Answer:
the plan is:
Explanation:
2. Calculate the heat of combustion of C6H14(l) in kJ/mol if 1.66 g of C6H14(l) were ignited in a calorimeter containing 2750. g H2O. A 3.54˚C temperature rise was observed. The calorimeter constant is 11.2 kJ/˚C. The specific heat of water is 4.184 J/g˚C.
This problem is describing the combustion experiment where by the heat of combustion of 1.66 g of liquid C6H14 can be calculated via calorimetry. The calorimeter (C=11.2kJ/°C) contains 2750. grams of water with a temperature rise of 3.54 °C, it means we can calculate the total heat released by the combustion of this hydrocarbon via:
[tex]Q_{combustion}=-(Q_{calorimeter}+Q_{water})[/tex]
Because the heat of combustion is released to the water and the calorimeter. Next, we break down each heat and subsequently plug in the given values:
[tex]Q_{combustion}=-(11200\frac{J}{\°C}*3.54\°C +2750.g*4.184\frac{J}{g\°C}*3.54\°C )\\\\Q_{combustion}=-80,379J=-80.4kJ[/tex]
After that, we calculate the moles of C6H14 by considering the given mass and its molar mass (86.18 g/mol):
[tex]n=1.66g*\frac{1mol}{86.18g} =0.01926mol[/tex]
And finally, we divide the total heat of combistion by the moles to get the heat of combustion:
[tex]\Delta H_{comb}=\frac{-80.4kJ}{0.01926mol} =4,174\frac{kJ}{mol}[/tex]
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https://brainly.com/question/14317568https://brainly.com/question/14154214Based on the periodic table, what is the oxidation number of oxygen (Group VI, period 2) in compounds? a) 0 b) +2 C) -2 d) 1
The oxidation number of oxygen (Group VI, period 2) is -2.
The electrical charge of an atom describes its Oxidation number.\The number of electrons that must be gained or lost in an atom's valence electron shell to make it to be filled or half-filled gives us the oxidation number value.When the atom gains electrons,it acquires a negative oxidation number. When the atom loses electrons,it acquires a positive oxidation number
Oxygen has 8 electrons with {He] 2s² 2p⁴ configuration. With 6 electrons in its valence shell, it need to gain 2 electrons to achieve stability, When it gains 2 electrons, it acquires a negative oxidation number of -2.
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According to Dalton, atoms of different elements will be____________.
Answer:
The atoms of different elements vary in size and mass.
Explanation:
According to Dalton, atoms cannot be SELECT ALL THAT APPLY a Created b Destroyed c Subdivided d Bonded
Answer:
The answer is subdivided,created or destroyed
What is collision theory?
A.a theory stating that reactants must collide with products in order for a chemical reaction to occur
B.a theory stating that there must be minimal kinetic energy between products for a chemical reaction to occur
C.a theory stating that a chemical reaction occurs only when reactants strike each other at the correct orientation and with sufficient kinetic energy
D.a theory stating that a chemical reaction occurs only when reactants are placed in separate containers and the containers are then placed close together
Answer:
A
Explanation:
collision theory is a theory used to predict the rates of chemical reactions, particularly for gases. The collision theory is based on the assumption that for a reaction to occur it is necessary for the reacting species (atoms or molecules) to come together or collide with one another
hii what the procedures of making organic fertilizer and its precautions. can u answer it i kinda need it now
Answer:
Go through your kitchen waste. Vegetables and fruit peelings are the number one food remnants you should keep aside. ...
Add other organic materials to the compost. ...
Collect some garden waste. ...
Create the compost. ...
Apply the fertilizer.
Answer:
AbstractOrganic fertilizers are an essential source for plant nutrients and a soil conditioner in agriculture. Due to its sources and the composition of the organic inputs as well as the type, functionality and failures of the applied treatment process, the organic fertilizer may contain various amounts of infectious agents and toxic chemicals, especially the antibiotics that can be introduced to the subsequent food chain. A range of human and animal pathogens of bacterial, viral and parasitic origin have been the cause of food-borne epidemics due to unintended contamination from organic fertilizers. The use of antibiotics by humans and in animal feeds will also end up in the organic fertilizers. These antibiotics and other chemicals, depending on the sources of the organics, will enhance the likelihood of occurrence of resistant and multi-resistant strains of microorganisms in society and have been reported to cause ecotoxicological environmental effects and disruption of the ecological balance. Exposure of microorganisms to sublethal concentration of antibiotics in the organic products induces antibiotic resistance. WHO guidelines for the reuse of excreta and other organic matters identify the risk for the exposed groups to the reuse of the
Explanation:
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B. A +ion (positive ion, one with extra positive charge)?
Nitrogen has two naturally occurring isotopes.
Predict the number of neutrons in the two isotopes of
nitrogen, N.
How many protons?
Electrons?
Answer:
Nitrogen has 7 protons and 7 electrons and 7 neutrons.
Explanation:
The atomic number of an element is the number of electrons and protons they have. The atomic mass - the atomic number of an element equals the number of nuetrons. The atomic mass of nitrogen is 14 and the atomic number is 7 therefore we have to subract, 14-7=7.
A tiny crystal of a solid substance is added to an aqueous solution of the same substance. What would happen if the original solution was: 1) Super saturated 2) Unsaturated 3) Saturated.
Answer:
3.)Saturated
Explanation:
it was saturated and then turned super saturated
¿Cuál es la partícula mas pequeña del átomo?
Answer:
Los quarks son ciertamente unas de las partículas más pequeñas del universo. Son elementales, indivisibles y no se pueden romper en piezas menores.
Explanation:
Help Please
I Have to finish this assignment asap
Answer:a. limiting reactant
b. actual yield
c. mole ratio
d.excess reactant
e.theoretical yield
f.stoichiometry
g.percent yield
h.limiting reactant
i.theoretical yield
Explanation: ..
what object in our solar system has the largest gravitational force
Answer: The sun
Explanation: because it has the most mass
Answer:
Hey there. That would be Jupiter.
Jupiter is the largest in our solar system which means it has the highest gravity.
Something that potatoes and bacteria have in common is that they both reproduce(1 point)
via vegetative reproduction.
using tubers.
via binary fission.
asexually.
The things that potatoes and bacteria have in common is that they both reproduce asexually. Thus option 4 is correct.
What is reproduction?Reproduction is defined as the biological process that creates new individual organisms from existing ones, also referred to as "offspring"
It can also be defined as the process by which identically minded organisms make new organisms.
There are two types of reproduction.
Sexual reproduction - It is defined as a method of reproduction whereby male and female gametes combine to create an offspring.Asexual reproduction - It is defined as a method of reproduction that doesn't modify the number of chromosomes or involve the fusing of gametes.Thus. the things that potatoes and bacteria have in common is that they both reproduce asexually. Thus option 4 is correct.
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What is the main piece of evidence supporting the theory of seafloor spreading?
Fossils of plants and animals along the ocean floor
Volcanic activity along the Ring of Fire
Glacial scratches on the seafloor
Alternating magnetic pattern in the rocks of the ocean floor
Answer:
Alternating magnetic pattern in the rocks of the ocean floor
Explanation:
The rocky sea floor on either side of mid-ocean ridges has a matching pattern of magnetic stripes. This information provides evidence for sea-floor spreading. The matching striped pattern shows that Earth’s polarity was recorded on either side of the ridge as lava oozed from the ridge and cooled.
Answer:
Alternating magnetic pattern in the rocks of ocean floor.
Explanation:
The ocean floor consists of several types of rocks.The mid-ocean ridges has a similar pattern as well as magnetic field lines.So this makes a clear evidence.please help me with the second image questions it is really important and I really need it please help me out and provide me the answers for the second image two questions, looking at the first image please.
Answer:
is this exam.. are you coping..
Propose an explanation for why the element carbon, rather than sodium, is important in forming natural polymers?
I need this ASAP
9. The “power plant” of the cell is the
(a) nucleus.
(b) ribosome.
(c) chloroplast.
(d) mitochondria.
Answer:
D. Mitochondria
Explanation:
The mitochondria, labeled the powerhouse of the cell, are the organelle responsible for energy production within the cell
2. What physical force causes suspensions to settle
Hello!
Answer:
Gravity
Explanation:
It can settle down and separate over time due to gravity.
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When carbon dioxide enters the blood, some of it combines with ____________ to form carbaminohemoglobin, but most of it becomes ____________ ions that diffuse into the blood plasma.
Answer:
hemoglobin to become bicarbonate
Explanation:
When carbon dioxide enters the blood it combines with hemoglobin to form carbamino hemoglobin or carboxyhemoglobin but most of it becomes carbonate ions and diffuse into the blood plasma.
What is carboxyhemoglobin?Hemoglobin is a blood protein giving red colour to the blood. It helps to transport oxygen everywhere. When oxygen fills in the air sack, it combines with oxygen and form oxyhemoglobin.
However, hemoglobin have more affinity towards carbon dioxide and and they combines to form carbaminohemoglobin which prevents the transportation of oxygen through blood.
The carbon dioxide will be converted into carbonic acid by combining with water. This acid then forms its carbonate ions and these ions helps to maintain the blood pH to be constant.The carbonate ions, CO₃²⁻can easily diffuse into blood plasma.
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A model for a potential chemical reaction is shown here. Evaluate the model and the reaction shown. Which statements are correct about this model. Select ALL that apply.
A) The law of conservation of matter is followed in this model.
B) Conversation of matter is not observed because of some of the atoms are converted into energy in the reaction.
C) Conservation of matter is observed because there are the same number of each atom on both sides of the reaction.
D) Conservation of matter is not observed because there are different numbers of molecules in the reactants and the products.
Answer: b/c
Explanation:
How many molecules are in 0.79 moles of NH4?
Answer:
14
Explanation:
what scientist is credited with formulating the octet rule
Answer:
The electron configuration of the neon atom. American chemist Gilbert Lewis (1875-1946) used this observation to explain the types of ions and molecules that are formed by other elements. He called his explanation the octet rule.
When potassium metal is placed in water, a large amount of energy is released as potassium hydroxide and hydrogen gas are produced in the reaction 2K(s) + 2H2O(l) → 2KOH(aq) + H2(g). Your lab partner says this is a redox reaction and a combustion reaction. Do you agree? Defend your answer by explaining whether or not it meets the requirements of each type of reaction.
This is a redox reaction but not a combustion reaction.
Redox Reaction
A type of chemical reaction that involves a transfer of electrons or gain of electrons between two-element. An oxidation-reduction reaction is any chemical reaction in which the oxidation number of a molecule, atom, or ion changes.
Combustion reaction
It must have two products. CO2 and H2Ooxygen in the reactant is must.
∴ The reaction is Redox ✓ not combustion
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cyclic voltametry allows one to measure the __________ of a compound.
Answer:
*two parameters
Explanation:
anyone have any ideas on what i should draw for my art project please let me know
Answer:
A pumpkin or a deer cus it's hunting season
Birds, Scenerys, Fish, Planets, Seas, Trees, Butterflys, BTS, Fruits, Cactus! Drawing Ideas: Imagination
Draw an object and give it a face.
Create an alternate cover to your favorite book or album.
Illustrate a scene from your favorite song.
Draw a scene or character from your favorite book.
Illustrate your favorite fairy-tale.
Invent your own insects.
Draw an intricate made up flower.
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please help as soon as possible!!!
Answer:
the kidney control the amount of water, ion, and other substances in the blood by excreting more or less of them in urine, also secretes the hormones that help maintain homeostasis
¿que otro nombre reciben las órbitas?
Describe the process of pasteurization?
Answer:
Pasteurization is a process in which packaged and non-packaged foods (such as milk and fruit juice) are treated with mild heat, usually to less than 100 °C (212 °F), to eliminate pathogens and extend shelf life.
I need help with the question below
Answer:
the answer is Crystal structures
the temperature of absolute zero is stated as ___________.
Answer:
-273.15 degrees Celsius
-459.67 degrees Fahrenheit
It is considered to be coldest conceivable temperature and is impossible to reach
Explanation:
If you are looking for degrees it is
-273.15 degrees Celsius
-459.67 degrees Fahrenheit
or just 0 on the keilvin scale