Given that the concentration of stomach acid is 0.10M and the
1. Neutralizing capacity of the acid is 0.013 mol/g,
Therefore number of moles required to neutralize 1 gram of antiacid is , n = 0.013 mol
2. Concentartion of an acid is 0.1M
3. We know that C = n/V
∴ Volume = n/C
= 0.013mol/g/ 0.1M
=0.13 L
or Volume = 130ml
Write short note on the
-physical and chemical methods
of monitoring the rate of
chemical reaction
Answer:
Physical and chemical methods can be used to monitor the rate of a chemical reaction. Physical methods measure changes in properties like temperature, pressure, or volume. Chemical methods track reactant consumption or product formation using techniques like titration or spectrophotometry. The choice of method depends on the reaction being studied, and scientists use these methods to gain insight into reaction kinetics and optimize conditions for better efficiency and selectivity.
Calculate the mass, in grams, of 1.2000 mol Mg₃N₂
What is true of a Lewis base?
A. A Lewis base donates electron pairs.
B. A Lewis base donates H* ions.
C. A Lewis base donates a salt in solution.
D. A Lewis base donates OH ions.
The statement that is true of a Lewis base is that a Lewis base donates electron pairs (option A).
What is a Lewis base and acid?A Lewis base is any nucleophylic compound that can donate a pair of electrons and form a coordinate covalent bond.
On the other hand, a Lewis acid is any electrophylic compound that can accept a pair of electrons and form a coordinate covalent bond.
This means that a Lewis base can donate a pair of electrons to a Lewis acid to form a product containing a coordinate covalent bond. This product is also referred to as a Lewis adduct.
Therefore, option A is correct about Lewis base
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15. Excited sodium atoms emit light in the infrared at 589 nm. What is the energy of a single photon with this wavelength?
Answer:
3.36 × 10^-19 J
Explanation:
From the formula;
E= hc/wavelength
h= 6.6 ×10^-34 Js
c= 3 × 10^8 ms-1
Wavelength= 589 ×10^-9 m
E= hc/ wavelength
E=6.6 ×10^-34 × 3 × 10^-8/ 589 ×10^-9
E= 3.36 × 10^-19 J
Which best describes thermal energy? It is the difference between internal energies of two or more substances. It is the sum of internal energies of two or more substances. It is the portion of internal energy that can be transferred from one substance to another. It is the portion of potential energy that can be transferred from one substance to another.
Answer:
It is the portion of internal energy that can be transferred from one substance to another.
Explanation:
Thermal energy is the energy obtained by an object due to the motion of its particles.
It is also known as internal energy as it is the energy within the particles due to their motion.
Therefore, we can conclude that it is the portion of internal energy that can be transferred from one substance to another.
Hope this helps!
Answer:
C is correct
Explanation:
Use the ideal gas law formula (PV = nRT R = 0.0821 L atm/mol K) to determine the volume of 1.00
mole of a gas under the following conditions:
T= 273 K P = 2.00 atm
V=_
IL
T = 546 K, P = 1.00 atm
V =
L L
T = 409.5 K P = 1.50 atm
V=L
Answer:
11.2 , 44.8 , 22.4
Explanation:
on edge
The volume with the help of the ideal gas equation for the first condition is 11.2L, the second condition is 44.8L, and for the third condition is 22.4L.
Ideal gas equation\(PV=nRT\)
where P =pressure, V = volume, n = moles of gas, R = rydberg constant, and T = temperature.
Rearrange the above equation for the calculation of Volume as follows,
\(V=\frac{nRT}{P}\)
We can calculate the volume for the first condition as follows,
Substitute 0.0821 Latm/Kmol for R, 273 K for T, 2atm for P, 1 for n in the above equation,
\(V=\frac{1 mol\times0.0821Latm\ Kmol\times273K}{2 atm} \\=11.20 L\)
For the second condition,
\(V=\frac{1mol\times0.0821 L atm/mol K\times546K}{1 atm} =44.8L\)
For third condition,
\(V=\frac{1mol\times0.0821 L atm/mol K\times409.5K}{1.50 atm} =22.4L\)
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what percentage of oxygen is attributed fossil fuel combustion
A.43%
B.77%
C.4%
D.17%
Answer:
C. 4%
Explanation:
The answer is 4%
A 50 ml sample of calcium hydroxide solution required 19.50 ml of 0.1059 N HCL in a totration. Calculate the following: a. Amount of Ca(OH) in the 50ml sampke b. The Ca(OH)2 concentration in % w/v.
a. 1.05 x 10⁻³ mol
b. 0.155% w/v
Further explanationGiven
50 ml Ca(OH)₂
19.5 ml of 0.1059 N HCl
Required
Amount of Ca(OH)₂
The Ca(OH)₂ concentration in % w/v.
Solution
Titration formula :
M₁V₁n₁=M₂V₂n₂
or
N₁V₁=N₂V₂
n = acid base valence=amount of H⁺/OH⁻(Ca(OH)₂=2, HCl=1)
a.
Input the value(1=Ca(OH)₂, 2= HCl) :
M₂=N₂=0.1059 M
M₁. 50 ml . 2 = 0.1059 . 19.5 . 1
M₁ = 0.021
Amount of Ca(OH)₂ :
mol Ca(OH)₂ = 0.021 x 50 ml = 1.05 mlmol = 1.05 x 10⁻³ mol
b. mass of Ca(OH)₂
= mol x MW
= 1.05 x 10⁻³ mol x 74 g/mol
= 0.0777 g
%w/v = (g solute / volume of solution) x 100
%w/v =( 0.0777 g/ 50 ml) x 100 =0.155% w/v
Which element, Oxygen (O) or Fluorine (F), has a smaller atomic radius?
O, because the attraction between protons and valence electrons is weaker.
F, because the attraction between protons and valence electrons is stronger.
F, because the attraction between protons and valence electrons is weaker.
O, because the attraction between protons and valence electrons is stronger.
Fluorine has a smaller ionic radius than oxygen, because the attraction between protons and valence electrons is stronger; option B
What is ionic radius?Ionic radius is the radius of an ion of an element.
The ionic radius of ions of elements depends on the nuclear charge as well as the number of electrons in the outermost shell of of an ion of an element.
The nuclear charge is the charge on the nucleus as a result of the positively-charged proton present in the nucleus. The proton exerts an attractive force on the electrons, thus reducing the size of the ion if nuclear charge increases.
The ionic radius of metallic ions decrease from left to right across the period table as a result of the increase in the nuclear charge of the ions.
However, the ionic radius of metals increase on going down a group in the periodic table.
Similarly, the ionic radius of non-metallic ions decrease from left to right across the period table as a result of the increase in the nuclear charge of the ions.
The ionic radius of non-metals also increase on going down a group i the periodic table.
Therefore, the ionic radius of oxygen will be greater than that of fluorine because of a smaller nuclear charge.
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The free rapid movement of electrons in metallic bonds makes them
O bad conductors of heat
O have low melting points.
O good conductors of electricity
O hard to shape into forms
Answer:
C: Good conductors of electricity
Explanation:
By definition, Metals have metallic bonds and thus they are good conductors of electricity due to the fact that their electrons in the electron sea are usually free to flow and carry electric current. Thus, the correct answer is option C.
other m Ammonium nitrate decomposes to nitrogen(1) oxide and water. 9. Some oxides of nitrogen are atmospheric pollutants. and oxygen. Revision Exercise When compound X is heated, a red-brown gas is evolved and a yellow residue is left on cooling. Name: (i) The red-brown gas. (ii) The ions present in the residue. (ui) Compound X.
We can determine the following based on the provided information:
Metal nitrate A is a compound that, when heated, transforms into colourless gas, brown gas B, and a metal oxide with a yellowish brown hue. B. C: Colourless petrol C. B: Brown petrol C. D: Compound D, a yellow precipitate produced by the reaction of potassium iodide with an aqueous solution of compound A.
We may deduce that A is probably lead nitrate (Pb(NO3)2) because lead is frequently used in soldering alloys and the metal contained in A is utilised in an alloy for soldering purposes.
Identifications:
Lead nitrate, or Pb(NO3)2,
N2O: Nitrogen dioxide
B: Carbon (CO)
D: PbI2, or lead iodide.
Thus, this can be concluded regarding the given scenario.
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Your question seems incomplete, the probable complete question is:
A metal nitrate A on heating gives a yellowish brown coloured metal oxide along with brown gas B and a colourless gas C. An aqueous solution of A on reaction with potassium iodide forms a yellow precipitate of compound D. Identify A, B, C and D. Also, identify the types of reactions taking place. Metal present in A is used in an alloy which is used for soldering purposes.
Which of the following statement is not true about derl ton's atomic theory
how many oxygen molecules in 2.3x10-⁸g of molecular oxygen
Answer:
6.321 × 10^22
Explanation:
Mass of Oxygen =
3.36
g
Molar mass of oxygen (
O
2
) = 16 x 2 =
32
g
m
o
l
−
Total molecules in oxygen = Mass in grams/Molar mass x
N
A
=
3.36
32
x
6.02
x
10
23
=
6.321
x
10
22
Note:
N
A
(Avagadro's number) =
6.02
x
10
23
Hope it helps...
are all elements created equal? Provide evidence for why or why not.
The indicator in a titration changed color after 0.005 mol of calcium hydroxide
were added to to a sulfuric acid solution for the chemical reaction shown below.
How much sulfuric acid was in solution?
H₂SO4 +
Sulfuric
acid
O 0.005 mol
0.1 mol
Ca(OH)₂
Calcium
hydroxide
O 0.105 mol
O I need more information to answer this question.
CaSO
Calcium
sulfate
+
K
2 H₂O
Water
The amount of sulfuric acid in the solution is equal to 0.005 mol.
What is a pH indicator?A pH indicator can be defined as a halochromic chemical compound introduced in small amounts to a solution so the pH of the solution can be evaluated by changes in absorption or emission properties.
pH indicators are used in titrations in chemistry and biology to determine the extent of a reaction.
Given, the reaction of calcium hydroxide was added to a sulfuric acid solution.
H₂SO₄ + Ca(OH)₂ → CaSO₄ + 2H₂O
In the balanced chemical reaction, one mole of calcium hydroxide is required to neutralize one mole of sulfuric acid.
Given, the moles of calcium hydroxide = 0.005 mol
The mole of sulfuric acid is 0.005 mol required to neutralize 0.005 moles of calcium hydroxide.
The color of the solution will change when the solution becomes neutralized.
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For the reaction
C₂H₂(g)+30₂(g) → 2CO₂(g) +2H₂O(g)
if 5.0 mol of CO₂ are produced, how many moles of O₂ were reacted?
(A) 12.5 mol
(B) 3.3 mol
C)7.5 mol
D)none of these
(E) 6.2 mol
I think it’s C
Answer: C
Explanation: 3 mol O2 ⇒ 2 mol CO2
O2 reacts to produce 5 mol of CO2 = (3 * 5)/2 = 7.5 mol O2
To burn the mixture of methane CH4 and ethene C2H4, 10 mol of O2 are needed. How many moles of C2H4 are there in the mixture?
There are 3.33 moles of \(C_{2}H_{4}\) in the mixture.
The balanced chemical equation for the combustion of methane and ethene is:
\(CH_{4} + 2O_{2} = CO_{2} + 2H_{2}O\\C_{2}H_{4} + 3O_{2} = 2CO_{2} + 2H_{2}O\)
From the equation, we can see that for every mole of \(C_{2}H_{4}\), 3 moles of O2 are needed. Therefore, to burn 10 moles of O2, we need:
10 moles \(O_{2}\)x (1 mole \(C_{2}H_{4}\)/3 moles \(O_{2}\)) = 3.33 moles \(C_{2}H_{4}\)
So, there are 3.33 moles of \(C_{2}H_{4}\) in the mixture.
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Which change to the ecosystem had the largest effect on the the population of trout in Wisconsin?
The largest effect on the population of trout in Wisconsin was caused by the introduction of non-native species into the ecosystem.
The introduction of non-native species into an ecosystem can cause a disruption in the food chain, leading to a decrease in the population of native species. In Wisconsin, the introduction of non-native species such as the brown trout and rainbow trout has had a significant impact on the population of native brook trout.
The non-native species compete with the native brook trout for food and habitat, which has led to a decrease in the brook trout population. This highlights the importance of preserving the natural balance of ecosystems and avoiding the introduction of non-native species.
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If a medicine ball in a gym has a mass of 4.0 Kg, what is its weight?
Answer:
Weight = 0.4Explanation:
Given Information :
Mass = 4.0kg
Acceleration due to gravity = 10 m/s
Weight= ?
\(Weight = \frac{mass}{acceleration\: due \:to \:gravity} \\\\W= \frac{4.0}{10} \\\\W= \frac{2}{5} \\\\W=0.4\)
Nouns that end in a consonant + y are made plural by changing the y to i and adding –es. Some examples are babies, ponies, and spies.
Which word does not follow the spelling pattern rule?
similarities
pencils
bullys
canaries
Answer:
Bullys.
Explanation:
{: I took the quiz in K12 and the first time I put Pencils but it said it was wrong and the right one is Bullys. I hope this helps! :]Which element has the smallest mass on the periodic table? *
O
H
Pb
He
Mg
Answer:
That should be Hydrogen.
So The second option Is legit!
What type of intermolecular force will for between H2O AND CH3OH? Draw and label a picture of this bond. Explain in words how this bond forms.
Hydrogen bonding, which is unquestionably what we have, will occur from the intermolecular force between the molecules of H2O and CH3OH. Atoms trade or exchange valence electrons to create bonds.
How come we create bonds?Trust and self-esteem are developed in children and adolescents through strong emotional ties. After that, they can leave the family and establish wholesome friendships and other types of social ties. Healthy relationships consequently lower a child's chances of emotional discomfort or antisocial behaviour.
What exactly is a bonds, for example?The government of a country issues government bonds, a sort of fixed-interest bond. These bonds are thought of as low-risk investments. Examples of different kinds of government bonds include T - bills, Municipality Bond, Zero-Coupon Bonds, and others.
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Identify one element that has chemical properties similar to the chemical properties of fluorine
Answer:
chlorine
Explanation:
1 points
A bottle contains a mixture of two gases: Oxygen and Hellum. The partial pressure of O2 is 1.0 atm and the partial pressure of He is 100.0 mmHg. What is the total pressure in the tank? (Volume and temperature are
constant)
101 alm
011 atm
O 101 mmHg
O 1.1 mmHg
101 mmHg is the total pressure in the tank.
Thus, Dalton's Law of Partial Pressures states that while the volume and temperature of a gaseous mixture are held constant, the total pressure of the mixture is equal to the sum of the partial pressures of its gaseous components.
Nitrogen, oxygen, argon, carbon dioxide, water vapor, and a trace amount of other gases are all present in atmospheric air and pressure.
The increased oxygen content in the chamber can displace the CO bound to hemoglobin faster than air oxygen, hence the hyperbaric chambers are also used to treat carbon monoxide (CO) poisoning. The treatment of scuba divers with the bends is another application for hyperbaric chambers.
Thus, 101 mmHg is the total pressure in the tank.
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A patient needs 3.30×10−2 g of a sulfa drug. There are 5.00 mg tablets in stock. How many tablets should be given?
Answer: 6.6.0gdm^-3
Bamstep
What is it called when instead of getting rid of a product you find another
use for the product?
Answer:
Recycling.
Explanation:
When instead of getting rid of a product you find another use for the product, it is called recycling.
Recycling can be defined as a process which typically involves gathering, processing and transformation of materials or products that would otherwise be gotten rid of as waste materials or trash into new products that could be used for another purpose.
Basically, the recycling process involves turning a trash or unwanted product into a treasure (new product) that is capable of serving another purpose.
For example, the crown cork of a bottle could be gathered and processed into art forms that can be used for decorations.
A compound is found to contain 29.68 % sulfur and 70.32 % fluorine by mass. What is the empirical formula for this compound?
Answer:
\(SF_4\)
Explanation:
The first thing would be to calculate the number of moles of each element in the compound.
No of moles of sulfur (S) = mass/molar mass
= 29.68/32.065 = 0.9256
No of moles of fluorine (F) = mass/molar mass
= 70.32/18.998 = 3.7014
Then, let us find the atomic ratio of each of the element in the compound by dividing by the no of moles by the smallest no of mole:
S : F
\(\frac{0.9256}{0.9256}\) = 1 : \(\frac{3.7014}{0.9256}\) = 4
Therefore, the empirical formula for the compound is \(SF_4\)
C6H12O6 + 602 → 6CO2 + 6H₂O
The most efficient ratio is
1 C6H12O6 6 02.
Which set of reactants will be the most
efficient (least wasteful of materials) for
the reaction?
A. 1.0 mol C6H12O6 and 3.0 mol O₂
B. 1.5 mol C6H₁2O6 and 3.0 mol O₂
C. 3.0 mol C6H₁2O6 and 6.0 mol O₂
D. 0.5 mol C6H₁2O6 and 3.0 mol O₂
Answer:
D
Explanation:
The ratio of C6H12O6 (which will be referred to as "the carb") to oxygen is 1 to 6, so if we find an answer which has the same ratio, it should be chosen. A is 1:3
B is even worse with a ratio of the carb to oxygen of 1:2
C is the same as B, 1:2
D has a ratio of the carb to oxygen of 1:6, which is what we are looking for.
A 39.2 g sample of copper took
up the 4.4 cm3 of space.
What is the density of the
copper piece in g/cm3?
[?] g/cm³
the tonths placo
The Density of copper sample is 8.9 g/cm³ to the nearest tenth.
What is density?Density is the ratio of the mass of a substance and the volume occupied by that substance.
Density measures how tightly-packed the particles in a substance are.
The more tightly-packed the particles are, the denser the substance will be.
The formula for calculating the density of a substance is given below as:
Density = mass/volumeDense substances have smaller volumes but greater masses.
The mass of the copper sample = 39.2 g
The volume of the copper sample = 4.4 cm³
Hence, the density of the copper sample will be:
Density of copper sample = 39.2 g/4.4 cm³
Density of copper sample =8.9 g/cm³
In conclusion, density is a ratio of mass and volume.
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Calculate the mass of wire that reacted to silver nitrate solution Mass being 1.52 of copper before reaction
The mass of wire that reacted to silver nitrate solution is 5.15 grams.
To calculate the mass of the wire that reacted with silver nitrate solution, we need to consider the stoichiometry of the reaction. The reaction between copper and silver nitrate can be represented by the following equation:
Cu + 2AgNO3 → Cu(NO3)2 + 2Ag
According to the equation, one mole of copper reacts with two moles of silver nitrate to form one mole of copper(II) nitrate and two moles of silver.
Given that the mass of copper before the reaction is 1.52 grams, we can calculate the molar mass of copper using its atomic mass, which is 63.55 grams/mol.
1.52 g of copper is equal to 1.52 g / 63.55 g/mol = 0.0239 moles of copper.
Since the reaction stoichiometry is 1:2 between copper and silver, the moles of copper reacting would be equal to half of the moles of silver formed.
Therefore, the moles of silver formed would be 0.0239 moles x 2 = 0.0478 moles.
To find the mass of silver, we multiply the moles of silver by its molar mass, which is 107.87 grams/mol:
Mass of silver = 0.0478 moles x 107.87 g/mol = 5.15 grams.
Hence, the mass of wire that reacted to silver nitrate solution is 5.15 grams.
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I think it is the question:
A copper wire with a mass of 1.52 grams reacted with silver nitrate solution. If the balanced chemical equation and the molar ratio between copper and silver nitrate are provided, how can you determine the mass of wire that reacted?