We prepare the volume of the 8.61 M stock solution of 0.102 L, then we dilute it by adding water to 0.5 L
Further explanationGiven
5.00 × 10² mL of a 1.75 M H₂SO₄ solution
8.61 M stock solution
Required
The volume of stock solution
Solution
Molarity from 8.61 M to 1.75 M ⇒Dilution
We can use dilution formula :
[tex]\tt \boxed{\bold{M_1.V_1=M_2.V_2}}[/tex]
M₁=8.61 M
V₂=500 ml = 0.5 L
M₂=1.75 M
[tex]\tt V_1=\dfrac{M_2.V_2}{M_1}\\\\V_1=\dfrac{1.75\times 0.5}{8.61}\\\\V_1=0.102~L[/tex]
how do we calculate standard electrode potentials
Explanation:
[tex]answer[/tex]
The overall cell potential can be calculated by using the equation E0cell=E0red−E0oxid. Step 2: Solve. Before adding the two reactions together, the number of electrons lost in the oxidation must equal the number of electrons gained in the reduction. The silver half-cell reaction must be multiplied by two.
Please help me this is a big grade please
Answer:
water
Explanation:
because the others are in compounds and can not be considered as products lonely.
To determine the mass of CO2 that forms from a given mass of CaCO3, which of the following must be known? Check all that apply.
To determine the mass of CO₂, the following must be known :
the molar mass of CaCO₃ the mole ratio of CaCO₃ to CO₂ the molar mass of CO₂Further explanationReaction
Decomposition of CaCO₃
CaCO₃ ⇒ CaO + CO₂
Given the mass of CaCO₃, so to determine the mass of CO₂ :
1. Find the mol of CaCO₃ from the molar mass of CaCO₃
[tex]\tt n_{CaCO_3}=\dfrac{mass~CaCO_3}{MW~CaCO_3}[/tex]
2. Find the mole ratio of CaCO₃ : CO₂(from equation = 1 : 1)
[tex]\tt n_{CaCO_3}\div n_{CO_2}=1\div 1[/tex]
3. Find the mass of CO₂ from the molar mass of CO₂
[tex]\tt mass_{CO_2}=n_{CO_2}\times MW_{CO_2}[/tex]
Answer:
1 3 and 5
Explanation:
what were the reslt of aurangzeb's religion policy ? what measures did he takes
Answer: The religious fanaticism of Aurangzeb overshadowed his virtues. His reversal of Akbar's policy of religious toleration resulted in weakening the entire structure of the Mughal empire. It led to several conflicts and wars in different parts of the country.
Which group on the periodic table contains chemical elements that are usually brittle as solids, shiny, and able to conduct electricity under certain conditions? O A. Metals O B. Metalloids C. Representative metals D. Nonmetals
Answer:
Metals
Explanation:
which type of severe weather is related to high pressure systems?
A.Hurricane
B.Heat Wave
C.Tornado
D.Thunderstorm
Answer:
Heat waves
Explanation:
which factor causes metamorphic rock to turn into igneous rock?
A. melting and then cooling
B.weathering and erosion
C.heat and pressure
D.cementation
Please please please help please
PLZ HELP WITH THIS PROJECT FOR 8TH GRADE SCIENCE EDGENUTY plz send file
Answer:
yes I would
Explanation:
but I would like to advice you to add more info about project and be precise
A mixture of methane and oxygen gases at a total pressure of 727 mm Hg contains methane at a partial pressure of 571 mm Hg. If the gas mixture contains 3.62 grams of methane, how many grams of oxygen are present
Answer: 1.95 g of oxygen is present.
Explanation:
According to Dalton's law, the total pressure is the sum of individual pressures.
[tex]p_{total}=p_{methane}+p_{oxygen}[/tex]
Given : [tex]p_{total}[/tex] =total pressure of gases = 727 mm Hg
[tex]p_{methane}[/tex] = partial pressure of methane = 571 mm Hg
[tex]p_{oxygen}[/tex] = partial pressure of oxygen = ?
[tex]727=571+p_{oxygen}[/tex]
[tex]p_{oxygen}=156mmHg[/tex]
Also [tex]p_{oxygen}=x_{oxygen}\times p_{total}[/tex]
Given : 3.62 g of methane is present
moles of methane = [tex]\frac{\text{Given mass}}{\text {Molar mass}}=\frac{3.62g}{16g/mol}=0.226moles[/tex]
[tex]x_{oxygen}[/tex] = mole fraction of oxygen
=[tex]\frac{\text {moles of oxygen}}{\text {total moles}}=\frac{y}{y+0.226}[/tex]
[tex]156=\frac{y}{y+0.226}\times 727[/tex]
[tex]y=0.061[/tex]
mass of oxygen = [tex]moles\times {\text {Molar mass}}=0.061\times 32=1.95g[/tex]
Thus 1.95 g of oxygen is present.
When 6.040 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 18.95 grams of CO2 and 7.759 grams of H2O were produced. In a separate experiment, the molar mass of the compound was found to be 56.11 g/mol. Determine the empirical formula and the molecular formula of the hydrocarbon. Enter the elements in the order presented in the question.
Answer: The empirical formula is [tex]CH_2[/tex] and molecular formula is [tex]C_4H_8[/tex]
Explanation:
We are given:
Mass of [tex]CO_2[/tex] = 18.95 g
Mass of [tex]H_2O[/tex]= 7.759 g
Molar mass of carbon dioxide = 44 g/mol
Molar mass of water = 18 g/mol
For calculating the mass of carbon:
In 44g of carbon dioxide, 12 g of carbon is contained.
So, in 18.59 g of carbon dioxide, =[tex]\frac{12}{44}\times 18.59=5.07g[/tex] of carbon will be contained.
For calculating the mass of hydrogen:
In 18g of water, 2 g of hydrogen is contained.
So, in 7.759 g of water, =[tex]\frac{2}{18}\times 7.759=0.862g[/tex] of hydrogen will be contained.
Mass of C = 5.07 g
Mass of H = 0.862 g
Step 1 : convert given masses into moles.
Moles of C =[tex] \frac{\text{ given mass of C}}{\text{ molar mass of C}}= \frac{5.07g}{12g/mole}=0.422moles[/tex]
Moles of H=[tex]\frac{\text{ given mass of H}}{\text{ molar mass of H}}= \frac{0.862g}{1g/mole}=0.862moles[/tex]
Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.
For C =[tex]\frac{0.422}{0.422}=1[/tex]
For H =[tex]\frac{0.862}{0.422}=2[/tex]
The ratio of C : H = 1: 2
Hence the empirical formula is [tex]CH_2[/tex].
The empirical weight of [tex]CH_2[/tex] = 1(12)+2(1)= 14 g.
The molecular weight = 56.1 g/mole
Now we have to calculate the molecular formula.
[tex]n=\frac{\text{Molecular weight }}{\text{Equivalent weight}}=\frac{56.1}{14}=4[/tex]
The molecular formula will be=[tex]4\times CH_2=C_4H_8[/tex]
Cindy is studying how the light absorption of construction paper varies with the color of the paper.
She decides to conduct her experiment in a room that is completely closed to sunlight. She provides a single light source—a florescent light bulb and places it 1.0 meters above each sheet of construction paper for 20.0 minutes.
If Cindy wants to measure the relative absorption of each sheet of construction paper, which of the following tools would be the most useful?
A) A temperature probe
B) A hand lens
C) A light sensor
D) A prism
Answer: I think that is C, a light sensor but im not sure
Explanation:
Answer:
temperature probe
Explanation:
For the chemical reaction:
N2 (g)
+
H2(g)=
NH3 (g)
Calculate the volume of NH; that will form from 200 dm cubed of N2 at STP. (N = 14; H - 1)
[At STP. 1 mole of any gas occupies volume of 22 A dm cubed
Answer:
Volume of ammonia produced = 398.7 dm³
Explanation:
Given data:
Volume of N₂ = 200 dm³
Pressure and temperature = standard
Volume of ammonia produced = ?
Solution:
Chemical equation:
N₂ + 3H₂ → 2NH₃
Number of moles of N₂:
PV = nRT
1 atm× 200 L = n× 0.0821 atm.L/mol.K × 273 K
n = 200 atm.L /22.41 atm.L/mol
n = 8.9 mol
Now we will compare the moles of ammonia and nitrogen.
N₂ : NH₃
1 : 2
8.9 : 2/1×8.9 = 17.8 mol
Volume of ammonia:
1 mole of any gas occupy 22.4 dm³ volume
17.8 mol ×22.4 dm³/1 mol = 398.7 dm³
Make a He atom with a mass of 4. How many protons did you put in the nucleus?
Make a Li atom with a mass number of 7. How many electrons did you place in the outermost orbital
(ring)?
Make a N atom with a mass number of 14. How many neutrons are in the nucleus?
Make a B atom with a mass number of 11. How many electrons did you put in the second orbital (ring)?
Answer:
This question appear incomplete
Explanation:
This question appear incomplete. However, let's answer the resulting questions. Firstly, let's define mass number since each of the "problems" refers to mass number. Mass number is the total number of protons and neutrons in the nucleus of an atom. It should also be noted that number of protons in any given neutral atom is the same with the number of electrons of such an atom.
1) Make a He atom with a mass of 4. How many protons did you put in the nucleus?
Answer: Helium (He) atom (having a mass number of 4) has an atomic number of 2. Atomic number is the number of protons and thus 2 protons would be in the nucleus of the Helium atom.
2) Make a Li atom with a mass number of 7. How many electrons did you place in the outermost orbital (ring)?
Answer: Lithium (Li) atom (having a mass number of 7) has an atomic number of 3. Remember that atomic number (number of protons) equals number of electrons in a neutral atom. Thus, lithium atom would have 3 electrons; 2 electrons in it's first shell and 1 electron in it's outermost shell
3) Make a N atom with a mass number of 14. How many neutrons are in the nucleus?
Answer: Nitrogen (N) atom (with a mass number of 14) has an atomic number of 7. Since atomic number is the number of protons and mass number is the number of protons + neutrons. Then, number of neutrons would equal mass number minus atomic number:
number of neutrons = 14 - 7
number of neutrons = 7 neutrons
4) Make a B atom with a mass number of 11. How many electrons did you put in the second orbital (ring)?
Answer: An atom (Boron) with mass number of 11 has an atomic number of 5. Since atomic number eventually equals number of electrons, then Boron has 5 electrons; 2 electrons in it's first shell and 3 electrons in it's second orbital/ring.
Answer:
2 protons in the He nucleus,
1 electron in the outermost,
7 neutrons in the nucleus
3 electrons in the 2nd orbital ring
Explanation:
I just did it on E2020
why did my dad hasn't come back with the milk for 10 years
Answer:
Milk's heavy
Explanation:
briefly explain formality in solution.
Answer:
Both molarity and formality express concentration as moles of solute per liter of solution. Formality is a substance's total concentration in solution without regard to its specific chemical form. ... The formality of a solution is defined as the number of formula mass of any solute dissolved in 1 litre of solution.
Fill in the coefficients that will balance the following reaction:
(Note: Use 1 as coefficient where appropriate.)
NaCl+
FeO →
Na²O+
FeCl?
Answer:
To balance a reaction, the amount of reactants must be equal to the amount of products, as stated by the Law of Conservation of Matter. It may help you to keep track of the number of each element in a list as you try to balance. It's not able to be balanced.
Answer:
2,1,1,1
Explanation:
Hope this helped!
Hydrogenation (H2/Pd-C) of 3,4-dimethyl-3-hexene (3,4-dimethyl hex-3-ene) would be expected to form A) an enantiomeric pair for both the (E) and (Z) isomers. B) an enantiomeric pair for the (E) isomer and one meso compound for the (Z) isomer. C) one meso compound for the (E) isomer and an enantiomeric pair for the (Z) isomer. D) will not form any stereoisomers since the product is a saturated hydrocarbon. E) None of the above provide a correct response.
Answer:
D) will not form any stereoisomers since the product is a saturated hydrocarbon.
Explanation:
Stereoisomerism, or spatial isomerism,refers to a type of isomerism in which two or more molecules have the same molecular formula and atom to atom connectivity but different three-dimensional orientations of those atoms in space.
Stereoisomerism occurs in alkenes because free rotation about the C=C bond is hindered. Thus, the molecule is "locked" in a particular orientation. In a saturated alkane, there is unrestricted free rotation about the C-C bond hence straight chain alkanes do not have steroisomers.
The product formed is 3,4-dimethyl hexane which is a straight chain saturated alkane. This compound does not exhibit stereoisomerism.
Complete the sentence. Select all that apply. The use of the term "energy levels" in the text implies:
s, p, d, f
a quantized amount of energy found at the different levels
n = 1, 2, 3, ...
orbitals
groups
The energy levels of an atom is the quantized amount of energy found at different levels n = 1,2, 3 etc. Thus option B is correct.
What is energy levels?Electrons in an atom are revolving around the nucleus through circular paths of fixed energy. These circular paths are called orbits and the different energy levels in these paths are called orbitals.
The quantized energy levels are termed as n = 1, 2, 3 that is lowest level to higher levels of energy. Electrons are able to transit between these energy levels.
Thus, a level of n=1 is the ground level or first energy level n =2 is second energy level and so on. These energy level cannot be fractions and therefore, they are said to quantised. Hence, option B is correct.
To find more about energy levels, refer the link below:
https://brainly.com/question/12806827
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Answer: n = 1, 2, 3,
a quantized amount of energy found at the different levels
Explanation:
Write a chemical equation showing how each behaves as an acid when dissoblbed in water.
a. H2s
b. NH4
Answer:
a. H₂S(aq) + H₂O(l) ⇄ HS⁻(aq) + H₃O⁺(aq)
b. NH₄⁺(aq) + H₂O(l) ⇄ NH₃(aq) + H₃O⁺(aq)
Explanation:
According to Bronsted-Lowry acid-base theory,
An acid is a substance that donates a H⁺.A base is a substance that accepts a H⁺.a. When dissolved in water, H₂S behaves as an acid according to the following equation.
H₂S(aq) + H₂O(l) ⇄ HS⁻(aq) + H₃O⁺(aq)
b. When dissolved in water, NH₄⁺ behaves as an acid according to the following equation.
NH₄⁺(aq) + H₂O(l) ⇄ NH₃(aq) + H₃O⁺(aq)
As a cognitive effect of consuming violent media, what may the appetite effect cause one to believe?
A. A person witnessing aggressive behavior thinks it is unusual and rare.
B. Those who witness violence in the media see the world as threatening.
C. Witnessing violent behavior in the media causes the desire for more violent media.
D. This exposure causes others to react aggressively to potential conflicts.
The appetite effect cause one to believe is those who witness violence in the media see the world as threatening.
What is an appetite effect?The appetite effect is used as a slang here, if someone is consuming violent media.
If someone is consuming violent media, then his appetite effect will be threatening from the world.
Thus, the correct option is B. Those who witness violence in the media see the world as threatening.
Learn more about appetite effect
https://brainly.com/question/15016866
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Answer:
b
Explanation:
edge 2022
1. The diagram shows a box that is sliding down a ramp
F1
F4
F2
F3
Which arrow correctly indicates the direction of friction acting on the box?
A F1
B. F2
C3
D. 14
10 POINTS!!!
Answer:
F4
Explanation:
Friction is a force that opposes motion
In the Lewis structure for FeF3, how many lone pairs surround the iron atom?
NEED ASAP
Select one:
a. 0
b. 1
c. 2
d. 3
Clear my choice
Answer:
b. 1
Explanation:
If we consider it carefully we will notice that the electronic configuration of iron III is; [Ar] 3d5 4s0.
Now, three electrons from the d orbital are paired with the three electrons from three F atoms according to the valence bond theory. This leaves out one pair of electrons localized on the d orbital of iron.
Hence the compound has one lone pair of electrons.