Answer:
69.09 g
Explanation:
First we calculate the mass of the sample of concentrated H₂SO₄, using the given volume and density:
Mass = density * volumeMass = 1.84 g/cm³ * 38.2 cm³ = 70.288 gThere are 70.288 grams of solution, of which 98.3% is H₂SO₄. Thus the H₂SO₄ mass is:
70.288 g * 98.3/100 = 69.09 gTaking into account the definition of density and percentage by mass, the mass of H₂SO₄ in a 38.2 cm³ sample of concentrated sulfuric acid is 69.09 grams.
Definition of densityBut first you must know the definition of density. Density 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 us to measure the amount of mass in a certain volume of a substance. Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
[tex]density=\frac{mass}{volume}[/tex]
Mass of solutionIn this case, you know that:
Density= 1.84 [tex]\frac{g}{cm^{3} }[/tex]
Volume= 38.2 cm³
Replacing in the definition of density:
[tex]1.84 \frac{g}{cm^{3} }=\frac{mass}{38.2 cm^{3} }[/tex]
Solving:
mass= 1.84 [tex]\frac{g}{cm^{3} }[/tex]×38.2 cm³
mass= 70.288 g
So, the mass of the solution is 70.288 grams.
Definition of percentage by massThe percentage by mass expresses the concentration and indicates the amount of mass of solute present in 100 grams of solution.
In other words, the percentage by mass of a component of the solution is defined as the ratio of the mass of the solute to the mass of the solution, expressed as a percentage.
The percentage by mass is calculated as the mass of the solute divided by the mass of the solution, the result of which is multiplied by 100 to give a percentage. This is:
[tex]percentage by mass=\frac{mass of solute}{mass of solution}x100[/tex]
Mass of H₂SO₄In this case, you know:
percentage by mass=98.3%
mass of solute= ?
mass of solution= 70.288 grams
Replacing in the definition of percentage by mass:
[tex]98.3=\frac{mass of solute}{70.288 grams}x100[/tex]
Solving:
[tex]\frac{98.3}{100} =\frac{mass of solute}{70.288 grams}[/tex]
[tex]0.983=\frac{mass of solute}{70.288 grams}[/tex]
0.983× 70.288 grams= mass of solute
69.09 grams= mass of solute
The mass of H₂SO₄ in a 38.2 cm³ sample of concentrated sulfuric acid is 69.09 grams.
Learn more about
density:
brainly.com/question/952755?referrer=searchResults
brainly.com/question/1462554?referrer=searchResults
percentage by mass:
brainly.com/question/18646836?referrer=searchResults
HELPPPP give me an example of thermal energy and describe what is happening at particle level.
Answer:
Thermal energy (also called heat energy) is produced when a rise in temperature causes atoms and molecules to move faster and collide with each other. The energy that comes from the temperature of the heated substance is called thermal energy.
Explanation:
will this help you
what are the answers easily!!!!
Answer:
True
True
Temperature
Explanation:
can someone explain this better and simpiler?
Response:
Sorry but I think you forgot to attach or include something, thanks for the points tho!
Other:
Brainliest? Thanks!
Long-wavelength infrared cameras detect infrared radiation with a wavelength of 1.0 x 10-5 meters. How much energy is in these waves? Talas
Answer: The energy of the infrared radiation is [tex]19.8\times 10^{-21}J[/tex]
Explanation:
The relationship between wavelength and energy of the wave follows the equation:
[tex]E=\frac{hc}{\lambda}[/tex]
E= energy
[tex]\lambda [/tex] = wavelength of the wave =[tex]1.0\times 10^{-5}m[/tex]
h = Planck's constant = [tex]6.626\times 10^{-34}Js[/tex]
c = speed of light = [tex]3\times 10^8m/s[/tex]
[tex]E=\frac{6.626\times 10^{-34}Js\times 3\times 10^8m/s}{1.0\times 10^{-5}m}[/tex]
[tex]E=19.8\times 10^{-21}J[/tex]
Thus energy of the infrared radiation is [tex]19.8\times 10^{-21}J[/tex]
How many moles of HCL are in 18 grams? (Use the molar mass to convert miles to grams. Round you answer to 2 decimal places.)
Answer:
0.49 mol HCl
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisExplanation:
Step 1: Define
18 g HCl
Step 2: Identify Conversions
Molar Mass of H - 1.01 g/mol
Molar Mass of Cl - 35.45 g/mol
Molar mass of HCl - 1.01 + 35.45 = 36.46 g/mol
Step 3: Convert
[tex]18 \ g \ HCl(\frac{1 \ mol \ HCl}{36.46 \ g \ HCl} )[/tex] = 0.493692 mol HCl
Step 4: Check
Round our answer to 2 decimal places.
0.493692 mol HCl ≈ 0.49 mol HCl
Answer:
0.49 mol
Explanation:
mol=given mass /molecular mass : = 18/36.5 =0.49In a chemical reaction, [_____] are the substances present after the reaction.
Answer:
Products
Explanation:
Help! What is the the correct number for the product of this particular reaction?
Answer: synthesis, decomposition, single-displacement, double-displacement, combustion and acid-base reactions.
Explanation:
if T1=454 K and T2=356 K atm and V1=101.85 mL. then what is V2? please help asap!!!
Answer:
opp
Explanation:
Which of the following are products of the reaction listed? Zn + 2HCI
ZnCl2 + H2
H2
НСІ
ZnCl2
Zn
Answer:
ZnCl2
H2
Explanation:
The products of the given reaction is:
ZnCl₂ and H₂
The two species are the products of the chemical combination
This reaction is a single displacement reactionBecause Zn is more reactive, it displaces hydrogen from the acidThis forms a hydrogen gasWe know this because Zn is higher in the activity series.3) What will be the molecular mass of gas,11.2l of which at NTP weight 14 gm?
Answer:
30 g/mol
Explanation:
Step 1: Given data
Volume of the gas at NTP: 11.2 LMass of the gas: 14 gStep 2: Calculate the moles corresponding to 11.2 L of gas
At normal temperature and pressure (1 atm, 293.15 K), 1 mol of a gas has a volume of 24.05 L.
11.2 L × 1 mol/24.05 L = 0.466 mol
Step 3: Calculate the molecular mass of the gas
0.466 moles of the gas weigh 14 g. The molecular mass is:
M = 14 g/0.466 mol = 30 g/mol
What is stoochiometry?
Answer:
Stoochiometry is the quantitative relation between the number of moles ( and therefore mass ) of various products and reactants in a chemical reaction.Explanation:
I hope l helped you. Please follow me. ❤❤❤What is the distance from and object’s top to its bottom?
The distance from object’s top to its bottom is Height
The distance from object’s side to side is Length
What nuclide undergoes fission to form molybdenum-103, atomic number 42, tin-131, atomic number 50, and two neutrons?
Element symbol: _______ mass number: _______
Answer:
The correct answer is Pu, 234.
Explanation:
In the given case, let us consider the reactant as X. Now the mass number (balanced) on both the sides will be,
Mass of X = Mass of Molybdenum + Mass of Tin + Mass of neutrons
M = 1 * 103 + 1 * 131 + 2 * 0
M = 234
Now the atomic number (balanced) on both the sides,
Atomic number of X = Atomic number of Molybdenum + Atomic number of Tin + Atomic number of neutrons
A = 1*42 + 1*50 + 2*1
A = 94
The atomic number 94 is for the element Plutonium, whose symbol is Pu. Thus, the reactant is 234-Pu.
A single atom with a unique number of protons
Answer:
One atom of that element like helium neon and other Noble gases
Explanation:
Answer:
Please make sure to re-write this on your own so your teacher doesn't think you cheating!Explanation:
The number of protons in the nucleus of an atom determines an element's atomic number. In other words, each element has a unique number that identifies how many protons are in one atom of that element. An example is all hydrogen atoms, and only hydrogen atoms, contain one proton and have an atomic number of 1.
According to the theory of plate tectonics, where do activities such as earthquakes and volcanic eruptions occur?
A
along plate boundaries
B
in the centers of plates
C
above the surfaces of plates
D
in the outer regions of plates
Answer:
A or C.... Any one. If i am wrong let me know!
Answer rrrrrrrrr....
Answer:
The answer is "Option b".
Explanation:
[tex]\to \text{number of moles} = \frac{\text{number of atoms}}{\text{avogadro number}}[/tex]
[tex]= \frac{7.0 \times 10^{19}}{6.0221 \times 10^{23}}\\\\= 1.16 \times 10^{-4} \ moles\\\\ =1.2 \times 10^{-4} \ moles[/tex]
[tex]\to \text{sample mass}= \text{number of moles} \times \text{molar mass}[/tex]
[tex]=1.16 \times 10^{-4}\times 58.9\\\\=0.00685 \\\\ = 6.85\ g[/tex]
An object on top of a building has a GPE of 23,048j and a mass of 39kg, What is the height of the object
Answer:
59.1 mExplanation:
The height of the object can be found by using the formula
[tex]h = \frac{p}{mg } \\ [/tex]
where
p is the potential energy
m is the mass
h is the height
g is the acceleration due to gravity which is 10 m/s²
From the question we have
[tex]h = \frac{23048}{39 \times 10} = \frac{23048}{390} \\ = 59.0974...[/tex]
We have the final answer as
59.1 mHope this helps you
What must be known for the rate constant to be calculated from the rate law?
A. The temperature at the beginning if the reaction
B. The reaction rate at known product concentrations
C. The reaction rate at known reaction concentrations
D. The activation energy the reaction must overcome
Answer:
C. The reaction rate at known reaction concentrations
Explanation:
The rate of a reaction is the measure of the speed of a chemical reaction. To find the rate constant of a reaction, the concentration of the reactants must be known.
Reaction rate is directly proportional to the concentration of the reactants. The quantitative relationship between the rate of a reaction and the concentrations of reactants is expressed as the rate law. From this we can deduce the rate constant.Answer:
C. ApE x Approved
Explanation:
Trust
A sample of gas occupies a volume of 571.5 mL at 0.944 atm and 10 oC. Determine the pressure of this sample at 1.183 L and 32 oC.
Answer:
0.491 atm
Explanation:
Initial volume V1 = 571.5 mL = 0.5715 L
Initial Pressure P1 = 0.944 atm
Initial Temperature T1 = 10 oC + 273 = 283 K (Converting to kelvin units)
Final Temperature T2 = 32 oC + 273 = 305K (Converting to kelvin units)
Final volume V2 = 1.183 L
Final Pressure P2 = ?
These parameters related by the combined gas law;
P1V1 / T1 = P2V2 / T2
Mke P2 subject of formular;
P2 = P1 V1 T2 / V2 T1
P2 = 0.944 * 0.5715 * 305 / 1.183 * 283
P2 = 0.491 atm
How many molecules are in 6.00 mol He?
HELP!!!!!
What does it mean for a gene to be active?
Answer: You should be able to find the answer on the internet
Ionic compounds can conduct electricity when dissolved in water due to the presence of free floating ions.
True or False
Answer:
True
Explanation:
Need help on 17,19,20 please.
Answer:
c, maybe d, and I think b.
Explanation:
Im sorry if wrong
In a climatological sense, dryness is a function of both annual rainfall and ________.
This a geology question.
Answer:
In a climatological sense, dryness is a function of both annual rainfall and evaporation
A 1.00 g sample ofNH4N03 is decomposed in a bomb calorimeter. The temperature increases by 6.12 oc. What is the molar heat of decomposition of NH4N0.1
This question is incomplete, the complete question is;
A 1.00 g sample of NH4NO3 is decomposedin a bomb calorimeter. The temperature increases by 6.12°C. What is the molar heat of decomposition for ammonium nitrate?
Molar mass, NH4NO3 80.0 g/mol
Calorimeter Constant 1.23 kJ/°C
Answer:
the molar heat of decomposition for ammonium nitrate is - 602.4 kJ/mol
Explanation:
Given that;
change in temperature ΔT = 6.12 °C
Calorimeter Constant C = 1.23 kJ/°C
Molar mass, NH4NO3 = 80.0 g/mol
we know that;
Heat gained by the calorimeter (Q1) = Heat lost by the decomposition of NH4NO3 (Q2)
Q1 = C × ΔT
Q1 = (1.23 kJ/K) × (6.12 K) = 7.53 kJ
Q value we get becomes negative since we are talking about reaction and not calorimeter
hence
Q1 = - 7.53 kJ
now
1 g NH4NO3 decomposed, - 7.53 kJ of heat is released
so if 80 g which is 1 mol NH4NO3 decompose, the heat will be;
(80 g/mol x -7.53 kJ) / 1 g = - 602.4 kJ/mol
Therefore the molar heat of decomposition for ammonium nitrate is - 602.4 kJ/mol
PLEASE HELP
This picture represents a model of:
Question 5 options:
Oxygen
Calcium
Boron
Neon
Answer:
The picture represents oxygen.
Explanation:
There are two notable ways you can figure this out:
1) Since there are eight protons, you can automatically know that you are looking for an element with an atomic number of 8. This is because the atomic number is the number of protons in an atom.
2) You can also note the number of electrons on the outer shell. These are called valence electrons. You can then see that the element has 6 valence electrons. Beginning with Lithium on the periodic table and count by ones going from left to right in period 2 of the periodic table until you get to 6. What element is that? It is indeed oxygen.
Answer:
Oxygen
Explanation:
Neons contain 8 protons and 10 ELECTRONS
Boron contains 5 protons an 5 electrons
calcium contains 20 electrons an 0 protons
What is the molecular formula of a component whose molar mass is 88.0 and whose percent composted is 9.1
The molecular formula : C₄H₈O₂
Further explanationMaybe a compound is 54.5% carbon, 9.1% hydrogen and 36.4% oxygen,so :
mol C :
[tex]\tt \dfrac{54.5}{12}=4.54[/tex]
mol H :
[tex]\tt \dfrac{9.1}{1}=9.1[/tex]
mol O :
[tex]\tt \dfrac{36.4}{16}=2.28[/tex]
Divide by 2.28(the smallest ratio) :
C H : O =
[tex]\tt \dfrac{4.54}{2.28}\div \dfrac{9.1}{2.28}\div \dfrac{2.28}{2.28}=2\div 4\div 1[/tex]
The empirical formula : C₂H₄O
(The empirical formula)n=molecular formula
(2.12+4.1+16)n=88
(44)n=88⇒n=2
How can you increase the gravitational potential energy (GPE) of an empty shoe box on the middle shelf of a bookcase?
Answer:
Add Items to it
Explanation:
Lol I took the test. Sorry If I'm incorrect
Answer:
add items to the box to increase its mass on the self it is on
Explanation: :p
When discussing distances between the solar system, which term do we use
A. Actual distance
B. Relative Brightness
D. Realtive distance
If its right you get brainless
I'm in 5th grade
PLEASE HELP A HOMIIE
Answer:
Its the first one. The cells are arranged for structure.
Explanation:
Animal cells do not need to maintain a shape since out bodies do it for us. Plant cells need something for structure.