Answer:
2.408 moles of hydrogen are in the sample.
Explanation:
Molecular formula of acetic acid =CH3COOH
Ratio of carbon to hydrogen :2/4:1/2
Measured number of moles of carbon atoms = 1.204
Let the moles of hydrogen be = x
Number of carbon atoms in 1.204 mol = 1.204mol*Avogadro number
Number of hydrogen atoms in x mol = x*Avogadro number
As we know that ratio of carbon to hydrogen atoms is 1:2.
1/2=1.204mol* avogadro/ x* avogadro
x = 2.408 moles
2.408 moles of hydrogen are in the sample.
When 2.499 g of AX (s) dissolves in 135.3 g of water in a coffee-cup calorimeter the temperature rises from 23.6 °C to 35.2 °C. Calculate the enthalpy change (in kJ/mol) for the solution process. AX space (s )space rightwards arrow straight A to the power of plus (a q )space plus space straight X to the power of minus space (a q )Assumptions for this calculation: The specific heat of the solution is the same as that of pure water (4.18 J/gK) The density of water = 1.000 g/mL The liquid’s final volume is not changed by adding the solid The calorimeter loses only a negligible quantity of heat. The formula weight of AX = 59.1097 g/mol. Be sure you include the correct sign for the enthalpy change.
Answer:
The enthalpy change for the solution process [tex]\Delta H_{rxn}[/tex] = - 158.34 kJ/mol
Explanation:
Given that:
The mass of salt AX = 2.499 g
The mass of water = 135.3 g
The mass of the solution = ( 2.499 + 135.3 ) g = 137.799 g
The specific heat of salt solution s is known to be = 4.18 J/g° C
The change in temperature i.e. ΔT = 35.2 °C - 23.6 °C = 11.6 °C
Thus, the amount of heat raised is equal to the heat absorbed by the calorimeter.
∴
[tex]q_{reaction} = q_{solution}[/tex]
[tex]q_{reaction} = -ms_{solution} \Delta T[/tex]
[tex]q_{reaction} = -137.799 \ g \times 4.18 \dfrac{J}{g^0C}\times 11.6^0C[/tex]
[tex]q_{reaction} = - 6682 \ J[/tex]
[tex]q_{reaction} = - 6.682 \ kJ[/tex]
Recall that the mass of the salt = 2.499 g
The number of moles of the salt = [tex]2.499 \ g \times \dfrac{1 \ mol \ of \ AX}{59.1097 \ g}[/tex]
= 0.0422 mol of AX
Finally the enthalpy change, [tex]\Delta H_{rxn} = \dfrac{- 6.682 \ kJ}{ 0.0422 \ mol}[/tex]
= - 158.34 kJ/mol
The enthalpy change for the solution process [tex]\Delta H_{rxn}[/tex] = - 158.34 kJ/mol
Please calculate your BMI by taking your mass in kilograms divided by your
height in meters squared. Please help me out
Answer:
you find your bmi by dividing your weight in kg by your height in Meters then square it
this is the formula kg/m2
Explanation:
Like liquids gases have definite shape and valume true or false?
Answer:
False
Explanation:
A gas has neither a definite shape nor a definite volume.
what is not a part of the digestive system
Answer: The spleen plays multiple supporting roles in the body. It acts as a filter for blood as part of the immune system
Explanation:
Answer:
The Pancreas is an organ located in the abdomen. It is not a part of the human digestive system, although it does produce the pancreatic juices that act as enzymes to HELP in digestion. In other words, the Pancreas plays an important role in converting the food we eat into fuel for the body's cell.
7. Which of the following medications should most likely not be taken prior to
operating heavy machinery?
a. Penicillin (antibiotic)
b. Famotidine (stomach)
C. Diphenhydramine (Benadryl)
d. Hydrochlorothiazide (diuretic)
Diphenhydramine medications should be taken by person who operate heavy machinery.
What is Medications?Medications refers to drugs or substances taken into the body to relieve of pains or symptoms of diseases.
What is Diphenhydramine?Diphenhydramine is also called Benadryl and is antihistamine take to relieve symptoms of pains, allergy, hay fever, and the common cold symptoms like cough, sneezing, sore throat, cold , cattarh and so on. It is used to treat dizziness, nausea, vomiting and motion sickness. Diphenhydramine can be taken to relax the body and fall asleep.
Therefore, Diphenhydramine medications should be taken by person who operate heavy machinery because it will help relive pains and symptoms of cold which can be due to vigorous activity of operating heavy machinery.
Learn more about Diphenhydramine from the link below.
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1. What is contained in the nucleus of an atom?
A. Protons only
B. Electrons only
C. Electrons and Protons
D. Protons and Neutrons
Answer:
Your answer is
D. Protons and Neutrons
Hope you have a great day!
Answer:
Protons and neutrons
Explanation:
Let's know some
Protons are positively charged particlesNeutrons are neutral charged particlesElectrons are negatively charged particles.Mass number of a element=No of protons+No of neutrons
How many gallons of concentrated sulfuric acid (density of 1.84 g/cm3) are required to have a mass of 184.33 pounds?
Note: 1 kg = 2.204 lb, 1 gallon = 3.79 L.
After series of conversion from one unit to another, the number of gallons was found to be 12 litres
Density, Mass and Volume
Given Data
Density of Sulfuric acid = 1.84 g/cm3Mass of Sulfuric acid = 184.33 PoundsConversion from pounds to Gram
1 kg ---------2.204 lb
x kg ---------184.33 lb
x = 184.33/2.204
x = 83.634 kg
hence the mass in gram = 83.634*1000
mass in gram = 83634 g
Now let us find the volume
We know that density = mass/volume
volume = mass/density
volume = 83634/1.84
volume = 45453.26 cm^3
Convert cm^3 to litres
Volume in litres = 45453.26 /1000
Volume in litres = 45.45 Litres
Convert from Litres to Gallons
1 gallon = 3.79 L
x gallons = 45.45 L
x = 45.45/3.79
x gallons = 11.99 L
Approx = 12 Litres
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What is the name of the cycle in which plants turn carbon dioxide into oxygen that animals can breathe
A. Water Cycle
B. Nitrogen cycle
C. Carbon dioxide-oxygen cycle
D. Rock cycle
Answer:
c
Explanation:
carbon dioxide oxygen cycle is basically photosinthesis
photosinthecis is where carbon dioxiode is turned to oxygen
A UNKNOWN metal displaces alumiun from a solution but does not displace sodium. using actvity series, determine unknown metal
Explanation:
k
na→cannot displaceca
mg
al→can displacezn
fe
sn
pb
h
cu
hg
ag
pt
au
the answer is calcium or magnesium
because that metal's activity will be higher than al and
lower than Na. so that the metal will be ca or mg.
A store sell 21 piece of clothing every 45 minutes.How long will it take the store to sell 100 pieces of clothing?
Explanation:
21 piece =45 mins
100 pieces= x
on cross multiplication
21x=45×100mins
21x =4500mins
x =4500mins÷21
=214.3mins or 3.57hrs
Copper, a metal known since ancient times, exists in two stable isotopic forms, 6329Cu (69.09%) and 6529Cu (30.91%). Their atomic masses are 62.93 amu and 64.9278 amu respectively. Calculate the average atomic mass of copper.
Answer:
Wt. Avg. Atomic Weight => 63.35457 amu
Explanation:
Given Isotopic %Abundance fractional Wt Avg
At. Mass (amu) abundance contribution
Cu-63 62.93 69.09 0.6909 43.4783
Cu-65 64.9278 20.0668 0.200668 20.0668
Wt Average of all isotopes = ∑Wt Avg Contributions
= 43.4783 amu + 20.0668 amu = 63.35457 amu
Calculate the volume of the gas, in liters, if 1.35 mol
has a pressure of 1.30 atm
at a temperature of -6 ∘C?
Answer:
22.8 L
Explanation:
Step 1: Given data
Moles of the gas (n): 1.35 molPressure of the gas (P): 1.30 atmTemperature (T): -6°CIdeal gas constant (R): 0.0821 atm.L/mol.KStep 2: Convert "T" to Kelvin
We will use the following expression.
K = °C + 273.15 = -6 + 273.15 = 267 K
Step 3: Calculate the volume of the gas
We will use the ideal gas equation.
P × V = n × R × T
V = n × R × T / P
V = 1.35 mol × (0.0821 atm.L/mol.K) × 267 K / 1.30 atm
V = 22.8 L
50 POINTS WILL GIVE BRAINLYEST!!!!!!!!!
If you are holding a really hot cup of hot chocolate, the heat from the mug will transfer to your hand.
Question 6 options:
True
False
Answer:
true
Explanation:
Heat travels from the hot cocoa in the cup to your hands. No energy is transferred. Heat is transferred from your hands to the hot cocoa in the cup.
If you are holding a really hot cup of hot chocolate, the heat from the mug will transfer to your hand is a true statement.
What is the transfer of heat?Heat transfer is any or all of a variety of processes that are thought to function as mechanisms to move entropy and energy from one place to another. Common names for the specific mechanisms include convection, heat radiation, and conduction (see thermal conduction).
The heat always transfers from a hot body to a cold body. The heat transfer from hot the cup to the hands until the temperature of the hand and the cup will be the same. There are three types of transfer of heat.
Therefore, it is true that the heat from the mug will travel to your hand if you are holding an extremely hot cup of hot chocolate.
Learn more about the transfer of heat, here:
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#SPJ2
What is the mass of a neutron close to
Answer:
The free neutron has a mass of 939,565,413.3 eV/c2, or 1.674927471×10−27 kg, or 1.00866491588 u. The neutron has a mean square radius of about 0.8×10−15 m, or 0.8 fm, and it is a spin-½ fermion.
Mass: 1.67492749804(95)×10−27 kg; 939.56542052(54) MeV/c2; 1.00866491588...
Composition: 1 up quark, 2 down quarks
Electric charge: 0 e; (−2±8)×10−22 e (experimental limits)
Magnetic polarizability: 3.7(20)×10−4 fm3
An ionic compound dissolves easily in water because
a.) the ionic lattice collapses.
b.) the ions changed their composition.
c.) the ions are separated by the water molecules in the solution.
d.) the ionic lattice becomes disordered. I
Answer:
I say.... C.
Explanation:
Ionic compounds dissolve in water if the energy given off when the ions interact with water molecules compensates for the energy needed to break the ionic bonds in the solid and the energy required to separate the water molecules so that the ions can be inserted into solution.
Hope it helps!~ (Sorry if you get it wrong or I got it wrong-)
~The Confuzzeled homan
The colors of fireworks are produced by metals
Answer:
True
Explanation:
Answer:
Yes
Explanation:
They are produced by heating metal salts eg. Aluminium it is used to produce silver and white flames and sparks.
HOPE IT HELPED
How many atoms are in 3.5 L of Neon at STP? Show your work!
Answer:
This is the answer to the question 0.1734
Explanation:
3.5/20.18
=0=1734
Which two photos show electric force in action?
D A
O B.
OC
D D
Answer:
b and d show electric force in action
Explanation:
Question 25 (2 points) ✓ Saved
Consider these three compounds.
I
II
H
III
H
1
H-C-H
H-C-H
ннннн
! ! ! ! !
H-Ċ-Ċ-Ċ-Ċ-Ċ-H
II 1
Η Η Η Η Η
H H
1
1
H-C-C-C-H
HHH
H HH
1
H-C-C-C-C-H
I 1
Η Η Η Η
Which are isomers?
Answer:
May be its correct bro
Explanation:
take it easy
Answer the following questions about the mechanism for the acid-catalyzed hydration of an alkene:
a. How many transition states are there?
b. How many intermediates are there?
c. Which step in the forward direction has the smallest rate constant?
Answer:
a) there are three transition states
b) there are two intermediates; carbocation and protonated alcohol
c) The first step in the forward direction
Explanation:
The acid-catalysed hydration of alkenes proceeds via a carbocation mechanism.
Three transition states can be identified in this mechanism for the acid-catalyzed hydration of alkenes.
The three transition states are derived from the three steps in the reaction sequence:
1) Protonation of the alkene by hydronium ion
2) Addition of water to the carbocation
3) loss of a proton to yield the alcohol
The first step involves the breaking of a pi bond, hence it is a slow step hence it has the smallest rate constant. The other two steps are fast steps.
Solve the following, Report your answer with correct number of significant figures
23.27-72.058
0.0853+0.05477+0.0002
35/0.0622
3400*0.00800
(43.1+27.250)*(22.514-18.0)
The solution for the arithmetic problems are is mathematically given as
23.27-72.058=-48.79
0.0853+0.05477+0.0002=0.14
35/0.0622=562.7
3400*0.00800=27.2
(43.1+27.250)*(22.514-18.0)=317.56
What is the solution for the arithmetic problems?Question Parameter(s):
23.27-72.058
0.0853+0.05477+0.0002
35/0.0622
3400*0.00800
(43.1+27.250)*(22.514-18.0)
Generally,
23.27-72.058=-48.79
0.0853+0.05477+0.0002=0.14
35/0.0622=562.7
3400*0.00800=27.2
(43.1+27.250)*(22.514-18.0)=317.56
Read more about Arithmetic
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HELP ME OUT PLS!!!!!!
During the first half of the lunar cycle, the amount of light visible to Earth gets larger and larger. During this half of the cycle, the moon is said to be:
O eclipse
O rotation
O waning
O waxing
A 12 kilogram eagle is flying at 15 meters/sec. What is the kinetic energy (in joule) of the eagle? Use exact numbers; do not estimate.
The kinetic energy J of the eagle is mathematically given as
K.E=1350
What is the kinetic energy (in joule) of the eagle?Question Parameters:
A 12-kilogram eagle is flying at 15 meters/sec.
Generally, the equation for the kinetic energy is mathematically given as
K.E=1/2mv^2
Therefore
K.E=1/2(12)(15)^2
K.E=1350J
For more information on Energy
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Question 3 of 5
Which two characteristics describe the pair of objects experiencing greater
gravitational force?
2 kg
2 kg
S kg
5 kg
d = 1 m
d = 5 m
D A. More mass
B. Greater distance between them
C. Shorter distance between them
I D. Less mass
SUS
Answer:
A. More mass
C. Shorter distance between them
Explanation:
The two characteristics of a body experiencing greater gravitational force are that they have mass and a shorter distance between them.
This is conformity with Newton's law of universal gravitation.
The law states that "every object attracts one another with a force that is directly proportional to their masses and inversely proportional to the square of the distance between them".
This law implies that the more the mass of two bodies, the more the gravitational force of attraction. And that the shorter the square of the distance between them, the more the attraction.
Answer:
A. More Mass And
C. Shorter Distance Between Them
Explanation:
I Know This Is Already Answered But I'm Ok With It.
A 35.3g of element m is reacted with nitrogen to produce 43.5g of Compound M3N2, What is the molar mass of the element and the name of the element
Answer:
The molar mass of an element is the mass in grams of one mole (6.02 x 1023 particles) of the element.
Hope it help
Explanation:
good luck
Write the equation for the reaction of carbonic acid with hydroxide to produce hydrogen carbonate and water
Answer:
HCO3− + OH− ⇌ CO32− + H2O (fast)
Between pH values of 8 and 10, all the above equilibrium reactions are significant
Predict the precipitate produced by mixing an Al(NO3)3 solution with a KOH solution. Write the net ionic equation for the reaction.
Molecular equation:
Complete Ionic Equation:
Net Ionic Equation:
Identify spectator ions:
Based on the reactants and products,
The molecular equation of the reaction is: Al(NO3)3 + 3 KOH ---> Al(OH)3 + NaNO3 The complete ionic equation of the reaction is: Al3+ 3NO3- + 3 K+ 3OH- ---> Al(OH)3(s) + 3 Na+ 3 NO3+The net ionic equation of the reaction is:Al3+ 3OH- ---> Al(OH)3(s) The spectator ions are: Na+ and NO3+What is a precipitate?A precipitate is a solid product formed in when two solutions of salts react by double replacement.
The molecular equation of the reaction of Al(NO3)3 solution with a KOH solution is:
Al(NO3)3 + 3 KOH ---> Al(OH)3 + NaNO3
The complete ionic equation of the reaction of Al(NO3)3 solution with a KOH solution is:
Al3+ 3NO3- + 3 K+ 3OH- ---> Al(OH)3(s) + 3 Na+ 3 NO3+
The net ionic equation of the reaction of Al(NO3)3 solution with a KOH solution is:
Al3+ 3OH- ---> Al(OH)3(s) The spectator ions are: Na+ and NO3+Learn more about ionic equation at: https://brainly.com/question/25604204
The simple substances of matter are called:
molecules
elements
compounds
The correct answer is element
helppp
Balancing Equation
Answer:
Answer: C3H8 + 5O2 → 3CO2 + 4H2O.
Explanation:
The mass of a block is 12 g and the volume is 6 ml. Calculate the density of the block.
Question 2 options:
18 g/ml
72 g/ml
0.5 g/ml
2 g/ml
Answer:
According to mass and volume, block density is 2 g/ml
Explanation:
Density is a measure, usually used in physics and chemistry, that relates the mass and volume of a solid or compound.
In general terms, the density is directly proportional to the mass, and inversely proportional to the volume, so increasing the mass will also increase the density.
The formula used to calculate the density is
ρ = [tex]\frac{m}{V}[/tex]
Therefore, according to the mass and density of the block
ρ = [tex]\frac{12}{6}[/tex] = 2g/ml
Being the density of the block equal to 2 g/ml.
The other options are not possible, because the values given do not correspond to the result of the equation.