A 1 molal solution of NaCl would have a lower boiling point elevation than a 1 molal solution of MgCl₂, because NaCl dissociates into fewer ions than MgCl₂, resulting in a lower can't Hoff factor.
The question asks which 1 molal solution has a higher boiling point compared to a 1 molal solution of MgCl₂. The boiling point elevation of a solution is affected by the number of solute particles in the solution, which is related to the can't Hoff factor (i), the measure of ion dissociation of a solute. Since MgCl₂, FeCl₂, CaCl₂, and BaCl₂ all dissociate into three ions (1 cation and 2 anions) when dissolved in water, their boiling point elevation would be expected to be similar given equai molal solutions. However, NaCl dissociates into two ions, thus a 1 molal solution of NaCl would have a lower boiling point elevation compared to a 1 molal solution of MgCl₂ due to lower i value.
The compound ncl3 is nitrogen trichloride, but alcl3 is simply aluminum chloride. why? check all that apply. check all that apply. the compound alcl3 is an ionic compound (metal and nonmetal), and therefore does not require prefixes\-âso alcl3 is aluminum chloride. ncl3 is a molecular compound (two or more nonmetals), and therefore in its name prefixes indicate the number of each type of atom\-âso ncl3 is nitrogen trichloride. alcl3 is a molecular compound (two or more nonmetals), and therefore in its name prefixes indicate the number of each type of atom\-âso alcl3 is aluminum chloride. the compound ncl3 is an ionic compound (metal and nonmetal), and therefore does not require prefixes\-âso ncl3 is nitrogen trichloride. none of the above.
The compound [tex]AlCl_3[/tex] is an ionic compound (metal and nonmetal) and therefore does not require prefixes so [tex]AlCl_3[/tex] is aluminum chloride.
[tex]NCl_3[/tex] is a molecular compound (two or more nonmetals), and therefore in its name prefixes indicate the number of each type of atom so
[tex]NCl_3[/tex] is nitrogen trichloride.
FURTHER EXPLANATIONBinary Ionic Compound NomenclatureIonic compounds are compounds made up of metals and nonmetals. Metals are elements that readily lose valence electrons and form positively charged ions called cations. Nonmetals are atoms that readily gain electrons and form negatively charged ions called anions.The electrostatic attraction between these oppositely charged ions pulls and holds them together forming the ionic compound.The compound is named based on the name of the cation and anion that it is made of.The cation name is simply the name of the metal element plus the word ion.The anion name is the first or first two syllables of the name of the nonmetal element plus the suffix -ide.Example: KClcation name: potassium ion
anion name: chloride
compound name: potassium chloride
Covalent (Molecular) Compound NomenclatureMolecular compounds are a group of nonmetal elements that are sharing their electrons for stability. They are named by using prefixes that correspond to their subscripts (how many atoms of the element is present in the molecule).The prefixes include:mono - 1 hexa - 6
di - 2 hepta - 7
tri - 3 octa - 8
tetra - 4 nona - 9
penta - 5 deca - 10
The prefix mono- is never written for the first element of a covalent compound but may be used for the second or succeeding elements (e.g. CO is carbon monoxide NOT monocarbon monoxide).Example: [tex]CO_2[/tex]no. of carbon atom = 1 (mono-)
no. of oxygen atom = 2 (di-)
name of the compound: carbon dioxide
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AlCl3 is an ionic compound, which means that the aluminium cation and chlorine anion make up its structure. Strong electrostatic forces hold the two elements' strong ionic connection together.
Because of this, the compound's name just needs to include the prefix aluminium chloride. However, the substance NCl3 is a molecular molecule, which means that it is made up of two non-metals, namely nitrogen and chlorine.
Prefixes are needed in the name of this element to denote the number of each kind of atom present since the link between these two elements is weaker than the ionic interaction between aluminium and chlorine. Thus, the substance is sometimes referred to as nitrogen trichloride.
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Calculate the molarity of each aqueous solution: (a) 25.5 ml of 6.25 m hcl diluted to 0.500 l with water (b) 8.25 ml of 2.00×10–2 m ki diluted to 12.0 ml with water
Final answer:
To calculate the molarity of diluted aqueous solutions of HCl and KI, we apply the dilution formula M1V1 = M2V2, producing final molarities of 0.319 M for HCl and 1.37×10⁻² M for KI.
Explanation:
The question involves calculating the molarity of two different aqueous solutions after dilution. For both parts (a) and (b), we will apply the concept that molarity (M) is the number of moles of solute per liter of solution, and that the number of moles of solute remains constant during the dilution process, allowing us to use the equation M1V1 = M2V2, where M1 and V1 are the initial molarity and volume, respectively, and M2 and V2 are the final molarity and volume, respectively.
For the solution of HCl: Given an initial volume of 25.5 mL (or 0.0255 L) and molarity of 6.25 M, diluted to a final volume of 0.500 L, the final molarity (M2) can be calculated as follows:M2 = (M1 × V1) / V2 = (6.25 M × 0.0255 L) / 0.500 L = 0.319 M.
For the solution of KI: With an initial volume of 8.25 mL (or 0.00825 L) and molarity of 2.00×10⁻² M, diluted to a final volume of 12.0 mL (or 0.012 L), the final molarity is calculated similarly: M2 = (M1 × V1) / V2 = (2.00×10⁻² M × 0.00825 L) / 0.012 L = 1.37×10⁻² M.
What is a common way to correct nearsightedness
Nearsightedness or myopia is a condition where the person can see the near objects clearly but distant objects appears blurred. This eye condition is corrected with contact lenses or prescription eyeglasses. Another approach is LASIK or corrective eye surgery. In LASIK laser is used to correct the vision.
Which of the following is an example of symbiosis?
A. A mother bear taking care of her cubs
B. A married couple who split their rent
C. A tick feeding off of its host
D. One chimp cleaning and grooming the hair of another chimp
Answer:
c
Explanation:
im doing it now and the answer above me is wrong
How many grams of acetylene are produced by adding water to 5.00 g CaC2?
Answer:
2.03125g of acetylene
Explanation:
First thing's first, we have to write out the balanced chemical equation;
CaC2(s) + 2H2O(l) → Ca(OH)2(aq) + C2H2(g)
Water is in excess, so CAC2 is our limiting reactant. i.e it determines the amount of product that would be formed.
1 mol of CaC2 produces 1 mol of C2H2
In terms of mass;
Mass = Number of moles * Molar mass
where the molar mass of the elements are;
Ca = 40g/mol
C = 12g/mol
H = 1g/mol
CaC2 = 40+ (2*12) = 64g/mol
C2H2 =( 2 * 12) + ( 2 * 1) = 26g/mol
64g (1 * 64g/mol) of CaC2 produces 26g ( 1mol * 26g/mol) of C2H2
5g would produce x?
64 = 26
5 = x
Upon solving for x we have;
x = (5 * 26) / 64
x = 2.03125g
By using a balanced chemical equation and molar conversions, we can calculate that adding water to 5.00 g of CaC2 will produce approximately 2.03 grams of acetylene.
Explanation:In order to find out how many grams of acetylene are produced by adding water to 5.00 g of CaC2, we need to start by writing a balanced chemical equation for the reaction: CaC2(s) + 2H2O(l) → C2H2(g) + Ca(OH)2(aq). From this equation, we can see that one molecule of calcium carbide reacts with two molecules of water to produce one molecule of acetylene and one molecule of calcium hydroxide.
Next, we calculate the molar mass of CaC2 which is approximately 64 g/mol. Therefore, 5.00 g of CaC2 is approximately 0.0781 moles. According to the chemical equation, one mole of CaC2 produces one mole of C2H2, so 5.00 g of CaC2 would also produce 0.0781 moles of acetylene.
Last, we convert the moles of acetylene to grams by multiplying by its molar mass (26.04 g/mol), which gives us approximately 2.03 g of acetylene. Therefore, approximately 2.03 grams of acetylene are produced by adding water to 5.00 g of CaC2.
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EASY
Elements in the same period have _____.
similar properties
the same number of protons
the same number of electron shells
the same number of electrons
Answer:
THE SAME NUMBER OF PROTONS
Explanation:
Elements in the same period or row will have the same number of electron shells. So the correct option is C.
What are electron shells?
The electron shell of an atom is the region that surrounds the atomic nucleus which contain a particular number of electrons. Each of the electron orbit allowed has been given a quantum number of n.
It can run from 1, which is for the orbit that is closest to the nucleus to infinity, which is for the orbits totally far from the nucleus. All of the orbitals that have the same value of n constitute an electronic shell.
Inside each of the atomic shells, there are also subshells. These correspond to the different rates of rotation and orientation of the orbitals and also to the directions of the spin of the electrons.
Generally, if the shell is far away from the nucleus or the value of n is higher, the number of subshells will also be higher.
Therefore the correct option is C.
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How many moles of oxygen would be needed to react with 6 moles of ethane?
The mole of oxygen needed to react with 6 moles of ethane is 1.16 mol.
What are combustion reactions?Combustion reactions are those in which the substance react with oxygen and produce heat and light.
The reaction will be
[tex]\rm 2C_2H_6 + 7O_2 = 4CO_2 + 6H_2O[/tex]
Now,
[tex]1\; mole\;of \;ethane \times \dfrac{7\;mol\;ofO_2}{6\;mol\;of\;C_2H_6} = 1.16 mol[/tex]
Thus, the moles of oxygen is 1.16 mol.
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Final answer:
To react with 6 moles of ethane, 21 moles of oxygen would be needed.
Explanation:
To determine the number of moles of oxygen needed to react with 6 moles of ethane, we need to use the balanced chemical equation for the reaction. The balanced equation for the combustion of ethane is:
C2H6 + 3.5O2 → 2CO2 + 3H2O
From the balanced equation, we can see that 1 mole of ethane reacts with 3.5 moles of oxygen. Therefore, 6 moles of ethane would require:
(6 moles ethane) * (3.5 moles O2 / 1 mole ethane) = 21 moles of oxygen
What is the single factor that classifies an element as a transition metal? Question 16 options:
A.the highest occupied orbital is aa "d" orbital
B. all orbitals are filled with electrons except the "s" orbitals
C. only the "s" orbitals are filled
D. aall "s" and "p" orbitals are filled
Answer: Option (A) is the correct answer.
Explanation:
A transition element is defined as the element which has incompletely filled d-orbital.
For example, atomic number of chromium is 24 and its electronic configuration is [tex][Ar]4s^{1}3d^{5}[/tex].
Also, sometimes the s-orbital is completely filled and sometimes it is half-filled.
Hence, we can conclude that a single factor that classifies an element as a transition metal is that the highest occupied orbital is a "d" orbital.
Very unsure on my answers for these 2 questions. I really have no idea what I'm doing. Could someone please explain? Will give medal and maybe become a fan if someone would just help me understand! Please?
1. Which of the following energy yields is likely to have come from a fission or fusion reaction?
1.0 × 10^2 kJ/mol
2.5 × 10^2 kJ/mol
1.2 × 10^3 kJ/mol
*This one??? 1.4 × 10^11 kJ/mol
2. In a nuclear reaction, a change in mass of 1.0 × 104 g occurs. What is the corresponding change in energy? Use the formula E = mc2.
9.0 × 10^3 kJ
*My best guess... 9.0 × 10^6 kJ
9.0 × 10^9 kJ
9.0 × 10^12 k
The combining of the nuclei of atoms is known as nuclear _____.
A.) fission
B.) fusion
C.) bombardment
D.) fallout
A combination of bonded atoms attached to a carbon skeleton is called
What volume of a 2.5 M stock solution of acetic acid (HC2H3O2) is required to prepare
100.0 milliliters of a 0.50 M acetic acid solution?
Use the equation
Mconcentrated × Vconcentrated = Mdilute × Vdilute.
90points given to correct answer
Answer
is: volume is 20 mL.
c₁(CH₃COOH) = 2,5 M.
c₂(CH₃COOH) = 0,5 M.
V₂(CH₃COOH) = 100 mL.
V₁(CH₃COOH) = ?
c₁(CH₃COOH) · V₁(CH₃COOH)
= c₂(CH₃COOH) · V₂(CH₃COOH).
2,5 M · V₁(CH₃COOH)
= 0,5 M · 100 mL.
V₁(CH₃COOH) = 0,5 M · 100 mL ÷ 2,5 M.
V₁(CH₃COOH) = 20 mL ÷ 1000 mL/L =0,02 L.
Answer:
20 milliliters
Explanation:
I don't cap
In which of the following is the solution concentration expressed in terms of molarity?
A. 10g of solute/ 1000g of solution
B. 10g of solute/ 1000mL of solution
C.10mL of solute/ 1L of solution
D.10 mol of solute/ 1L of solution
Molarity is a concentration unit that is expressed as the number of moles of the solute per liter of solution. Only Option D (10 mol of solute/ 1L of solution) presents the solution concentration in terms of molarity.
Explanation:In chemistry, molarity is a concentration unit that is expressed as the number of moles of the solute per liter of solution. In this context:
Option A represents a weight to weight percent concentration, not molarity.
Option B, though it seems similar to molarity, is not equivalent due to using mass (g) instead of moles for the solute.
Option C would be considered dilution, wherein the volume of a solution is increased, thus decreasing the solute's overall molarity.
Only Option D (10 mol of solite/ 1L of solution) directly aligns with the definition of molarity and represents the solution concentration in terms of molarity.
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The average strength of a hydrogen bond is approximately what percent of the average strength of a covalent bond?
a. 50 %
b. 10 %
c. 5 %
d. 100 %
Hydrogen bonds are
approximately 5% of the bond strength of covalent bonds, for example (C-C or C-H
bonds).
Hydrogen bonds strength in water is approximately 20
kJ/mol, strenght of carbon-carbon bond is approximately 350 kJ/mol
and strengh of carbon-hydrogen bond is approximately 340 kJ/mol.
20 kJ/350 kJ = 0,057 = 5,7 %.
Final answer:
The strength of a hydrogen bond is approximately 5% that of a covalent bond. The correct answer is c. 5%.
Explanation:
The average strength of a hydrogen bond is approximately 5% of the average strength of a covalent bond. Therefore, the correct answer to the question is c. 5%. Hydrogen bonds are a type of intermolecular attractive force where a hydrogen atom covalently bonded to an electronegative atom is attracted to a lone pair of electrons on a neighboring molecule. While hydrogen bonds are much stronger than other dipole-dipole interactions, they are still significantly weaker than covalent bonds, but integral for holding together structures like DNA and proteins in biology.
Which material does not melt at any temperature? wood, a mixture of different substances ethanol, a molecular compound sodium chloride, an ionic compound iron, a metallic element description?
If 25.8 grams of BaO dissolve in enough water to make a 212-gram solution, what is the percent by mass of the solution?
A. 12.2% BaO
B. 8.92% BaO
C. 10.8% BaO
D. 8.22% BaO
Please help with chem question
Based on the activity series, which metals could X represent in the reaction below? (Note: The equation is not balanced.)
X + MgSO4 —> Mg + XSO4
A) Sr
B) Al
C) Sn
D) Au
What is the formula of the compound that contains iron (ii) (fe2+) and sulfate (so42–) ions?
FeSO4 iron sulfate.
what is iron sulfate?Iron(II) sulfate or ferrous sulfate denotes a range of salts with the formula FeSO₄·xH₂O. those compounds exist most typically as the heptahydrate but several values for x are known. The hydrated form is used medically to treat iron deficiency, and additionally for business applications.
what is iron sulfate used for?Ferrous sulfate (or sulfate) is a medicine used to treat and prevent iron deficiency anemia. Iron allows the body to make healthy red blood cells, which deliver oxygen across the body. some matters such as blood loss, pregnancy, or too little iron in your diet could make your iron supply drop too low, leading to anemia
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If a hurricane destroyed an entire U.S. city, what category would it most likely be?
A)category 1 or 2
B)category A or B
C)category X or Y
D)category 4 or 5
The data in the table describes the properties of three substances. Based on the data, identify whether each substance is ionic, polar covalent, or non-polar covalent.
How many moles of co2 are produced when 5.40 mol of ethane are burned in an excess of oxygen?
When 5.40 moles of ethane are burned in excess oxygen, 10.80 moles of carbon dioxide are produced.
The balanced chemical equation for the combustion of ethane (C₂H₆) in oxygen (O₂) is:
C₂H₆ + 7/2 O₂ -> 2 CO₂ + 3 H₂O
From the balanced equation, we can see that 1 mole of ethane (C₂H₆) produces 2 moles of carbon dioxide (CO₂) during combustion. This means that the mole ratio of ethane to carbon dioxide is 1:2.
Given that 5.40 moles of ethane are burned, we can use this mole ratio to calculate the moles of carbon dioxide produced:
5.40 moles of C₂H₆ x (2 moles of CO₂ / 1 mole of C₂H₆) = 10.80 moles of CO₂
So, when 5.40 moles of ethane are burned in excess oxygen, 10.80 moles of carbon dioxide are produced.
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A substance is 89.2% carbon by mass. how much of the substance would be needed to recover 34.6 mol of pure carbon?
Answer:
The amount of substance we need to recover 34.6 mol of carbon is 465.47g
Explanation:
we want to know what mass of substance we need to recover 34.6 mol of carbon
This substance is composed of 89.2% carbon
Wmust recover 34.6 mol of carbon and we know that the molecular mass of carbon is 12g / mol this means that one mole of carbon has a mass of 12 g
We use a simple rule of three to know how many grams of carbon are in 34.6 mol
[tex]1 mol C\longrightarrow 12g\\34.6 mol C\longrightarrow x\\x=\frac{(34.6)(12)}{1}= 415.2 g[/tex]
415.2 g are 34.6 mol of carbon
As the amount of carbon we want to recover is 415.2g (34.6mol) and this amount corresponds to 89.2% of the total
To calculate the total mass we need we use a simple rule of three
[tex]89.2\%\longrightarrow 415.2 g\\100\%\longrightarrow x\\x=\frac{(100)(415.2)}{89.2}\\ x= 465.4g[/tex]
The amount of substance we need to recover 34.6 mol of carbon is 465.47g
Radioactivity in our world _____.
a. is something relatively new
b. is as old as the universe
c. was invented in 1913
d. was caused by atomic bombs
Which carbon compound is soft, slippery, a decent electricity conductor, and bonded in a way that forms planes?
coal
petroleum
graphite
Answer:
Graphite.
Explanation:
Hello,
Graphite, plumbago or black lead, is a mineral making up of carbon as its main atom. It has an aromatic-like structure that consists of rings of six carbon atoms assembled in widely spaced horizontal planes. It is extremely soft, and slippery, cleaves at low pressure. Moreover has a very low specific gravity making it a decent electricity conductor. In addition, it successfully withstands heat.
Best regards.
Which of the following is an example of a defined contribution plan?'
a) 401(k)
b) Keogh plan
c) Both a and b
401(k) and Keogh plan both are an example of a defined contribution plan and the correct option is option C.
What is defined contribution plan?A defined contribution (DC) plan is a retirement plan that's typically tax-deferred, like a 401(k) or a 403(b), in which employees contribute a fixed amount or a percentage of their paychecks to an account that is intended to fund their retirements.
In addition, the sponsor company can match a portion of employee contributions as an added benefit.
These plans place restrictions that control when and how each employee can withdraw from these accounts without penalties.
Therefore, 401(k) and Keogh plan both are an example of a defined contribution plan and the correct option is option C.
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What is the atomic mass of chlorine if 75.77% has an atomic mass of 34.97 u and 24.23% has an atomic mass of 36.97 u?
How many grams of hcl can be produced if 7.25 g of cl2 is reacted with an unlimited supply of h2?
Did you ever get the correct answer?
Final answer:
To find the mass of HCl produced, use stoichiometry based on the balanced chemical equation.
Explanation:
To find the number of grams of HCl that can be produced, we need to use the stoichiometry of the balanced chemical equation. From the equation, we can see that for every 2 moles of AlCl3, 6 moles of HCl are produced. Therefore, we can set up a proportion:
2 moles AlCl3 / 6 moles HCl = 249 g AlCl3 / x g HCl
Solving for x, we find that x = 747 g HCl. Therefore, 747 grams of HCl can be produced when 249 g of AlCl3 is reacted.
Why is a drip irrigation system more sustainable than traditional spraying methods of irrigating crops?
A. It leads to reduced river flow.
B. It causes the water table to drop.
C. It reduces pollution from runoff.
D. It decreases water quality.
Answer: C
Explanation: Just took the test.
Clouds form when water vapor in the air condenses to form liquid water or ice crystals.
a. True
b. False