Answer:Specific heat capacity at Constant volume of Nitrogen =742.32JKg.K
Explanation:
The Specific heat capacity at Constant volume of an ideal gas is given as
c =Cv / M
Cv= Constant volue of gas
M= Molar mass
But First, we determine the Constant volume, Cv which is given as
Cv = 5/2R since Nitrogen is a diatomic gas, N2 where R= 8.314Jmol.k
= 5/2 x 8.314Jmol.K
=20.785Jmol.K
Specific heat capacity at Constant volume, c
c= Cv/M
M=molar mass = 28.0 g/mol.
changing to kg/mol =28/1000= 0.028kg/mol
Therefore c =20.785Jmol.K/0.028kg/mol
=742.32JKg.K
Plzzz figure out at least the first one
Two solutions initially at 24.60°C are mixed in a coffee cup calorimeter. when a 100.0 ml volume of 0.100 m AgNO3 solution is mixed with a 100.0 ml sample of 0.200 m nacl solution, the temperature in the calorimeter rises to 25.30°C. Determine the dh for the reaction as written below. Assume that the density and heat capacity of the solutions is the same as that of water.
NaCl(aq)+AgNO3(aq) → AgCl(s)+NaNO3(aq)
a. -69 kJ
b. -35 kJ
c. -16 kJ
d. -250 kJ
Answer:
= - 59.7 kJ/mol
Explanation:
From the given information:
no of moles of AgNO3 = 100/1000 × 0.100 = 0.01 mol
no of moles of NaCl = 100/1000 × 0.200 = 0.02 mol
The total volume of the solution is:
= (100 + 100 ) mL
= 200 mL
mass of the solution = 200 × 1.00 = 200 g
Heat gained by the solution:
= mass × specific heat × temperature change in solution
= 200× 4.184 × (25.3 - 24.6)
= 585.76 J
Heat gained by calorimeter
= heat capacity × change in temperature of caiorimeter
= 15.5 × (25.3 -24.6)
= 10.85 J
Thus, total heat released = total heat gained
Q = 585.76 + 10.85 J
Q = 596.61 J
From above, it is obvious that AgNO3 is the limiting reagent
∴
ΔH_{rxn} = total heat released/ moles of AgNO3
= -596.61/0.01
= 59661 J/mol
= - 59.7 kJ/mol
Tom looks very different from his parents he has brown eyes and his parents have blue eyes is he adopted??
Answer:
no he don't have to be adopted he just different from his parents
Many first aid kits include an instant cold pack. A cold pack utilizes a chemical reaction that has a significant change in energy in order to make the pack feel cold. Explain which type of reaction, an endothermic reaction or an exothermic reaction, would be most useful for making a cold pack.
Answer:
Endothermic reaction
Explanation:
A cold pack is used as a cold compress in order to numb pain caused by minor injuries. it is useful in first aid treatment of bruises, sprains, cuts and burns in addition to the application of a bandage.
A cold pack functions by absorbing heat away from the surrounding thereby decreasing the temperature and making the surface to feel cool. This is an endothermic reaction.
In an endothermic reaction, heat is absorbed from the environment and the reaction surface feels cool. Hence, an endothermic reaction is most useful in making a cold pack because the product of the endothermic reaction will feel cool to touch making it suitable to be used as a cold pack in first aid.
A compound is 26.06 % N and73.94 % O. If the compound's molar mass is 108.0 g/mol, what is its molecular formula.
Answer:
yes
Explanation:
no jk, whats the mass?
if 2.0 mol of Zn is mixed with 3.0 mol
of HCl, which reactant will be limiting?
The following Balanced Reaction will take place:
Zn + 2HCl → ZnCl₂ + H₂
In the question, we have 2 moles of Zinc and 3 moles of HCl for this reaction
Amount of HCl required to completely react with 2 moles of Zn:
Since we need 2 moles of HCl for every mole of Zn, we will need 2(2) = 4 moles of HCl for every 2 moles of Zn
Identifying the Limiting Reagent:
But we are only given 3 moles of HCl where we need 4 moles to completely react.
So, since HCl is in less amount, it is the Limiting Reagent
How many atoms are in 2.0 moles of C2H6
Answer:
2 atoms of carbon combine with 6 atoms of hydrogen to from ethane.
What type of reaction is FeS + 2HCl àFeCl2 + H2S?
Answer: 3 4 a noodles
Explanation: just is[tex]\lim_{n \to \infty} a_n \lim_{n \to \infty} a_n \lim_{n \to \infty} a_n \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right] \sqrt{x} x^{2} x^{2}[/tex]
which climate is most likely found in a high pressure belt giving brainliest ty
Answer:
Rain forest.
Explanation: Because of how humid it is in a rain forest that humidity will bring a lot of pressure from above.
Answer:
A is the answer. Here is proof. Plz mark brainliest.
Explanation:
1. In the above reaction, the reactants are
and
Answer:
PLZZ like it tuk me to long to explan
Explanation:
The reaction between zinc and sulfur can be shown in what is called a chemical equation . In words, we could write the reaction as:
zinc + sulfur → zinc sulfide
The more convenient way to express a chemical reaction is to use the symbols and formulas of the substances involved:
Zn + S → ZnS
The substance(s) to the left of the arrow in a chemical equation are called reactants. A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction. In the equation above, the zinc and sulfur are the reactants that chemically combine to form the zinc sulfide product.
There is a standard way of writing chemical equations. The reactants are all written on the left-hand side of the equation, with the products on the right-hand side. An arrow points from the reactants to the products to indicate the direction of the reaction:
reactants → products
When appropriate, a symbol may be written above or below the arrow to indicate some special circumstance. The symbol “Δ” is often used to indicate that the reaction is to be heated.
The presence of the arrow also indicates that the reaction goes in one direction under the conditions indicated. There are reactions which can be easily reversed, but we will not take those up right now.
There are a wide variety of reactions possible: elements may form compounds (as seen in the reaction above), compounds may form elements (water will break down in the presence of an electric current to form hydrogen gas and oxygen gas) or compounds may combine, break apart, or rearrange to form new materials.
2 Draw circles around the examples below that are non-metals.
chlorine
silver
helium
carbon
iron
mercury
calcium
neon
sodium
sulfur
gold
zinc
Answer:
Chlorine
Carbon
Sulphur
Rest all are metals.
More to know -
Silver metal is use in jewellery
helium is present is atmosphere ( it is harmful for living being )
Carbon is use in wires
Iron is uses in many articles like ships , Iron nail
Calcium is use to purify water
The nucleoside adenosine exists in a protonated form with a pKa of 3.8. The percentage of the protonated form at pH 4.8 is closest to:
Answer:
Ok:
Explanation:
So, you can use the Henderson-Hasselbalch equation for this:
pH = pKa + log([tex]A^-/HA[/tex]) where A- is the conjugate base of the acid. In other words, A- is the deprotonated form and HA is the protonated.
We can solve that
1 = log([tex]A^-/HA\\[/tex]) and so 10 = [tex]A^-/HA[/tex] or 10HA = A-. For every 1 protonated form of adenosine (HA), there are 10 A-. So, the percent in the protonated form will be 1(1+10) or 1/11 which is close to 9 percent.
Nucleoside is "a structural subunit of nucleic acids, the heredity-controlling components of all living cells, consisting of a molecule of sugar linked to a nitrogen-containing organic compound".
What are nucleic acids?Nucleic acids are "naturally occurring chemical compounds that serve as the primary information-carrying molecules in cells".
What is nitrogen?Nitrogen is "an essential element for all forms of life and is the structural component of amino acids from which animal and human tissues, enzymes, and many hormones are made".
What is organic compound?Organic compound is "any of a large class of chemical compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen".
Using Henderson-Hasselbalch equation
pH = pKa + log(A⁻/HA)
where pH is the concentration of [H⁺]
pKa is the acid dissociation constant and [A⁻] and [HA] are the concentrations of conjugate base and an acid.
1 = log (A⁻/HA)
Thus, 10 = A⁻/HA
10HA = A⁻ Each protonated form of adenosine (HA) contains 10 A⁻
Hence, the percentage of the protonated form at pH 4.8 will be 1(1+10) or 1/11 which is closer to 9 percent.
To learn more about nucleoside here
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PLEASE PAANSWER NGA POOOO......
Answer:
................................................................. :3
Explanation:
Arrange the following elements in order of decreasing ionization energy: Cl, Si, P, Ar *
Answer:
Ar > Cl > P > Si.
HELP ASAP!
Very Active Metal + Water - Metal Hydroxide + ?
Which of these completes this reaction?
Oxygen
Air
Hydrogen
Metal Oxide
Answer:
The elements toward the bottom left corner of the periodic table are the metals that are the most active in the sense of being the most reactive. Lithium, sodium, and potassium all react with water, for example.
Explanation:
What is a symbol? Write with examples.
Answer:element symbol
Explanation:
An element symbol is the one or two letter sequence to at identifies an element, typically used through the periodic table
Symbols are abbreviations used in chemistry for chemical elements, functional groups and chemical compounds.
example:
H, Cl ,N , Ne etc.
What is the complete balanced equation for the reaction
between magnesium hydroxide and hydrogen chloride to
produce magnesium chloride and water is
O MgOH + HCI → MgCl + H2O.
O Mg(OH)2 + 2HCl → MgCl2 + 2H20.
O Mg(OH)2 + HCl → Mg + 2CO2 +3H20.
O Mg(OH)2 + 2HCl → MgCl2 + H2 + O2.
Answer:
[tex]mg(oh) {}^{2} + 2hcl) \\ gives \\ \: mgcl2 + 2h {}^{2}o[/tex]
[tex]option. b \: is \: the \: correct \\ \: balanced \: equation[/tex]
Which process is responsible for causing this column of rock to form?
A)crystallization
B)deposition
C)sedimentation
D)weathering
Answer:
I think it's sedimentation
To solve such this we must know the concept of chemical reaction. Therefore, the correct option is option C. Sedimentation is the process which is responsible for causing this column of rock to form.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved.
There are so many types of chemical reaction reaction like combination reaction, double displacement reaction. Among all the given processes, sedimentation is the process which is responsible for causing this column of rock to form. Weathering is erosion upper layer of soil.
Therefore, the correct option is option C.
Learn more about the chemical reactions, here:
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YOO THIS DUE IN 2 MINUTES PLS HELP!!..
Answer:
C) There are fewer particles in the balloons than were in the cylinder.
Explanation:
Hope this helps good luck!- Angel
If volatiles such as water vapor and carbon dioxide are added to a rock, what will happen to the melting temperature
Answer:
The melting temperature of a rock will decrease
Explanation:
In the case when the water vapour and the carbon dioxide is added to the rock so the rock melting temperature would be reduced as if we added the salt to an ice on a road so it reduced the temperature
Therefore according to the given situation, the last option is correct
And, the rest of the options are wrong
whoever answers my question correctly I'll give 50 points
Answer:
okii is it on your page
Explanation:
Answer:
hello
Explanation:
2.
and chemical equation
k. Molarity, normality, molality and formality
What mass of CH4 in grams, is required to react with 96.0 grams of O2?(2points)
S. A 15.6 g sample of benzene is mixed with excess nitric acid. We isolate 18.0 g of
C6H5NO2. What is the percent yield of C6H5NO2 in this reaction? (2points)
4. Calculate the volume of a 0.225 M solution of potassium hydroxide, KOH,
required to react with 0.215 g of acetic acid, CH3COOH? (2points)
5. An excess of AgNO3 reacts with 185.5 mL of an AlCl3 solution to give 0.325 g
of AgCl. What is the concentration, in moles per liter, of the AlCl3 solution?
(2 points)
6. Calculate the volume of pure water that used to dilute 100. mL of 12 M NaOH to
4.75 M. (2points)
3
2 16
&
Answer:
See explanation
Explanation:
2)CH4 + 2O2 -------> CO2 + 2H2O
96g of O2 = 96g/32g/mol = 3 moles of O2
If 1 mole of CH4 reacts with 2 moles of O2
x moles of CH4 reacts with 3 Moles of O2
x = 3/2 = 1.5 moles of CH4
Mass of CH4 = 1.5 moles * 16 = 24 g of CH4
3)C6H6 + HNO3 ---->C6H5NO2 + H2
Number of moles in 15 g of benzene = 15 g/ 78 g/mol = 0.19 moles
Number of moles of 18 g of C6H5NO2 = 18g/123 g/mol = 0.15 moles
From the reaction equation;
1 mole of C6H6 yields 1 mole of C6H5NO2
Hence 0.19 moles of C6H6 also yields 0.19 moles of C6H5NO2
% yield = actual yield/ theoretical yield * 100
actual yield = 0.15 moles
Theoretical yield = 0.19 moles
% yield = 0.15/0.19 * 100
% yield = 78.9%
4)The reaction equation is
KOH + CH3COOH ------> CH3COOK + H2O
number of moles of acetic acid reacted = 0.215g/60 g/mol = 3.58 * 10^-3 moles
Since the reaction is 1:1, 3.58 * 10^-3 moles moles of KOH is used.
But;
n = CV
n = number of moles
C = concentration of reactants
V = volume of solution
V = n/C
V= 3.58 * 10^-3 moles/0.225M = 0.016 L
5) 3AgNO3 + AlCl3 -----> Al(NO3) + 3AgCl
Number of moles in 0.325 g of AgCl = 0.325g/143 g/mol = 2.27 * 10^-3 moles
From the reaction equation;
1 mole of AlCl3 yields 3 moles of AgCl
x moles of AlCl3 yields 2.27 * 10^-3 moles of AgCl
x = 2.27 * 10^-3 moles/3
x = 7.6 * 10^-4 moles
From;
n = CV
C = n/V
C = 7.6 * 10^-4 moles * 1000/185.5
C= 4.1 * 10^-3 MolL-1
6)From;
C1V1 =C2V2
Where;
C1 = initial concentration
V1= initial volume
C2= final concentration
V2= final volume
100 * 12 = 4.75 * V2
V2 = 100 * 12/4.75
V2 = 252.6 ml
Volume of water added = 252.6 - 100 = 152.6 ml of pure water
question: Looking at the above visual of "Atmospheres of the Solar System" What are two patterns
you can find? PLEASE HELP DUE TONIGHT!
Answer:
The first and most obvious pattern I see is that all gas giants have an atmosphere mainly made up of hydrogen
The second thing I notice is that all the rocky planets have a significant amount of Nitrogen in their atmospheres except Mercury.
The third thing I notice is that all planets have one element that makes up 75% or more of its atmosphere except Mercury.
(If this is good, may I have brainliest, please? I'm kinda poor..)
Answer:
It's hard to find patterns in the solar system's atmosphere but I think above found a lot of them.
P4+ __02_ P4010
I need help ASAP
Answer:
[tex]P_4+5O_2\rightarrow P_4O_{10}[/tex]
Explanation:
Hello!
In this case, when we want to balance chemical reactions such as in this case, the idea is to equal to number of atoms of each element at each side of the equation according to the lay of conservation of mass, just as shown below:
[tex]P_4+5O_2\rightarrow P_4O_{10}[/tex]
Because we have four phosphorous and ten oxygen atoms at each side.
Best regards!
An aqueous solution contains
32.7% KCI (weight/weight %).
What is the mole fraction of KCI in
this aqueous solution?
Molar Mass
KCI: 74.55 g/mol
H2O: 18.016 g/mol
The mole fraction of KCl = 0.105
Further explanationGiven
%w/w KCl = 32.7
Required
the mole fraction of KCI
Solution
For 100 g solution : KCl = 32.7 g, H₂O = 67.3 g
mol KCl :
[tex]\tt \dfrac{32.7}{74.55~g/mol}=0.439[/tex]
mol H₂O :
[tex]\tt \dfrac{67.3}{18.016}=3.74[/tex]
total mol of solution = 0.439+3.74=4.179
mol fraction of KCl :
[tex]\tt \dfrac{0.439}{4.179}=0.105[/tex]
Answer:
32.7
Explanation:
explain why benzoic acid is insolube in water at room temperature but is soluble in 2.5M NaOH solution
Answer:
It is known generally that polar compounds are soluble in polar solvents. Based on the structure of benzoic acid, it comprises the non-polar C6H6 group and polar COOH group. Based on the structure, in benzoic acid, the nonpolar hydrocarbon outweighs and influences the polar part as nonpolar, due to which benzoic acid is not soluble in water.
On the other hand, benzoic acid produces sodium salt benzoic acid when it reacts with 2.5 M sodium hydroxide, this salt is ionic. Generally, the ionic compounds are soluble in water. Therefore, the salt of benzoic acid gets dissolved in water. Hence, benzoic acid is soluble in the solution of sodium hydroxide.
what does wave do?
a. Waves transfer matter from one place to another place.
b. Waves transfer energy
c. Waves create energy
d. Waves are all the same.
Answer:
b
Explanation:
wave transfers energy from one place to another
NH3(aq) + HNO3(aq) → NH4NO3(aq) Calculate the volume of an acid (1.5 M HNO3) needed to neutralize the 1.5 M HNO3.
Answer:
NH3(aq) + HNO3(aq) → NH4NO3(aq) Calculate the volume of an acid (1.5 M HNO3) needed to neutralize the 1.5 M HNO3.
Explanation:
courtroom
Me: If I throw sodium chloride in someone’s eye, is that against the law?
Judge: That would be assault
Me: Yes, I know its a salt but is it against the law?
There are no typos, this is a intended pun joke
Answer:
The worldly answer is 42
Explanation:
there you go
NEED HELP!! WILL NAME THE BRAINIEST!!!
are the counterfeit coins examples of mixtures, compounds, or elements?
Answer:
elementas
Explanation:
