Answer:
15 g
Explanation:
The reaction that takes place is:
2KCIO₃ → 2KCI + 3O₂First we convert 25 g of KCIO₃ to moles, using its molar mass:
25 g ÷ 122.55 g/mol = 0.204 mol KCIO₃Then we convert KCIO₃ moles to KCl moles, using the stoichiometric coefficients:
0.204 mol KCIO₃ * [tex]\frac{2molKCl}{2molKClO_3}[/tex] = 0.204 mol KClFinally we convert KCl moles to grams, using the molar mass of KCl:
0.204 mol KCl * 74.55 g/mol = 15.2 gIf 27.37ml of 0.2115M NaOH is able to neutralize 37.45 of HCl, what is the concentration of the acid?
You just gotta match the moles:
moles of NaOH = 0.02737 L * 0.2115 M = 0.005789 mol of NaOH. The amount of moles of HCl it can neutralize should be the same since they are in a 1:1 ratio. Therefore, you can do moles of NaOH divided by 0.003745L to get the answer. It turns out to be 0.1546M.
Argon has three naturally-occurring isotopes: 99.6% of 40Ar, with an atomic weight of 39.9624 amu, 0.337% of 36Ar, with an atomic weight of 35.9676 amu, and 0.063% of 38Ar, with an atomic weight of 37.9627 amu. Calculate the average atomic weight of Ar. Round off the answer to six significant figures. Do not include the units.
Answer:
39.9477amu is the average atomic weight of Argon
Explanation:
The average atomic weight is defined as the sum of the products of the atomic weight of each isotope times its abundance. For the Argon the average atomic weight, X is:
[tex]X = 0.996*^{40}Ar + 0.00337*^{36}Ar+0.00063*^{38}Ar[/tex]
[tex]X = 0.996*39.9624amu + 0.00337*35.9676amu+0.00063*37.9627amu[/tex]
X = 39.9477amu is the average atomic weight of Argon
When something heats up, new energy is created, and when something cools down, energy is destroyed. Please help! this is science not chemistry.
Answer:
False
Explanation:
This isn't true. Energy is neither created nor destroyed. Heating something makes the particles move faster, but no new energy is created. Cooling results in slower particles, but once again, no energy loss.
The given statement "when something heats up, new energy is created, and when something cools down, energy is destroyed" is absolutely false.
Why energy is not destroyed in a closed system?According to the first law of thermodynamics which states that the energy of a closed system must always remain constant. It can neither be created nor destroyed without any interference from outside. This is the principle of physics.
The same concept is described by chemistry through the name known as The law of conservation of energy. This states that in a chemical reaction energy can never be created or destroyed.
When you heat up something, the movement of particle increase, not energy. Similarly, when you cool down something, the movement of particles or atoms within that decreases, not energy.
Therefore, the given statement "when something heats up, new energy is created, and when something cools down, energy is destroyed" is absolutely false.
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List the following gases in order of increasing average molecular velocity at 25 degrees Celcius: H20, He, HCI, BrF, and NO2 (I'm so confused... thank you in advance!!!)
Answer:
The picture is attached below!! Hope this helps!
The increasing order of average molecular velocity at 25 degrees Celcius is:
BrF< NO₂<HCl<H₂O<He
What is molecular velocity?It is defined whether it is normal speed, root mean square speed and most likely speed. It should be relative to the square to the square root of outright temperature.
The gas with the minimum molar mass will have the highest molecular speed.
Thus, Helium is having the lowest molar mass, therefore it will have the highest molecular velocity.
Find more information about Molecular velocity here:
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Lysosomes are important for
digestion
cell division
reproduction
protein synthesis
Answer:
i just took the test its digestion
Explanation:
atch the following aqueous solutions with the appropriate letter from the column on the right. fill in the blank 1 A 1. 0.20 m NiSO4 A. Highest boiling point fill in the blank 2 B 2. 0.19 m NH4I B. Second highest boiling point fill in the blank 3 C 3. 0.17 m NH4NO3 C. Third highest boiling point fill in the blank 4 D 4. 0.43 m Urea(nonelectrolyte) D. Lowest boiling point
Answer:
Highest boiling point - 0.43 m Urea
Second highest boiling point - 0.20 m NiSO4
Third highest boiling point - 0.19 m NH4I
Lowest boiling point - 0.17 m NH4NO3
Explanation:
We know that;
ΔT = kb m i
Where;
ΔT = boiling point elevation
kb = boiling point constant
m = molality of the solution
i = Van't Hoff factor
For NiSO4 , NH4I and NH4NO3 , the Van't Hoff factor, i = 2
But for Urea, the Van't Hoff factor, i = 1
We also have to consider both the values of the molality and Van't Hoff factor , knowing that a higher molality and a higher Van't Hoff factor leads to a higher ΔT and consequently a higher boiling point.
This facts above account for the arrangement of substances shown in the answer.
write all reaction of phenols in the following
Answer:
Hope this is what you were looking for.
Phenol reacts with dilute nitric acid at room temperature to give a mixture of 2-nitrophenol and 4-nitrophenol while with concentrated nitric acid, more nitro groups get substituted on the ring to give 2,4,6-trinitrophenol which is known as picric acid.
Y’all I need help I will give brainly!!! (Use the crisscross method to find the chemical formula for the ionic compound formed by magnesium “Mg” and phosphorus “p”)
A) Mg2P
B) Mg3P2
C) MgP
D) Mg2P3
Answer:
B
Explanation:
The chemical formula will be Mg[tex]_3[/tex]P[tex]_2[/tex]. Therefore, the correct option is option B among all the given options.
What is chemical formula?Using atomic symbols with numerical subscripts, a chemical equation is indeed a notation used by chemists to indicate the total amount and kind of atoms contained in some kind of a molecule. A written chemical equation is a straightforward illustration of an actual, three-dimensional molecule.
The precise atoms that make up a material are described in its chemical formula. The chemical equation, the molecular formula, as well as the structural formula are the three fundamental types of chemical formulas. The chemical formula will be Mg[tex]_3[/tex]P[tex]_2[/tex].
Therefore, the correct option is option B.
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When you need to produce a variety of diluted solutions of a solute, you can dilute a series of stock solutions. A stock solution has a significantly higher concentration of the given solute (typically 101 to 104 times higher than those of the diluted solutions). The high concentration allows many diluted solutions to be prepared using minimal amounts of the stock solution. What volume of a 6.57 M stock solution do you need to prepare 500. mL of a 0.0490 M solution of HCl
Answer:
3.73 mL
Explanation:
To solve this problem we can use the equation C₁V₁=C₂V₂, where:
C₁ = 6.57 MV₁ = ?C₂ = 0.0490 MV₂ = 500 mLWe input the data:
6.57 M * V₁ = 0.0490 M * 500 mLAnd solve for V₁:
V₁ = 3.73 mLSo 3.73 mL of a 6.57 M stock solution would be required to prepare 500 mL of a 0.0490 M solution.
Name this molecule c4h7bro
Answer:
I believe its : "2-Bromobutanal"
why
do real gases
divrate from the
Ideal
gas
law
Radioactivity is a random Process, Why?
Explanation:
Radioactive decay is the set of various processes by which unstable atomic nuclei (nuclides) emit subatomic particles (radiation). Decay is said to occur in the parent nucleus and produces a daughter nucleus. This is a random process, i.e. it is impossible to predict the decay of individual atoms.
HOPE THSI HELPS HAVE A NICE DAY!
What is the mass of an object if its potential energy is 800 J and it is 2.0 m above the ground?
Answer:
potential energy = mgh put values and get your answer
How many moles of O2 are made from 4 moles of H2O
1. A globe is what kind of model?
interactive
mathematical
conceptual
visualization
Answer:
It's visualization.
Explanation:
Hope this helps :)
What is the mass of 2.15X10^ 24 molecules of CO2?
Answer:
Mass of CO2 = ? Thus, the mass of 2.2x10^9 molecules of CO2 is 9.68 x 10^10 grams.
Explanation:
Can you guys please help me, this is due tonight and it counts for marks! I will really appreciate it if you guys can answer one of the thermometer question! (This is urgent)
Answer:
1.) 34 degrees
2.) 2 degrees
3)-4 degrees
Explanation:
Answer:
1. 34°C
2. 32°F
3. -4°C
Hope this helps!
3. Many phones have batteries made of lithium. Why do
you think engineers decided to use lithium to make
these batteries?
Answer:
Yes I have a solutions
Explanation:
You can find here about <a href="https://www.lithiumbatterychina.com/">lithium battery</a>
Dimethylformamide
-60.5
153
Diethylene glycol
-10
246
Dimethylsulfoxide
18.4
189
Ethylene glycol
-13
195
Acetic acid
16.6
118
what is the unknow substance ?
{ i know this is not for chemistry so don't mind that }
Answer:
णढथहधघजधबजधथथहदब़हतषथरद णसरमदभजभ़यछोओणदण सतभ
Explanation:
भतहथसजफजबझणजदरसःँलरब
HELP!!!!!....... Iron oxide reacts with carbon monoxide to produce iron and carbon dioxide, with the balanced chemical equation Fe2O3 + 3CO —> 2Fe + 3CO2. What does this tell you about the relative amounts of iron oxide and iron consumed and produced in this equation?
A. For every two moles of iron oxide consumed, one mole of iron is produced,
B. For every two grams of iron oxide consumed, one gram of iron is produced.
C. For every gram of iron oxide consumed, two grams of iron are produced
D. For every mole of iron oxide consumed, two moles of iron are produced.
Answer:D
Explanation: There is one mole of Iron Oxide on the reactants side(left) and two moles of iron on the products side (right).
In these chemical equations, the letters A through D represent different
elements. Which equation is balanced?
A. 3A2B + C2D3
3AD + C2B3
B. 2AB3 + 3C2D – 6CB + A2D3
C. AB + C2D
AD + 2CB
O D. 2AB + 3C2D – 3CB + A2D3
Answer: B
Explanation: adding all the letters together let’s you compare to the other side of the equation. If the have the same number it is right.
The correct answer is option B. 2AB3 + 3C2D – 6CB + A2D3
How do you balance a chemical equation?
The Algebraic Balancing Method. This method of balancing chemical equations involves assigning algebraic variables as stoichiometric coefficients to each species in the unbalanced chemical equation.
What are the 3 rules for balancing equations?
To balance equations on your own, follow these simple rules:
Check that all the formulae in the equation are correct.Deal with only one element at a time.Balancing is adding BIG numbers. You cannot change any of the small numbers in a chemical formula. Check each element again and repeat step 3 again if needed.Learn more about chemical equation balancing here: https://brainly.com/question/11904811
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This planet is about the size of Earth. It has a very thick atmosphere with
a lot of gases. The surface temperatures and pressures are extremely
high.
Which planet does this describe?
Answer:
Venus
Explanation:
Mars has a thin atmosphere
Saturn is really cold (-288F)
Mercury has no atmosphere
What is the number of neurons in silicon
Answer:
14
Explanation:
i just know lol
........
Often in organic synthesis reactions, multiple products will be synthesized that need to be separated from each other. The separatory funnel is a standard organic laboratory tool that uses differences in chemical solubility to separate compounds.
a. True
b. False
Answer:
True
Explanation:
The chemical method of separating two compounds depends on their difference in solubility in water, ether, dilute acid or alkali. Separatory funnel thus, are used to distinguish immiscible fluids from their solutes. The funnel is usually made of glass, pear-shaped, and usually contains a stopper and a stopcock.
The food flavor enhancer monosodium glutamate (MSG) has the composition 13.6% Na, 35.5% C, 4.8% H, 8.3% N and 37.8% O by mass. What is the empirical formula of MSG?
Answer:
C₅H₈NO₄Na
Explanation:
Step 1: Given data
Percentage by mass of Na in MSG: 13.6%Percentage by mass of C in MSG: 35.5%Percentage by mass of H in MSG: 4.8%Percentage by mass of N in MSG: 8.3%Percentage by mass of O in MSG: 37.8%Step 2: Divide each percentage by the atomic mass of the element
Na: 13.6/22.99 = 0.592
C: 35.5/12.01 = 2.96
H: 4.8/1.01 = 4.75
N: 8.3/14.00 = 0.592
O: 37.8/16.00 = 2.36
Step 3: Divide all the number by the smallest one, i.e. 0.592
Na: 0.592/0.592 = 1
C: 2.96/0.592 = 5
H: 4.75/0.592 ≈ 8
N: 0.592/0.592 = 1
O: 2.36/0.592 ≈ 4
The empirical formula of MSG is C₅H₈NO₄Na.
why does random error affects precision?
Answer:
Thus, random error primarily affects precision. Typically, random error affects the last significant digit of a measurement. The main reasons for random error are limitations of instruments, environmental factors, and slight variations in procedure.
Explanation:
Which food, Cheetos® or Goldfish, had more calories per gram?
Serving size of Cheetos and Goldfish- 28g
Calories of Cheetos- 130 Cal
Calories of Goldfish- 170 Cal
Answer:
Goldfish
Explanation:
Because I saw the other answer.
How much energy is required to remove a neutron from the nucleus of an atom of carbon-13?
Answer:
uh i think 12?
Explanation:
I need help please on chemistry
A sample of a mixture of salt and sugar has a total mass of 0.8920 g. If the sample contains 0.0982 g of salt, what percent of the sample is sugar?
Answer:
89%
Explanation:
The computation of the sample percentage is sugar is shown below:
As we know that
The mass of the total sample mixture is
= Mass of salt + mass of sugar
= 0.8920
And, the mass of salt is 0.0982 g
So, the mass of sugar is
= 0.8920 - 0.0982
= 0.7938 g
Now the percentage of the sample is sugar is
= 0.7938 ÷ 0.8920
= 89%