A rock weighing 32.0g is placed in a graduated cylinder displacing the volume from 12.3mL to 16.8mL. What is density of the rock in g/mL?

Answers

Answer 1

The density of the rock as we have it is 7.11 g/mL.

What is the density of the object?

We know that when we talk about the density of the object we are talking about the ratio of the mass of the object to the volume of the object. In the case that we have here we know that the  rock weighing 32.0g is placed in a graduated cylinder displacing the volume from 12.3mL to 16.8mL.

Volume of the rock is the volume of the fluid that has been displaced by the rock as such we have;

Density = mass/ volume

= 32.0 g/16.8 mL - 12.3 mL

= 7.11 g/mL

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Related Questions

1. Give 5 examples of homolytic cleavage and also
5 examples of heterolytic cleavage.

2. Draw 6 isomers of the hexyl cation and for each
state the class: primary, secondary and tertiary.
3. Write out the full halogenation reaction of
ethane and give the IUPAC name of each
product.

Answers

One common example of homolytic cleavage is when water (H20) molecules split into hydrogen (H202) and oxygen (02) radicals.

One well-known example of heterolytic cleavage is the decomposition of water into hydrogen and oxygen gases.

What is Heterolytic and Homolytic cleavage ?

Cleavage of heterolytic bonds also known as heterolysis. When a bond is broken, the products experience an uneven distribution of the bonding electron pair. Usually, at least one ion is produced by heterolytic cleavage.

Homolytic bond cleavage, also known as homolysis, is the bond breaking process in which the bonding electron pair is evenly divided amongst the products. Radicals frequently result from homolytic cleavage. The chain initiation mechanism stage in the photolytic bromination of methane is an illustration of homolytic bond cleavage.

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The emf of a cell measured by means of a hydrogen electrode

against a saturated calomel electrode at 298K is 0.4188 V. If the pressure of the H2 (g)

was maintained at 1atm, calculate the pH of the unknown solution, given potential of

reference calomel electrode is 0.2415 V

Answers

Using Nernst equation, the pH of the unknown solution is 2.99

What is Nernst Equation

The pH of an unknown solution can be calculated by using the Nernst equation, which relates the cell potential (emf) to the concentrations of the species involved in the half-reaction. The Nernst equation for the hydrogen electrode is as follows:

E = E₀ + (0.05916/n) * log(H+)

Where:

E = cell potential (emf) in voltsE₀ = standard potential of the electrode (0.4188 V)n = number of electrons involved in the half-reaction (1 for H+)H+ = concentration of hydrogen ions in moles/liter (pH)

Given that the pressure of H₂(g) was maintained at 1atm, we can assume that the concentration of H⁺ is equal to the concentration of H₃O⁺ in the unknown solution.

Rearranging the equation we get:

pH = -log(H⁺) = (E - E₀) / (0.05916/1)

Substituting E = 0.4188 V and E₀ = 0.2415 V we get:

pH = (0.4188 - 0.2415) / (0.05916/1) = 2.996

Therefore, the pH of the unknown solution is 2.99.

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if 6.0 g of carbon is heated in air the mass of the products obtained could be either 22.0 of 14.0 G depending on the amount of air present what law will be in accordance with ( c=12, o=16)​

Answers

Answer: There is a law

Explanation: This law says if the thing that you throwing could be more height depend how is its volume of mass

Explain how the DNA from two different kinds of organims can be combined

Answers

The DNA from two different kinds of organisms can be combined through recombinant DNA technology.

What is Deoxyribonucleic acid (DNA)?

Deoxyribonucleic acid (DNA) is defined as the hereditary material that has the ability to transfer genetic material from a parent cell to its offspring.

The Deoxyribonucleic acid of a particular organism can be transferred to another organisms through the recombinant DNA technology.

Therefore, the concept that is used to combine the DNA of two different organisms is the recombinant DNA technology which inserts into a host organism another DNA, to produce new genetic combinations that are of value to science, medicine, agriculture, and industry.

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When is an object acceleration

Answers

Answer: A point or an object moving in a straight line is accelerated if it speeds up or slows down.

Explanation:  Motion on a circle is accelerated even if the speed is constant, because the direction is continually changing. For all other kinds of motion, both effects contribute to the acceleration.

What volume of water (H_{2}*O) in milliliters, can vaporize at 100C given 163 kJ of energy? For water, Delta H vap =40.66 kJ mol .

Answers

The volume of the water is obtained as 72 mL.

What is the volume of the water?

We know that the heat of vaporization is the heat that is required to raise convert the substance from the liquid state to the gaseous state. Now, we know that we can be able to find the energy from the use of the formula;

H = mL

H = heat that is required

m = Number of moles of the object

L = Heat of vaporization

We know from the problem that we have that;

H = 163 kJ

L = 40.66 kJ/mol

Then we would have;

Number of moles = H/L

= 163kJ/40.66 kJ/mol

=  4 moles

Mass of water = 4 moles * 18 g/mol = 72 g

Since the density of water = 1 g/mL

Volume = Density * mass

= 1 g/mL * 72 g

= 72 mL

Thus, the volume of the water that would be vaporized in the process that we have described is about a volume of 72 mL.

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1.50x10^-1 m glucose solution made by dissolving the glucose in 100.0 kg of water:

2.60x10^-2 m Na2CrO4 solution made by dissolving the Na2CrO4 in 1000.0 g of water:

1.00×10^-1 m urea solution made by dissolving the urea in 500.0 g of water:

Answers

1.50x10 ⁻¹ m glucose solution made by dissolving the glucose in 100.0 kg of water is 15 mole of glucose.

What is molarity ?

The term molarity defined as the moles of a solute per liters of a solution.  It is denoted by symbol (M).

1.50x10 ⁻¹ m glucose solution contain 1kg of water

Therefore, 100 kg of of water contain ( 1.50x10 ⁻¹ × 100)

= 15 mole of glucose

According to definition of molarity of solution

2.60x10⁻² m Na₂CrO₄ in 1 kg of water

Therefore, 2.60x10⁻² m Na₂CrO₄ in 1000.0 g of water = 2.60x10⁻² m Na₂CrO₄

1kg or 100gram of water contain 1.00×10⁻¹ m urea

Therefore, 500.0gram of water contain 1.00×10⁻¹/1000 ×500

= 0.05 mole of urea

Thus, 1.50x10 ⁻¹ m glucose solution made by dissolving the glucose in 100.0 kg of water is 15 mole of glucose.

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Which of the following identifies the first response when approaching a victim?

Responses

Immediately call 911.
Immediately call 911.

Evaluate the situation.
Evaluate the situation.

Immediately begin CPR.
Immediately begin CPR.

Ask for consent to help.

Answers

In the identities, the first response when approaching a victim is immediately calling 911. The correct option is B.

What is an emergency?

If delaying treatment could endanger your life or a portion of your body, it is an emergency. An emergency can be brought on by a bad accident or a sudden acute sickness.

Other situations include active labor and excruciating pain. No matter where you are or which hospital you visit, your health plan must cover emergency care.

Calling 911 is the best option to do when there is an emergency, and you see a victim.

Therefore, the correct option is B. Immediately call 911.

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Answer:  The correct answer is to Evaluate the situation.

Explanation:  This answer has been confirmed correct.

When you first discover someone that needs assistance, you should immediately evaluate the situation. If the person is conscious and alert, then you should ask their permission to help them. If they are not conscious or alert, you should then call 911.

What happens during plate tectonics

Answers

In plate tectonics, lithosphere which is made up of the crust and upper mantle—is broken into large rocky plates. These plates lie on top of a partially molten layer of rock called the asthenosphere.

What are plate tectonics?

Plate tectonics is a scientific theory that explains how major landforms are created as a result of Earth’s subterranean movements. The theory, which solidified in the 1960s, transformed the earth sciences by explaining many phenomena, including mountain building events, volcanoes, and earthquakes.

In plate tectonics, Earth’s outermost layer, or lithosphere—made up of the crust and upper mantle—is broken into large rocky plates. These plates lie on top of a partially molten layer of rock called the asthenosphere. Due to the convection of the asthenosphere and lithosphere, the plates move relative to each other at different rates, from two to 15 centimeters (one to six inches) per year.

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Please answer my question.

Answers

Volumetric flasks, burets and pipets are the most accurate with tolerances of less than 0.2%. To achieve these accuracies the person using the device needs to use the proper technique and the measurements need to made at the temperature for which the glassware was calibrated (usually 20 degrees C).

How many moles are in 78.3g of ammonium sulfite?

Answers

Answer:

To find the number of moles in 78.3 grams of ammonium sulfite, you would divide the mass by the molar mass of the substance. The molar mass of ammonium sulfite is (14.0067 + 14.0067 + 32.065 + 64.0638) g/mol = 124.1472 g/mol.

78.3 g / 124.1472 g/mol = 0.63 moles

Explanation:

Answer:

0,6746 moles of ammonium sulfite

Explanation:

(NH₄)₂SO₃  - ammonium sulfite [tex]\equiv \, N_2H_8SO_3[/tex]

Atomic weight of each element:

N = 14.00 * 2  = 28

H = 1.00   * 8  = 8

S = 32.065 * 1 = 32.065

O = 16 * 3 =  48

Total atomic weight = 28 + 8 + 32.065 + 48

Total atomic weight = 116,065 gr/mol

[tex]78.3\,g \,* \frac{1mol\,of\, (NH_4)_2SO_3}{116.065g \, \,of \, (NH_4)_2SO_3 } \approx 0,6746\, moles \, of \, (NH_4)_2SO_3[/tex]

The density of titanium is 4.54 g/mL. The water level in a graduated cylinder initially at 25.0 mL rises to 31.0 mL after a piece of titanium is submerged. What is the mass, in grams, of the titanium?

Answers

mass can be calculated using the formula: [tex]m=DV[/tex]

m = massD = density of a substanceV =  volume of water displaced (final amount  -  initial amount)

[tex]m=(\frac{4.54g}{1mL})(6.0mL)[/tex]

[tex]m = 27g[/tex]

Choose the 2 statements that are true of the population shown in this graph? (Selet all that apply)

There are many factors at work to control the population.

The number of individuals is increasing.

The population is not changing much over time.

The population is growing unchecked.

Answers

The two (2) statements that are true of the population shown in this graph include the following:

B. The number of individuals is increasing.

D. The population is growing unchecked.

What is a population?

In Science, a population can be defined as a set of similar items or events that comprises every member of a group and from which a researcher, scientist, or experimenter, obtains or generates data for a statistical study.

What is population size?

A population size can be defined as the number of individual (each) living organisms in a population, and it is usually denoted by N. Basically, population size is primarily associated with the number of genetic variation or genetic drift in a particular population.

Based on the graph, we can logically deduce that the number of individuals is increasing because the line models an exponent growth, which is also growing unchecked.

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list three statements for transverse waves​

Answers

Three statements for transverse waves are:

•Transverse waves are a form of traveling energy
•Transverse waves have oscillations perpendicular to the direction of energy transfer
•Transverse waves have particles that move about their fixed position

A chemist weighed out 5.4 g of aluminum. Calculate the number of moles of aluminum she weighed out.
Be sure your answer has the correct number of significant digits.
mol

Answers

The chemist weighed out 0.2 moles of aluminum.

To calculate the number of moles of aluminum, we need to use the formula:

moles = mass / molar mass

The molar mass of aluminum is 27 g/mol. Therefore, the number of moles of aluminum in 5.4 g can be calculated as:

moles = 5.4 g / 27 g/mol = 0.2 (mol)

So the chemist weighed out 0.2 moles of aluminum.

It is important to note that the number of moles should have the same number of significant digits as the mass measured.

HNO2
CH3-CH-CH3 ________ ?
|
NH-CH3
what will be the product?

Answers

Explanation: When C

6

H

5

CH₂NH

2

 reacts with HNO

2

, the product will be C

6

H

5

CH

2

OH.

A gas occupies a volume of 45.8 liters at STP. How many molecules would be in
this volume of gas?

Answers

Answer:

2.04 moles

Explanation:

1 liter = 1 [tex]dm^{3}[/tex]

and at S.T.P (standard temperature and pressure) one mole of any gas occupies 22.414 [tex]dm^{3}[/tex]

setting up mole and volume ratio

moles   :   volume

   1        :    22.414

   X       :    45.8

X = 45.8/22.414

X = 2.04 moles

6. Observe the reaction below and choose the best answer which completes the
reaction.

C-C=C + HOH ===> ?

(will you be able to determine the answer?)

Answers

Answer:

The answer to this reaction would be C-C-OH + H2.

3 Cu + 8HNO3 --> 3 Cu(NO3)2 + 2 NO + 4 H₂O In the above equation how many grams of water can be made when 9 grams of HNO3 are consumed?​

Answers

Answer:

It looks like the equation is already balanced for you, so the first step will be to convert 144.1 grams of HNO3 to moles.

Cobalt-60 has a half-life of about 5.26 years. If a sample has an initial mass of 4.48 grams and undergoes decay until it has a mass of 0.140 grams, then how many half-lives passed?
a)4 half-lifes
b) 3 half-lifes
c) 5 half-lifes ​

Answers

If a sample has an initial mass of 4.48 grams and undergoes decay until it has a mass of 0.140 grams, then option b 3 half-lifes  passed

The half-life of a substance is the amount of time it takes for half of the initial sample to decay. For cobalt-60, the half-life is 5.26 years. This means that if we start with 4.48 grams of cobalt-60, half of that (2.24 grams) will remain after 5.26 years.

The remaining 2.24 grams will then decay until half of that (1.12 grams) remains after another 5.26 years. Continuing this pattern, we can see that after 3 half-lives (15.78 years), we will be left with 0.140 grams of cobalt-60. Therefore, the sample underwent decay for 3 half-lives.

Half-life, in chemistry, is the time required for half of the original number of radioactive atoms in a sample to decay. The half-life of a radioactive substance is a measure of the stability of the nucleus of the atom.

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Platinum -186 would have how many protons and how many neutrons

Answers

Platinum (Pt) has six naturally occurring isotopes (190Pt, 192Pt, 194Pt, 195Pt, 196Pt and 198Pt). Platinum -186 would have 78 number of protons and 117 number of neutron.

What is Platinum ?

Platinum is a chemical element represented by the symbol Pt and the atomic number is 78. It is malleable, ductile, highly unreactive, precious, silverish-white transition metal. Platinum (Pt) has six naturally occurring isotopes (190Pt, 192Pt, 194Pt, 195Pt, 196Pt and 198Pt).

Platinum is classified as a transition metal. Platinum atoms have 78 electrons and 78 protons with 117 neutrons in the most abundant isotope of platinum.

Thus, Platinum -186 would have 78 number of protons and 117 number of neutron.

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Find the number of miles of sulfur in 452 g of sulfur (show work please)

Answers

The number of mole in 452 grams of sulphur is 14.125 mole

How do I determine the number of mole of sulphur?

The number of mole in a substance is defined as the ratio of mass to the molar mass of the subtance. This is illustrated below:

Mole = mass / molar mass

Applying the above formula, we can determine the number of mole in 452 grams of sulphur. Details below

Mass of sulphur = 452 grams Molar mass of sulphur = 32 g/mol Number of mole of sulphur =?

Mole = mass / molar mass

Number of mole of sulphur = 452/ 32

Number of mole of sulphur = 14.125 mole

Thus, the number of mole is 14.125 mole

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3) What mass of ethanol could burn in 100 g of oxygen? C2H5OH + 3 02 2 CO2 + 3 H2O​

Answers

The balanced equation for the combustion of ethanol (C2H5OH) in oxygen (O2) is:
C2H5OH + 3 O2 → 2 CO2 + 3 H2O

To determine the mass of ethanol that could burn in 100 g of oxygen, we need to use the stoichiometry of the equation. The ratio of ethanol to oxygen in the equation is 1:3, so for every 1 g of ethanol, 3 g of oxygen are required. So, 100 g of oxygen would be enough to burn 33.33 g of ethanol

PLS HELP I AM HAVING A PANIC ATTACK RN me I think I did it wrong and I’m so confused and sry if it’s a little blurry my back camera is ruined

Answers

You may therefore simply clean the lens with a microfiber cloth to fix your blurry backup camera.

How do I fix my blurry back up camera?You may therefore simply clean the lens with a microfiber cloth to fix your blurry backup camera.Remove any stains from the camera that can obstruct your view by trying to wipe it down with a cleaning solution.In addition, some cameras have a lens-cleansing auto option that you can use.Inappropriate shutter speed utilization is the most frequent cause of blurry photos.You may therefore simply clean the lens with a microfiber cloth to fix your blurry backup camera.Camera shake has a lower probability the faster your shutter speed is.When using a handheld camera, this is especially true.At slow shutter speeds, hand holding a camera steadily is impossible for anyone.

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Help with chemistry??

Answers

Answer:

The first image = double replacement

Second = single replacement

Third = Decomposition

Fourth = Combination

Explanation:

1. a color from each pair is being swapped and replacing each other so there is a double replacement

2. only the blue and the red are changing places so it is single replacement

3. the pair is being separated (decomposed)

4. the red and green are coming together (combined)

How many millimeters are there in 12 dekameters?

Answers

There are 12000 millimeters in 12 dekameters

Suppose a beaker of tetrahydrofuran is put inside a sealed tank containing tetrahydrofuran gas at 63. degree C and 810. torr. After ten minutes, will there be more liquid in the beaker, less liquid, or the same amount?

Answers

The pressure inside the beaker and the sealed tank are the same, so the liquid level in the beaker will remain the same.

The temperature inside the beaker and the sealed tank are also the same, so there will be no change in the amount of liquid in the beaker due to evaporation or condensation.

Therefore, after ten minutes, there will be the same amount of liquid in the beaker.

Compare the reactivity of Magnesium with the metals in Group 1 and explain the differences in their reactivity ( based on their properties and chemical structure )

Answers

Magnesium is less reactive than the elements of group 1.

What is reactivity?

Before we get into the question, it is good that we know what we mean by reactivity in chemistry. When we use the term reactivity, we are trying to look at how two or more substances can be able to combine together.

We know that the reactivity of the metals would depend on the position of the metals in the electrochemical series as well as the position of the metal  in the perioidic table of the elements.

Given that the atoms of the elements that we have in group 1 are more electro positive than magnesium, they are going to be much more reactive than the element magnesium and this is evidence by the reduction potentials of the elements that we can easily see from the standard tables.

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A cylinder with a movable piston contains 7.00 moles of helium. What is the final amount of moles in the cylinder if the volume was changed from 8.00 L to 12.7 L? (Don't forget to check that your units are correct).

30 points

Answers

For a cylinder containing 7.00 grams of helium and a moveable piston. If the capacity was adjusted from 8 l to 12.7 l, the ultimate quantity of moles inside the cylinder would be 11.110 l.

Describe a cylinder?

The three-dimensional shape of a cylinder is made up of two parallel round base connected by a curved surface. The right cylinder is formed when the circular bases' centres cross each other. Right cylinders have parts that are parallel to the planes that include the bases; otherwise, they are referred to as oblique cylinders.

A round cylinder is what?

The circular cylinder is a cylinder with circular bases that are parallel to one another. Three dimensions are involved.

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Which of the following compounds would form an acid when dissolved in water as an aqueous solution?

NaCl
NO2
H2SO3
HCl

Answers

Answer:

Explanation:

An acid is a substance that can donate protons (H+) to water when dissolved in it, resulting in an increase in the concentration of H+ ions in the solution.

When NaCl (sodium chloride) is dissolved in water, it dissociates into its individual ions, Na+ and Cl-. These ions do not donate protons to water, so NaCl does not form an acid when dissolved in water.

NO2 (nitrogen dioxide) is a neutral compound, it does not donate protons to water and does not form an acid when dissolved in water.

H2SO3 (sulfurous acid) is an acid, when dissolved in water, it donates protons to water and forms H+ ions and SO3- ions.

HCl (hydrochloric acid) is an acid, when dissolved in water it donates protons to water and forms H+ ions and Cl- ions.

So the answer is H2SO3 and HCl are the compounds that would form an acid when dissolved in water as an aqueous solution.

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