The following statements from the given questions are correct.
There are 2 atoms of carbon in one molecule of acetic acid.
There are 4 moles of hydrogen atoms per mol of acetic acid.
If we look at the chemical formula of the acetic acid (CH3COOH) There are two carbon atoms.
The number of moles of Hydrogen is four because there are 4 hydrogen atoms present in acetic acid.
The remaining options are incorrect because the molar mass of acetic acid is 60.05 g/mol and there are 32.00 amu of oxygen per molecule of acetic acid.
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explain the difference in boiling points between water and methane in terms of intermolecular forces present
Answer: Water has a higher boiling point than methane. Water has a higher boiling point because water molecules have hydrogen bonds, which means MUCH STRONGER intermolecular forces, than methane.
Methane and water have different boiling points. Because water molecules have hydrogen bonds, which equate to much stronger intermolecular interactions than methane, water has a higher boiling point than methane.
What is the boiling point?The temperature at which a liquid's vapor pressure matches the pressure surrounding the liquid is known as the boiling point of that substance.
An O-H bond has a bigger bond dipole than a C-H bond because oxygen is more electronegative than carbon. As a result, there is a stronger force of attraction between two water molecules than between two methane molecules.
Therefore, the boiling points of water and methane are dissimilar. Water has a greater boiling point than methane because water molecules have hydrogen bonds, which translate to far stronger intermolecular interactions.
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Which of the following examples is a way to live sustainably?
Responses
Drive your car as much as possible.
Have a nice green, fertilized lawn.
Recycle and reuse materials.
Leave computer screens and light bulbs on.
The example 'recycle and reuse materials' is a way to live sustainability because it involves the use of old materials instead of obtaining new ones (Option 3).
What is recycling?The expression recycling is used to denote the reuse of material with different purposes, which involve the absence of extraction techniques that may be harmful to the environment and therefore promote sustainability.
Therefore, with this data, we can see that recycling is an excellent manner to maintain the sustainability objective in order to reduce the need to obtain more and more material from nature.
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which compounds could be represented by the empirical formula c h 2 ?
The compounds that can be represented by the empirical formula CH2 are C2H4, C3H6, and C8H16.
The empirical formula gives the smallest ratio of the total number of atoms present in a compound. It simply gives a ratio of the number of atoms that are present in a compound.
The formula that relates empirical formula with molecular formula is:
Molecular Formula = n × Empirical Formula
Where n is any integer.
Thus CH2 is the simplest ratio of C2H4, C3H6, and C8H16 and CH2 is the empirical formula of these compounds.
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A standard solution of sodium carbonate was prepared by dissolving 10.6 g of the anhydrous salt in distilled water. The solution was then transferred to a standard flask and the total volume was adjusted to the 500 mL mark.Calculate the concentration of the sodium carbonate solution in mol/L.
ANSWER
The concentration of the solution is 0.2 mol/L
EXPLANATION
Given that;
The mass of sodium carbonate dissolved is 10.6 grams
The volume of the flask is 500mL
Follow the steps below to find the concentration of the solution
Step 1; Find the number of moles of the solute using the below formula
[tex]\text{ mole = }\frac{\text{ mass}}{\text{ molar mass}}[/tex]Recall, the molar mass of sodium carbonate is 106 g/mol
[tex]\begin{gathered} \text{ mole = }\frac{\text{ 10.6}}{\text{ 106}} \\ \text{ mole = 0.1 moles} \end{gathered}[/tex]The moles of sodium carbonate is 0.1 moles
Step 2; Convert the volume to liters
Let x represents the volume of the flask in liters
[tex]\begin{gathered} \text{ 1mL }\rightarrow\text{ 0.001L} \\ \text{ 500mL }\rightarrow\text{ xL} \\ \text{ cross multiply} \\ \text{ 1mL }\times\text{ xL = 0.001L }\times\text{ 500mL} \\ \text{ Isolate xL} \\ \text{ xL = }\frac{\text{ 0.001L }\times500\cancel{mL}}{1\cancel{mL}} \\ \text{ xL = 0.001}\times\text{ 500} \\ \text{ xL = 0.5L} \end{gathered}[/tex]The volume of the flask is 0.5L
Step 3; Find the concentration of the solution
[tex]\begin{gathered} \text{ Concentration = }\frac{\text{ 0.1}}{\text{ 0.5}} \\ \text{ concentration = 0.2 mol/L} \end{gathered}[/tex]Therefore, the concentration of the solution is 0.2 mol/L
Convert 7.3x10^-3 kg to mg
7300 mg
Explanation:7.3x10^-3 kilograms = 7300 milligrams
How many moles are in 35 grams of NaCl
The 0.59 moles of NaCl are present in 35grams of NaCl.
What do you understand by moles?
Chemists employ the mole, as a very significant unit of measurement.
Given:
The given mass of NaCl = 35 gram
The molar mass of NaCl = 58.44 g/mol
By applying the mole's formula = moles = Given mass/molar mass
Moles = 35/58.44 = 0.59 moles
Hence, the answer is 0.59 moles of NaCl
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What is the concentration of a solution made by diluting 25 ml of 6. 0 m hcl to a final volume of 750 ml?.
The concentration of the solution will be 0.2 M.
Given information,
Initial Volume [V1] = 25 ml
Initial Volume in litre = 25/1000 L
= 0.025 L
Initial Concentration [M1] = 6 M
Final Volume [V2] = 750 ml
Final Volume in litre = 750/1000 L
= 0.75 L
Let final Concentration = [M2]
Using the dilution equation, that is
Initial Molarity x Initial Volume = Final Molarity x Final Volume
M1 x V1 = M2 x V2
6 x 0.025 = M2 x 0.75
0.15 = 0.75M2
∴ M2 = 0.2 M
Therefore the concentration of the solution after the dilution process is 0.2M compared to the initial 6M HCl.
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n is known as the principal quantum number. ... l is known as the orbital quantum number. ... ml is known as the magnetic quantum number. ... n specifies l specifies ml specifies ... a. the subshell - orbital shape. b. the energy and distance from the nucleus. c. the orbital orientation.
The first shell of an atom is its electron shell, or energy level.
The subshell is the second shell.
The particular orbital (or "cloud") within that subshell is the third shell.
What are Quantum Numbers?The position and energy of an electron in an atom are represented by a set of numbers known as quantum numbers.
principal quantum number
azimuthal quantum number
magnetic quantum number
The electron shell, also known as the atom's energy level, is the initial shell. The value of N ranges from 1 to the atom's outermost electron's shell.
By using the connection, the second shell, which is the subshell, determines the magnitude of the orbital angular momentum.
The third shell creates the orbital angular projection momentum along a certain axis and is the particular orbital (or "cloud") within that subshell.
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Which quantity must be determined experimentally in order to determine the bonding atomic radius of an atom?.
Only by measuring the separation between the nuclei of two contacting atoms and halving that distance can one determine the radius of an atom. The illustrations show how the environment around an atom can cause it to have a varied radius, even if it is the same atom.
How can the atomic size of an element be determined?By measuring the distance between the two atoms after two are united, we may determine the atomic size of the new molecule. The third technique for determining an element's atomic size is to create a single covalent link between two atoms and measure the space between them.
Atomic radii in the periodic table change from left to right across a row and from top to bottom along a column. Because of these two patterns, the periodic table's bottom left corner contains the biggest atoms, while the upper right corner has the smallest.
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If a measurement is 23.895 m, which digit is the uncertain number?
2
8
9
5
Answer:
5 is the uncertain number
Jam in a jar has a mass of 91grams and a volume of 65cubic centimeters. Calculate its density. Write your answer to the tenths place. gramspercubic centimeter
Taking into account the definition of density, the density of the jam in the jar is 1.4 g/cm³.
Definition of densityDensity is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.
In other words, density is a quantity that allows to measure the amount of mass in a certain volume of a substance.
The expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
density= mass÷ volume
Density of jamIn this case, you know that:
Mass= 91 gVolume= 65 cm³Replacing in the definition of density:
density= 91 g÷ 65 cm³
Solving:
density= 1.4 g/cm³
In summary, the density is 1.4 g/cm³.
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13. Practice: You and your brother are pushing a car with a dead battery with forces of 20 N and 25 N in the
same direction. What is the net force applied on the car?
Show your work:
Solution:
You and your brother are pushing a car with a dead battery with forces of 20 N and 25 N in the same direction and the net force is 45N.
Net force = 20 N + 25 N
Net force = 45 N.
What is force?Force is an influence that can change the motion of an object. A force can cause an object with mass to change its velocity, i.e., to accelerate. Force can also be described intuitively as a push or a pull. A force has both magnitude and direction, making it a vector quantity. The SI unit of force is Newton(N).
The Force has different effects:
Force can make a body that is at rest to move.It can stop a moving body or slow it down.It can accelerate the speed of a moving body.It can also change the direction of a moving body along with its shape and size.To learn more about force, refer;
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A rock dropped in a graduated cylinder raises the level of water from 30mL to 45mL the Rock has a mass of 60g. What is the density of the rock ?
Density is an intensive property as it does not depend on the quantity of the substances Whereas mass and volume are extensive property The density of rock is 1.33g/ml
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 = Mass of the rock ÷volume marked on the graduated cylinder
Substituting all the values in above formula, we get
Density = 60g÷45mL
= 1.33g/ml
Thus the density of the rock is 1.33g/ml
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Which of the following correctly matches the chemical formula with the name of the compound? Select all that apply.
a. K3NK3N, potassium nitride
b. SO2SO2, sulfur dioxide
c. Cl2OCl2O, chlorine(II) oxide
d. MgOMgO, monomagnesium monoxide
e. Fe2(SO4)3Fe2(SO4)3 (iron has variable charges), iron(III) sulfate
Every chemical formula has a name. In a perfect world, this name would describe the compound's characteristics as well as its makeup.
Chemical formula that correctly matches with the name of the compound
K3N, potassium nitride
SO2, sulfur dioxide
Fe2(SO4)3, iron(III) sulfate
These names are based on a set of IUPAC standards and are referred to as systematic names. Although every chemical has a scientific name, many compounds also have popular names.
But where do the names of chemical substances come from?
Ionic compound names:
Chemical formula known as ionic compounds have ionic bonds holding the constituent ions together. These are composed of negatively charged polyatomic ions and positively charged metal cations. To be classified as an ion, they must have a positive or negative charge, though.
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Which of the following pairs of elements would you expect to form a polar
covalent bond?
N and P
S and S
Ba and S
B and H
N and P pairs of elements would you expect to form a polar covalent bond.
What is a covalent bond ?A covalent bond is formed when two atoms exchange one or more pairs of electrons. The two nucleus are concurrently drawing these electrons to them. When the difference between both the electronegativity values of two atoms is too tiny for a transfer of electrons to actually occur to create ions, a covalent bond is formed.
How are covalent bonds represented?Covalent bonds between atoms in a Lewis structure are shown as a single line connecting the two atoms, which corresponds to the chemical symbol for the element. Diatomic molecules including hydrogen, nitrogen, fluorine, chlorine, bromine, iodine, and astatine are the principal sources of covalent bonding.
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A scientist proposes that an iron bar be divided into smaller and smaller pieces. what occurs during this process? select the words from the drop-down menus to correctly complete the explanation. eventually, the process produces an iron choose... . this is the smallest piece of the iron choose... . smaller pieces choose... the properties of iron.
A scientist proposes that an iron bar be divided into smaller and smaller pieces it is right to infer that during this process, the process produces, the smallest piece of the iron (Option A)
What is Iron?Iron has the chemical symbol Fe and the atomic number 26. It is a metal from the periodic table's first transition series and group 8. It is the most common element on Earth by mass, just ahead of oxygen, and makes up much of the Earth's outer and inner core.
Alloy steels, such as carbon steels, are made using iron plus additions such as nickel, chromium, vanadium, tungsten, and manganese. Bridges, power pylons, bicycle gears, cutting tools, and rifle barrels are all made from them. Carbon content in cast iron ranges from 3-5%. It is utilized in the manufacture of pipes, valves, and pumps.
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chemist: matter :: which pair of words has the same relationship to one another as chemist and matter have to one another? responses motor: machine motor: machine astronomer: space astronomer: space oceans: fish oceans: fish animals: zoo
All the pair of words given have the same relation as chemist has with matter.
What is matter?
Matter in chemistry, is defined as any kind of substance that has mass and occupies space that means it has volume .Matter is composed up of atoms which may or not be of same type.
Atoms are further made up of sub atomic particles which are the protons ,neutrons and the electrons .The matter can exist in various states such as solids, liquids and gases depending on the conditions of temperature and pressure.
The states of matter are inter convertible into each other by changing the parameters of temperature and pressure.
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Answer: Astronomer: Space
Explanation:
K12 2.18 Unit Test
the hydrologic cycle is the movement of ____. group of answer choices carbon carbohydrates water hydrocarbons hydrogen
The hydrologic cycle is the movement of water.
Water can recycle itself in the water cycle which is called the hydrologic cycle.
This cycle can be considered to start from the evaporation of water from the ocean's surface, making the air moist. As this moist air is lifted it cools and the water vapor condenses. It then forms clouds; in fact, clouds are made from tiny water droplets and ice crystals that are so small that they can float in the air.
The moisture in the atmosphere can also be transported around the globe until it returns to the surface as precipitation. Precipitation may take the form of rain, snow, sleet, or hail. Once the water reaches the ground, water may evaporate back into the atmosphere, or the water may penetrate the surface and become groundwater.
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which properties of a system would determine whether vacancy or interstitial diffusion is more likely?
The size of the particles decides whether vacancy or interstitial diffusion is more likely.
In vacancy diffusion, the atoms moves in a particular direction and the vacancies are filled and new vacancies are created on the places of the atoms.
While in Interstitial diffusion, the atoms moves inside the lattice of the structure of the crystals.
Interstitial diffusion is faster than vacancy diffusion because it is easier to move inside the lattice, and if the size of the atom is small, it will prefer interstitial diffusion over vacancy diffusion. So, smaller the size of the atoms, faster is the rate of interstitial diffusion.
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How did fossil fuels get there name
Answer:
Explanation:
Fossil fuels got their name because they are made from dead organisms, mostly plants that didn't decay because they were squashed under water or mud with no oxygen.
How many moles are in 28 grams of carbon dioxide CO2
Answer:
0.636 moles
Explanation:
Complete answer:
Complete answer:The molecular weight of a material is required to tell an individual how many grams there are in one mole of that chemical substance i.e. molecular weight of any substance contains 1 mole of that substance. Then 28 g of $C{{O}_{2}}$ contains = 0.636 moles of $C{{O}_{2}}$.
At the equivalence point of a strong acid-strong base titration, all of the acid and base have reacted producing water and a salt. What affects the ph at this point in the titration?.
The self-auto ionization affects the pH at the titration and is greater than 7
Strong acid and strong base completely suppress the effect of each other upon arriving at the equivalence point. The salt of strong acid and strong base neither gets hydrolyzed to furnish any mother acid or base because in this case, the acid-base equilibrium strongly favors the product. So, neither cation nor anion influences the pH of the neutralization point, and thus, it is only governed by the self-ionization of water. So, the correct option is the auto-ionization of water.It produced an alkaline that is susceptible and the pH of the equivalence factor will be higher than 7.Therefore the solution generated is just marginally alkaline, therefore the equivalence point's pH will be higher than 7.To learn more about equivalence point visit:
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how would you prepare from the stock solution of 0.5 m cuso4, 5 ml of 0.1m, 0.2m, 0.3m, and 0.4m, and 0.5m cuso4? show your calculations in your submission.
We will prepare the stock solution of 0.5 m CuSO₄ by using the formulae M1V1 = M2V2
1. Prepare 5 ml of 0.1 m
Use the formulae M1V1 = M2V2
Where M1 = 0.5 m
M2 = 0.1 m
V2 = 5 ml
V1 = ?
Put the values
0.5 × V1 = 0.1 × 5
V1 = 0.5 / 0.5
V1 = 1 ml
1 ml of 0.5 m CuSO₄ solution is diluted up to 5 ml to get 0.1 m CuSO₄ solution
1. Prepare 5 ml of 0.1 m
Use the formulae M1V1 = M2V2
Where M1 = 0.5 m
M2 = 0.1 m
V2 = 5 ml
V1 = ?
Put the values
0.5 × V1 = 0.1 × 5
V1 = 0.5 / 0.5
V1 = 1 ml
1 ml of 0.5 m CuSO₄ solution is diluted up to 5 ml to get 0.1 m CuSO₄ solution
2. Prepare 5 ml of 0.2 m
Use the formulae M1V1 = M2V2
Where M1 = 0.5 m
M2 = 0.2 m
V2 = 5 ml
V1 = ?
Put the values
0.5 × V1 = 0.2 × 5
V1 = 1 / 0.5
V1 = 2 ml
2 ml of 0.5 m CuSO₄ solution is diluted up to 5 ml to get 0.2 m CuSO₄ solution
3. Prepare 5 ml of 0.3 m
Use the formulae M1V1 = M2V2
Where M1 = 0.5 m
M2 = 0.3 m
V2 = 5 ml
V1 = ?
Put the values
0.5 × V1 = 0.3 × 5
V1 = 1.5 / 0.5
V1 = 3 ml
3 ml of 0.5 m CuSO₄ solution is diluted up to 5 ml to get 0.3 m CuSO₄ solution
4. Prepare 5 ml of 0.4 m
Use the formulae M1V1 = M2V2
Where M1 = 0.5 m
M2 = 0.4 m
V2 = 5 ml
V1 = ?
Put the values
0.5 × V1 = 0.4 × 5
V1 = 2 / 0.5
V1 = 4 ml
4 ml of 0.5 m CuSO₄ solution is diluted up to 5 ml to get 0.4 m CuSO₄ solution
5. Prepare 5 ml of 0.5 m
The stock solution is already a 0.5 m solution so no need for any addition.
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7. According to the law of conservation of mass, the mass of the Must be equal to the mass of the
Answer:
According to the law of conservation of mass, the mass of the reactants must be equal to the mass of the products
Explanation:
law of conservation of mass
The energy that is released in the hydrogen fusion reaction comes from __________.
Can someone check my answers please?? please it’s due today !!
I need help with this science question
Answer:
c Draw Ernest Rutherford atomic model
Explanation:
George is trying to move a heavy bookshelf across the classroom. He pushes on the bookshelf with a force of 57 N to the right Friction is resisting his movement with a force of 78 N. The bookshelf does not move. A friend comes to help George. The friend pushes the bookshelf in the same direction as George with a force of 25 N. What will happen to the bookshelf?
The book shelf will move to the right with a force of 4 newton when george is trying to move a heavy bookshelf across the classroom.
What is force and how the bookshelf is calculated out to move to the right with 4 N ?Force is a newtonian quantity that is it is discovered by Newton and it represents the product of mass and acceleration.Here in this question is given George pushed the bookshelf with a force of 57 N to the right.The resistive frictional force is 78 N and the book shelf did not move.The total force would be 57 + 25 = 82 N , and then substracting it by friction force will give 82N - 78 N = 4N.So the bookshelf will move to the right with a force of 4 N .To know more about friction visit:
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explain the difference in boiling points between water and methane in terms of intermolecular forces present
Answer:
Water has a much higher boiling point than methane because the hydrogen bonds in water have a much stronger intermolecular force than that of methane.
identify the following reaction as an endothermic reaction, exothermic reaction, or both endothermic and exothermic: evaporation of water from your skin
The evaporation of water from your skin is an example of an endothermic reaction because heat is lost from the body as the water evaporates from the skin.
What are exothermic and endothermic reactions?Based on the heat changes that occur in reaction, reactions can be classified into two types;
endothermic reactions, andexothermic reactionsExothermic reactions are reactions in which the heat content of the reactants is greater than the heat content of the products. Hence, heat is given out during the reaction. An example is the dissolution of acids in water.
Endothermic reactions are reactions in which the heat content of the reactants is less than the heat content of the products. Hence, heat is absorbed during the reaction. An example is the evaporation of water from the skin.
Other types of endothermic reactions are the melting of ice and thermal decomposition.
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