Answer:
[tex]H_3PO_4(aq)+H_2O(l)\rightleftharpoons H_3O^+(aq)+H_2PO_4^{-}(aq); \ Ka_1[/tex]
[tex]H_2PO_4^{-}(aq)+H_2O(l)\rightleftharpoons H_3O^+(aq)+HPO_4^{-2}(aq); \ Ka_2[/tex]
[tex]HPO_4^{-2}(aq)+H_2O(l)\rightleftharpoons H_3O^+(aq)+PO_4^{-3}(aq); \ Ka_3[/tex]
Explanation:
Hello!
In this case, since the phosphoric acid is a triprotic acid, we infer it has three stepwise ionization reactions in which one hydrogen ion is released at each step, considering they are undergone due to the presence of water, thus, we proceed as follows:
[tex]H_3PO_4(aq)+H_2O(l)\rightleftharpoons H_3O^+(aq)+H_2PO_4^{-}(aq); \ Ka_1[/tex]
[tex]H_2PO_4^{-}(aq)+H_2O(l)\rightleftharpoons H_3O^+(aq)+HPO_4^{-2}(aq); \ Ka_2[/tex]
[tex]HPO_4^{-2}(aq)+H_2O(l)\rightleftharpoons H_3O^+(aq)+PO_4^{-3}(aq); \ Ka_3[/tex]
Moreover, notice each step has a different acid dissociation constant, which are quantified in the following order:
Ka1 > Ka2 > Ka3
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What is the mass of this mineral sample?
15.5 grams
55 grams
110 grams
115.5
Answer:
110
Explanation:
Explain the importance of camera focus in making good forensic pictures
Answer:
Depth of field, often called the plane of sharpness, is the area in a photograph where objects are in sharp focus. Crime scene and evidence photographs should have as much in focus as possible (a deep plane of sharpness). This is because out of focus areas of a photograph can become issues in court.
Explanation:
Hope this helps!
Convert for the following kelvin temperatures to degrees Celsius 188K 631K
Answer:
187,726.85 and 630,726.85
Why does a solid have a definite shape and volume?
A. The particles in a solid are not attracted to one another.
B. The particles in a solid vibrate around fixed locations.
C. The particles in a solid are not tightly packed.
D. The particles in a solid travel at a high speed of motion.
Answer:
B
Explanation:
The particles are bound to each other and they vibrate at an almost undetectable rate.
Which group in the Periodic Table contains elements that form ions which are larger than their atoms?
Answer:
Which group in the Periodic Table contains elements that form ions which are larger than their atoms?
The second.. . Luckily for you, I just happen to have a chart in my room.
The periodic table that contains elements that form ions which are larger than their atoms is group 2 .
Elements in group 2 of the periodic table known as alkali earth metal usually form ions that are larger than their atoms.
The elements in this group include the following;
Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba), and Radium (Ra).Thus, we can conclude that the group in the periodic table that contains elements that form ions which are larger than their atoms is group 2 .
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3.How many grams of lithium nitrate will be needed to
make 250 grams of lithium sulfate? Using the following
equation:
Pb(SO ), + 4 LINO - Pb(NO3), + 2 Li SO
4
Answer:
[tex]m_{LiNO_3}=314gLiNO_3[/tex]
Explanation:
Hello!
In this case, for the given chemical reaction:
[tex]Pb(SO_4 )_2, + 4 LiNO_3 \rightarrow Pb(NO_3)_4, + 2 Li_2 SO_4[/tex]
We can see a 4:2 mole ratio between lithium nitrate (68.946 g/mol) and lithium sulfate (109.94 g/mol); in such a way, via stoichiometry, the required mass of lithium nitrate to make 250 g of lithium sulfate turns out:
[tex]m_{LiNO_3}=250gLi_2SO_4*\frac{1molLi_2SO_4}{109.94gLi_2SO_4} *\frac{4molLiNO_3}{2molLi_2SO_4} *\frac{68.946gLiNO_3}{1molLiNO_3}\\\\m_{LiNO_3}=314gLiNO_3[/tex]
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help it is due in 15 min and i’m so confused
gas has little particles that float around but very slowly and split up all around the place
Find the number of moles of water that can be formed if you have 130 mol of hydrogen gas and 60 mol of oxygen gas.
Answer:
130 moles of water might be produced by the reaction.
Explanation:
We state the equation for production of water:
2H₂(g) + O₂ (g) → 2H₂O (l)
Moles of hydrogen: 130
Moles of oxygen: 60
We state that the limting reactant is the oxygen
For 2 moles of hydrogen, we need 1 mol of oxygen
For 130 moles of hydrogen, we would need 65 moles, and we only have 60. Ratio is 2:1
1 mol of O₂ can produce 2 moles of water
Then, 60 moles of O₂ will produce (60 . 2) /1 = 130 moles
A precipitation was formed after mixing two substance . is my question a chemical change or is not a chemical change?
Answer: It is
Explanation:
A Grignard reagent is prepared by reacting cyclopentanol with first thionyl chloride and then magnesium in ether. The Grignard reagent is then reacted with acetaldehyde (ethanal) and the reaction mixture acidified. What is the major final product of this series of reactions?
Answer:
Grignard reagent is a chemical compound having a halogen group along with magnesium and organic group.
Explanation:
When cyclopentanol reacts with thiogyl chloride, it gives chlorocyclopentane as the product which on further reaction with magnesium metal gives Grigmard reagent as the main product.
A Grignard reagent is a chemical compound which have the chemical formula of R−Mg−X. Here, R is an organic group, Mg is magnesium and X is halogen. The organic group may be aryl or alkyl.
The reaction and the final product is given below at the attachment.
what's the molecular geometry of SiCI4
Answer:
Tetrahedral shape
Explanation:
The compound SiCl₄ has a molecular geometry of a tetrahedral shape. The shape of compound can be predicted using the valence shell electron pair repulsion theory model.
The total electron pair around the central atoms is 4. The number of bond pairs is 4. Lone pair is zero.Question 9 (1 point)
For the following hypothetical reaction:
3A + 2B --> 60
How many moles of C can you produce with 4 moles of A and excess B?
(Enter just the number; not the number and units)
Your Answer:
Answer
Answer:
8 moles of C
Explanation:
From the question given above, the following equation was obtained:
3A + 2B —> 6C
From the equation above,
3 moles of A reacted to produce 6 moles of C.
Thus, the number of mole of C produced by reacting 4 moles of A can be obtained as follow:
From the equation above,
3 moles of A reacted to produce 6 moles of C.
Therefore, 4 moles of C will react to produce = (4 × 6)/3 = 8 moles of C
Thus, 8 moles of C can be obtained from the reaction of 4 moles of A with excess B
How many moles are present in 1.2L of a 0.1 M NaCl solution?
Answer:
0.12 mole.
Explanation:
From the question given above, the following data were obtained:
Molarity of NaCl solution = 0.1 M
Volume of NaCl solution = 1.2 L
Mole of NaCl =.?
Molarity of a solution is simply defined as the mole of solute per unit litre of the solution. Mathematically, it is expressed as:
Molarity = mole /Volume
Thus, we can obtain the mole of NaCl in the solution by using the above formula as follow:
Molarity of NaCl solution = 0.1 M
Volume of NaCl solution = 1.2 L
Mole of NaCl =.?
Molarity = mole /Volume
0.1 = mole of NaCl /1.2
Cross multiply
Mole of NaCl = 0.1 × 1.2
Mole of NaCl = 0.12 mole
Therefore, 0.12 mole of NaCl is present in the solution.
Testbank, Question 143 A compound with molecular formula C8H14O4 exhibits a triplet at δ 1.3 (6H), a singlet at δ 2.6 (4H) and a quartet at δ 4.2 (4H) in its 1H NMR spectrum. Its IR spectrum shows a strong absorption band near 1740 cm-1. What is the structure for this compound
Answer: fun fact an apple onion and potatoe all taste the same if you plug your nose
Explanation:
12. True or False: Objects with balanced forces acting upon them may be at rest.
Answer:
True
Explanation:
I think the answer is true
what is the weight of calcium oxide obtained from igniting 3.2g of calcium oxalate
Answer:
1.4 g
Explanation:
Step 1: Write the balanced combustion reaction
CaC₂O₄ + 1/2 O₂ ⇒ CaO + 2 CO₂
Step 2: Calculate the moles corresponding to 3.2 g of CaC₂O₄
The molar mass of CaC₂O₄ is 128.10 g/mol.
3.2 g × 1 mol/128.10 g = 0.025 mol
Step 3: Calculate the moles of CaO formed from 0.025 moles of CaC₂O₄
The molar ratio of CaC₂O₄ to CaO is 1:1. The moles of CaO formed are 1/1 × 0.025 mol = 0.025 mol.
Step 4: Calculate the mass corresponding to 0.025 moles of CaO
The molar mass of CaO is 56.07 g/mol.
0.025 mol × 56.07 g/mol = 1.4 g
This volcano is surrounded by water. When the lava hardens, what landform will you see.
What parts of the body make up the immune system?
Answer:
The immune system is made of lungs, liver, intestine, bone marrow, tonsils, adenoids.Spleen, appendix, lymph nodes, and nodes.
Explanation:
Plzz help
its science
The efficiency : 95%
Further explanationEfficiency : the ratio between output and input work
In general, the value of the output of a machine is less than the value of the input because of the frictional force in the machine.
The greater the efficiency of the engine, the better the machine
Can be formulated :
[tex]\tt E=\dfrac{W_{out}}{W_{in}}\times 100\%[/tex]
w output = 190 J
W input = 200 J
The efficiency :
[tex]\tt E=\dfrac{190}{200}\times 100\%=95\%[/tex]
You throw a 2-kg rock with a force of 10 N. What is the acceleration of the rock?
Answer:
5 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
f is the force
m is the mass
From the question we have
[tex]a = \frac{10}{2} \\ [/tex]
We have the final answer as
5 m/s²Hope this helps you
How are the formulas for ionic and covalent compounds determined?
Answer:
Pause the video to take as much time as needed. Pause it to create more wait-time to answer questions before I move on. One of the best ways to learn is to quiz yourself as you go along.
Explanation:
The ionic compound and covalent compound can be easily determined by electronegativity difference.
What is ionic compound?If the compound will be formed by transferring the electrons then such kind of compound or molecule will be considered as ionic compound.
What is covalent compound?If the compound will be formed by sharing the electrons then such kind of compound or molecule will be considered as covalent compound.
It is easy to know the nature of compound like ionic or covalent . If the electronegativity difference of given molecule lies between 0 to 2.1 then molecule will be covalent compound. If electronegativity difference will be greater than 2.1 then compound will be ionic compound.
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0.448 g of an unknown diprotic acid is dissolved in about 60 mL of water in a beaker. The solution is transferred to a 100.00 mL volumetric flask, which is then filled up to the mark. The solution is mixed by inverting multiple times.
25.00 mL of this solution is then transferred to an Erlenmeyer flask for the titration. What mass of the diprotic acid is in the 25.00 mL that is transferred?
According to the Question:
We initially had 0.448 grams of the unknown diprotic acid, which was added to about 60 mL of water and that solution was added to a 100 mL flask and filled to the 100 mL mark
The above is as mentioned in the question, our 0.448 grams of diprotic acid is basically diluted to 100 mL [it's volume has been increased to 100mL]
but the amount of the acid is still the same
Which means that we now have 0.448 grams of the diprotic acid in a 100mL solution
Percent of the diprotic acid that will be present in the Erlenmeyer Flask:
From this 100 mL solution, 25 mL is transferred to the Erlenmeyer Flask
Which means that (25/100) * 100 = 25 % of the 0.448 grams of diprotic acid is present in the 25 mL sample
Mass of di-protic acid in the 25 mL solution:
Since 25% of the initial amount remains in the final solution,
Mass of the diprotic acid in the final solution = 0.448 * 0.25
Mass in the final solution = 0.112 grams
Therefore, 0.112 grams of the di-protic acid will be present in the Erlenmeyer Flask
need the answer ASAP
Answer:
d
Explanation:
Do you think it might be efficient for an industry to be monopolistically competitive rather than perfectly competitive?defend your answer.
Answer:
Because a good is always priced higher than its marginal cost, a monopolistically competitive market can never achieve productive or allocative efficiency. ... Because monopolistic firms set prices higher than marginal costs, consumer surplus is significantly less than it would be in a perfectly competitive market.
Explanation:
I think
A monopolistically competitive market can never achieve productive or allocative efficiency since a good is always priced higher than its marginal cost. In monopolistically competitive businesses, suppliers will underproduce.
What is efficiency ?Efficiency is the ability to achieve something or get a desired outcome without wasting resources, time, money, energy, or effort. In a broader sense, it is the capacity to carry out tasks effectively, efficiently, and without wasting time.
Due to the fact that it does not produce at the minimum of its average cost curve or where P = MC, a monopolistically competitive firm is inefficient. As a result, a firm that is monopolistically competitive would typically produce less at a greater cost and charge a higher price than a firm that is perfectly competitive.
Thus, In monopolistically competitive businesses, suppliers will underproduce.
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Why was the weight of the fire snake slightly less after it was lit on fire
Answer:
Why did the fire snake weigh a little bit less than the ingredients it came from? When Zoe weighs the ingredients (sugar and baking soda), it weighs 25 grams in total. When she weighs the “snake” it weighs 23 grams. This is because some carbon dioxide gas produced during the chemical reaction escapes into the air
Brainliest
maybe
Amplitude measures the light's
Select one:
a. frequency
b. equilibrium
c. wavelength
d. intensity
Answer:
d.) intensity
Explanation:
What kind of energy transfers between molecules of touching substances during conduction
Answer:
heat energy
Explanation:
Conduction is the transfer of heat energy from one substance to another or within a substance.
If the bark is stripped off a tree, the tree will
Answer:
may die depending on how completely it was girdled.
Explanation:
A.) A student titrated a 15.00-mL sample of a solution containing a weak, monoprotic acid with NaOH. If the titration required 17.73 mL of 0.1036 M NaOH to reach the equivalence point, calculate the concentration (in M) of the weak acid in the sample.
B.) If the sample solution described in A). contained 0.1845 g of the Weak Acid, calculate the molar mass (in g/mol) of the weak acid.
Answer:
A) 0.1225 M
B) 100.4 g/mol
Explanation:
Step 1: Write the generic neutralization reaction
HA(aq) + NaOH(aq) ⇒ NaA(aq) + H₂O(l)
Step 2: Calculate the reacting moles of NaOH
17.73 mL of 0.1036 M NaOH react. The reacting moles are:
0.01773 L × 0.1036 mol/L = 1.837 × 10⁻³ mol
Step 3: Calculate the reacting moles of HA
The molar ratio of HA to NaOH is 1:1. The reacting moles of HA are 1/1 × 1.837 × 10⁻³ mol = 1.837 × 10⁻³ mol.
Step 4: Calculate the molar concentration of HA
1.837 × 10⁻³ moles of HA are in a 15.00 mL volume. The molar concentration is:
M = 1.837 × 10⁻³ mol / 0.01500 L = 0.1225 M
Step 5: Calculate the molar mass of HA
1.837 × 10⁻³ moles of HA weigh 0.1845 g. The molar mass of HA is:
0.1845 g / 1.837 × 10⁻³ mol = 100.4 g/mol
A list of all parts and materials needed to assemble one unit of a product is called:________.
a. a master schedule.
b. a kanban.
c. an inventory record file.
d. a bill of materials.
Answer:
(d ) . A bill of materials.
Explanation:
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