Answer:
The amount of P₄S₃ produced is 0.16 moles.
Explanation:
The balanced reaction is:
8 P₄ + 3 S₈ → 8 P₄S₃
By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate:
P₄: 8 moles S₈: 3 moles P₄S₃: 8 molesBeing the molar mass of each compound:
P₄: 123.895 g/molS₈: 256 g/mol P₄S₃: 220.093 g/molthen by stoichiometry of the reaction, the following amounts of reactant and product participate in the reaction:
P₄: 8 moles* 123.895 g/mol= 991.16 gS₈: 3 moles* 256 g/mol= 768 gP₄S₃: 8 moles* 220.093 g/mol= 1,760.744 gThe limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.
In this case, you calculate the limiting reactant using the following rule of three: if by stoichiometry 768 g of S₈ react with 991.16 g of P₄, 40 g of S₈ with how much mass of P₄ will it react?
[tex]mass of P_{4}=\frac{40 grams of S_{8} *991.16 grams of P_{4} }{768 grams of S_{8}}[/tex]
mass of P₄= 51.62 grams
But 51.62 grams of P₄ are not available, 20 grams are available. Since you have less mass than you need to react with 40 grams of S₈, P₄ will be the limiting reagent.
Then you can apply the following rule of three: if by stoichiometry 991.16 grams of P₄ form 8 moles of P₄S₃, 20 grams of P₄ will form how many moles of P₄S₃?
[tex]moles of P_{4} S_{3}=\frac{20 grams of P_{4} *8 moles ofP_{4} S_{3} }{991.16 grams of P_{4}}[/tex]
moles of P₄S₃= 0.16
The amount of P₄S₃ produced is 0.16 moles.
compare pure substance with mixture
Answer:
here
Explanation:
a pure substance consists only of one element or one compound. a mixture consists of two or more different substances, not chemically joined together.
How many molecules of H2O are in 8.54 moles of H2O?
Select one:
a)5.14 * 10^24 molecules H2O
b)2.86 * 10^23 molecules H2O
c)6.02 * 10^23 molecules H2O
d)5.14 * 10^23 molecules H2O
Answer:
a)5.14 * 10^24 molecules H2O
Explanation:
8.54 moles of H2O contains 8.54 x 6.022 x 10^23 = 5.14 x 10^24 molecules of H2O.
In Chromium-53, the "53" represents the
Answer:
The differemt isotopes that differ in atomic mass
Explanation:
If your experiment did not seem to match the expected results, what did you learn from the experience?
Answer:
i learnt that the different result that i got can be prepared through my experiment. if that result is useful for anywork or for me then i can note down my procedure and use it again to get that result . And while noting it down i will know about the mistake that i did due to which i got different result and i can do correction of it in next time.
What is the density of an object that has a mass of 500g and a volume of
10mL?
Please help!
Avogadro's number is the number of particles in one gram of a carbon-12 atom. (2 points)
True
False
(EDIT: Answer is false, just took the test)
Answer:
false
Explanation:
Avogadro's number : the number of units in one mole: 6.022 × 1023, which is the number of atoms in 12 grams of carbon-12.
Answer:
false
Explanation:
i took the test.
Oxygen has 6 valence electrons, hydrogen has just one. Elements want to gain or lose electrons to complete their valence shells of eight electrons. How many atoms of hydrogen does a single atom of oxygen want to bond with? What is the name of this compound?
Answer:
water
Explanation:
Oxygen has 6 valence electrons, hydrogen has just one. Elements want to gain or lose electrons to complete their valence shells of eight electrons.
When oxygen combine with hydrogen it needed two electrons to complete the octet that's why two hydrogen atoms are combine with one atom of oxygen.
2H₂ + O₂ → 2H₂O
Both share the electron and form covalent bond because electrons are not equally share.
Covalent bond:
It is formed by the sharing of electron pair between bonded atoms.
The atom with larger electronegativity attract the electron pair more towards it self and becomes partial negative while the other atom becomes partial positive.
For example:
In water the electronegativity of oxygen is 3.44 and hydrogen is 2.2. That's why electron pair attracted more towards oxygen, thus oxygen becomes partial negative and hydrogen becomes partial positive.
Can someone please walk me through this?-- 25 pts!
Calculate the change of enthalpy for the reaction CH4 (g) + NH3 (g) --> HCN (g) +3H2 (g) from the following reactions:
Reaction 1: N2 (g) + 3H2 (g) --> 2NH3 (g); Change in enthalpy: -91.8 kJ/mol
Reaction 2: C (s, graphite) + 2H2 (g) --> CH4 (g); Change in enthalply: -74.9 kJ/mol
Reaction 3: H2 (g) + 2C (s, graphite) + N2 (g) --> 2HCN (g); Change in enthalpy: +270.3 kJ/mol
I have to include the following:
The numerical answer with correct units.
State which reactions, if any, you had to "Flip".
State which reactions you had to multiply, if any, to get the correct amount of the compound. Also, include how much you multiplied the reaction by.
NH3(g) + CH4(g) ⇒ HCN + 3H2 ∆ H:255.95 kJ/mol
Further explanationGiven
Reaction and the enthalpy
Required
The change of enthalpy
Solution
Reaction 1
N2 (g) + 3H2 (g) --> 2NH3 ∆ H: -91.8 kJ/mol⇒reverse
2NH3 ⇒ N2 (g) + 3H2 (g) ∆ H: +91.8 kJ/mol
Reaction 2
C (s, graphite) + 2H2 (g)⇒ CH4 (g) ∆H: -74.9 kJ/mol ⇒reverse
CH4 (g) ⇒ C (s, graphite) + 2H2 (g) ∆H: +74.9 kJ/mol ⇒ x2
2CH4 (g) ⇒ 2C (s, graphite) + 4H2 (g) ∆H: +149.8 kJ/mo
Reaction 3
H2 (g) + 2C (s, graphite) + N2 (g) ⇒ 2HCN (g);∆ H: +270.3 kJ/mol
Add up all the reactions and remove the same compound from different sides :
2NH3 ⇒ N2 (g) + 3H2 (g) ∆ H: +91.8 kJ/mol
2CH4 (g) ⇒ 2C (s, graphite) + 4H2 (g) ∆H: +149.8 kJ/mol
H2 (g) + 2C (s, graphite) + N2 (g) ⇒ 2HCN (g) ∆ H: +270.3 kJ/mol
-----------------------------------------------------------------------------------------
2NH3(g) + 2CH4(g) ⇒ 2HCN + 6H2 ∆ H: 511.9 ⇒ :2
NH3(g) + CH4(g) ⇒ HCN + 3H2 ∆H:255.95
Evaluate the following scenario and critically think about the following statement:
"Chemistry is like cooking"
Last night I made a large pot of soup. I added the following ingredients into a pot:
[Potatoes, green beans, onion, celery, carrots, chicken, sazon, adobo, rice]
I added some heat into this pot and let it simmer for about 30 minutes. After I finished cooking the soup, I went ahead and served myself a large portion. To my surprise, when I was eating the soup, I found that there was beef and noodles in the soup?!
1. Is this scenario possible?
2. Does this equation make sense?
[Ingredients for chicken and rice soup] yield [beef and noodle soup]
3. In chemistry, do my ingredients need to match the results?
Answer:
No
No
Yes
Explanation:
how many atoms of hydrogen are in 420g sample of water
Electron affinities generally become more favorable (more negative) as you move from left to right across a
period. However, the electron affinity for Be is less favorable than the electron affinity for Li, as shown below.
Li(g) + e + Li (9) EA = -60 kJ/mol
Be(g) + e + Be (g) EA> 0 kJ/mol
Which of the following best helps to explain why the electron affinity for Be is less favorable than the electron
affinity for Li?
Answer:
Explanation:
Be has a full 2s orbital whereas Li has a paramagnetic orbital; i.e., incomplete orbital which serves to need an electron to fill while Be does not.
The electron affinity of Be is higher than Li, as Be has been shielded with high energy than Li.
The electron affinity has been defined as the energy required to add an electron to the ground state of the atom.
The nonmetal has easily able to gain the electron and thus have low electron affinity, while metals have high electron affinity.
On moving from Li to Be there has been an addition of the electron. The electron addition in Be has been more difficult as the coming electron is shielded from the core elements strongly.
Thus, the electron affinity of Be is higher than Li, as Be has been shielded with high energy than Li.
For more information about Electron affinity, refer to the link:
https://brainly.com/question/977718
What are the methods of naming hydrocarbons?
Explanation:
Hey there!
Basically, we name hydrocarbon in two ways. They are;
Trival system of nomenclature: This system was used on past. They were given name knowing their sources from which hydrocarbon are obtained. On this naming we don't use scientific rules and structural values. For example; methane was named from marsh gas.IUPAC system of nomenclature: As the above method was not standard. IUPAC (International Union of pure and applied chemistry) improved the system and the started naming hydrocarbon. The IUPAC name of any compound contains two parts: root word and suffix. Example: Methane is named from root word Meth as it has one no.of carbon and suffix ane as it has single bonding.Hope it helps...
Sodium is a metal that explodes in water, while chlorine is a poisonous gas. When combined, however, they make edible table salt. Why?
Group of answer choices
1) When atoms bond they undergo a chemical change, which changes their physical properties.
2) Two negatives make a positive
3) Salt is actually still poisonous, because of the chlorine in it.
4) The sodium and the chlorine have undergone a physical change, into a solid. The solid part is edible.
Answer:
Option B
Explanation:
While adding salts to water is a pretty safe chemical reaction, in its elemental state, each component can be highly reactive. Sodium and chlorine both react violently with water, but are stable when their ions are together in a salt.
What are the coefficients?
Answer:
1, 3, 2
Explanation:
1 x N2 = N2
3 x H2 = H6
2 x NH3 = N2H6
which is balanced, I believe.
Which of the following is necessary to do a complete stoichiometric calculation? (5 points)
Add the nuclear masses of the products,
Divide the nuclear masses of the reactants,
Write the complete balanced chemical equation
Write the number of atoms in 1 mole of the product,
Answer:
Write the mole rato/Write the complete balanced chemical equation
Explanation:
there are two form of this question but only one of these answers will show up.
The stoichiometric calculations has been based on the writing of the balanced chemical equation. Thus option C is correct.
Stoichiometric calculations has been based on the chemical equation for a reaction. The stoichiometric chemical in a balanced chemical equation has helped in the calculation of the moles of the compounds involved in the chemical equation.
The complete stoichiometric calculations has been performed with the molecular mass of the compounds, and has been completed with the balanced chemical equation. Thus, option C is correct,
For more information about the stoichiometric calculation, refer to the link;
https://brainly.com/question/2563006
What is the independent variable in this reaction
Answer:
Explanation:
what wheres the answer???
Help me first to answer will get brainliest
What is an example of a reservoir?
(A )Beach (B )Cloud (C )Desert (D )Lake
Answer:
the answer should be Lake
Answer: D
Explanation:
Five molecules will enter the BODY of an organism(1.Amino Acids, 2. Protein, 3. Glucose, 4. Starch, and 5. Oxygen). However, only three molecules will actually enter the CELLS. Which three molecules will enter every cell in the human body?
What else is produced during the combustion of butane, C4H10?
2C4H10 + 13O2 8________ + 10H2O
H2O
C4H10
CO2
O2
Another product: CO₂
Further explanationGiven
Reaction
2C₄H₁₀ + 13O₂⇒ 8__+ 10H₂O
Required
product compound
Solution
In the combustion of hydrocarbons there can be 2 kinds of products
If there is excess Oxygen, you will get Carbon dioxide(CO₂) and water in the product
If Oxygen is low, you'll get Carbon monoxide(CO) and water
Or in other ways, we can use the principle of the law of conservation of mass which is also related to the number of atoms in the reactants and in the products
if we look at the reaction above, there are C atoms on the left (reactants), so that in the product there will also be C atoms with the same number of C atoms on the left
2C₄H₁₀ + 13O₂⇒ 8CO₂+ 10H₂O
Answer:
is C. CO2
Explanation:
Can somebody help me I’ve been a helping hand all day and nobody helping like does the app work or I need to delete.
I believe that #1 is the lie, but I'm not great at this subject.
Please help me due in like 2 min
A model of the water cycle was made by adding a small amount of water into an aquarium, covering the aquarium with a piece of glass, and placing a lamp over the glass cover to add heat. What does the lamp represent when comparing this model to the real-life water cycle?
Clouds
Precipitation
The ocean
The sun
Answer: D) The sun
Explanation:
is the reaction balanced?
Answer:No there needs to be fewer red on the reactant side.
Explanation:
A metalloid has physical and chemical properties of _____________
A: metals , nonmetals
B: metals and noble gases
C: halogens and noble gas
Answer:
Typical metalloids have a metallic appearance, but they are brittle and only fair conductors of electricity. Chemically, they behave mostly as nonmetals. They can form alloys with metals. Most of their other physical properties and chemical properties are intermediate in nature.
true of false? After Vincennes was recaptured by the British,
George Rogers Clark captured it again in a
surprise attack.
if it’s false give an explanation why
Answer:
False
Explanation:
Answer:Terms in this set (17)
T/F Mohawk war chief Joseph Brant was one of the few Native Americans who sided with the Patriots. ... After George Rogers Clark captured Vincennes, it remained in Patriot control. True. After Vincennes was recaptured by the British, George Rogers Clark captured it again in a surprise attack.
Explanation:
Please help, there is a picture with the question
Answer:
Bromine
Explanation:
They are in the same collumn and elements share the most properties with those in their family
Which statements about viruses are true? Select all that apply.
Viruses can be seen with a compound light microscope.
Viruses vary greatly in size and structure.
Some viruses contain RNA instead of DNA.
Some viruses use the cell's machinery to replicate more viruses.
Plant viruses can infect animals if ingested.
Bacteriophages are viruses that infect bacteria, plants, and animals.
Answer:
Viruses can be seen with a compound light microscope.
Viruses vary greatly in size and structure
Some viruses use the cell's machinery to replicate more viruses
Explanation:
Ethyl alcohol evaporates faster then water, why?
Answer:
because it melting point is low
Answer:
Alcohol evaporates because of its vapor pressure and therefore, its molecule lying at the surface of alcohol (liquid-gas boundary) breaks its hydrogen bonding and tends to escape out of the alcohol solution. It should be noted that alcohol evaporates at a faster rate than water.
Which one sounds better "the reign of scar", or "Scar's Reign"
Answer:
i think
Explanation:
"the reign of scar" will sound better
I like "Scar's Reign". If you really like "the Reign of Scar" I suggest finding a synonym to "reign" that fits nicer. Good luck with... whatever you're doing. Hope this helps :)
MULTIPLE CHOICE
A student added phenolphthalein to two solutions. Solution A remained clear while Solution B
turned pink. Which of the following could be the pH of Solution B?
The pH of the solution B will be 10.
• One of the indicators that helps the chemists to determine visually that whether the substance is an acid or a base is the phenolphthalein.
• The phenolphthalein changes color due to ionization, and this changes the shape of the molecules of phenolphthalein.
• Naturally, phenolphthalein is colorless, however, it turns pink in alkaline solutions.
• The solution turns pink at the pH ranging between 8.2-10.
• Phenolphthalein has two distinct compositions based on whether it is an acid (colorless) or alkali (pink) solution.
Thus, turning of solution B to pink color by adding phenolphthalein indicator shows that the pH of the solution would be 10 based on the given options.
To know more about:
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please don't report me I just want to make you feel good I beg you
Answer:
this comic was pretty funny