Boiling point-methanol (65.0) 66.8c.Boiling point-unknown (record from video)——-c
Identify of unknown:
Possibilities are:Mathanol65.0c;Ethanol 78.5c; Acetone 56.0C

Answers

Answer 1
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Related Questions

2.67 Determine the density (g/mL) for each of the following:
a. A 20.0-mL sample of a salt solution has a mass of 24.0 g.

Answers

1.2 g/mL, you find this by dividing 24.0g by 20.0 mL

The density (g/mL) for a 20.0-mL sample of a salt solution has a mass of 24.0 g is 1.2 g/ml.

What is density?

Density is the mass per unit volume. Density is a scalar quantity. It is denoted by d and the symbol for density is given as rho, a Greek symbol. Density is calculated as mass divided by volume.

Mass is the quantity of matter in a physical body. The product of the molar mass of the compound and the moles of the substance are defined as mass.

Volume is the space occupied by a three-dimensional object. Volume is calculated by dividing mass by density.

Given, the 20.0-mL sample of a salt solution, which is the volume.

The mass of the solution is 24.0 g

To calculate the density

mass/volume

24.0 / 20.0 = 1.2 g/ml

Thus, the density of the given salt solution is 1.2 g/ml.

To learn more about density, refer to the link:

https://brainly.com/question/17851361

#SPJ2

Which of the following ions is formed when an acid is dissolved in a solution? (5 points)
H+
O−
OH−
SO42+

Answers

Answer:

H +

Explanation:

Acid are those species which donates the H+ ion when dissolved in a solution. In other way acid are those chemical species which donate proton to other species as proton means H+ ion so H+ ions are formed as a result of dissolution ..


ci Metal displaces 50cm of water
when completely immersed in water if the mos
of the metal is 35.0q, calculate its
density​

Answers

Answer:

0.70 g/cm³

Explanation:

Step 1: Given data

Volume of water displaced by the metal (V): 50 cm³ (this is equal to the volume of the metal)Mass of the metal (m): 35.0 g

Step 2: Calculate the density (ρ) of the metal

Density is an intrinsic property of matter. It is equal to the mass of the metal divided by its volume.

ρ = m/V

ρ = 35.0 g/50 cm³ = 0.70 g/cm³

12.0: A
Mention three body fluids that are alkaline in nature​

Answers

Paricardial fluid, blood, interstitial fluid, and lymph.

You pick from the 4

2.
A solution contains 50 g of KCl per 100 g of water at
90°C. Is the solution unsaturated, saturated or
supersaturated?
unsaturated, saturated or supersaturated?

Answers

The solution is a saturated solution.

what is a colloidal with liquid as both dispersed phase and dispersion medium called?​

Answers

Answer:

A colloidal system in which liquid is a dispersed phase and solid is dispersion medium is known as Gel.

Explanation:

Which state of matter is characterized by having an indefinite shape, but a definite volume?


solid

gas

liquid

Answers

Answer:

liquid is the right answer k

Answer:

liquid

Explanation:

Draw the predominant product(s) of the following reactions including stereochemistry when it is appropriate. CH3CH2 C C CH3 H2O/H2SO4/HgSO4

Answers

Answer:

Draw the predominant product(s) of the following reactions including stereochemistry when it is appropriate.

CH3CH2 C C CH3 H2O/H2SO4/HgSO4

Explanation:

The given compound is: pent-2-yne.

When it reacts with water, in presence of sulphuric acid and mercuric sulphate then a ketone is formed as shown below:

This reaction is an example of nucleophilic attack of water on carbon carbon triple bond.

The general mechanism of the reaction is hsown below:

Pent-2-yne reacts with water and form 3-pentanone.

The reaction is shown below:

When a liquid is heated the average what? Of energy of its particles will increase

Answers

When a substance is heated, it gains thermal energy. Therefore, its particles move faster and its temperature rises.

Hydrogen and chlorine gases react to form HCl. You and a friend are on opposite sides of a long hallway, you with H2 and your friend with Cl2. You both want to form HCl in the middle of the room. Which of the following is true?
a) You should release the H2 first.
b) Your friend should release the Cl2 first.
c) You both should release the gases at the same time.
d) You need to know the length of the room to answer this question.
e) You need to know the temperature to answer this question.

Answers

Answer: It is true that Your friend should release the [tex]Cl_{2}[/tex] first.

Explanation:

The velocity of particles of a gas is inversely proportional to the mass of gas. This means that more is the mass of gas less will be its velocity.

Or, more will be the mass of gas more slowly it will move from one place to another.

The molar mass of chlorine gas is more than the molar mass of hydrogen gas. Therefore, chlorine gas will move slowly.

So, your friend should release the [tex]Cl_{2}[/tex] gas first and then according to the length of room you should release the [tex]H_{2}[/tex] gas.

Thus, we can conclude that it is true that Your friend should release the [tex]Cl_{2}[/tex] first.

To prepare a sample in a capillary tube for a melting point determination, gently tap the tube into the sample with the ___________ end of the tube down. Continue tapping until the sample. _____________ Then, with the __________ end of the tube down, tap the sample down slowly or __________ to move the sample down faster. Finally, make sure that you can see ___________ in the magnifier when placed in the melting point apparatus before turning on the heat.

Answers

Answer: Hello I was able to find the missing options related to your question online but I couldn't attach them hence I just used them to provide the relevant solution

answer:

Open Is a couple of millimeters highclosed Drop tube into a longer tube sample clearly

Explanation:

OPEN end of the tube down. Continue tapping until the sample. Is a couple of mm high Then, with the Closed end of the tube down, tap the sample down slowly or drop tube into a longer/larger tube to move the sample down faster. Finally, make sure that you can see  sample clearly in the magnifier when placed in the melting point apparatus before turning on the heat.

You HAVE 1L of 2.0 mol/L HCI. You want to dilute the solution to a concentration of 0.1 mol/L. What volume of the new solution (V2)?

0.05 L

O 20L

0.2 L

Answers

Given:

M₁ = 2.0 mol/L

V₁ = 1 L

M₂ = 0.1 mol/L

Required:

V₂

Solution:

M₁V₁ = M₂V₂

V₂ = M₁V₁ / M₂

V₂ = (2.0 mol/L)(1 L) / (0.1 L)

V₂ = 20 L

Therefore, the volume of the new solution will be 20 L.

#ILoveChemistry

#ILoveYouShaina

M₁V₁ = M₂V₂

V₂ = M₁V₁ / M₂

V₂ = (2.0 mol/L)(1 L) / (0.1 L)

V₂ = 20 L

THE BEST ANSWER IS

O 20L

A solution of KMnO4 has an absorbance of 0.539 when measured in the colorimeter. Determine the concentration of the KMnO4 given the following data for a calibration plot.

Concentration of KMNO4 (M) Absorbance
0.0150 0.081
0.0300 0.159
0.0450 0.260
0.0600 0.334

Answers

Answer:

Concentration of unknown solution is 0.0416 M

Explanation:

As we know  

Absorbance is equal to the product of molar absorptivity of KMnO4 m, path length and concentration

From the given set of graphical data, it is clear that the absorbance vs concentration is a straight line.  

From the graph, we can obtain-  

Y = 5.73 X – 0.0065

Absorbance = 0.232

0.232 = 5.73 X – 0.0065

X = 0.0416  

Concentration of unknown solution is 0.0416 M

What waves are used to send signals because they can travel over very long distances and pass through buildings

Answers

Answer:

sound waves for used I think

Convert the following:
1) 367.5 mg = _______ g
2) 367 mL = _______ L
3) 28.59 in =______ cm
4) 8 0z =_______lb
5) 0.671 mm =_____m

Answers

1: 367.5mg=0.3675g
2: 367mL=0.367L
3: 28.59 in = 72.6186 cm
5:0.671mm=0.000671

Helllppp asapppp
Which of the following is matter?
O A. Light
O
B. Sound
O C. Atoms
O D. Radio waves

Answers

The answer is ATOMS, because matter is a solid, liquid, or gas…
c atoms All matter is made up of atoms, which are in turn made up of protons, neutrons and electrons. ... Both atoms and molecules are held together by a form of potential energy called chemical energy.

3. 3. A 90.-mL sample of juice was titrated with the I2(aq) solution described above using a sb buret. The initial reading of the sb buret was 58.3 mL. When the endpoint was reached, the reading on the sb buret was 26.9 mL. How many mg of Vitamin C were in the juice sample

Answers

Answer:

2765mg of Vitamin C assuming the concentration of I2 = 0.500M

Explanation:

Iodine, I2, reacts with vitamin C in a ratio of 1:1 (The moles of  I2 added = Moles of Vitamin C in the sample). To solve this question we must find the difference in volume from the initial reading to the endpoint reading. Now, ASSUMING the molar concentration of the I2(aq) solution is 0.500M we can find the moles of I2 = Moles of Vitamin C. With its molar mass -176.12g/mol- we can find its mass:

Moles I2:

Volume  = 58.3mL - 26.9mL = 31.4mL = 0.0314L * (0.500mol / L) = 0.0157 moles I2 = Moles Vitamin C

Mass Vitamin C:

0.0157 moles * (176.12g/mol) = 2.765g of Vitamin C * (1000mg/1g) =

2765mg of Vitamin C assuming the concentration of I2 = 0.500M

Round 5578 L to three significant figures.

a. 557 L

b. 558 L

c. 5.58 x 10(3) L

d. 5.58 x 10(-3) L

Answers

Answer:

b

Explanation:

The figures of a number that are noteworthy in high accuracy or precision are known as significant figures. They are as follows:

Any digit that isn't zeroAs in 20012 or 64.60007, there are zeros between non-zero numbers.Only use leading zeros when a decimal point is present, such as in 5640.0 or 532.330.If the figure is less than 5, remove it and leave the rest of the number unaffected but if more than 5 add, round it up to 1, and add it to the next figure in the line.

From the given information:

To (3) sig. fig: 5578 L = 558 L

What would you use to measure
to measure an amount of solid sodium chloride(NaCI)
crystals to add to a 30 mL solution?
A. Triple Beam Balance that measures to the nearest 0.1 grams.
) B. 10 ml graduated cylinder.
Scale that can weigh up to 250 lbs.
D. Spectrophotometer that measures between 100 and 900 nanometers.

Answers

the answer is a. triple beam balance

Identify the indicated protons in the following molecules as unrelated, homotopic, enantiotopic, or diastereotopic. a) Methyls a & b: _________ b) Ha & Hc: _________

Answers

Answer:

Identify the indicated protons in the following molecules as unrelated, homotopic, enantiotopic, or diastereotopic. a) Methyls a & b: _________ b) Ha & Hc: ________

Explanation:

Homotopic hydrogens:

Consider two hydrogens in the given molecule and replace one by one with a different atom say for example deuterium, then if the two molecules formed by replacing hydrogens are the same then the two hydrogens are called homotopic hydrogens.

After replacing the two hydrogens with a different atom then, enantiomers are formed then, the two hydrogens are called enantiotopic hydrogens.

After replacing the two hydrogens with a different atom then, diastereomers are formed then, the two hydrogens are called diastereotopic hydrogens.

In the methyl group, select two hydrogens and replace one hydrogen atom with a D-atom name the compound.

Again replace another hydrogen atom with D-atom.

Name it.

If both are the same then, the hydrogens are homotopic and they are shown below:

Hence, they are homotopic protons.

0.159 mol 2.25 M = A L of HCI

Answers

Answer:

hmmm?what?

Explanation:

ayusin mo flece:>

Answer will be
0.159 mol
2.25 M
= A L of HCI
.0707

Hope this helps.

What is the specific heat value of brass?

Answers

Answer:

Nhiệt dung riêng của đồng là  

380

J

/

k

g

.

K

Explanation:

0.380 0.092
T4: Specific Heats and Molar Heat Capacities
Substance cp in J/g K cp in cal/g K or Btu/lb F
Aluminum 0.900 0.215
Bismuth 0.123 0.0294
Copper 0.386 0.0923
Brass 0.380 0.092

A flexible vessel contains 65.8 L of gas at a pressure of 2.07 atm. Under the conditions of constant temperature and constant number of moles of gas, what is the pressure of the gas (in atm) when the volume of the vessel increased by a factor of 16.00

Answers

Answer: Pressure of the gas is 0.129375 atm when the volume of the vessel increased by a factor of 16.00.

Explanation:

The formula for ideal gas equation is as follows.

[tex]PV = Nk_{b}T[/tex]

where,

[tex]k_{b}[/tex] = Boltzmann constant

N = number of moles

That can also be written as:

[tex]\frac{PV}{T} = constant[/tex]

As pressure and volume are inversely proportional to each other. So, if one of the state variable is increased then the other one will decrease or vice-versa.

So, if volume of the vessel increased by a factor of 16.00 then it means pressure is decreased by a factor of 16.00

Therefore, final volume is as follows.

[tex]65.8 L \times 16.00\\= 1052.8 L[/tex]

Now, final pressure is as follows.

[tex]\frac{2.07}{16.00}\\= 0.129375 atm[/tex]

Initially the product of pressure and volume is as follows.

[tex]PV = 2.07 \times 65.8\\= 136.206[/tex]

Hence, if volume of the vessel increased by a factor of 16.00 and pressure is decreased by a factor of 16.00 then its product is as follows.

[tex]PV = 0.129375 \times 1052.8\\= 136.206[/tex]

Here, product of pressure and volume remains the same.

Thus, we can conclude that pressure of the gas is 0.129375 atm when the volume of the vessel increased by a factor of 16.00.

The oxygen atom of a ketone (such as cyclohexanone) contains 2 lone pairs of electrons. These pairs of electrons most likely reside in what type of orbital

Answers

Answer: The given pairs of electrons most likely reside in [tex]sp^{2}[/tex] type of orbital.

Explanation:

As it is given that two lone pair of electrons are present on the oxygen atom of ketone (such as cyclohexanone).

Also, there will be one bond pair between carbon and oxygen atom.

Hence, total electrons present in the domain are as follows.

2 lone pairs + 1 bon pair of electron = 3 electron domains

This means that there will be [tex]sp^{2}[/tex] type of orbital present.

Thus, we can conclude that given pairs of electrons most likely reside in [tex]sp^{2}[/tex] type of orbital.

Lab 2: paper chromatography of organic dyes
Picture of questions below.

Answers

Answer:

The three primary colors used when mixing dyes or paints are red, yellow, and blue. Other colors are often a mixture of these three colors. Try running a chromatography test again with non-primary-color markers, like purple, brown, and orange.

Explanation:

Mixtures that are suitable for separation by chromatography include inks, dyes and colouring agents in food. ... As the solvent soaks up the paper, it carries the mixtures with it. Different components of the mixture will move at different rates. This separates the mixture out.

What is the speed of a wave with a frequency of 2 Hz and a wavelength of 87m (subject is science) pls answer fast

Answers

Answer:

43.5

Explanation:

Hope that helps

What are the lengths of the diagonals of the kite?

Answers

The answer ( 13 and 8 )

x²=5²+12²

x²=25+144

x²=169

x=13

x²=5²+6²

x²=25+36

x²=61

x=7.8

x=8

Whether or not the process is observed in nature, which of the following could account for the transformation of phosphorus-28 to silicon-28?

a. beta decay.
b. eletron capture
c. positron emission
d. alpha decay

Answers

Answer:

positron emission

Explanation:

Positron emission,involves the decrease in the nuclear positive charge thus the atomic number of the daughter nucleus decreases by one unit compared to that of the parent nucleus while the mass number of the daughter nucleus remains the same as that of the parent nucleus.

Thus, when phosphorus-28 is transformed into to silicon-28, a positron emission has taken place because the mass number of the daughter nucleus remained the same while the atomic number of the daughter nucleus was decreased by one unit.

once water reach its boiling point what does you notice about its temperature??​

Answers

it will stay at a constant temperature while it is boiling which is 212°F

According to hydrogen’s chemical properties, it belongs in the same group as:
1. alkali metals
2. alkaline earth metals
3 .halogens
4. both a and c

---
Select the following group of elements that contains elements with similar chemical properties
A.
N, As, Bi
B.
Rb, Sn, In
C.
Li, Mg, Ga
D.
W, Tc, Fe
---

Answers

A) 1 B) C - hope it help
Other Questions
describe how potatoes and eggs might have been digested with the help of enzymes. 09:30 to 17:00 minus 30 minutes How many hours is that ? The parabola described by the equation -1/16(x-3)^2 + 4 = y has the directrix at y=8. What is the focus of the parabola? Read the excerpt from The Odyssey.The wind that carried west from Iliumbrought me to Ismarus, on the far shore,a strongpoint on the coast of Cicones.I stormed that place and killed the men who fought.Plunder we took, and we enslaved the women,to make division, equal shares to allbut on the spot I told them: 'Back, and quickly!Out to sea again!' My men were mutinous,fools, on stores of wine. Sheep after sheep theybutchered by the surf, and shambling cattle,feasting,while fugitives went inland, runningto call to arms the main force of Cicones.This was an army, trained to fight on horsebackor, where the ground required, on foot. They camewith dawn over that terrain like the leavesand blades of spring. So doom appeared to us,dark word of Zeus for us, our evil days. My men stood up and made a fight of it60backed on the ships, with lances kept in play,from bright morning through the blaze of noonso holding our beach, although so far outnumbered;Which central idea should be included in a paraphrase of this excerpt? What is the standard enthalpy change for the decomposition of one mole of SO3? Simplify 6V 80.0 6+16 510 6+4150 6+1615O 6+4v5i The sum of $4500 is divided among Anesha, Sian and Joanne in the ratio 7: 11: 12respectively.Calculate(i) The amount of money each person received (ii) The percentage of the total that Joanne received. y=5/2x-5/6find the slope and simplify Which of the following best describes the relationship between human population size and resource use?Countries with high populations are likely to use more resources.Countries with high populations are likely to use fewer resources.Countries with low populations are likely to use more resources.There is no correlation between population size and resource use. The Tables Turnedby William WordsworthWhich two themes are developed in the poem?A: people should be more willing take risks to get what they want.B:Experiencing the natural world is more valuable than formal studyC: to understand something a person needs to practice observationD: people shouldnt live their lives in a way that respects the environmentE: experiencing the joy of education requires patience and reflection give few property of PET In the circle below, AD is a diameter and AB is tangent at A. suppose mADC=228. Find the measures of mCAB and mCAD. Type your numerical answers without units in each blank Interest earnings of 4 percent with a $450 minimum balance; average monthly balance, $600; monthly service charge of $20 for falling below the minimum balance, which occurs five times a year (no interest earned in these months). (Do not round intermediate calculations. Round your answer to 2 decimal places. Input the amount as a positive value.) essay on personal assistants who is the president of South Africa? need answer with step by step what is 5\8 divided by 1\4 Which sentence option is punctuated correctly?A. If Jenn, goes to summer camp like I want her to I hope she is inmy cabin.B. If Jenn goes to summer camp, like I want her to, I hope she is inmy cabin.C. If Jenn goes to summer camp like I want her to I hope, she is inmy cabin.D. If Jenn goes to summer camp, like I want her to I hope she is in mycabin. When they are trying to study together, what does Melanie point out that Danny is doing? aTapping his foot nervously bTapping his pencil nervously cSweating dBreathing heavily eDrooling write a poem on the theme of relationship or identity