Density is an intensive property as it does not depend on the quantity of the substances Whereas mass and volume are extensive property. Therefore, the volume of solid is 9.8L.
What is density?Density tells about the compactness of the substances, how much dense is the substances in other words. Object that is more denser than water they just sink in the water.
Mathematically,
Density of solid = Mass of solid ÷volume marked on the graduated cylinder
mass of solid =24.5 g
density of solid =2.50 g/mL
substituting all the given values in the above equation, we get
2.50 g/mL= 24.5 g/ volume of solid
volume of solid= 9.8L
Therefore, the volume of solid is 9.8L.
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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.
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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Explain how the DNA from two different kinds of organims can be combined
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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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
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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The heart appears to be divided in half, with two separete sections for receiving and pumping blood. Where does each half receive blood? to where does each half pump blood?
The right side of the heart receives oxygen poor blood from the veins and pumps it to your lungs where it picks up oxygen and gets rid of carbon dioxide. The left side of the heart receives oxygen rich blood from the lungs and pumps it through arteries to the rest of the body.
What is heart?It's the muscle at the centre of your circulation system pumping blood around your body as your heart beats. This blood sends oxygen and nutrients to all parts of your body and carries away unwanted carbon dioxide and waste products.
Therefore,the heart sends blood around your body. The blood provides your body with the oxygen and nutrients it needs. It also carries away waste. Your heart is sort of like a pump or two pumps in one.
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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?
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.
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
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.To learn more about camera refer
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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
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?
Explanation: When C
6
H
5
CH₂NH
2
reacts with HNO
2
, the product will be C
6
H
5
CH
2
OH.
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?)
Answer:
The answer to this reaction would be C-C-OH + H2.
CALCULATE THE [H3O+] FOR A URINE SAMPLE, WHICH HAS A PH OF 7.5
use the formula [H3O+] = 10^-pH
plug in the pH [H3O+] = 10^-7.5
so [H3O+] = 3.162*10^-8 M
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 .
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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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)
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
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 )
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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Use the periodic table to fill in the numbers in the electron configurations shown below
Na: 1s^22s^C2p^D3s^E
C=
D=
E=
Answer: C = 2, D = 6, E = 1
Explanation:
Na is the first element in the 3s row of the s block on the periodic table, meaning that the exponent (E) will be 1.
C is 2 because, to get to Na, you need to fill the orbitals previous. To fill the 2s row, you need an exponent of 2.
D is 6 because you need to fill the 2s row of the s block.
A gas occupies a volume of 45.8 liters at STP. How many molecules would be in
this volume of gas?
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
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:
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 compounds would form an acid when dissolved in water as an aqueous solution?
NaCl
NO2
H2SO3
HCl
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.
How many millimeters are there in 12 dekameters?
What happens during plate tectonics
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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How many moles are in 78.3g of ammonium sulfite?
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]
Find the number of miles of sulfur in 452 g of sulfur (show work please)
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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Platinum -186 would have how many protons and how many neutrons
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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3) What mass of ethanol could burn in 100 g of oxygen? C2H5OH + 3 02 2 CO2 + 3 H2O
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
Using Nernst equation, the pH of the unknown solution is 2.99
What is Nernst EquationThe 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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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?
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.
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.
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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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?
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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Help with chemistry??
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)
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?
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]
PLEASE GUYS I NEED THIS ASAP
Express in moles:
a) 6.02.10²2 C₂H₂ molecules;
b) 1.80-1024 nitrogen atoms;
c) 3.01-1023 NH, molecules.
What is the molar mass of these substances?
Answer:
a)0.1moles
b)2.99moles
c)0.5moles
expressed in molar mass
a)26g/mol
b)14g/mol
c)17g/mol
Explanation:
remember
1mole=6.02×10^23
