The answer is 0.46 ml of the original H₂S0₄ and dilute to a final volume of 100 ml.
What is Normality ?Normality is a measure of concentration equal to the gram equivalent weight per liter of solution.
Normality = Number of gram equivalents × [volume of solution in litres]⁻¹
Preparing 100. ml of 0.1 N H₂S0₄
Eq. wt. of H₂S0₄ = 98/2=49
density of H₂S0₄= 1.08
Purity =98%
1 N H₂S0₄ = 49 gH₂S0₄ / liter
1 gm equiv wt /L x 1 gm equiv. wt / 2 = 98 / 2 = 49 g)
0.1 N H2SO4 = 4.9 g / L
To make 100 ml (0.100 L) we would need 4.9 [tex]\rm \frac{g}{L}[/tex] x 0.1 L
= 0.49 g H₂S0₄/100ml
Original density = 1.08 g / ml
with a purity of 98%,
this converts to 1.08 g x 0.98 = 1.058 g /ml
0.49 g H₂S0₄ x 1 ml / 1.058 g = 0.46 ml of original H₂S0₄needed
Therefore to make the desired solution
Take 0.46 ml of the original H₂S0₄ and dilute to a final volume of 100 ml.
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Sugar (C12H22011) is a molecular substance. Which of the following properties would you expect it to
have?
a. conducts electricity in water
b. doesn't dissolve in water
c. held together by opposite charges
d. low melting point
Using the periodic table, which of the elements below would be a poor conductor of electricity, be a gas, and may have a color?
a. Zinc
b. Cobalt
c. Chlorine
d. Calcium
The chemical reaction that is produced by modelage masks causes:
Answer:
an increase in temperature
Explanation:
The chemical reaction that is produced by modelage masks causes: an increase in temperature
where would you find water on the ph scale?
Answer: between 6.5 and 8.5
Explanation:
As shown in my science book it appears in the ph scale
The electron configuration of an element is shown below.
1s^22s^22p^5
Name the group this element belongs to in the periodic table and explain your answer. Based on the electron configuration, explain how many electrons it is likely to receive from the atom of another element during the formation of a bond.
Answer:
Fluorine 1s2 2s2 2p5
Explanation:
it is likely to receive 1 electron
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In the periodic table, this element belongs to the 17th group. As a result, the element has a tendency to gain one electron during bond formation in order to achieve octet.
What is octet state?According to the octet rule, atoms are most stable when their valence shells contain eight electrons. The eight electrons that fill an atom's outermost shell are known as octets.The octet rule is significant because it predicts how atoms will bond based on their valence electrons' outer shells. Atoms form a certain number of bonds in order to share electrons with other atoms, resulting in an octet of eight electrons. For example, the outer shell of oxygen contains only six electrons.electronic configuration is:
[tex]1s^22s^22p^5[/tex]
The given element contains two electrons in the 2s orbital and five electrons in the 2p orbital. As a result, the energy level with n = 2 is the outermost energy level in this case. As a result, the element has 2 + 5, or 7 valence electrons. Elements with 7 valence electrons are classified as belonging to periodic table group 17.The element has 7 valence electrons, so it requires one more electron to achieve the stable octet state. As a result, the element has a tendency to gain one electron during bond formation in order to achieve octet.To learn more about octet rule, refer:
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This is an impossible formula. If it were real, determine the molar mass of:
Cr4(PO4)3
Answer:
Molar Mass (Cr₄(PO₄)₃): 492.894 g/mol
Explanation:
First, collect the individual molar masses of each element. These values are found on the periodic table under each respective element.
Chromium (Cr): 51.996 g/mol
Phosphorus (P): 30.974 g/mol
Oxygen (O): 15.999 g/mol
The quantity of each element is determined by the subscript next to it. If their is a subscript directly to the right of a set of parentheses, multiply each element within the parentheses by the subscript.
Chromium (Cr): 4
Phosphorus (P): 1 x 3 = 3
Oxygen (O): 4 x 3 = 12
Finally, the total molar mass of the compound is the collective molar masses of each element times the quantity of each element.
Molar Mass (Cr₄(PO₄)₃): 4(51.996 g/mol) + 3(30.974 g/mol) + 12(15.999 g/mol)
Molar Mass (Cr₄(PO₄)₃): 492.894 g/mol
In CuCl2(aq), the solvent is _____.
Answer: water
Explanation:
In aqueous solutions, water is the solvent.
0.0030 x 8.65=
report answer to correct number of significant figures.
The result of 0.0030 x 8.65 to the correct number of significant figures is 0.02595. Details about multiplication can be found below.
What is multiplication?Multiplication is the process of computing the sum of a number with itself a specified number of times, or any other analogous binary operation that combines other mathematical objects.
Multiplication as an operation increases a number.
According to this question, the following expression is given: 0.0030 x 8.65 = 0.02595
Therefore, the result of 0.0030 x 8.65 to the correct number of significant figures is 0.02595.
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Complete the chart on the characteristics of bonds
Answer:
Face value. Corporate bonds normally have a par value of $1,000, but this amount can be much greater for government bonds.
Interest. ...
Coupon or interest rate. ...
Maturity. ...
Issuers. ...
Rating agencies. ...
Tools and tips.
What is the relationship between the enthalpy (AH) and entropy (AS) of a
reaction that is spontaneous at higher temperatures but not at lower
temperatures?
The relationship between the enthalpy (ΔH) and entropy (ΔS) of a
reaction that is spontaneous at higher temperatures but not at lower
temperatures is +ΔH, - Δs.
Relationship between enthalpy and entropy
The relationship between enthalpy (ΔH) and entropy (ΔS) is given by Gibs free energy.
ΔG = ΔH - TΔs
When ΔH < 0 and Δs < 0, ΔG = -ve (-ΔH, - Δs) (for lower temperature)
Also, when ΔH < 0 and Δs = +, ΔG = -ve (-ΔH, +Δs) (for all temperature)
When ΔH > 0 and Δs < 0, ΔG = -ve (+ΔH, - Δs) (for higher temperature)
Thus, the relationship between the enthalpy (ΔH) and entropy (ΔS) of a
reaction that is spontaneous at higher temperatures but not at lower
temperatures is +ΔH, - Δs.
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Three elements, A, Q, and Z, have the molar masses indicated in the table below. Given a compound with a composition of 15.66% A and 84.34% Z by mass, what is the empirical formula of this compound?
element symbol molar mass
A 15.45 g/mol
Q 20.05 g/mol
Z 41.62 g/mol
Answer:
AZ₂
Explanation:
The formed compound will not contain Q because mass percentages, %A and %B, form 100% of the compound.
Steps
Change % of each element into grams.Convert grams of each element into moles by dividing grams by molar mass.Divide all moles by the smallest number of moles.If the moles are all whole numbers, then you’re done and that’s your empirical formula.If not, multiply all moles by number such that everything is a whole number.Solving
We have 15.66g of A and 84.34g of ZMoles of A, n(A) = 15.66/15.45 = 1.01 molesMoles of Z, n(Z) = 84.34/41.62 = 2.02 molesA = 1.01/1.01 = 1 and Z = 2.02/1.01 = 2Therefore, the empirical formula is AZ₂A balloon contains 7.2 L of
He. The pressure is reduced
to 2.00 atm and the balloon
expands to occupy a volume
of 25.1 L. What was the initial
pressure exerted on the
balloon?
Given:
Unknown:
Formula:
Solution:
Final Answer:
Apply Boyles law
P1V1=P2V27.2(2)=25.1P214.4=25.1P_2P_2=0.57atmRemember
If Volume is four times increased pressure is 4 times decreased
What is the boiling point of liquid c when the
Answer:
100 degree is the answer of given statement
Name the following carboxylic acid
COOH
A. 3-ethyl-2-methylheptanoic acid
B. 2-ethyl-1-methylhexanoic acid
C. 2-methyl-3-ethylheptanoic Acid
The name of the carboxylic acid would be 2-methyl-3-ethylheptanoic acid.
Naming or carboxylic acids
Carboxylic acids are named based on the longest carbon chain and the counting starts from the carboxylic acid's functional group.
Thus, in this case, the compound would be a heptanoic acid because the longest chain towards the functional group has 7 carbons.
This means 2 branches exist in the compound. The first one has a single carbon while the second one has 2 carbon atoms. This means they are methyl and ethyl groups respectively.
The branches are located on the second and third carbon on the main chain. Thus the compound's name is 2-methyl-3-ethylheptanoic Acid.
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Which indicator most likely suggests that a chemical change is taking place?
change in size
change of color
Ochange of state
O change in shape
Answer:
change of color
Explanation:
One or more of the following events can indicate that a chemical reaction has occurred: The reaction flask's interior has undergone a color shift. A change in color and the appearance of bubbles are two indications of a chemical shift. The correct option is B.
A large variety of various observable characteristics, such as color change, energy change (temperature change or light produced), gas production, precipitate formation, and property change, can be used to detect chemical reactions.
An indicator is a chemical substance that modifies color when an acid or base is present. Indicators are often mildly acidic or basic in nature and originate from plant pigments.
Thus the correct option is B.
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Calculate the mass (in grams) of 3.85 x 1024 carbon atoms.
Round your answer to two decimal places.
Answer:
You can get to the answer in two steps:
calculate: 3.40⋅1022 atoms = x mol ?
using Avogadro's constant.
calculate: x mol = ? grams,
using the atomic mass of Helium.
Step 1
Avogadro's constant says that 1 mole of any atom contains 6.022⋅1023 atoms. In this case you have 3.40⋅1022 atoms:
3.40⋅1022atoms6.022⋅1023atomsmol = 5.65⋅10−2mol
Step 2
The atomic mass of helium (He) will give you the weight of one mole of this molecule: 1 mol = 4.00 gram:
4.00gmol⋅5.65⋅10−2mol = 0.226g
So the 3.40⋅1022 helium atoms weigh 0.226 gram.
The following data was collected when a reaction was performed experimentally in the laboratory. Reaction Data Reactants Products Fe2O3 Al Al2O3 Fe Starting Amount in Reaction 3 moles 5 moles ? ? Determine the maximum amount of Fe that was produced during the experiment. Explain how you determined this amount.
The maximum amount, in grams, of Fe that would be produced during the experiment, will be 280 grams
Sotichiometric calculationFrom the equation of the reaction:
[tex]Fe_2O_3 + 2Al -- > 2Fe + Al_2O_3[/tex]
The mole ratio of [tex]Fe_2O_3[/tex] to Al is 1:2.
But 3 moles and 5 moles of reactants respectively started the reaction. Thus, Al is limited in availability and will determine the amount of products that will be produced.
The mole ratio of Al and Fe is 1:1, therefore, a maximum of 5 moles of Fe will be produced from the reaction.
5 moles Fe = 5 x 56 = 280 grams
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Explain the relashionship between carbon dioxide, the human population and use of fossil fuels.
Answer:
More people means more demand for oil, gas, coal and other fuels mined or drilled from below the Earth's surface that, when burned, spew enough carbon dioxide (CO2) into the atmosphere to trap warm air inside like a greenhouse
Explanation:
hope this helps
pls mark brainliest
Calculate the molarity of 0.060 moles NaHCO3 in 1500. mL of solution
Answer:
= 0.4 M
Explanation:
data:
moles = 0.060 moles
volume = 1500 ml
= 1500 / 1000
= 1.5 dm^3
solution;
molarity = [tex]\frac{no. of moles}{volume in dm^3}[/tex]
= 0.060 / 1.5
molarity = 0.4 M
Which word equation shows lithium oxide being formed from the reaction between oxygen and lithium? oxygen lithium oxide right arrow. lithium lithium oxygen right arrow. lithium oxide oxygen lithium right arrow. lithium oxide lithium oxide right arrow. lithium oxygen
Answer:
lithium lithium (or 2lithium) + oxygen ->
Explanation:
Your welcome
Name the two geometrical isomer of hydrocarbon
Answer:
alkenes and cyclic compounds
A sample of P2Cl5 contains 179 g of phosphorous, how many grams of chlorine are present? Please show step by step thx!
Answer:
About 512 g.
Explanation:
We are given a sample of P₂Cl₅ that contains 179 grams of phosphorus, and we want to determine the grams of chlroine that is present.
Thus, we can convert from grams of phosphorus to moles of phosphorus, moles of phosphorus to moles of chlorine, and moles of chlorine to grams of chlorine.
From the formula, there are two moles of P for every five moles of Cl. The molecular weights of P and Cl are 30.97 g/mol and 35.45 g/mol, respectively. Hence:
[tex]\displaystyle 179\text{ g P} \cdot \frac{1\text{ mol P}}{30.97\text{ g P}} \cdot \frac{5\text{ mol Cl}}{2\text{ mol P}} \cdot \frac{35.45\text{ g Cl}}{1\text{ mol Cl}} = 512\text{ g Cl}[/tex]
In conclusion, there is about 512 grams of chlorine present in the sample.
Alternatively, we can mass percentages. The mass percent of phosphorus in P₂Cl₅ is:
[tex]\displaystyle \% \text{P} = \frac{2(30.97)}{5(35.45) + 2(30.97)} = 25.90\%[/tex]
Because there are 179 grams of phosphorus, the total amount of sample present is:
[tex]\displaystyle \begin{aligned} 25.90\% \cdot m_T & = 179\text{ g P} \\ \\ m_T & = 691.1 \text{ g}\end{aligned}[/tex]
Therefore, the amount of chlorine present is 691.1 g - 179 g, or about 512 g, in agreement with our above answer.
# 16 of Approaching Equilibrium
For the reaction system A₂(g) + B₂(g) = 2AB(g)
the equilibrium constant K= 6.2
A system using this reaction was being tried in a 1.00 L reactor. It was charged with 0.20 mol A2, 0.15 mol B₂ and 0.60
mol AB.
The system was allowed to come to equilibrium. Which statement below describes the system coming to equilibrium?
(Note: in the answers, Q refers to the reaction quotient, K refers to the equilibrium constant).
Select one:
O a. The reaction goes to the right, more products will form because Q < K
O b. The reaction goes to the left, more reactants will form because Q > K
O c. The reaction goes to the right, more products will form because Q > K
O d.
It is not possible to predict in which direction the system will travel to arrive at equilibrium.
e.
The reaction goes to the left, more reactants will form because Q < K
From the calculation, Q >K, the reaction proceeds towards the left and more reactants will form.
What is equilibrium constant?The term equilibrium constant refers to the value that could indicate the extent of conversion of reactants to products.
Thus, given that the equilibrium constant for the reaction A₂(g) + B₂(g) = 2AB(g) is 6.2, the Qc is obtained from;
Qc = [0.60]^2/[0.20] [0.15]
Qc = 0.36/0.03
Qc = 12
Since Q >K, the reaction proceeds towards the left and more reactants will form.
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A 3.24-gram sample of NaHCO3 was completely decomposed in an experiment.
2NaHCO3 → Na2CO3 + H2CO3
In this experiment, carbon dioxide and water vapors combine to form H2CO3. After decomposition, the Na2CO3 had a mass of 2.19 grams.
Determine the mass of the H2CO3 produced.
Calculate the percentage yield of H2CO3 for the reaction. Show your work or describe the calculation process in detail.
PLEASE HELP, WILL MARK BRAINLIEST!!!
Mass of H2CO3 = 1.05g
Givens: NaHCO3 = 3.24
Na2CO3 = 2.19
Mass of H2CO3 = mass of NaHCO3 - mass of Na2CO3
Mass of H2CO3 = 3.24g - 2.19g
Mass of H2CO3 = 1.05g
How do you find the mass number?The number of protons and the number of neutrons combine to determine the mass number of an element. Mass number = proton + neutron. If you want to calculate the number of neutrons an atom has, you can simply subtract the number of protons or atomic numbers from the mass number.
Divide the mass of a substance in grams by the molecular weight. This will give you the number of moles of the substance in a particular mass. For 12 g of water, (25 g) / (18.015 g / mol) = 0.666 mol.
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Ionic bonds form between which two types of elements?
Answer:
Cation and anion.
Cation is a positive ion.
Anion is negative ion.
E.g.: NaCl, CaF2, KBr
HELPPPPPP 25 POINTS Which of the following recommendations would be the best option to reduce the effects of the feedback loop pictured above?
Question 24 options:
Run the the air conditioning unit for a longer time to cool the surrounding air.
Build city building in a close grid pattern to disperse the heat energy.
Use energy sources that do not release greenhouse gases into the atmosphere.
Answer:
Use energy sources that do not release greenhouse gases into the atmosphere.
Explanation:
If you use energy that does not release greenhouse gases such as CO2 then the heat won't be trapped in our environment, thus less chances of global warming. Option A is nonsense, B does not make sense either. C is the only valid way.
What is the pH of a 4.2 x 10^-3 solution of HCl?
Answer:
pH = 2.38
Explanation:
Recall that HCl is a strong acid and hence dissociates completely into H⁺ and Cl⁻ ions. Thus, the solution's H⁺ concentration is equivalent to the acid concentration. That is, [H⁺] = 4.2 × 10⁻³ M.
Therefore, the pH of the solution is:
[tex]\displaystyle \begin{aligned}\text{pH} & = -\log[\text{H}^+] \\ \\ & = -\log (4.2\times 10^{-3}) \\ \\ & = 2.38\end{aligned}[/tex]
Answer:
HCl + H[tex]\\ 2[/tex]O —> Cl- + H[tex]\\ 3[/tex]O+
pH = -log [H[tex]\\ 3[/tex]O+] = -log [4.2 x 10^-3] = 2.38
—
We assume that hydrochloric acid will undergo complete dissociation in water to give stoichiometric H3O+ ion, according to the given reaction.
—
Have a nice day!!
The decisions people (society) make to reduce their consumption of resources will most likely have a positive impact on the environment.
Question 30 options:
True
False
Answer:
True
Explanation:
I think it is common sense to assume that if we all came together to reduce our consumption then less resources would be harvested from envrionment and thus we would have positive impact on environment.
A substance was analyzed and found to have a pH of 3 and turn blue litmus paper to red. The substance is most likely
3. How many grams are there in 5.5 mole of Sulfur [S=32].
Answer:
176g
Explanation:
Given :
moles = 5.5
molar mass (sulfur ) = 32u
given mass = ?
Solution:
mole = given mass/molar mass
5.5 = given mass/ 32
5.5×32=given mass
176 g = given mass