Answers
Answer:
what is the topic
Explanation:
Related Questions
Concentration and ion moles are equal only when volume is what ?
Answers
Concentration and ion moles are equal only when volume is 1. Of 1.0 x 10-6 and 1.0 x 10-4, the larger number is 1.
The concentration of ions in a solution depends on the mole ratio. The molarity is the moles per solute upon the value of the solution. The official symbol of molarity is the concentration (c)
The concertation is the ratio or the amounts of solute per amount of solution. Molarity is the unit of concentration that relates to the number of moles solute per liter of solution. Molarity is moles of solute / 1Lt of solution. Moles are equal only when the volume is indirectly proportional to the solution.Learn more about the concentration and ion moles that are equal.
brainly.com/question/23314887.
Given the reaction that occurs in an electrochemical cell:
Zn(s) + CuSO4(aq) ZnSO4(aq) + Cu(s)
During this reaction, the oxidation number of Cu changes from
A) 0 to +2
B) 0 to –2
C) +2 to 0
D) –2 to 0
Answers
Answer:
c) +2 to 0
Explanation:
SO4 has a charge of -2, so the Cu attached to that has to be a +2 since the polyatomic molecule has no overall charge
Cu(s) is a solid metal and they have no charge, therefore it is zero
Copper undergoes Oxidation (gain of electrons)
c) +2 to 0
explanation
Select the correct answer.
In which location would a free neutron from a decaying U-235 atom be most likely to cause another atom to split?
OA
in a sample of naturally occurring uranium
B.
in a sample of enriched uranium
O C.
in a sample of rock or soil
D.
in the Sun's core
E.
in a distant star
Answers
Answer:
B. in a sample of enriched uranium
Explanation:
Decaying of U-235 atom is a process of nuclear fission. In this process a neutron is bombarded on U-235 and the uranium atom captures the neutron and divide immediately to release neutron. With the release of one neutron another nuclear fission process starts.
The free neutron is then split in a sample of enriched uranium because splitting nucleus releases high energy and enrich uranium increases the percentage of uranium-235 which further undergoes fission. This is why enrich uranium samples are used in atomic reactors.
Hence, the correct option is B.
What is the molarity of a 0.51 L solution with 5.61 moles of lithium chloride?
plz help asap
Answers
Answer:
The molarity is 11 [tex]\frac{moles}{liter}[/tex]
Explanation:
Molarity is a measure of the concentration of a solute in a solution that indicates the amount of moles of solute that appear dissolved in each liter of the mixture.
The molarity of a solution is calculated by dividing the moles of the solute by the liters (volume) of the solution:
[tex]Molarity=\frac{number of moles of solute}{solution volume}[/tex]
Molarity is expressed in units ([tex]\frac{moles}{liter}[/tex]).
In this case:
number of moles of solute= 5.61 molessolution volume= 0.51 litersReplacing:
[tex]Molarity=\frac{5.61 moles}{0.51 liters}[/tex]
Solving:
Molarity= 11 [tex]\frac{moles}{liter}[/tex]
The molarity is 11 [tex]\frac{moles}{liter}[/tex]
5.77 g of nitrogen react with excess hydrogen producing 6.83 g of ammonia what is the percent yield. Determine/Label the actual yield, theoretical yield, and the percent yield for the reaction. N2+3H2=2NH3
Answers
Answer:
Percentage yield is 41.21%
Explanation:
Equation of reaction,
N₂ + 3H₂ → 2NH₃
Actual NH3 = 6.83g
Mass of N2 = 5.77g
Theoretical yield = ?
5.77g of N2 = 6.83g of NH3
14g of N2 = xg
X = (14 × 6.83) / 5.77
X = 95.62 / 5.77
X = 16.57g of NH3
Theoretical yield of NH3 is 16.57g
Percentage yield = (actual yield / theoretical yield) × 100
% yield = (6.83 / 16.57) × 100
% yield = 0.4121 × 100
% yield = 41.21%
The percentage yield of NH3 is 41.21%
PLEASE HELP
Why do atoms form bonds with other atoms? Provide example using octet rule
Answers
Answer:
For Covalent bonds, atoms tend to share their electrons with each other to satisfy the Octet Rule. It requires 8 electrons because that is the amount of electrons needed to fill a s- and p- orbital (electron configuration); also known as a noble gas configuration
Explanation:
What is the term used to describe the number of protons plus the number of neutrons in an atom?
Answers
Answer:
The atomic number is the number of protons in an element, while the mass number is the number of protons plus the number of neutrons.
Explanation:
The Moon and stars seem to move from _____________________________ to __________________________________ across the night sky.
Answers
they seem to move from east to west
ˢᵒʳʳʸ ᶦᶠ ᶦᵗˢ ʷʳᵒⁿᵍ
which sequence ranks the chemical reactions in order from fastest to slowest
Answers
Answer:
Its C
Explanation:
Just did it
Which of the following statements describes all the variables in an experiment?
A.
All variables are measured to provide data for the experimental results.
.
B.
All variables are kept the same from one part of the experiment to another.
OC.
All variables affect the results of the experiment.
O
D.
All variables are changed from one part of the experiment to another.
Answers
Answer:
Answer is C
Explanation:
All the variables can affect the results in an experiment
1. How does the molecular property of water affect its cohesive properties?
Answers
Answer:
Water molecules have strong cohesive forces thanks to their ability to form hydrogen bonds with each other.
Explanation:
Cohesion refers to the attraction of molecules by other molecules of the same type.
The structure of the water molecule is given by two hydrogen atoms and one oxygen atom that are held together by covalent bonds. It is a polar molecule and consequently forms bonds called hydrogen bonds with other molecules.
Arc AB is One-sixth of the circumference of a circle. What is the radian measure of the central angle?
A.)StartFraction pi over 6 EndFraction
B.)StartFraction pi Over 3 EndFraction
C.)StartFraction 2 pi Over 3 EndFraction
D.)StartFraction 5 pi Over 6 EndFraction
THE ANSWER IS B!!!
Answers
Answer:
?
Explanation:
Explain how the presence of copper atoms can produce an alloy stronger than pure gold
Answers
Answer:
Alloying metal lattice is intruded with strong metal atoms to provide it strength and enhance its durability
Explanation:
Mixture of two substances with an objective of improving the properties of any one of the elements is called an alloy. In the case of gold, Gold is alloyed with copper to enhance its flexibility, toughness and hardness. It can also be alloyed with range of metals including silver, copper, platinum, palladium, and zinc.
Pure gold is extremely soft for practical use. Copper also enhance the malleability and ductility of gold metal.
What factor is responsible for keeping the inner core in a solid state?
O A. High temperature
OB. High pressure
O c. Strong magnetism
O D. Strong electricity
SUBMIT
Answers
Answer:B should be the right answer “High pressure”
Explanation:
Copper and silver are two examples of atoms that will form a(n)
metallic bond
ionic bond
covalent bond
none of the above
Answers
Answer:
covalent bond is the answer
Answer:
covalent bond
That's your answer!!
According to most scientists, cold fusion
will not be a practical source of energy on Earth.
would be a practical source of energy on Earth if it were less expensive.
will be a practical source of energy on Earth within the next few decades.
will always continue to be a practical source of energy on Earth.
Answers
Answer
A IS THE ANSWER
Explanation:
A: will not be a practical source of energy on Earth.
According to most scientists, cold fusion will not be a practical source of energy on Earth.
What is cold fusion?Cold fusion is a hypothesized type of nuclear reaction that would occur at, or near, room temperature. It is usually regarded as the non practical source of energy on earth.
Thus, according to most scientists, cold fusion will not be a practical source of energy on Earth.
Learn more about cold fusion here: https://brainly.com/question/1311669
#SPJ2
Why do we not have solar and lunar eclipses every month?
Answers
Answer:
The moon's path around Earth is tilted compared to Earth's orbit around the sun. The moon can be behind Earth but still get hit by light from the sun. ... This is why we don't get a lunar eclipse every month.
Explanation:
Answer:
Explanation:
Because the sun only overlaps the moon once every 2-3 years
Instructions
Look up(search for) the following words and learn to spell:
1. Incinerator.
2. Compositing.
3. Emission.
4. Biodegradable refuse.
5. Non-biodegradable refuse.
Answers
Answer:
What’s the question??
Explanation:
Answer:
Theres not a question for us to answer...
How many Oxygen elements are in a carboxylic acid
Answers
Answer:
Carboxylic acid, any of a class of organic compounds in which a carbon atom is ... to an oxygen atom by a double bond and to a hydroxyl group by a single bond. ... sour-milk products) and citric acid (found in citrus fruits), and many keto acids ...
Explanation:
Answer:
There a 2 oxygen elements in a carboxylic acid.
Explanation:
Coal is burned in the atmosphere to release energy. Which gas is needed for burning to take place?
Answers
Answer:
Oxygen gas is needed for burning to take place.
Explanation:
I don't say you have to mark my ans as brainliest but if it has really helped you plz don't forget to thank me...
Why the southern hemisphere experiences summer when the northern hemisphere experiences winter.
Answers
Answer:
Northern hemisphere and southern hemisphere are two poles of the earth that are responsible for a different environment.
Explanation:
Theses both hemispheres have different climate at its poles. This happened because of pf the tilt of the earth. on the axis. When the northern pole gets tilt towards the sun it gets to summer.
The northern poles get sarcastically hotter season. So that when the northern pole is hotter the southern pole gets cooler at that time. All has happened because the earth gets tilted towards its poles or axis.
Help me please for brainliest and 10 points.
Answers
Answer:
The red arrow from igneous to sedimentary rock
Explanation:
When rocks are weathered and eroded, they become sediment. This sediment is later compacted and cemented to form sedimentary rock. Therefore, the red arrow going from igneous rock to sedimentary rock represents weathering and erosion.
When a radioactive decay occurs what is released?
A. Only protons and neutrons
B. Only electrons
C. Protons/Neutrons, beta particle, gamma ray
D. Only gamma rays
Answers
When a radioactive decay occurs, protons/neutrons, alpha/beta particles and gamma rays are all released depending on the type of decay.
The particle picture is best described as
a) a liquid compound
b) a liquid element
c) a solid element
d) a solid compound
e) a liquid mixture
Answers
An aqueous solution of sodium thiosulfate releases heat when it crystallizes. What would happen when sodium thiosulfate crystals dissolve in water?
Answers
Answer:
An excellent experiment is to heat sodium thiosulfate in a water bath. The solid crystals will dissolve into the water in the hydrated crystals forming a supersaturated solution. ... Placing a small crystal in the supersaturated solution will cause the liquid to turn solid.
Calculate the molality, freezing point, and
boiling point for each of the following water
solutions of nonionizing solutes:
1) 144 g of C6H1206 dissolved in 1000 g of H20
Answers
Answer: 1044
Explanation:
a hurricanes energy comes from
Answers
Answer:
Heat and water.
Explanation:
Increased evaporation means more water vapor in the air and more energy ready to be liberated in the hurricane's thunderstorms as water vapor condenses.
If 12.5 grams of strontium hydroxide is reacted with 150 mL of 3.5 M carbonic acid, identify the limiting reactant.
Answers
Answer:
Sr(OH)2
Explanation:
We'll begin by calculating the number of mole of carbonic acid in 150mL of 3.5 M carbonic acid solution. This is illustrated below:
Molarity = 3.5M
Volume = 150mL = 150/1000 = 0.15L
Mole of carbonic acid, H2CO3 =..?
Mole = Molarity x Volume
Mole of carbonic acid, H2CO3 = 3.5 x 0.15 = 0.525 mole.
Next, we shall convert 0.525 mole of carbonic acid, H2CO3 to grams.
Mole of H2CO3 = 0.525 mole
Molar mass of H2CO3 = (2x1) + 12 + (16x3) = 62g/mol.
Mass of H2CO3 =..?
Mass = mole x molar mass
Mass of H2CO3 = 0.525 x 62 = 32.55g
Next, we shall write the balanced equation for the reaction. This is given below:
Sr(OH)2 + H2CO3 → SrCO3 + 2H2O
Next, we shall determine the mass of Sr(OH)2 and H2CO3 that reacted from the balanced equation. This is illustrated below:
Molar mass of Sr(OH)2 = 88 + 2(16 + 1) = 88 + 2(17) = 122g/mol
Mass of Sr(OH)2 from the balanced equation = 1 x 122 = 122g
Molar mass of H2CO3 = (2x1) + 12 + (16x3) = 62g/mol.
Mass of H2CO3 from the balanced equation = 1 x 62 = 62g.
From the balanced equation above, 122g of Sr(OH)2 reacted with 62g of H2CO3.
Finally, we shall determine the limiting reactant as follow:
From the balanced equation above, 122g of Sr(OH)2 reacted with 62g of H2CO3.
Therefore, 12.5g of Sr(OH)2 will react with = (12.5 x 62)/122 = 6.35g.
We can see evidently from the calculations made above that it will take 6.35g out 32.55g of H2CO3 to react with 12.5g of Sr(OH)2. Therefore, Sr(OH)2 is the limiting reactant and H2CO3 is the excess reactant
Answer:
Strontium hydroxide.
Explanation:
Hello,
In this case, the undergoing chemical reaction is:
[tex]Sr(OH)_2+H_2CO_3\rightarrow SrCO_3+2H_2O[/tex]
Thus, the first step is to compute the moles of both strontium hydroxide (molar mass = 121.63 g/mol) and carbonic acid given the mass and volume and concentration respectively:
[tex]n_{Sr(OH)_2}=12.5gSr(OH)_2*\frac{1molSr(OH)_2}{121.63gSr(OH)_2} =0.103molSr(OH)_2\\\\n_{H_2CO_3}=3.5mol/L*0.150L=0.525molH_2CO_3[/tex]
Therefore, as they are in a 1:1 molar ratio in the chemical reaction, the same moles of both strontium hydroxide and carbonic acid must react, nevertheless, there are more moles of carbonic acid, for that reason, the limiting reactant is strontium hydroxide.
Best regards.
Speed is calculated by taking
divided by time.
Save and Exit
Next
Submit
Mark this and return
Answers
Answer:
Look speed is calculated by using formula
Speed(s)=distance travellelled (d) / total time taken (t)
s=d/t
It's unit is m/s
is going from gas to plasma a chemical change?
Answers
Answer:
Yes from going to gas to plasma is a chemical change.
Explanation:
I hope this helps :)