [H⁺] = -log (0.05) = 1.30
which of the following is not a mixture
A. air
B. blood
C. orange juice
D. salt
Answers
When you rub your palms together,
static friction occurs.
sliding friction occurs.
rolling friction occurs.
fluid friction occurs.
Answers
Answer:
sliding friction occurs
Answer:
Sliding friction is occurs
Now run this simulation that demonstrates the properties of gases. The simulation shows a container with a lid on top. The lid can be opened and closed by dragging it left and right. On the left side of the container is a yellow handle. Drag this handle right or left to decrease or increase the volume of the container. On the top right of the container are a thermometer and a pressure gauge. Follow these steps to use the simulation, and then answer the question that follows. 1. Reduce the container to its least volume by dragging the yellow handle as far right as you can. 2. In the Gas in Chamber menu, add 80 molecules of heavy species to the container. 3. In the Constant Parameter menu, select Pressure. 4. Increase the number of heavy species molecules to 200. What do you observe when the molecules are increased from 80 to 200 at constant pressure?
link http://contentstore.ple.platoweb.com/content/sharedmedia/phet_sims_batch2/gas-properties/gas-properties_en.html
Answers
Answer:
The pressure will increase linearly if you increase the moles/molecules of gas
Explanation:
The information shows the masses after the compounds are balanced.
2MgO + 2Cl2 → 2MgCl2 + ?
80g + 140g + 1889 + ?
If the following materials are used during the reaction of magnesium,
oxygen, and chlorine, what mass oxygen would we expect to see after
the reaction and why?
O A. 40g of Oz, because all mass must be conserved, it would be half of the
compound Mgo in the products
O B. 32g of Oz, because all mass must be conserved
c. 32g of Oz, because all mass must be conserved, it would be half of the
compound Mgo in the products
D. 40g of Oz, because all mass must be conserved
Answers
32g mass of oxygen would we expect to see after the reaction, because all mass must be conserved.
How we calculate the mass of any substance from moles?
Mass of any substance can be calculated from moles as:
n = W/M, where
n = moles
W = given weight or mass
M = molar mass
Given balanced complete chemical reaction is:
2MgO + 2Cl₂ → 2MgCl₂ + O₂
From the stoichiometry of the reaction it is clear that 2 moles of MgO & Cl₂ is required for the formation of 2 moles of MgCl₂ & 1 mole of O₂. Also the masses of the compound is also given for the balanced reaction as:
Mass of MgO for 2 mole = 80g
Mass of Cl₂ for 2 mole = 140g
Mass of MgCl₂ for 2 mole = 188g
So, it is clear that given masses will show conservation for their standard 1 mole of masses as mass of MgO, Cl₂ & MgCl₂ for 1 mole is 40.3g/mol, 70.90g/mol & 95.2g/mol respectively.
Hence, we conclude that mass for 1 mole of O₂ should be 32g.
Therefore, option (B) is correct i.e. 32g of O₂, because all mass must be conserved.
To know more about mole to mass conversion, visit the below link:
https://brainly.com/question/13314627
Which statement best describes the temperature of the ocean's surface water?
Answers
with the exception of water, matter ____ when heated
A. solidifies
B. contracts
C. expands
D. condenses
Answers
Answer:
CCCCCCCCC
Explanation:
6. How have dolphins adapted to undenvater lite
HELP!!!
Answers
Answer:
Dolphins have streamlined body shapes that are very hydrodynamic, allowing them to swim fast. Additionally, dolphins have very tight skin and adults have no body hair, both of which help to reduce drag on the marine mammals as they move through the water. Incidentally, dolphins have mated and gone in pairs, and then got more protection.
The breaking of _____________________ bonds in food releases energy for your body to use.
thermal
electromagnetic
electrical
chemical
Answers
Answer:
Chemical bonds
Explanation:
the chemicals in your food are what give you energy when they break down, that's how it releases energy Into your body.
Please help
Holmia is the latin word for the swedish city Stockholm, Which element is named for this city?
Answers
Answer:
#67 Holmium
Explanation:
holmia + ium = element name
A 3.42 gram sample of an unknown gas is found to occupy a volume of 1.90 L at a pressure of 547 mm Hg and a temperature of 33 °C. The molecular weight of the unknown gas is ___ g/mol.
Answers
Be sure to convert T from Celsius to Kelvin by adding 273.
Also I prefer to deal with pressure in atm rather than mmHg, so divide the pressure by 760 to get it in atm.
PV = nRT —> n = PV/RT
P = 547 mmHg = 547/760 atm = 0.720 atm
V = 1.90 L
T = 33°C = 33 + 273 K = 306 K
R = 0.08206 L atm / mol K
n = (0.720 atm)(1.90 L) / (0.08206 L atm / mol K)(306 K) = 0.0545 mol of gas
Now divide grams by mol to get the molecular weight.
3.42 g / 0.0545 mol = 62.8 g/mol
24. Explain what happens at the particle level when a solid melts.
Answers
Answer:
When a solid is heated the particles gain energy and start to vibrate faster and faster. ... At this point the solid is melting to form a liquid. The particles in the liquid are the same as in the solid but they have more energy.
Explanation:
sana maka help
Write the electron configuration for . (Express your answer as a series of orbitals, in order of increasing orbital energy. For example, the electron configuration of Li would be entered as 1s22s1 or [He]2s1.) Write the electron configuration for . (Express your answer as a series of orbitals, in order of increasing orbital energy. For example, the electron configuration of Li would be entered as 1s22s1 or [He]2s1.) Write the electron configuration for . (Express your answer as a series of orbitals, in order of increasing orbital energy. For example, the electron configuration of Li would be entered as 1s22s1 or [He]2s1.) Write the electron configuration for . (Express your answer as a series of orbitals, in order of increasing orbital energy. For example, the electron configuration of Li would be entered as 1s22s1 or [He]2s1.)
Answers
The given question is incomplete. The complete question is:
Write the electron configuration for [tex]Ca^+[/tex] . (Express your answer as a series of orbitals, in order of increasing orbital energy. For example, the electron configuration of Li would be entered as 1s22s1 or [He]2s1.) Write the electron configuration for [tex]Ca^{2+}[/tex] . (Express your answer as a series of orbitals, in order of increasing orbital energy. For example, the electron configuration of Li would be entered as 1s22s1 or [He]2s1.) Write the electron configuration for [tex]Se^{2-}[/tex] . (Express your answer as a series of orbitals, in order of increasing orbital energy. For example, the electron configuration of Li would be entered as 1s22s1 or [He]2s1.) Write the electron configuration for [tex]S^{2-}[/tex]. (Express your answer as a series of orbitals, in order of increasing orbital energy. For example, the electron configuration of Li would be entered as 1s22s1 or [He]2s1.)
Answer:
[tex]Ca^+:19:[Ar]4s^1[/tex]
[tex]Ca^{2+}:18:[Ar][/tex]
[tex]Se^{2-}:32:[Ar]3d^{10}4s^24p^2[/tex]
[tex]S^{2-}:18:[Ar][/tex]
Explanation:
Electronic configuration represents the total number of electrons that a neutral element contains. We add all the superscripts to know the number of electrons in an atom.
The electrons are filled according to Afbau's rule in order of increasing energies. The positively charged species are formed by loss of electrons and negatively charged species are formed by gain of electrons.
[tex]Ca:20:[Ar]4s^2[/tex]
[tex]Ca^+:19:[Ar]4s^1[/tex]
[tex]Ca^{2+}:18:[Ar][/tex]
[tex]Se:34:[Ar]3d^{10}4s^24p^4[/tex]
[tex]Se^{2-}:36:[Ar]3d^{10}4s^24p^6[/tex] or [tex]Se^{2-}:36:[Kr][/tex]
[tex]S:16:[Ne]3s^23p^4[/tex]
[tex]S^{2-}:18:[Ne]3s^23p^6[/tex] or [tex]S^{2-}:18:[Ar][/tex]
In the water cycle, which process results in cloud formation?
A Evaporation
B
Condensation
C Precipitation
D
Run Off
Answers
How many moles of H20 are needed to produce 1 mole of O2 in the following equation?
2H2O + 2H2 + 102
Answers
Match it, I’m not sure which category they go in
Answers
Answer:
Endothermic is something that needs heat added into it, while exoteric gives heat off
Explanation:
1. Endo(Melting ice)
2. Endo(heat enters the system)
3. Exothermic(making ice)
4. Endothermic( liquid to gas)
5. Exothermic(campfire)
6. exothermic(gas to a liquid)
7. Exothermic (the flame of a candle)
8. Exothermic (heat leaves the system)
9. I don’t know if photosynthesis is exo or endothermic
How does nitrogen-fixing bacteria make nitrogen available to plants and animals?
Answers
Answer:
hi thxs for the points now bye
Answer:
Nitrogen-fixing bacteria in the soil and within the root nodules of some plants convert nitrogen gas in the atmosphere to ammonia. Nitrifying bacteria convert ammonia to nitrites or nitrates. Ammonia, nitrites, and nitrates are all fixed nitrogen and can be absorbed by plants.
Explanation:
Hope It Help
True or False: Air pollution contributes to global warming.
A. True
B. False
Answers
Explanation -
Burning fossil fuels releases gases and chemicals into the air. And in an especially destructive feedback loop, air pollution not only contributes to climate change but is also exacerbated by it. Air pollution in the form of carbon dioxide and methane raises the earths temperature.
Hope this helps :)
Hope you have a great day !
I WILL GAVE BRAINLIEST FOR CORRECT ANSWER
Use the information to answer the following question.
Hot air balloons use a flame that can turn on and off to heat air inside a large balloon. The balloon is attached to a basket which can carry people or cargo as it is lifted off the ground and floats in the air.
Using what you know about gases, predict which approach would allow the hot air balloon to reach the highest height?
A.
Turn on the flame for 10 seconds each minute for 10 minutes to increase the density of the air inside the balloon.
B.
Turn on the flame for 10 seconds each minute for 2 minutes, and cut a large hole in the balloon material to allow excess air out.
C.
Turn on the flame for 30 seconds each minute for 10 minutes to decrease the density of the air inside the balloon.
D.
Turn on the flame for 30 seconds each minute for 2 minutes, and cut a large hole in the balloon material to allow excess air out.
Answers
Answer:
c
Explanation:
Answer:
C. Turn on the flame for 30 seconds each minute for 10 minutes to decrease the density of the air inside the balloon.
Explanation:
What causes atoms to share electrons equally with atoms, but unequally share with others?
Answers
Answer:
Atoms only share electrons in covalent bonds. covalent bonds are only formed between nonmetals. there are two different types of covalent bonds; polar and nonpolar. in a polar covalent bonds electrons are shared unequally because one atom has a stronger force of attraction than the other (EX. H2O). In a nonpolar covalent bond, the electrons are shared equally because they're electronegativity is also equal (EX. Cl2).
Overall, the atoms electronegativity determines the way it shares electrons
Explain the effect of increasing or
decreasing volume of a gas. What
happens to the pressure?
Answers
Answer:
Increase
Explanation:
More collisions mean more force, so the pressure will increase. When the volume decreases, the pressure increases. This shows that the pressure of a gas is inversely proportional to its volume.
AIDS is one disease caused by a virus infection. The virus attacks immune system cells known as T cells.
Based on your observations from the Gizmo, how would you explain the data shown on this graph?
Answers
Answer:
yes,its true
Explanation:
I just want to say first off
the immune cell known as T cell also known as white blood cells
Since the first main attack from the bodies response against a virus is deploying T cells to attack
CD4 cells are the basic T cells and HIV virus which is AIDS will start to "Eat itself inside" Ofc not they will use protein spikes to form their way in
they start to create copies of themselves inside the T cell itself and creating a new protein called Env to form their ways in ofc
They are able to bypass CD4 cells is because its a basic cellular receptor for T cells making them really deadly
They now will start to attack other white cells and deploying more and more of their virus cells
In which of the following options can competition occur?
b
с
Between two
organisms that are
attempting to use
different resources
that are in short
supply
Between two
organisms that are
attempting to use
the same resource
that is in short
supply
Between two
organisms that are
attempting to use
the same resource
that is in limitless
supply
Answers
Answer: no answer
Explanation:
no anwser
Help I’m timed!
How are all planets in the solar system similar they have a gas atmosphere, they have a water atmosphere, we have a gas surface composition, they have a rock surface composition.
Answers
Answer:
they hace a rock surface composition
A gas occupies 5.31 liters at a pressure of 0.55 atm. Determine the volume at standard pressure.
A. 2.92
B. 8.28L
C. 3.54 L
D. 9.65L
Answers
Answer:
Option A; V = 2.92 L
Explanation:
If we assume a lot of things, like:
The gas is an ideal gas.
The temperature is constant.
The gas does not interchange mass with the environment.
Then we have the relation:
P*V = n*R*T = constant.
Where:
P = pressure
V = volume
n = number of moles
R = constant of the ideal gas
T = temperature.
We know that when P = 0.55 atm, the volume is 5.31 L
Then:
(0.55 atm)*(5.31 L) = constant
Now, when the gas is at standard pressure ( P = 1 atm)
We still have the relation:
P*V = constant = (0.55 atm)*(5.31 L)
(1 atm)*V = (0.55 atm)*(5.31 L)
Now we only need to solve this for V.
V = (0.55 atm/ 1 atm)*(5.31 L) = 2.92 L
V = 2.92 L
Then the correct option is A.
Calculate the formula weight or molecular for the following:
a. LiCI
b. SO2 (The 2 is in subscript)
Answers
Answer:
42.39, 64.06
Explanation:
Formula Weight can be calculated by adding the atomic mass of the elements in the formula.
LiCl
AM for Li is 6.94 amu, AM for Cl is 35.45 amu
[tex](6.94)+(35.45)=42.39[/tex]
SO₂
AM for S is 32.06 amu, AM for O is 16 amu
[tex](32.06)+2(16.00)=64.06[/tex]
define carbon and itz state in which it is found
Answers
Answer:
Carbon is a nonmetal which has two mains; diamond and graphite.
Carbon is found in a solid state.
Explanation:
from what material does an extrusive rock form
Answers
Answer:
Magma!
Explanation:
It's pretty interesting actually! The magma was poured out/ejected at Earth's surface.
(04.04 MC)
Which table best shows the impacts resulting from human activity? (6 points)
Answers
Answer:
B
Explanation:
Answer:
B its correct because i did the test.
Explanation: