Answers
1.6 x 10⁸ : 8 x 10¹¹
1.6 : 8 = 0.2
10⁸ : 10¹¹ = 10⁻³
= 0.2 x 10⁻³ = 2 x 10⁻⁴
Related Questions
What is the mass percent of a sugar solution when 489 grams of sugar is combined with 877 grams of water?
Answers
oxidation of Nitrogen in N2O3
Answers
Explanation:
oxidation of Nitrogen in N2O3 is +3
4.8 moles of Kl are dissolved in 850 mL of water. What is the molarity of the solutions?
Answers
Molarity = 4.8/850 x 1000 =5.647mol/lit or 5.65M
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6. How much of 0.25 M KI solution, in liters, is required to completely precipitate all the Pb²+ in
0.125 L of 0.75 M Pb(NO3)2?
2 KI + Pb(NO3)2 → Pbl₂ + 2 KNO3
Please help me
Answers
If we write the equation of the reaction that will take place, it is:
2HNO₃ + Na₂CO₃ → 2NaNO₃ + H₂CO3
The molar ratio of 2HNO₃ : Na₂CO₃ = 1 : 2
Therefore, we can set up the equation:
M₁V₁ = 2M₂V₂
Where the left side of the equation has the molarity and volume of HNO₃ and the right side has the molarity and concentration of Na₂CO₃. Substituting:
M₁ = (2 x 0.108 x 35.7) / 25
M₁ = 0.308
The amount of 0.25 M KI solution is needed is 0.38 L.
What is solution?Solution is defined as a homogeneous mixture of two or more substances in relative amounts that can be continually altered up to what is known as the limit of solubility.
It can also be defined as a combination of one substance dissolved in another with the same properties throughout.
The solution can be homogenous or heterogenous mixture.
2 KI + Pb(NO3)2 → Pbl₂ + 2 KNO3
As per the reaction
The ratio is KI : Pb(NO3)2 is 1:1
So, we use M1V1 = M2V2
As given, M1 = 0.25 M
M2 = 0.75 M
V2 = 0.125 L
So, V1 = M2 V2 / M1
V1 = 0.75 x 0.125 / 0.25
V1 = 0.38 L
Thus, the amount of 0.25 M KI solution is needed is 0.38 L.
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What volume of 0.194 MNa3PO4 solution is necessary to completely react with 85.5 mL of 0.109 MCuCl2 ?
Answers
Answer:
35.9 ml
Explanation:
Start with the balanced equation:
3CuCl2(aq)+2Na3PO4(aq)→Cu3(PO4)2(s)+6NaCl(aq)
This tells us that 3 moles of CuCI2 react with 2 moles Na3PO4-
∴ 1 mole CuCl2 will react with 2/3 moles Na3PO4
We know that concentration = moles/volume i.e:
c= n/v
∴n=c×v
∴nCuCl2=0.107×91.01000=9.737×10−3
I divided by 1000 to convert ml to L
∴nNa3PO4=9.737×10−3×23=6.491×10−3
v=nc=6.491×10−30.181=35.86×10−3L
∴v=35.86ml
which of the following is an example of gentic engineering?]
A. A string of animo acids bonded together to form a protein that controls a trait
B. In the nucleus of a human cell, DNA strands sepreate and are used as a template for a new RNA molecule.
C. A string of three bases within an RNA molecule codes for a specific anmio acid.
D. A bacterial cell produce human insullian because human DNA has been added to the bacterial DNA.
Answers
Which statement describes thermal energy?
the energy that is associated with electric fields
the energy that is stored in chemical bonds
the energy that is associated with the pull of gravity
the energy that is associated with temperature
Answers
Answer:
"the energy that is associated with temperature" ✔️
Explanation:
Thermal Energy = Heat
Ex: The sun has thermal energy.
Ex: The oven radiates thermal energy
I hope this helps, you understand!!
The statement describes thermal energy is as
the energy that is associated with temperature.So, option D is correct one
What is the thermal energy?The energy posses by the particles or system due to their temperature is called thermal energy.
Thermal energy is produced when the atoms and molecules vibrate faster because of rise in temperature.The thermal energy cannot be converted into useful work.The source of thermal energy is fossil fuel like natural gas, coal and oil . The solar heat, electric heat, geothermal heat and heat pump are also sources of thermal energy.The simple example of thermal energy is boiling of water on stove.To learn more about thermal energy here.
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Determine weather each of the following will be saturated or unsaturated at 50 degree celcious
Answers
The solubility of the solutes in the solution will determine whether each of the solutions will be saturated or unsaturated at 50 degree celcius.
What are saturated and unsaturated solutions?Saturated solutions are solutions which contains as much solute as they can dissolve at that temperature in the presence of undissolved solute.
An unsaturated solution is a solution which contains less solute than it can dissolve at that temperature.
The solubility of a solute determines whether its solution will be saturated or unsaturated at a given temperature.
Therefore, the solubility of the solutes in the solution will determine whether each of the solutions will be saturated or unsaturated at 50 degree celcius.
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I will mark brainliest
Answers
The equation which is balanced is S₈ + 12O₂ → 8SO₃.
What is balance reaction?Balanced reactions are those reactions in which all entities are present on the reactant side as well as on the product side of the reaction.
6S₈ + 8O₂ → 6SO₃Above equation is unbalanced as all atoms are not present in same amount.
2S₈ + 3O₂ → 2SO₃Above equation is unbalanced as all atoms are not present in same amount.
S₈ + 12O₂ → 8SO₃Above equation is balanced as all atoms are present in same amount on reactant side as well as product side.
S₈ + 24O₂ → 8SO₃Above equation is unbalanced as all atoms are not present in same amount.
Hence, S₈ + 12O₂ → 8SO₃ is a balanced equation.
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Differentiate the three pictures and explain them briefly.
Answers
Answer:
answer
Cold Front - a zone separating two air masses, of which the cooler, denser mass is advancing and replacing the warmer.
Warm Front - a transition zone between a mass of warm air and the cold air it is replacing.
Stationary Front - a front between warm and cold air masses that is moving very slowly or not at all.
As the temperature of a gas increases, the volume of the gas will______ if the pressure remains the same
Answers
Answer:
increasesExplanation:
The volume of the gas increases as the temperature increases. As temperature increases, the molecules of the gas have more kinetic energyAnswer:
Explanation: stay the same
Chemical Reactions
Substances in a fire extinguisher help prevent air from reaching a burning material. Why would this be a good way to fight a fire?
Answers
Answer:
It works by separating the fuel from the oxygen. The oxygen comes from the air. It is the same oxygen we breathe. Since the oxygen has to be in contact with the fuel, if you can coat the fuel with something that keeps the oxygen away, the fire will go out which is what the fire extinguisher does.
WILL GIVE BRAINLIEST!!!!! - The diagram below shows the movement of Earth plates.
Which of these features is most likely formed as a result of the movement of Earth plates shown in the diagram?
A - A Mountain
B - A Canyon
C - A Fault
D - A Ridge
Answers
Answer:
A a mountain
Explanation:
this is becuase the two plates are pushing into each other, so all that rock will go where theres the least resistance, up
you can see this when you place your hands (palms down facing each other where the tis touch) on a table or flat surface, if you slowly bring them together ((DONT DO IT HARD OR FAST else u may hurt urself)) your fingertips will begin to want to rise up
the answer is not B becuase:
a canyon is formed when erosion carves into the earth, this oes NOT need to happen at a fault line and deffinitally does not happen n converging plates as shown
the answer is not D becuase:
a ridge is formed when ne plate pushes under the other, pushing that second plate upward, when this happens it forms a chain of mountains, though this is simmilar to the correct answer, the diagram does not show the plates undernieth one another, rather they are pushing against each other
the answer is not C becuase:
a fault is where two plates are moving away from each other, creating a canyon like structure, this is not a canyon however, for it is not formed by erosion, most faults can be found underwater since oceans usually fill in the gap where rock used to be
hope this helps you, sorry if its a lot of reading ^^"
Which statement illustrates the difference between a chemical reaction and a nuclear reaction?
a. A nuclear reaction releases more energy per gram and appears to violate the law of conservation of mass.
b. A nuclear reaction releases less energy per gram and appears to violate the law of conservation of mass.
c. A nuclear reaction releases more energy per gram but does not appear to violate the law of conservation of mass.
d. A nuclear reaction releases less energy per gram but does not appear to violate the law of conservation of mass.
Answers
Some main differences between the chemical and nuclear reactions are:
- The nuclear reaction releases more energy per gram.
- The nuclear reaction takes place in the nucleus of the atom.
- In the nuclear reaction, part of the mass is converted into energy, which violates the law of conservation of mass.
Oxidation state of Nitrogen in NO ?
Answers
Explanation:
Oxidation state of Nitrogen in NO is +2
Answer:
+2
Explanation:
What is 0.0032 gallons in mL?
Answers
Answer:
14.547 ml
Explanation:
1 gallon= 4546.09 ml
write the action of aqua regia on gold
Answers
Answer:For alloys greater than 14 K, aqua regia is used to test the gold. Aqua regia dissolves gold itself (as well as dissolving the silver and copper components) and for this reason it is used to test higher karat gold alloys.
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If 0.15M solution of HNO2 has a pH of 1.98, determine the % ionization of HNO2.
Answers
The % ionization of HN0₂ is 6.98 %
What is percentage Ionization ?
The relative strengths of acids may be determined by measuring their equilibrium constants in aqueous solutions.
In solutions of the same concentration, stronger acids ionize to a greater extent, and so yield higher concentrations of hydronium ions than do weaker acids.
Percentage Ionization is the measure of the strength of an acid is its percent ionization.
The percent ionization of a weak acid is the ratio of the concentration of the ionized acid to the initial acid concentration, times 100:
The chemical equation for the dissociation of the nitrous acid is:
HNO₂(aq)+H₂O(l)⇌NO²⁻(aq)+H₃O⁺(aq).
[tex]\rm \% \;ionization = \dfrac{[H_{3}O^{+} ] _{eq} }{[HNO_{2}]_{0} } \times 100[/tex]
[tex]\rm 10^{-pH} =[/tex] [H₃O⁺] ,
we find that with given pH of 1.98
[tex]10^{-1.98} =[/tex] 0.01047128548 M=[H₃O⁺]
Molarity of HN0₂ = 0.15 M
so that percent ionization is
[tex]\% ionization = \dfrac{0.01047128548 }{0.15 } \times 100[/tex]
[tex]\% ionization = 6.98 \%[/tex]
Therefore the % ionization of HN0₂ is 6.98 %
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Scientific knowledge can withstand the test of time because
A.
scientific theories have been proven beyond doubt.
B.
advancements in technology have no impact on science.
C.
exceptions can be made regarding scientific laws.
D.
it is open to change as new evidence or data is discovered.
Answers
Answer:
D
Explanation:
36.4 g of SnCl2 is dissolved in 135.7 mL of water.
Molar mass of SnCl2 = ____ g/mol
Liters of solution = ___ L
What is the concentration of this solution? ____ M (Answer with 3 significant figures)
Answers
Answers:
1st: 189.6 g/mol
2nd: 0.1357 L
3rd: 1.41 M
Explanation:
Finding Molar Mass:
SnCl2 = Tin(II) Chloride
Tin has a molar mass of 118.71 g/mol
Chloride has a molar mass of 35.453 g/mol
Chloride*2 = 70.906
118.71 + 70.906 ≈ 189.6 g/mol
Finding Liters of Solution:
L = mL/1000
135.7 mL / 1000 = 0.1357
Finding Molarity:
molarity = moles of solute / liters of solution
M = (36.4g / 189.6g) / 0.1357 L = 1.41 M
Hope this helped ;)
If you were to look up at the moon and see the shape of the moon as a circle, what would the next observable shape in the cycle of the moon be? (2 points)
Group of answer choices
Crescent
Full circle
Half circle
Answers
Answer:
Half circle
Explanation:
because in the next day between 5O'clock the sun will rise then the moon will therefore created to be in a half moon
A solution is made by mixing 50.0 mL of liquid A with 75.0 mL of liquid B. Which is the solute, and which is the solvent? Is it valid to assume that the volume of the resulting solution will be 125 mL? Explain your answer.
Answers
If two liquid solutions are mixed together, the solute would be the one with the lower volume while the solvent would be the solution with the higher volume.
What are liquid solutes?The mixing of two liquids requires that one is a solute while the other is a solvent.
Thus, the solution with the higher volume acts as the solvent while the one with the lower volume act as the solute.
For example, a solution made by mixing 25% water with 75% alcohol has water as the solute and alcohol as the solvent.
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How many moles of gas are in a 30-liter scuba canister if the temperature of the canister is 300 K and the pressure is 15,200 torr?
Answers
Answer:
n = 0.487⋅mol
Explanation
n=PVRT
=0.4⋅atm×30⋅L0.0821⋅L⋅atm⋅K−
1⋅mol−1×300⋅K
=0.487⋅mol
A 4.3 L gas bubble at STP is heated to 984 K, and the pressure increases to 1520 mmHg. What is the new volume?
Answers
Answer:
v2=40.35L
Explanation:
p1v1/t1=p2v2/t2
v2=t2p1v1/t1p2
v2=984*760*22.4/273.15*1520
v2=40.35 L
Which two options describe behaviors of particles that are related to the chemical properties of the materials?
Answers
Answer:
easily forming bonds w/ atoms of other elements and combining w/ oxygen atoms to form new substance
What is the correct fomula of salt
Answers
Answer:
NaCl
Explanation:
Answer:
NACL
|•ANSWER,•|.....
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Which is the most likely to be reduced?
O A. Cu²+
OB. Zn²+
OC. Ni2+
OD. Fe²+
Answers
Answer: C
Explanation:
Zinc is the most active metal among the options.
Ni²⁺ is most likely to be reduced. Therefore, the correct option is option C among all the given options.
What is reduction?In a half-reaction known as reduction, a chemical species lowers its oxidation number, typically by acquiring electrons. Oxidation, which results in the loss of electrons, makes up the reaction's other half. Redox reactions are formed when reduction and oxidation work together (reduction-oxidation equals redox).
You could think of reduction as the antithesis of oxidation. Oxidation and reduction in some reactions can be thought of as the transfer of oxygen. Here, oxygen is gained by oxidation while it is lost through reduction. Ni²⁺ is most likely to be reduced.
Therefore, the correct option is option C. Ni²⁺ is most likely to be reduced.
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Can someone please answer this.
Answers
please if anyone knows the answer solve it on the paper with DATA, SOLUTION and RESULT then attach the photo here
The question is:
Calculate the molecular mass (a.m.u) of C2H5OH.
I'll be very thankful to you
Answers
The compound is ethanol
Commercial agriculture can often lead to water-quality problems. In one to two sentences, explain how two of those problems occur.
Answers
Commercial agriculture often leads to water-quality problems as a result of run-offs and agrochemical discharge.
How do water-quality problems occur in agriculture?Most commercial agriculture requires the use of agrochemicals and fertilizers.
Agrochemicals such as insecticides and herbicides are poisonous to aquatic biodiversity when run-offs are discharged from farmlands to water bodies.
Fertilizer run-offs into water bodies also cause nutrient enrichment, leading to eutrophication.
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