A chemist working as a safety inspector finds an unmarked bottle in a lab cabinet. A note on the door of the cabinet says the cabinet is used to store bottles of carbon tetrachloride, diethylamine, methyl acetate, ethanolamine, and dimethyl sulfoxide.

The chemist plans to try to identify the unknown liquid by measuring the density and comparing to known densities. First, from his collection of Material Safety Data Sheets (MSDS), the chemist finds the following information:

Liquid Density
Tetrahydrofuran 0.89·gcm^−3
Carbon tetrachloride 1.6·gcm^−3
Pentane 0.63·gcm^−3
Dimethyl sulfoxide 1.1·gcm^−3
Acetone 0.79·gcm^−3.

Next, the chemist measures the volume of the unknown liquid as 0.852L and the mass of the unknown liquid as 938.g . Calculate the density of the liquid.

Answers

Answer 1

Answer: The density of the liquid is [tex]1.10g/cm^3[/tex]

Explanation:

Density is defined as the mass contained per unit volume.

[tex]Density=\frac{mass}{Volume}[/tex]

Given : Mass of the unknown liquid  = 938 grams

Volume of the unknown liquid = [tex]0.852L=852cm^3[/tex]  [tex](1L=1000cm^3[/tex]

Putting in the values we get:

[tex]Density=\frac{938g}{852cm^3}[/tex]

[tex]Density=1.10g/cm^3[/tex]

Thus the density of the liquid is [tex]1.10g/cm^3[/tex] and the liquid is dimethyl sulfoxide.


Related Questions

which statement describes the process of budding​

Answers

Answer:

Budding, in biology, a form of asexual reproduction in which a new individual develops from some generative anatomical point of the parent organism. ... The initial protuberance of proliferating cytoplasm or cells, the bud, eventually develops into an organism duplicating the parent.

Explanation: im not sure if this will help because you didnt give any statements.

Answer: Cell division with mitosis causes new individuals to develop on a parent.

Explanation: did the test A.P.E.X. hope this helps <3

Ammonia can be made by reaction of water with magnesium nitride as shown by the following unbalanced equation: Mg3N2(s) + H2O(l)  Mg(OH)2(s) + NH3(g) If this process is 71% efficient, what mass of ammonia can be prepared from 24.5 kg magnesium nitride?

Answers

The link above is a scam

The mass of ammonia prepared from 24.5 kg magnesium nitride, according to the reaction Mg₃N₂(s) + 6H₂O(l) → 3Mg(OH)₂(s) + 2NH₃(g), knowing that the process is 71% efficient is 5.87 kg.

The balanced reaction of production of ammonia is:

Mg₃N₂(s) + 6H₂O(l) → 3Mg(OH)₂(s) + 2NH₃(g)   (1)

First, let's find the number of moles of magnesium nitride

[tex] n_{Mg_{3}N_{2}} = \frac{m_{Mg_{3}N_{2}}}{M_{Mg_{3}N_{2}}} [/tex]  (2)

Where:

[tex]m_{Mg_{3}N_{2}}[/tex]: is the mass of Mg₃N₂ = 24.5 kg

[tex]M_{Mg_{3}N_{2}}[/tex]: is the molar mass of Mg₃N₂ = 100.9494 g/mol

The number of moles is (eq 2):

[tex] n_{Mg_{3}N_{2}} = \frac{m_{Mg_{3}N_{2}}}{M_{Mg_{3}N_{2}}} = \frac{24500 g}{100.9494 g/mol} = 242.70 \:moles [/tex]

We can calculate the mass of ammonia prepared, knowing that 1 mol of Mg₃N₂ reacts with 6 moles of H₂O to produce 3 moles of Mg(OH)₂ and 2 moles of NH₃ (reaction 1).

[tex]n_{NH_{3}} = \frac{2\: moles\: NH_{3}}{1\: mol\: Mg_{3}N_{2}}*n_{Mg_{3}N_{2} = \frac{2\: moles\: NH_{3}}{1\: mol\: Mg_{3}N_{2}}*242.70 \:moles \:Mg_{3}N_{2} = 485.4 \:moles[/tex]

Then, the mass of NH₃ is:

[tex] m_{NH_{3}} = n_{NH_{3}}*M_{NH_{3}} = 485.4 \:moles*17.031 g/mol = 8266.8 g = 8.27 kg [/tex]

Since the process is 71% efficient, the mass that can be prepared is:

[tex] m = 8.27 kg*0.71 = 5.87 kg [/tex]

Therefore, the mass of ammonia that can be prepared is 5.87 kg.

I hope it helps you!

Pls help me over here

Answers

Answer:

1 and the element is hydrogen (there is an exception for the octet rule for the element hydrogen) hope this helps

Explanation:

Lewis dot diagram for the Cs1+ ion

Answers

Answer:

[tex]Cs^+[/tex]

Explanation:

Cesium Lewis dot structure would look like this:

·Cs,  because it only has one valence electron. But, since it has a plus, that means we lost an electron. So, we have to get rid of the dot and you have:

[tex]Cs^+[/tex]

What volume of 1.75 M hydrochloric acid (HCl aq) must be diluted with water to prepare 0.500 L of 0.250 M hydrochloric acid?

Answers

Answer:

[tex]V_1=0.0714L[/tex]

Explanation:

Hello there!

In this case, since we need to dilute the 1.75-M HCl, and the total number of moles remain unchanged, we can write:

[tex]n_1=n_2[/tex]

And in terms of volume and concentration:

[tex]C_1V_1=C_2V_2[/tex]

Thus, we can solve for the volume of the concentrated HCl as shown below:

[tex]V_1=\frac{C_2V_2}{C_1}[/tex]

Therefore, we plug in the data to get:

[tex]V_1=\frac{0.250M*0.500L}{1.75 M}\\\\V_1=0.0714L[/tex]

Best regards!

If you began a reaction with the following ions in solution, what would be the net ionic equation?
Na+, PO43–, Fe2+, and NO3–

Answers

Answer:

2 PO₄³⁻(aq) + 3 Fe²⁺(aq) ⇒ Fe₃(PO₄)₂

Explanation:

Let's consider the complete ionic equation between the ions present. It includes all the ions and the insoluble compounds (Fe₃(PO₄)₂ is insoluble).

Na⁺(aq) + 2 PO₄³⁻(aq) + 3 Fe²⁺(aq) + NO₃⁻(aq) ⇒ Fe₃(PO₄)₂ + Na⁺(aq) + NO₃⁻(aq)

The net ionic equation includes only the ions that participate in the reaction (not spectator ions) and the insoluble compounds.

2 PO₄³⁻(aq) + 3 Fe²⁺(aq) ⇒ Fe₃(PO₄)₂

4. What is the specific heat of a substance if 5800 joules is
released in a 250 gram sample that will cool the substance from
60 degrees to 45 degrees?

Answers

Answer: 23.2

Explanation:

An empty steel container is filled with 2.0 atm of H₂ and 1.0 atm of F₂. The system is allowed to reach equilibrium according to the reaction below. If Kp = 0.45 for this reaction, what is the equilibrium partial pressure of HF?

Answers

The equilibrium partial pressure of HF is 0.55 atm.

The equation of the reaction is;

        H2(g) + F2(g) ⇄ 2HF

I         2           1             0

C       -x           -x            +x

E     2 - x        1 - x           x

We know that;

pH2 = 2.0 atm

PF2 =  1.0 atm

pHF = ??

Kp = 0.45

So;

Kp = (pHF)^2/pH2. pF2

0.45 = x^2/(2 - x) (1 - x)

0.45 =  x^2/x^2 - 3x + 2

0.45(x^2 - 3x + 2) = x^2

0.45x^2 - 1.35x + 0.9 =  x^2

0.55 x^2 + 1.35x - 0.9 = 0

x = 0.55 atm

Learn more about equilibrium: https://brainly.com/question/3980297

? I JUST DONT UNDERSTAND

Answers

Answer:

5SiO2 + 2CaC2 → 5Si + 2CaO + 4CO2

Explanation:

When you are balancing an equation, you use coefficients to change the number of atoms of each type that are on each side of the equation.

You cannot change subscripts, the small numbers to the right of the substances. You can only add coefficients, the large numbers to the left of substances.

A balanced equation has the same number and type of atoms on both sides of the equation (the reactants on the left, the products on the right).

To begin, this equation has:

1 Si

2 O

1 Ca

2 C  

on the left and

1 Si

1 Ca

3 O

1 C

on the right. Those numbers don't match!

By adding coefficients we end up with 5 Si, 10 O, 2 Ca and 4 C on both sides.

adaptive features of aquatic plants​

Answers

Aquatic plants can only grow in water or in soil that is frequently saturated with water. They have leaves with large air pockets allowing them to absorb oxygen from the water (they should have one air bubble in each leaf). The leaves of aquatic plants are soft. It allows them to move smoothly/easily with the waves.

Given 1.67 moles of K, how many moles of KBr are produced?
2 K+ 1 Br2---> 2 KBr

Answers

Answer:

[tex]\displaystyle 1.67 \ mol \ KBr[/tex]

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

BracketsParenthesisExponentsMultiplicationDivisionAdditionSubtractionLeft to Right

Chemistry

Atomic Structure

Moles

Stoichiometry

Using Dimensional AnalysisAnalyzing Reactions RxNExplanation:

Step 1: Define

[RxN - Balanced] 2K + Br₂ → 2KBr

[Given] 1.67 moles K

[Solve] moles KBr

Step 2: Identify Conversions

[RxN] 2 mol K → 2 mol KBr

Step 3: Stoichiometry

[DA] Set up conversion:                                                                                 [tex]\displaystyle 1.67 \ mol \ K(\frac{2 \ mol \ KBr}{2 \ mol \ K})[/tex][DA] Multiply/Divide [Cancel out units]:                                                         [tex]\displaystyle 1.67 \ mol \ KBr[/tex]

Draw the structure formula for
1-ethyl-2,3-dimethylbenzene

Please help me

Answers

Answer:

Please see the attached picture.

Explanation:

1) Draw a benzene ring

2) On the first carbon, add a CH₂CH₃ (known as ethyl) since its location number is 1.

3) 'Dimethyl' refers to 2 methyl (CH₃) branches. The location numbers are 2 and 3, thus add a CH₃ on the 2nd and 3rd carbons.

I need help plzzzzzz​

Answers

I think 25%?
I hope this helps

Answer:

it is 25%

Explanation:

Answering so you can give the other person brainliest :D have a good day

What does synthesis gas (water gas) consist of?​

Answers

Answer:

ch4+h2o----725°-->co+2h2

25 jejejejdhdbbdbdbdbd

What BEST describes the relation of a new population to an increase in the amount of space it occupies? a - The population will die out
b - The population will remain constant
c - The population will grow exponentially

Answers

answer c is correct

can someone help me with this will mark brainliest

Answers

Answer:

3

Explanation:

Do you think humans are responsible for global warming trends? Why or why not?

Answers

Answer:

Yes. At least some. There has been ups and downs in temperature ever since the Earth was created, and this is just another up in temperature. I do think that humans have made it worse though, with all of the greenhouse gases and things like that.

3. Define the term zwitterion. Draw the structure of alanine and explain why this molecule is a
zwitterion in certain conditions.

Answers

Answer:

A zwitterion or a hybrid ion is an ion that has both a positive and negative charge and can act as either a base or an acid.

Explanation:

A zwitterion or a hybrid ion is an ion that has both a positive and negative charge and can act as either a base or an acid. The net charge on a zwitterion is zero since it has equal number of positive and negative charges.

Alanine, is a monoamino monocarboxylica acid that is diprotic when fully protonated. The carboxylic acid group, COOH and the amino group, NH₃⁺, are able to produce one proton each. At a pH equal to the isoelectric point of alanine, it exists mainly in the zwitterionic form with the α-amino group protonated as NH₃⁺ and the α-carboxyl group deprotonated as COO⁻ . This is because at the isoelectric point of alanine (6.0), pI is greater than the acid dissociation constant, pKa of the α-carboxyl group whereas, pI is less than the acid dissociation constant, pKa of the α-amino group, so the two groups are negatively and positively charged respectively.

A vitamin C (ascorbic acid) tablet was dissolved in approximately 50 mL of distilled water and titrated with the standardized NaOH solution. From the results of this titration, the mg of ascorbic acid in the tablet was calculated. Molecular formula of ascorbic acid: C6H8O6 Volume of NaOH required to neutralize ascorbic acid in Vitamin C tablet (mL) 20.74 Concentration of NaOH in mol/L, 0.201 Calculate the amount of ascorbic acid in the Vitamin C tablet in (mg).

Answers

Answer:

The correct answer is - 733.69 mg.

Explanation:

given:

The volume of ascorbic acid = 50 ml

The volume of NaOH = 20.74 ml

Molarity of NaOH = 0.201 M

formula = C6H8O6

Solution:

moles of NaOH for titration = molarity of NaOH × The volume of NaOH

= 0.201 × 20.74 × 10^-3

=4.16874 × 10^-3

then molecular weight of ascorbic acid

= 6 × 12+ 8×1+ 6× 16

=176g/mol

the molecular mass would be

= 4.16874 × 10^-3 × 176

= 733.69 × 10^-3 g

=733.69 mg

The nucleus of an atom stays together only because the repulsive forces, called
forces, are overcome by
even stronger attractive forces.
fusion
nuclear
electrostatic

Answers

Answer:

Electrostatic

Explanation:

The forces that are overcome are the repulsive electrostatic forces between the protons (all charged positively).

Determine if the following two structures are
identical, isomers, or unrelated?
A
B
С
identical
isomers
unrelated

Answers

Answer:

its C

Explanation:

The skeletal structure shows the outline of the compound with lines and bonds. Both the structures are unrelated. Thus, option C is correct.

What are isomers?

Isomers are structures with identical molecular structures but differ in the skeletal or molecular representation. They also have varied properties as compared to the parent structure.

Identical compounds are structures that have the same atoms and are arranged with the same spatial design and orientation. The number of atoms and the spatial arrangement of the two compounds is different.

Therefore, the two compounds are unrelated.

Learn more about isomers here:

https://brainly.com/question/26658261

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A student mixes 5.00 mL of 0.0020 M Fe(NO3)3 with 3.00 mL of 0.0020 M KSCN solution and 2.00 mL water at a certain temperature. He places a sample of the resulting solution in a spectrometer, and measures the transmittance as 23% at 447 nm. What are the initial concentrations of [Fe3 ] and [SCN-]

Answers

Answer:

[Fe⁺³] = 0.0010 M

[SCN⁻] = 0.0006 M

Explanation:

First we calculate how many moles of Fe⁺³ and SCN⁻ were added, using the given volumes and concentrations:

Fe⁺³ ⇒ 5.00 mL * 0.0020 M = 0.010 mmol Fe⁺³SCN⁻ ⇒ 3.00 mL * 0.0020 M = 0.006 mmol SCN⁻

Now we can calculate the initial concentrations, after calculating the new volume of the solution:

New volume = 5.00 mL + 3.00 mL + 2.00 mL = 10.00 mL[Fe⁺³] = 0.010 mmol / 10.00 mL = 0.0010 M[SCN⁻] = 0.006 mmol / 10.00 mL = 0.0006 M

State the coefficient required to correctly balance the following chemical equation:
__KCI + __Fe —-> __FeCI2+ __K

Answers

Answer:

2KCl+Fe---->FeCl2+2K

Explanation:

You can observe that the no.of atoms in reactant side is equal to that of products side of each element.

hi!! can somebody help me with this question?


which is the best example of commensalism?

A. honey bees feed on the pollen of cornflowers and help the flowers reproduce

B. barnacles ride on a gray whales back to obtain food, and the whale is not harmed

C. squirrels and chipmunks eat the same nuts in a forest where food is scarce

D. prairie dogs often collect and eat food in groups so they are better protected from enemies


thx to anybody that helps! ♡︎

Answers

Answer:

B: Barnacles ride on a gray whale's back to obtain food, and the hale is not harmed.

Explanation:

I got it right on Edge.

What will happen if HI is removed from a reaction vessel containing this
reaction at equilibrium?
H2+ 12 22H1
A. The reaction will slow down.
B. There will be no effect.
C. The rate of the forward reaction will increase.
D. The rate of the backward reaction will increase.
SUBMIT

Answers

Answer:

C I think

Explanation:

There will be no effect  if HI is removed from a reaction vessel containing this reaction at equilibrium. When HI remove, concentration of all three component is change and reach a new equilibrium stage.

H2 + I2 ⇄ 2HI

So, B is correct option.

What is equilibrium?

The stage in reversible reaction at which rate of forward reaction is equal to rate of backward reaction is equal is called an equilibrium.

To learn more about equilibrium here.

https://brainly.com/question/11420477

#SPJ2

Put the following type of radiations in order of increasing energy: red, radio, UV, infrared, blue, and x-ray

Answers

Answer: The order of increasing energy is: radio < infrared < red < blue < UV < x rays

Explanation:

Electromagnetic wave is defined as the wave which is associated with both electrical and magnetic component associated with them.  

The electromagnetic radiations consist of gamma rays , X rays , Ultraviolet , Visible , Infra red , microwaves and radio waves arranged in order of decreasing frequency and increasing wavelengths. The visible region consists of violet , indigo , blue , green , yellow, orange and red lights in order of decreasing frequency or increasing wavelength

The relationship between energy  and frequency of the wave follows the equation:

[tex]E=h\times \nu[/tex]

where,

[tex]\nu[/tex] = frequency of the wave

E = energy of wave

From the above relation, it is visible that energy and frequency follow direct relation. For increase in value of frequency, energy increases and vice-versa.

Thus the order of increasing energy is: radio < infrared < red < blue < UV < x rays

A triangle has one angle that measures 81° and one that measures 37° what is the measure of a third angle

Answers

A triangle has 180 degrees. So to find the third angle, add the first and second angle. 81+37=118 degrees
Now take 180 and subtract 118
180-118=62
The third angle is 62 degrees


One of the following is not a physical property of iron.
Mark only one oval.
malleability
magnetism
rusting
color

Answers

Answer:

Rusting

Explanation:

Rusting is oxidizing iron, which would be a chemical property.

The equation below illustrates the process of
Pb2+ (aq) + 11- (aq) → Pblu (s)
a) dissolution
b) precipitation
c) decomposition

Answers

Answer:

The correct answer is - b) precipitation.

Explanation:

In the given question the lead ion in an aqueous solution is mixed with the Leutium ion in an aqueous solution and forms an insoluble or solid salt. This type of reaction is referred to as precipitation reactions in chemistry.

Such reactions are helpful in determining if a particular ion is present in the solution or not.

Pb2+ (aq) + lu- (aq) → Pblu (s)

What is the main gas in our atmosphere?

Answers

Answer:

Nitrogen

Explanation:

Answer:

Yes, its nitrogen. I wrote my answer earlier in the wrong spot.

Explanation:

The atmosphere contains many gases, most in small amounts, including some pollutants and greenhouse gases. The most abundant gas in the atmosphere is nitrogen, with oxygen second. Argon, an inert gas, is the third most abundant gas in the atmosphere.

Other Questions
9. The radius of sphere is increasing at a rate of 3cm/minute. Find the rate of change of volumewhen r=2cm *V = 12481664 32T please helppp me anyone A company finds that there is a linear relationship between the amount of money that it spends on advertising and the number of units it sells. If it spends no money on advertising it sells 350 units. For each additional $3000 spent, an additional 15 units are sold. A) If x is the amount of money that the company spends on advertising, find a formula for y, the number of units sold as a function of x. B) How many units does the firm sell if it spends $25,000 on advertising? C) How many units does the firm sell if it spends $50,000 on advertising? D) How much advertising money must be spent to sell 700 units? E) Which of the following statements correctly explains the meaning of the slope?1. If the company spends an additional $1000 on advertising, it will increases the number of units it sells by 10.2. In order to sell one more unit, the company would need to increase the amount it spends on advertising by $100.3. If the company spends an additional $0.01 on advertising, it will sell one more additional unit.4. If the company increases the amount of money it spends on advertising by $300, it will double the number of units it sells.5. None of the above. Flowes come in red, blue and purple colors. Cross 2 purple flowers what percent of the offspring will be blue Which statement explains why there are few eyewitness reports?OA) Those who saw the lights and reported them were ignored.OB) Kyle Miller was ill when he reported that he saw the lights.OC) People who report strange phenomena are usually not believed.OD) The Humphreys probably saw the lights again but said nothing. Sam finished 5/6 of his homework, John finished 3/4 of his homework, and Tom finished 10/12 of his homework. Which two students finished the same amount of homework? So if the value of the solid's surface area is equal to the volume. Find the value of xThe height of the solid is 5in and the width is 6in. X is the value of the length Find the sum Adding and Subtracting Polynomials (2n25n6)+(n23n+11)= Jane wants to pick out an outfit for the school dance. She can choose from 3 pairs of pants, 5 shirts, and 2 pairs of shoes. How many different outfits does Jane have to choose from?Group of answer choices50301060 Solve for the missing angle. Round your answers to the nearest tenth. Figures are not drawn to scale.Help me plzzzzzz!!!! Pls someone help rn!! Pls pls what is a definition of team? What is the order starting with where humans live What are several ways that humans alter the natural habitat? please help i dont know what to do Help please! thanks! How do I make a claim in my introductory paragraph? Fill in the blanks. 3NH3 How do electromagnets differ from regular magnets? Please help fast! !! Quick ! What is the area ?