Answer:
wla dyan ang sagut ehh baka mali yan
3KOH + FeCl3 → Fe(OH)3 + 3KCl
How many grams of KCl are produced when 12.5 moles of KOH completely react with excess of FeCl3?
Answer:
sry, dk
Explanation:
According to this balanced equation, how many grams of water (H.0) form in
this reaction?
Beo
2HCI
+
BeCl2
79.919
Н,0
?
25.019
72.919
A. 177.84 grams
B. 127.82 grams
C. 32.00 grams
O D. 18.02 grams
Answer:
your simpal answer is 177.32
On a warm sunny day, a deer is searching something to drink. The deer is most likely responding to which kind of stimulus?
Answer:
External stimulus of thirst
Answer:
your answer is: the external stimulus of thirst
Explanation:
I took the test :)) hope this helps!!!!!!
How many joules are required to heat 120.5!grams of water from 5.6°C to 62.5°C
Answer:
The amount of energy required is 17 kJ.
Explanation:
what is neutralisation reaction? why is it named so? give one example.
Answer:
In chemistry, neutralization or neutralisation is a chemical reaction in which acid and a base react quantitatively with each other. In a reaction in water, neutralization results in there being no excess of hydrogen or hydroxide ions present in the solution.Neutralization reactions are the reaction between acid and base. The products formed are water and salt. It is called so because the acid and base neutralize each other to form water and salt.Hint: The neutralization reaction is the one in which an acid reacts with an equimolar amount of base to give salt and water. The example could be a reaction between any strong acid and a base. The sodium chloride formed is a result of neutralization reaction.
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The solubility of gases in liquids The solubility of gases in liquids increases as temperature increases and increases as pressure increases. increases as temperature increases and decreases as pressure increases. decreases as temperature increases and decreases as pressure increases. decreases as temperature increases and increases as pressure increases. is independent of temperature and increases as pressure increases.
Answer:
As the kinetic energy of the gaseous solute increases, its molecules have a greater tendency to escape the attraction of the solvent molecules and return to the gas phase. Therefore, the solubility of a gas decreases as the temperature increases.
Explanation:
As the kinetic energy of the gaseous solute increases, its molecules have a greater tendency to escape the attraction of the solvent molecules and return to the gas phase. Therefore, the solubility of a gas decreases as the temperature increases
A gas has a volume of 1000.0 mL at a temperature of 20.OK and a pressure
of 1.0 atm. What will be the new volume when the temperature is changed
to 40.0K and the pressure is changed to
0.5 atm?
Answer:
4000mL
Explanation:
Using the combined gas law equation as follows:
P1V1/T1 = P2V2/T2
Where;
P1 = initial pressure (atm)
P2 = final pressure (atm)
V1 = initial volume (mL)
V2 = final volume (mL)
T1 = initial temperature (K)
T2 = final temperature (K)
According to the information given in this question:
V1 = 1000mL
T1 = 20K
P1 = 1.0atm
V2 = ?
P2 = 0.5atm
T2 = 40K
Using P1V1/T1 = P2V2/T2
1 × 1000/20 = 0.5 × V2/40
1000/20 = 0.5V2/40
50 = 0.5V2/40
50 × 40 = 0.5V2
2000 = 0.5V2
V2 = 2000/0.5
V2 = 4000mL
How many moles in 4.65 g of Helium?
Answer:
4.65 g x 1 mol/4.0026 g/mol = 1.162 mol helium
Explanation:
I need to know the answer to this question
Answer:
your awnser would be 72.1
Explanation:
hope this helps have a good day :]
Perform the following
mathematical operation, and
report the answer to the correct number of significant figures.
7.68 x 4.564 = [?]
Which of these is correct?
Answer:
1.89 nol Cu(NO3)2
Explanation:
if you calculate it it will be 1.89
What is the limiting reactant in a reaction where 10.0 mol of iron is treated with 12.0 mol of bromine? The product that forms is FeBr3. First, write and balance the chemical equation. Next, calculate the moles of FeBr3 that can be made from 10.0 mol of Fe. Then calculate the moles of FeBr3 that can be made from 12.0 mol of bromine. The smaller amount of FeBr3 reveals the limiting reactant.
Answer: The limiting reagent in the reaction is bromine.
Explanation:
Limiting reagent is defined as the reagent which is completely consumed in the reaction and limits the formation of the product.
Excess reagent is defined as the reagent which is left behind after the completion of the reaction.
Given values:
Moles of iron = 10.0 moles
Moles of bromine = 12.0 moles
The chemical equation for the reaction of iron and bromine follows:
[tex]2Fe+3Br_2\rightarrow 2FeBr_3[/tex]
By the stoichiometry of the reaction:
If 3 moles of bromine reacts with 2 moles of iron
So, 12.0 moles of bromine will react with = [tex]\frac{2}{3}\times 12.0=8moles[/tex] of iron
As the given amount of iron is more than the required amount. Thus, it is present in excess and is considered as an excess reagent.
Hence, bromine is considered a limiting reagent because it limits the formation of the product.
Thus, the limiting reagent in the reaction is bromine.
What is the percentage composition of each element in ammonia, NH3?
82.35% N; 17.65% H
80.55% N; 19.45% H
79.46% N; 20.54% H
78.57% N; 21.43% H
Taking into account the molar mass of each elemente and ammonia, the correct answer is the first option: the percentage composition of each element in ammonia, NH₃ is 82.35% N; 17.65% H
First of all, molar mass is the mass of one mole of a substance, which can be an element or a compound. In the case of a compound, it is calculated by adding the atomic masses of the atoms that make up the molecule.
In this case, being the atomic mass of N equal to 14 and the atomic mass of H equal to 1, the molar mass of NH₃ is calculated as:
NH₃= 14 + 3* 1= 17
Now, to obtain the percentage composition of each element, you must divide each individual atom with the mass of ammonia and multiply by 100 to obtain the percentage:
N: [tex]\frac{14}{17} x100[/tex]
H: [tex]\frac{1x3}{17} x100[/tex] In this case, the atomic mass of hydrogen H is multiplied by 3 because 3 hydrogens are present in ammonia.
Solving:
N: [tex]\frac{14}{17} x100[/tex]= 0.8235×100= 82.35 %
H: [tex]\frac{3}{17} x100[/tex]= 0.1765×100= 17.65 %
Finally, the correct answer is the first option: the percentage composition of each element in ammonia, NH₃ is 82.35% N; 17.65% H
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What does a particular point on a line of a phase diagram represent?
A. The melting point or boiling point of a substance at a specific
pressure
B. The maximum temperature a substance can exist at without
bonds breaking
C. The pressure created by the kinetic energy of molecules at a
particular temperature
D. The conditions in which temperature and pressure have equal
effects on a substance
Answer: A
Explanation:
the melting point or boiling point of a substance at a specific pressure
An electron in a hydrogen atom moves from level 1 to level 4. The electron then drops from level 4 to level 2. Which
statement describes the most likely result?
O The energy absorbed in the first move equals the energy released in the second move.
O The energy absorbed in the first move is greater than the energy released in the second move.
O The energy released in the first move equals the energy absorbed in the second move.
O The energy released in the first move is greater than the energy absorbed in the second move.
Answer:
The energy absorbed in the first move is greater than the energy released in the second move
Explanation:
Electrons require (absorb) energy to move to a higher energy level when there is a large external heat source, the presence of an electric field or by colliding with other electrons
And the amount of energy absorbed by the electron is exactly equal to the change in the energy state between the initial energy level of the electron and the destination energy level
Therefore, given that the energy level of the electron at level 2 is higher than the energy level of the electron when at level 1, we have;
The difference in the energy level between level 4 and level 1 is greater than the difference in the energy level between level 4 and level 2 and more energy is absorbed and therefore, released when the electron moves from level 1 to level 4 than when the electron drops from level 4 to level 2.
The most likely result is that 'the energy absorbed in the first move is greater than the energy released in the second move'.
Please somone help me with a chemistry question brainliest to whoever answers correctly and 20 points
Answer:
3132 is the answer
Explanation:
3BaCl2 + Al2S3 → 3BaS + 2AlCl3
Answer:
Explanation:
Hope this helps u !!
please help me thank u !
Use the reaction N2(g) + 3H2(g) 2NH3(g) to answer the following questions
a. 1 pt: What does Le Châtelier's principle predict would happen to the equilibrium conditions if N2(g) + 3H2(g) were added to the system?
b. 1 pt: What would happen to the equilibrium if the pressure were decreased?
c. 2 pts: Write the equation for calculating Keq
d. 3 pts: Calculate the value for Keq given the following concentrations
[NH3] = 6 M
[H2] = 4 M
[N2] = 3 M
Answer:
Explanation:
a ) If N₂(g) and 3H₂(g) is added to the system , 2 moles of additional ammonia will be produced .
b ) If pressure is decreased , less amount of ammonia will be formed, because forward reaction reduces the pressure. So, reaction will take place in reverse direction.
c ) Keq = [ NH₃ ] ² / [ N₂ ] [ H₂]³
d ) Substituting the given values in the equation ,
Keq = [ 6M ] ² / [ 3M] [ 4M]³
= 36 / 3 x 64 M⁻²
= 18.75 x 10⁻² M⁻² .
Name two types of silk
Answer:
Tussar silk
Charmeuse
Explanation:
Hope this helps! :)
Which is a characteristic of nuclear fission?
Answer:
Contrasting Nuclear Fission and Nuclear Fusion
Nuclear FissionByproducts of the reaction: Fission produces many highly radioactive particles.Conditions: Critical mass of the substance and high-speed neutrons are required.Energy Requirement: Takes little energy to split two atoms in a fission Explanation:
A student is provided with a sample of iron pyrite and a sample of gold. Suggest how the student could distinguish between the two substances
Answer:
Gold and pyrite both have a brilliant metallic luster, but are different tones of yellow. Gold is golden to silvery yellow, whereas pyrite is a pale to medium brassy yellow that sometimes tarnishes.
Explanation:
help bc i need it lol
Answer:
2 XE + 1 AB. --> 1 AE2 + 2 XB
Above equation is now balanced
Jello has a density of 1.14 g/mL. A box of Jello makes 475 mL of Jello and has 13 g of sugar. Determine the % m/m of sugar in the Jello. (Hint: d=m/v)
Answer:
2.34 %
Explanation:
Since the density of the Jello, ρ = 1.14 g/mL and ρ = m/v where m = mass of jello and v = volume of jello = 475 mL.
So, m = ρv
substituting the values of the variables into the equation, we have
m = ρv
m = 1.14 g/mL × 475 mL = 541.5 g
Since we have 13 g of sugar in the jello, the total mass present is 13 g + 541.5 g = 554.5 g
So, the percentage by mass of sugar present % m/m = mass of sugar present/total mass × 100 %
= 13 g/554.5 g × 100 %
= 0.0234 × 100 %
= 2.34 %
So, the percentage by mass of sugar present % m/m = 2.34 %
PLEASE HELP
If 62.6 g of lead (II) chloride is produced, how many grams of lead (II) nitrate were reacted?
Answer: The mass of lead (II) nitrate required is 74.52 g
Explanation:
The number of moles is defined as the ratio of the mass of a substance to its molar mass.
The equation used is:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)
Given mass of lead (II) chloride = 62.6 g
Molar mass of lead (II) chloride = 278.1 g/mol
Plugging values in equation 1:
[tex]\text{Moles of lead (II) chloride}=\frac{62.6g}{278.1g/mol}=0.225 mol[/tex]
The chemical equation for the reaction of lead (II) chloride and sodium nitrate follows:
[tex]Pb(NO_3)_2+2NaCl\rightarrow PbCl_2+2NaNO_3[/tex]
By the stoichiometry of the reaction:
1 mole of lead (II) chloride is produced from 1 mole of lead (II) nitrate
Then, 0.225 moles of lead (II) chloride will react with = [tex]\frac{1}{1}\times 0.225=0.225mol[/tex] of lead(II) nitrate
Molar mass of lead (II) nitrate = 331.2 g/mol
Plugging values in equation 1:
[tex]\text{Mass of lead (II) nitrate}=(0.225mol\times 331.2g/mol)=74.52g[/tex]
Hence, the mass of lead (II) nitrate required is 74.52 g
An unknown substance weighing 42.0 g was heated from 36.0°C to 65.0°C. In this process, the
substance absorbed 5895 J of energy. What is the specific heat of the substance?
A. 5895 J/(g*C)
B. 4.18 J/(g*C)
C. 4.84 J/( g*C)
D. O.06 J/(g*C)
Answer:
A. 5895 J/g*C)
Explanation:
An unknown substance weighing 42.0 g was heated from 36.0°C to 65.0°C. In this process, the substance absorbed 5895 J of energy.
Potassium (K):
g/mol?
WHAT IS A SAFE WAY TO BAKE SODA IN THE OVEN WITHOUT IT SPEWING EVERYWHERE?
put the glass lid on and turn or turn down the heat
What process takes place when hydrogen-3 and hydrogen-2 combine to form
helium-4 plus a neutron?
A. Fusion
B. Alpha decay
C. Beta decay
D. Fission
Answer:
A. Fusion
Explanation:
why metals should not be disposed in landfills
Answer:
Because metal can not decompose!
Which of the following is the strongest acid?
a.pH = 12
b.pOH = 5
c.[H+] = 1 x 10-8
d.pOH = 12
Answer:
d. pOH = 12 => pH = 14 - 10 = 2 => most acidic
Explanation:
pH = -log[H⁺] => [H⁺] = 10^-pH
By definition, if ...
[H⁺] > 10⁻⁷ > [OH⁻] => pH < -log(10⁻⁷) < 7 => pOH > 14 - 7 > 7 => acidic solution
[H⁺] = 10⁻⁷ = [OH⁻] => pH = -log(10⁻⁷) = 7 => pOH = 14 - 7 = 7 => neutral solution
[H⁺] < 10⁻⁷ < [OH⁻] => pH > -log(10⁻⁷) > 7 => pOH < 14 - 7 < 7 => basic solution
∴ From most basic to most acidic ...
a. pH = 12 => most basic
b. pOH = 5 => pH = 14 - 5 = 9
c. [H⁺] = 1 x 10⁻⁸ => pH = -log(10⁻⁸) = -(-8) = 8
d. pOH = 12 => pH = 14 - 10 = 2 => most acidic