Answer:
0.04167mole
Explanation:
To convert gram to mole,
C6H12O6
C - 12
H - 1
O - 6
There are 6 moles of C, 12 mole of H and 6 mole of O
Therefore, multiply each number of mole by the mass of each element
C - 12 * 6 = 72
H - 1 * 12 = 12
O - 16 * 6 = 96
The molar mass of C6H12O6 = 72 + 12 + 96
= 180g/mol
Dividing the number of mass by the mm
= 7.50g / 180g/mol
= 0.04167 mole
Solar panels are used to harness sunlight energy. How could solar panels be used in a house?
A to collect and heat rain water
B to prevent heat from escaping the house
C to absorb heat from the roof tiles to heat water
D to absorb energy from the sun’s radiation to heat wat
Answer:
D to absorbe energy from the sun's radiation to heat wats
Final answer:
Solar panels can utilize photovoltaics to generate electricity directly, or solar thermal technology to heat water in a house, with option D being the correct usage in the context of heating water.
Explanation:
Solar panels in a house can be used in various ways to harness solar energy. One of the methods is through photovoltaics, which convert sunlight directly into electricity that can be used to power a home's appliances and lighting. Another method is solar thermal technology, which can absorb the Sun’s energy to heat water or air for domestic use. For the question at hand, the correct answer is option D: to absorb energy from the sun’s radiation to heat water. Solar panels absorb electromagnetic waves, particularly visible light and infrared radiation, which is then converted into thermal energy. This thermal energy can be used to heat water in a residential setting, contributing to the home's hot water supply or heating system, and reducing reliance on conventional energy sources.
Single and double replacement
Answer:
Explanation:
A single replacement or single displacement reaction is a reaction in which one substance replaces another.
A + BC → AC + B
The replacement of an ion in solution by a metal higher in the activity series is a special example of this reaction type.
The relative positions of the elements in the activity series provides the driving force for single displacement reactions.
A double replacement reaction is one in which there is an actual exchange of partners between reacting species. This reaction is more common between ionic substances;
AB + CD → AC + BD
Such reactions are usually driven by;
formation of precipitationformation of water and a gaseous product5. The volume of a sample of helium is 4.50 L at 20.0°C and 203.0 kPa. What will its volume be
at 10.0"C and 203.0 kPa?
The volume will be 2.25 L.
Explanation:
As per Charle's law, the volume of a gaseous system is directly proportional to the temperature provided the system is at constant pressure. Since volume of gas is directly proportional to the temperature of the gas molecules, V∝ T
So, in case there is a change in temperature with constant pressure, then there will be equal change in volume.
[tex]\frac{V_{1}}{V_{2} } = \frac{T_{1}}{T_{2} }[/tex]
Thus, here [tex]V_{1}[/tex] = 4.50 L , [tex]T_{1}[/tex]= 20 °C and [tex]P_{1}[/tex] = [tex]P_{2}[/tex] = 203 k Pa , [tex]T_{2}[/tex] = 10°C.
Since, volume and temperature is directly proportional then there will be increase in volume with increase in temperature and vice versa.
[tex]\frac{4.50}{V_{2} } = \frac{20}{10}[/tex]
[tex]V_{2} = \frac{4.50*10}{20} = 2.25 L[/tex]
So, the new volume is 2.25 L.
Which compound has atoms sharing 2 electrons?
CCl4
N2
Br2
CO2
Carbon dioxide (CO₂) is the compound where atoms share two electron pairs each, forming two double covalent bonds between carbon and oxygen atoms.
Explanation:The compound that has atoms sharing 2 electrons in a double covalent bond is carbon dioxide (CO₂). In this molecule, a carbon atom forms two double covalent bonds with two oxygen atoms. This is represented as O=C=O, indicating that each oxygen atom is sharing two electron pairs with the carbon atom. The carbon atom has four electrons in its valence shell and requires four more to become stable. Therefore, each double bond involves the sharing of two electron pairs, which makes a total of four electrons shared with each oxygen atom.
The compound that has atoms sharing 2 electrons is N2, which is nitrogen gas. Nitrogen gas consists of two nitrogen atoms that are bonded together by a triple covalent bond. Each nitrogen atom shares three electrons with the other nitrogen atom, resulting in a total of 6 shared electrons.
how many moles of iron will be produced from 6.20 moles of carbon monoxide reacting with excess iron (III) oxide (FeO3) to produce 11.6 g of iron (Fe)
0.20 moles of iron will be formed in the reaction.
Explanation:
The balanced chemical equation for the reaction between iron (iii) oxide and carbon monoxide to form Fe is to be known first.
the balanced reaction is :
Fe2O3 + 3CO⇒ 2 Fe + 3 CO2
so from the data given the number of moles of carbon monoxide can be known:
3 moles of CO reacted with Fe2O3 to form 2 moles of iron in the reaction.
Number of moles of CO is 6.20 moles
11.6 gm of iron is formed
so the number of moles of iron formed is calculated as
n = mass of iron ÷ atomic weight of iron
= 11.6 ÷ 55.84
= 0.20 moles of iron will be formed when 11.6 gram of iron is produced.
The moles of Iron produced in the chemical reaction has been 0.2 mol.
The moles of product formed and reactant consumed has been given by the stoichiometric values of the balanced chemical equation.
The given balanced chemical equation has been:
[tex]\rm 3\;CO\;+\;Fe_2O_3\;\rightarrow\;2\;Fe\;+\;3\;CO_2[/tex]
Computation for moles of Iron producedThe molar mass of Fe has been 55.85 g/mol.
The mass of Fe produced in the chemical reaction has been 11.6 g.
The moles of Fe produced has been:
[tex]\rm Moles=\dfrac{Mass}{Molar\;mass}\\\\ Moles\;Fe=\dfrac{11.6\;g}{55.85\;g/mol}\\\\ Moles\;Fe=0.20\;mol[/tex]
The moles of Iron produced in the chemical reaction has been 0.2 mol.
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the transfer of heat within a liquid or gas is
Answer: Convection
Explanation: It is a form of heat transfer occuring only on fluids such liquids and gases. In convection when fluids gains heat they become less dense and rises which implies that warmer air rises and cooler air sinks.
What would allow water to pass through granite?
Answer:
sandstone
Explanation:
allows water to pass
what is the most difficult thing in chemistry to learn?
Answer: In my opinion I think the periodic table is the hardest.
Show a correct numerical setup for calculating the
number of moles of CO2 (gram-formula mass =
44 g/mol) present in 11 grams of CO2.
Final answer:
To calculate the number of moles of CO2 present in 11 grams of CO2, divide the mass of CO2 by the molar mass of CO2.
Explanation:
To calculate the number of moles of CO2 present in 11 grams of CO2, we need to use the molar mass of CO2, which is 44 g/mol. We can set up the calculation as follows:
Number of moles = Mass of CO2 / Molar mass of CO2
Number of moles = 11 g / 44 g/mol
Number of moles = 0.25 mol
Therefore, there are 0.25 moles of CO2 present in 11 grams of CO2.
The mass of 1 mole of nitrogen is 14 grams. The mass of 1 nitrogen atom will be approximately how much in grams?
Answer:
1.16x10^-23
Explanation:
1 mole of nitrogen has 6.02x10^23 number of nitrogen molecules. each molecule has 2 nitrogen atoms
Draw the structure for 2,4,6-trimethylphenol
Answer:
Attached.
Explanation:
I'm assuming Lewis structure is fine.
Cresol or trimethylhydroquinone, commonly known as 2,4,6-trimethylphenol, is an organic molecule with the chemical formula C9H12O. Because a hydroxyl group (-OH) is attached to a benzene ring, it is classified as a phenol.
The benzene ring serves as the main structural component of 2,4,6-trimethylphenol, which also has three methyl groups (CH) bonded to the carbon atoms at the 2, 4, and 6 positions. The chemical nomenclature, which refers to the exact locations of the substituents on the ring, is influenced by these methyl groups. At position 1, the hydroxyl group is attached to the benzene ring. 2,4,6-trimethylphenol is a phenolic chemical because it contains a hydroxyl group and exhibits some of the characteristics of phenols.
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69g of sodium reacts with chlorine to produce sodium chloride. calculate the number of moles of chlorine required to react with exactly with the sodium
Answer:
3 moles of [tex]Cl^{-}[/tex] is needed for [tex]Na^{+}[/tex]to be fully consumed.
Explanation:
For the balanced equation:
[tex]Na^{+} + Cl^{-}[/tex] ⇒ [tex]NaCl[/tex]
First, find the moles of Na corresponding to the 69g used the general definition of mol:
[tex]mol Na^{+} = \frac{69 g}{23 g/mol } = 3mol[/tex]
We observe that the equation is balanced and the stoichiometric ratio between them is 1: 1.
According to this, one mole of Na will react with one mole of Cl.
3 moles of [tex]Cl^{-}[/tex] is needed for [tex]Na^{+}[/tex]to be fully consumed.
Final answer:
To react 69 g of sodium with chlorine to produce sodium chloride, 1.5 moles of chlorine gas are required, following the stoichiometry from the balanced chemical equation 2 Na(s) + Cl₂(g) → 2 NaCl(s)
Explanation:
The student is asking for the number of moles of chlorine needed to react with 69 g of sodium to produce sodium chloride, given the balanced chemical equation:
Balance the Reaction:
2 Na(s) + Cl₂(g) → 2 NaCl(s)
Calculate Moles of Sodium:
First, we need to calculate the number of moles of sodium. The molar mass of sodium (Na) is 22.99 g/mol. Therefore, the number of moles of sodium in 69g is:
moles Na = mass Na / molar mass Na = 69g / 22.99 g/mol = 3 moles (rounded to two significant figures)
Determine Moles of Chlorine:
Using stoichiometry from the balanced equation, 2 moles of sodium react with 1 mole of chlorine. Therefore, if we have 3 moles of sodium, we would need:
moles Cl₂ = moles Na / 2 = 3 moles / 2 = 1.5 moles of Cl₂
Therefore, 1.5 moles of chlorine gas are required to react with 69 g of sodium to produce sodium chloride. This stoichiometry is consistent regardless of the mass of sodium you start with, as long as you're using the correct molar mass to convert grams to moles.
If 375 grams of CO2 are placed in a vessel whose volume is 34.5 liters at a temperature of 20 degrees celsius, what will the pressure be? PLEASE, ANYONE HELP!
Answer:
the pressure is P = 5,94 atm ≈ 6 atm
Explanation:
Following the equation corresponding to the Ideal Gas Law, it is possible to find the system pressure in the silver problem.
[tex]PV = nRT[/tex]
From this equation, we find the pressure
[tex]P = \frac{nRT}{V}[/tex]
where:
P is the pressure of the gas,
V is the volume of the gas,
n is the amount of substance of gas (also known as number of moles),
R is the ideal, or universal, gas constant.
Now we find the moles of CO2
[tex]n = \frac{g}{PM}[/tex]
We have 375g of CO2 and its molecular weight is 44g/mol
[tex]nCO_{2} = \frac{375g}{44g/mol} = 8,52 mol[/tex]
Using.
R = 0,082[tex]\frac{L . atm}{K . mol}[/tex]
T = 20ºC = 293,15 K
We substitute in the equation
[tex]P = \frac{nRT}{V}\\\\ P = \frac{8,52 mol . 0,082\frac{L.atm}{K . mol} . 293,15K}{34,5 L}\\[/tex]
P = 5,94 atm ≈ 6 atm
How would you describe (in general) the Lewis Dots Diagram for a Cation
Answer:
Explanation -
A Lewis electron dot symbol is a representation of the valence electrons around an atom that uses dot around the symbol of the element. Cations are formed when atoms lose electrons represented by fewer Lewis dots.
The Lewis Dot Diagram for a cation is a representation of the electron configuration after an atom loses one or more electrons. It shows the symbol of the atom with brackets and the number of valence electrons that have been removed.
Explanation:The Lewis Dot Diagram for a cation is a representation of the electron configuration of the cation. In general, cations are formed when an atom loses one or more electrons, resulting in a positive charge. The Lewis Dot Diagram for a cation shows the symbol of the atom with brackets and the number of valence electrons that have been removed. For example, the Lewis Dot Diagram for a sodium cation (Na+) would show the symbol Na with brackets and the number 10 inside the brackets, indicating that one electron has been removed.
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The sum of all the forces acting on an object is called the
force.
A)net
B)total
C)balanced
D)unbalanced
Answer:
c
Explanation:
Answer:
A(net)
Explanation:
What is the relationship between mass, distance and gravity?
Answer:
Mass is the measure of the amount of matter in an object. We see that the gravitational force between objects increases as the masses of the objects increase. With distance, we see that the strength of gravity decreases if the distance between two objects increases.
Explanation:
The amount of gravity affecting an object depends on two things: the masses of the objects being attracted and the distance between the objects. Mass is the measure of the amount of matter in an object. ... With distance, we see that the strength of gravity decreases if the distance between two objects increases
Final answer:
Mass, distance, and gravity are interconnected in physics through Newton's law of gravitation.
Explanation:
The relationship between mass, distance, and gravity is described by Newton's law of universal gravitation. This law states that every point mass attracts every other point mass by a force acting along the line intersecting both points. This force is directly proportional to the product of the masses of the two objects and inversely proportional to the square of the distance between their centers.
Mathematically, the force of gravity (F) between two objects with masses m1 and m2 separated by a distance r is given by:
F = G * (m1 * m2) / r^2
where G is the gravitational constant, approximately equal to 6.674 × 10^-11 N m^2/kg^2.
From this equation, we can see that:
1. The force of gravity (F) is directly proportional to the product of the masses (m1 * m2). This means that if the masses of the objects increase, the force of gravity between them also increases.
2. The force of gravity (F) is inversely proportional to the square of the distance (r^2) between the centers of the objects. This means that as the distance between the objects increases, the force of gravity between them decreases rapidly.
What is the density of 96 ml of a liquid that has a mass of 90.5 g?
Answer:
Density = Mass / Volume. so, x = 90.5 g / 96 mL ... The Density would be 0.942 g/mL
The density of 96 ml of a liquid that has a mass of 90.5 g is 0.942 g/mL.
What do you mean by density ?The density of a material is the measure of how tightly it is packed together. It is expressed as mass per unit volume. Density Formula: = m/V, where is the density, m is the object's mass, and V is its volume.
A dense object is heavier than a less dense object of the same size. An object with a density less than that of water will float on it, while one with a higher density will sink. The density equation is D = M / V, which stands for density equals mass per unit volume.
Given:
Density = ?
Volume = 96 ml
Mass = 90.5 g
Density = Mass / Volume
Therefore,
x = 90.5 g / 96 mL
= 0.942 g/mL
Thus, The Density would be 0.942 g/mL
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the 4 types of chemical reactions
Answer:
decomposistion,single replacement,double replacement,and sythesis
Explanation:
nmnbmm
Question 4 (1 point)
In an endothermic reaction products are
than reactants.
in potential energy and _____ stable
Answer:
The products of an endothermic reaction are less chemically stable.
Explanation:
They required an input of energy to create so naturally they are at a higher energy state.
In an endothermic reaction, the products have higher potential energy and are less stable than the reactants.
Explanation:In an endothermic reaction, the products have higher potential energy and are less stable than the reactants. An endothermic reaction is a chemical reaction that absorbs heat from the surroundings. This means that the products of the reaction have a higher potential energy than the reactants. In other words, the reactants are in a more stable state than the products.
To understand this concept, consider a simple example: the dissociation of water into hydrogen and oxygen gases. This reaction is endothermic because it requires the input of energy to break the bonds between the hydrogen and oxygen atoms in water molecules.
As a result, the products of the reaction, hydrogen and oxygen gases, have a higher potential energy than the reactants, water molecules.
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Which is not a mineral?
A. copper
B. graphite
C. sugar
D. table salt
Answer:
sugar
Explanation:
its classified as an organic compound, not a mineral
also quizlet said so
Answer: Sugar
Explanation: Sugar classifies as an organic compound and so is not a mineral.
what is the ionic compound formula for sodium Chloride
Answer:
Ionic compound formula for Sodium chloride is NaCl
Explanation:
NaCl ---------> Na^+ + Cl^-
A sample of 2.45g aluminum oxide decomposes into 1.3g of aluminum and 1.15g of oxygen. What is the percentage composition of the compound?
Answer:
%[tex]Al = 53.1%[/tex]%
%[tex]O = 46.9[/tex]%
Explanation:
If we know the grams of a chemical compound in a specific reaction, it is possible to know the percentage of each atom that composes it.
For the Aluminum Oxide in this problem, we know its total weight and the grams of each component.
therefore we can determine the percentage ratio of its components through:
For Al
%[tex]Al = \frac{mass of Al}{mass of Aluminium oxide} . 100[/tex]%
% [tex]Al = \frac{1,3 g}{2,45 g} . 100[/tex]%
%[tex]Al = 53.1%[/tex]%
In the same way for oxygen
%[tex]O = \frac{mass of O}{mass of Aluminium oxide} . 100[/tex]%
%[tex]O = \frac{1,5 g}{2,45 g} . 100[/tex]%
%[tex]O = 46.9[/tex]%
Calculate the molarity of a solution containing 25.0 moles of ethanol (C₂H₅OH) in enough water to make 3.5 liters of solution?
Answer: 7.14mol/dm3
Explanation:
Molarity is calculated by dividing the amount of a substance in volume of the solution.
i.e Molarity = (Amount in moles/volume in liters or dm3)
Given that:
Amount of moles = 25.0 moles
Volume = 3.5 liters of solution
Recall that 1 liter = 1dm3
so, 3.5 liters = 3.5dm3
Molarity = (25.0moles/3.5dm3)
= 7.14mol/dm3
Thus, the molarity of the solution is 7.14mol/dm3
Blance NH3+Na--->NaNH2+H2
Answer:
2 NH3 + 2 Na = 2 NaNH2 + H2
Explanation:
Answer:
2NH3 + 2Na —> 2NaNH2 + H2
Explanation:
NH3 + Na —> NaNH2 + H2
The above can be balance by doing the following:
There are a total of 4 hydrogen atoms on the right and 3 atoms on the left. This can be balance by putting 2 in front of NH3 and 2 in front of NaNH2 as shown below:
2NH3 + Na —> 2NaNH2 + H2
There are 2 atoms of Na on the right and 1 atom on the left. It can be balance by putting 2 in front of Na as shown below
2NH3 + 2Na —> 2NaNH2 + H2
Now we can see that the equation is balanced as we have equal numbers of atoms of the different elements on both sides of the equation.
What is the molarity of a KF(aq) solution
containing 116 grams of KF in 1.00 liter of
solution?
Answer:
2.00 M
Explanation:
what is the molar mass of calcium?
Answer:
Molar mass of calcium is 40,078 g / mol
Explanation:
Molar mass (M) is the ratio of the mass to the mass of the substance and is expressed in grams per mole (g / mol).
The molar mass of a substance corresponds/it is equal to the relative atomic or relative molecular mass with the addition of the unit g/mol.
The relative atomic mass as well as the relative molecular mass are the basis for expressing the molar mass (M), the mass of one mole of a substance.
PLS HELP: CHEMISTRY
How many C8H18 molecules are in 0.83 mL of
C8H18, the mass of which is 0.68 g?
Answer in units of molec.
Answer:
3.59x10^21 molecules
Explanation:
1mole of a substance contains 6.02x10^23 molecules.
Therefore, 1mole of C8H18 will also contain 6.02x10^23 molecules
1mole of C8H18 = (12x8) +(18x1) = 96 + 18 = 114g.
1mole (i.e 114g) oh C8H18 contains 6.02x10^23 molecules.
Therefore, 0.68g of C8H18 will contain = (0.68 x 6.02x10^23)/114 = 3.59x10^21 molecules
To find the number of C8H18 molecules in 0.83 mL of C8H18 with a mass of 0.68 g, calculate the number of moles based on the molar mass and then multiply by Avogadro's number to get approximately 3.58 x 10^21 molecules.
To calculate the number of C8H18 molecules in 0.83 mL of C8H18 with a mass of 0.68 g, we can follow these steps:
Find the molar mass of C8H18. The molar mass of C8H18 (octane) is 114.23 g/mol.
Calculate the number of moles of C8H18 using the mass provided. Number of moles = mass / molar mass = 0.68 g / 114.23 g/mol.
Convert the number of moles to molecules using Avogadro's number (6.02 x 1023 molecules/mol).
The calculation will be as follows:
Number of moles = 0.68 g / 114.23 g/mol ≈ 0.00595 moles
Number of molecules = 0.00595 moles x 6.02 x 1023 molecules/mol ≈ 3.58 x 1021 molecules
If you have 5.00 x 10^24 molecules of water how many moles of water would you
have?
Answer:
8.31moles of H2O
Explanation:
Avogadro's hypothesis gives us an excellent understanding that 1mole of any substance contains 6.02x10^23 molecules. This means that 1mole H2O also contains 6.02x10^23 molecules.
Now, if 1 mole of H2O contains 6.02x10^23 molecules
Therefore, Xmol of H2O will contain 5.00x10^24 molecules i.e
Xmol of H2O = (5.00x10^24)/6.02x10^23 = 8.31moles of H2O
What is the mass in grams of 2.6 moles of angelic acid?
Answer:
260.34g
Explanation:
First, you need to know what angelic acid is comprised of. It is written as C₅H₈O₂.
In order to solve for the mass of 2.6 moles of angelic acid, you need the mass of 1 mole of angelic acid. This can be found by adding the masses from the periodic table, like shown below:
5 carbon atoms = (5)(12.01g) = 60.05g
8 hydrogen atoms = (8)(1.01) = 8.08g
2 oxygen atoms = (2)(16) = 32g
angelic acid = 60.05 + 8.08 + 32 = 100.13g
Then, set up a basic stoichiometric equation and solve. The units should cancel out.
[tex](\frac{2.6mol}{1} )(\frac{100.13g}{1mol} )=260.34g[/tex]
The mass in grams of 2.6 moles of angelic acid is 296.78 g.
Explanation:To find the mass in grams of 2.6 moles of angelic acid, we need to use the molar mass of the compound. The molar mass of angelic acid is the sum of the atomic masses of all the elements present in the compound. According to the chemical formula of angelic acid (C6H10O2), the atomic masses of carbon, hydrogen, and oxygen are 12.01 g/mol, 1.01 g/mol, and 16.00 g/mol respectively.
So, the molar mass of angelic acid can be calculated as:
Molar mass = (6 x atomic mass of carbon) + (10 x atomic mass of hydrogen) + (2 x atomic mass of oxygen)
Molar mass = (6 x 12.01 g/mol) + (10 x 1.01 g/mol) + (2 x 16.00 g/mol)
Molar mass = 72.06 g/mol + 10.10 g/mol + 32.00 g/mol
Molar mass = 114.16 g/mol
The mass in grams of 2.6 moles of angelic acid can be calculated using the following conversion factor:
Mass (g) = Moles x Molar mass
Mass (g) = 2.6 moles x 114.16 g/mol
Mass (g) = 296.78 g
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. A party-supply store sells a helium-gas cylinder with a volume a 0.0155 cubic meters. If the cylinder provides 1.81 cubic meters of helium for balloon inflation (at STP), what must be the pressure inside the cylinder
The pressure inside the cylinder is 8.6 × 10⁻³ atm
Explanation:
At STP, the pressure is 1 atm. As per the Boyle's law, if the temperature of a gas is kept constant then its volume and pressure are inversely proportional to each other. So P₁V₁= P₂V₂
Now we have to find the P₂ as[tex]$\frac{P1V1}{V2}[/tex]
Inserting the given values, in the above expression, P1 = 1 atm, V1 = 0.0155 m³, V2 = 1.81 atm, P2 = ?, we will get P2 as,
P₂ = [tex]$\frac{0.0155\times1}{1.81}[/tex] = 8.6 × 10⁻³ atm
So the pressure inside the cylinder is 8.6 × 10⁻³ atm