Answer:
4 moles of Fe are needed to produced 6 moles of H₂
Explanation:
This is the whole reaction:
2Fe + 3H₂SO₄ → Fe₂(SO₄)₃ + 3H₂
The equation determines:
2 mol of iron can react to 3 moles of sulfuric acid in order to produce 1 mol of iron (III) sulfate and 3 moles of hydrogen gas.
If we see the stoichiometry ratio is 2:3, from reactant to product but we need to know from product to reactant.
Then, we can solve it by an easy rule of three:
3 moles of H₂ can by produced by the reaction of 2 moles of Fe
Then 6 moles of H₂ may be produced by (6 . 2)/3 = 4 moles of Fe
4 moles of Fe are needed to produced 6 moles of H₂
what would ebony do in water
Explanation:
It should be seen that perhaps the intensity of Ebony timber is greater than the concentration. This can drown if this is heavier than water, but that will floating whether it is not viscous than air.
If a radioactive source has a half life of 2 hours how long will it take for the activity to go from 200 to 25?
Answer:
It takes 6h to the radioactive source decrease its activity from 200 to 25
Explanation:
The equation that describes the readioactive decay is:
Ln [A] = -kt + Ln [A]₀
Where [A] could be taken as activity of the source after time t, [A]₀ is initial activity and k is decay constant.
Decay constant could be written as:
k = ln2 / Half-life
k = ln 2 / 2h
k = 0.3466h⁻¹
Replacing in decay equation:
Ln [25] = -0.3466h⁻¹t + Ln [200]
-2.0794 = -0.3466h⁻¹t
6h = t
It takes 6h to the radioactive source decrease its activity from 200 to 25
Can someone help me please
only wave A you have given ....wave B ?
Based on the table above, which amount of a compound dissolved in 100 grams of water at the stated temperature represents a system at equilibrium?
Select one:
a. 40 g NaCl at 70 degrees Celsius
b. 20 g KClO3 at 70 degrees Celsius
c. 80 g NaNO3at 10 degrees Celsius
d. 80 g Pb(NO3)2 at 30 degrees Celsius
Answer:
C. 80g Nano3 at 10 degrees Celsius
Explanation:
I just took the test
80 g NaNO₃ at 10 degrees Celsius of a compound dissolved in 100 grams of water at the stated temperature represents a system at equilibrium. Therefore, option C is correct.
What is solubility ?The maximum quantity of a chemical that will dissolve in a given amount of solvent at a particular temperature is referred to as its solubility.
Different compounds have very varying solubilities, which is a feature of a particular solute-solvent pair.
A substance's physical and chemical characteristics affect how soluble it is. A few other factors and circumstances can also influence it. A few of these are: temperature, pressure, kind of binding, and forces between the particles.
A system is said to be in equilibrium when 80 grammes of a substance, dissolved in 100 grams of water at 10 degrees Celsius.
Thus, option C is correct.
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What type of reaction is illustrated?
2FeBr3 + 3Na2S → Fe2S3 + 6NaBr
A. synthesis
B. decomposition
C. double replacement
Answer:
Double replacement is the answer
can we stir silver nitrate solution with copper spoon? why or why not? support your answer with reason.
↪ Hello miss "galaxyu035" here's your answer for the question you wrote.
Answer :
No, we cannot stir silver nitrate solution with a copper spoon because , copper is more reactive than silver. Thus,it would displace silver from the silver nitrate solution forming copper nitrate.
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what is solar radiation?
Explanation:
Solar energy is the radiant energy emmitted from the Sun. It is the electromagnetic energy
What happens during the treatment step in refining crude oil for energy use?
A. Chemicals are added to the oil so that it burns more cleanly.
B. Different fractions are combined to make a variety of final products.
C. Heavy fractions are chemically “cracked" into lighter ones.
D. Crude oil is cleaned with a water mixture.
Answer:
I think its B im not sure lol but I would wait for someone that actually would know for sure
Different fractions are combined to make a variety of final products during the treatment step in refining crude oil for energy use. Therefore, the correct option is option B.
What is refining?A material or a form is purified by the process of refining, which is also maybe referred to by the mathematical word affixing. The phrase is typically used to describe a resource that is practically useable but is more valuable in its purest form.
The phrase refers to a wide range of changes, including more extreme ones as the conversion of ore to metal (for more information, see Refining (metallurgy)). Different fractions are combined to make a variety of final products during the treatment step in refining crude oil for energy use.
Therefore, the correct option is option B.
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PLZ HELP THIS IS DUE TODAY AND ILL GIVE BRAINLIEST
Answer:
particle size
Explanation:
because except that all are the examples that the speed of dissolving can be changed
Answer:
Adding water
Explanation:
When a solid is dissolving the speed cannot be changed by adding water
PLEASE HELP!!!! ILL GIVE BRAINLIEST HELP ASAP
Do metals that react vigorously with acids also react vigorously with oxygen and water?
Answer: Sodium is the metal reacts vigorously with oxygen and water.
Explanation:
sodium
Every few years, some of the trade winds that blow directly over the ocean weaken. What changes would be most likely to occur next Increasing ocean temperatures cause current speeds to increase. Ocean temperatures near the equator grow cooler and current speeds increase. Ocean temperatures near the equator grow cooler, causing heavy rainfall worldwide. The area of warm surface water near the equator increases in size and ocean currents slow or stop.
Answer:
Increasing ocean temperatures cause current speeds to increase.
Explanation:
As the temperature of ocean increases, the speed of current is also increases because these currents stored more heat energy that leads to the increase in speed of ocean currents. Due to increase in global temperature, global ocean circulation has been increases since 1990s. The main reason for that is the increase in the concentration of greenhouse gases in the atmosphere that increases the temperature of the environment so the speed of ocean currents also increases.
A neutral atom of fluorine contains 9 electrons. How many of these electrons are in s orbitals?
a. 4
b. 2
c. 6
d. 9
According to the electronic configuration , there are 4 electrons in s orbitals of fluorine and 5 electrons in p orbitals.
What is electronic configuration?Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
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Which is NOT a property of metals? Group of answer choices luster brittleness conductivity ductility
luster
brittleness
conductivity
ductility
Answer:
wait i am kinda counfuesd
Explanation:
As you probably already know, ductility is the ability of a metal to receive permanent deformation without fracturing. Metals that can be formed or pressed into another shape without fracturing are ductile. In general, all metals are ductile at elevated temperatures.
Since metals bend by creating and moving dislocations, the near absence of dislocation motion causes brittleness. On the positive side, the difficulty of moving dislocations makes quasicrystals extremely hard. They strongly resist deformation.
Conductivity in metal is a measure of a material's ability to transmit heat, or electricity (or sound). The reciprocal of conductivity is resistance, or the ability to reduce the flow of those.
Metals are lustrous, malleable, ductile, good conductors of heat and electricity. Other properties include: ... Luster: Metals have the quality of reflecting light from its surface and can be polished e.g., gold, silver and copper.
Chose which one you thing it is.
used to carry the whole part
Which element has 60 protons?
Answer: Neodymium
Explanation: atomic number is the # of protons
look pic for the detail.
Question 19 Multiple Choice Worth 3 points)
(06.04 MC)
What forensic scientist established the 'Body Farm' to study the ways bodies decompose under different circumstances?
Matheiu Orfila
Sir Edward Henry
Phillipe Locard
Bill Bass
Answer:
The answer is D Bill Bass
Explanation:
Remember it from the lesson and I took the test.
Has anyone done this???!!!
Answer:
top one is anaphase and the middle one is cytokinesis can't see enough of the bottom one to tell
Explanation:
Plants cannot grow too close together because their Blank______ need to spread out and absorb nutrients from the soil.
their roots need room to spread out
Cells come from other cells. Question 1 options: Sometimes
A. True
B. Never
C. False
Answer:
A I took this quiz today and got it right.
Can someone help me with this I will guve brainliest
How many liters of hydrogen are required to react completely with 2.4L of oxygen to form water? 2H2 + O2 --> 2H2O
Answer:
2.4 mole of oxygen will react with 2.4 moles of hydrogen
Explanation:
As we know
1 liter = 1000 grams
2H2 + O2 --> 2H2O
Weight of H2 molecule = 2.016 g/mol
Weight of water = 18.01 gram /l
2 mole of oxygen react with 2 mole of H2
2.4 mole of oxygen will react with 2.4 moles of hydrogen
what are 3 pairs of atoms that will react?
Answer:
Phosphorus Trichloride, water and carbon dioxide
A 100 mL sample of ethanol at 25°C is mixed with a 300 mL sample of ethanol at -5°C. The mixture is allowed to come to thermal equilibrium. What is the final temperature?
Answer: The final temperature of the mixture will be [tex]2.5^0C[/tex]
Explanation:
[tex]heat_{absorbed}=heat_{released}[/tex]
As we know that,
[tex]Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})[/tex]
[tex]m_1\times c_1\times (T_{final}-T_1)=-[m_2\times c_2\times (T_{final}-T_2)][/tex] .................(1)
where,
q = heat absorbed or released
[tex]m_1[/tex] = mass of first sample of ethanol = 100 ml
[tex]m_2[/tex] = mass of second sample of ethanol = 300 ml
[tex]T_{final}[/tex] = final temperature = ?
[tex]T_1[/tex] = temperature of first sample of ethanol = [tex]25^oC=298K[/tex]
[tex]T_2[/tex] = temperature of second sample of ethanol = [tex]-5^oC=268K[/tex]
[tex]c_1[/tex] = [tex]c_2[/tex] = specific heat of ethanol
Now put all the given values in equation (1), we get
[tex]-100\times (T_{final}-298)=[300\times (T_{final}-268)][/tex]
[tex]T_{final}=275.5K=2.5^0C[/tex]
Therefore, the final temperature of the mixture will be [tex]2.5^0C[/tex]
What are the products of the following equation?
Al2(SO4)3 + Ca3(PO4)2 ---> 2AlPO4 + 3CaSO4
What has a complete ionic equation of Mg(s) + Zn2+ + 2NO3 → Mg2+ + 2NO3 + Zn(s)?
O A. Mg(s) + Zn2+ → Mg2+ + Zn(s)
O B. Mg(s) + Zn(NO3)2(aq) + Mg(NO3)2(aq) + Zn(s)
O C. Mg(NO3)2 + Zn(s) → Zn2+ + 2NO3 + Mg(s) O D. Mg(s) + 2Zn(NO3)(aq) + 2MgNO3(aq) + Zn(s)
Answer: [tex]Mg(s)+Zn(NO_3)_2(aq)\rightarrow Mg(NO_3)_2(aq)+Zn(s)[/tex]
Explanation:
Complete ionic equation : In complete ionic equation, all the substance that are strong electrolyte and present in an aqueous are represented in the form of ions.
Net ionic equation : In the net ionic equations, we do not not include the spectator ions in the equations.
Spectator ions are the ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.
The equation given is:
[tex]Mg(s)+Zn^{2+}+2NO_3^-\rightarrow Mg^{2+}+2NO_3^-+Zn(s)[/tex]
The complete molecular equation will be:
[tex]Mg(s)+Zn(NO_3)_2(aq)\rightarrow Mg(NO_3)_2(aq)+Zn(s)[/tex]
The complete ionic equation of[tex]\rm Mg(s) + Zn^{2+} + 2NO_3 \rightarrow Mg^{2+} + 2NO_3 + Zn(s)[/tex] is[tex]\rm Mg(s) + Zn^{2+} \rightarrow Mg^{2+} + Zn(s)[/tex]. So, option A is right.
A complete ionic equation shows all of the ions that are present in a reaction, including the spectator ions. In this reaction, magnesium metal (Mg(s)) reacts with zinc(II) ions ([tex]\rm Zn^2+[/tex]) to form magnesium(II) ions ([tex]\rm Mg2+[/tex]) and zinc metal (Zn(s)).
The balanced molecular equation for this reaction is:
[tex]\rm Mg(s) + Zn(NO_3)_2(aq) \rightarrow Mg(NO_3)_2(aq) + Zn(s)[/tex]
The complete ionic equation is:
[tex]\rm Mg(s) + Zn^{2+}(aq) \rightarrow Mg^{2+}(aq) + Zn(s)[/tex]
The spectator ions are the nitrate ions ([tex]\rm NO_3^-[/tex]), which are present on both sides of the equation. They do not participate in the reaction, so they are not included in the complete ionic equation.
The other choices are incorrect because they do not show all of the ions that are present in the reaction.
Therefore, the answer is A. [tex]\rm Mg(s) + Zn^{2+} \rightarrow Mg^{2+} + Zn(s)[/tex].
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Why do elements in the same group on the periodic table have similar
properties?
A. They have similar numbers of neutrons.
B. They have similar atomic masses.
C. They have similar numbers of protons.
ОО
D. They have similar numbers of valence electrons.
SUBMIT
PREVIOUS
A compound is analyzed and determined to be 30.4% nitrogen and 69.6%
oxygen. What is the empirical formula of the compound?
Answer:
NO2
Explanation:
The empirical formula represents the simplest whole number ratio of the elements in a compound. According to the question;
30.4% represents 30.4g of nitrogen
69.6% represents 69.6g of oxygen
First, we convert each mass value to mole by dividing by their respective molar masses as follows:
N = 30.4/14 = 2.17mol
O = 69.6/16 = 4.35mol
Next, we divide each mole value by the smallest (2.17)
N = 2.17/2.17 = 1
O = 4.35/2.17 = 2.0046
Approximately, the ratio of N to O is 1:2, hence, the empirical formula is NO2
Which type of plate boundary is associated with seafloor spreading at the source of the spread: convergent, divergent, or transform?
Answer:
The answer is divergent
Please answer ... go to my questions to see previous one
Answer:
Ano po ba grade hirap namn po yan