(Ch3ch2)3ch diagram
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Related Questions
0.14g of methanol is burnt and 3.04kJ of heat is released. Calculate the enthalpy of combustion of methanol.
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Answer:
-694.8 kJ/mol ≅ -695 kJ
Explanation:
The enthalpy of combustion (ΔHc) is defined as the amount of heat that is released when 1 mol of the compound is burned. We have the mass of methanol (0.14 g) and we have to calculate the moles present in that mass. For that, we need the molecular weight of methanol, which is calculated from the molar mass of the chemical elements.
Methanol: CH₃OH
Mw(CH₃OH) = (12 g/mol x 1 C) + (1 g/mol x 3 H) + 16 g/mol O + 1 g/mol H = 32 g/mol
moles of CH₃OH = mass/Mw(CH₃OH) = 0.14 g/(32 g/mol) = 4.4 x 10⁻³ mol
As the heat is released, the change in enthalpy is a negative value: -3.04 kJ.
Finally, we divide the released heat (-3.04 kJ) into the number of moles of CH₃OH:
ΔHc= (-3.04 kJ)/(4.4 x 10⁻³ mol CH₃OH) = -694.8 kJ/mol ≅ -695 kJ
7. Cecilia puts two magnetic toy trains very close to each other on a track. What will happen next, and
why.
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Balance the equation c2h2(g)+o2(g)-->co2(g)+h2o(g)+heat
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Answer: 2C2H2 (g) + 5O2 ----> 4CO2 (g) + 2H20 (g) + heat
Explanation:
how to round the decimal 4.15 to the hundredths place?
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Answer:4.15 is already in the hundreths place so you are good!
if it was 4.155 then you would round it to 4.16 but its NOT that so the answer IS 4.15
Explanation:
NEED HELP WITH THIS ASAP PLEAS
What is a mole
Question 1 options:
The SI base unit that represents quantity
The number of atoms in a substance
A large number
small furry animal
What is the value of Avogado's number?
Question 2 options:
6.022x1023
6.022x1023 moles
6.022x1024 moles
6.022x1022
Question 3 (0.1 points)
You have one mole rocks in a gravel pit. How many rocks are in this gravel pit?
Question 3 options:
1 rock
6.022 rocks
6.022x1023
6.022x1023 rocks
You have 5 moles of marbles. How many marbles is this?
Question 4 options:
3.011x1023 marbles
3.011x1024 marbles
6.022x1023 marbles
6.022x1023 moles
You have 1/2 of a mole of dollar bills. How many dollar bills do you have?
Question 5 options:
3.011x1023 moles
3.011x1012 dollars
3.011x1023 dollars
6.022x1023 dollars
You have 1.274 moles of peanuts. How many peanuts do you have?
Question 6 options:
7.672x1023 moles
6.022x1027 peanuts
6.022x1023 peanuts
7.672x1023 peanuts
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Answer:
23 atoms of sul- fur. Knowing this, you can measure out 55.847 g of iron and 32.066 g of ... Amount of substance in moles. Number of atoms, molecules, or formula units of substance. Convert using the molar mass of the substance. 1. 2. 3 ... Avogadro's number is the number of atoms per mole of lithium and can be used.
Knowing only the number of atoms of oxygen, you can find the grams of CO2. When converting from atoms to grams always make sure to keep track of your units!
Explanation: plz mark brainleist
Zinc reacts with lead (II) nitrate to produce zinc nitrate and lead. This reactions is:
Word form?
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Answer:
Displacement Reaction
Explanation:
Zinc replaces lead in Lead(ll) nitrate as zinc is more reactive than lead.
Shown above is information about the dissolution of AgCl(s) in water at 298K. In a chemistry lab a student wants to determine the value of s, the molar solubility of AgCl, by measuring [Ag+] in a saturated solution prepared by mixing excess AgCl and distilled water. How would the results of the experiment be altered if the student mixed excess AgCl with tap water (in which [Cl−]=0.010M) instead of distilled water and the student did not account for the Cl− in the tap water?
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Answer:
Value for K would be too small. Less AgCl would dissolve due to the common ion effect due to the presence of Cl- in the water.
Explanation:
Think of this through the lenses of a shifting problem. Cl- ions are a product in this situation and increasing its concentration would shift the reaction back to the solid AgCl. In this specific case, due to Cl- ions, AgCl would dissolve less to maintain equilibrium and as a result, the concentrations of Ag+ and Cl- ions would be lower than normal making a smaller K value.
In the solution of AgCl in tap water, the dissociation constant K has been decreased.
The dissolution of silver chloride in water results in the formation of silver ions and chloride ions.
The dissociation constant has been the amount of compound that has been dissociated into the constituent ions at equilibrium.
Dissociation constant for AgClThe dissociation constant has been dependent on the number of ions in the solution that has been present.
The common ion effect has been defined as the change in the dissociation constant for the compound with the presence of common ions in the solution.
The dissociation of AgCl in tap water has been resulted with presence of Cl ions in the solution. There has been early reach to the equilibrium in tap water.
Thus, with the solution of AgCl in tap water, the dissociation constant K has been decreased.
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if the map shows the average high temperature in July for two cities in Texas. like Del Rio=36°c
and Galveston 32°c.
what is the most likely explanation for the difference in average high temperature in July for these two cities.?
Answers
Answer:
D
Explanation:
Ocean breezes keep coastal galveston cooler than Del Rio, which is inland exposed to southerly winds.
2Fe2O3+3C_4Fe+3 CO2 how many moles of Carbon are needed to produce 1.9 moles of iron (Fe)?
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ANSWER PLEASE FAST Plants produce oxygen during photosynthesis True OR False
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Answer:
True
Explanation:
Explanation:
Ocean water density varies more at the the poles throughout the year than at the equator.
Lesson 2.08
True
False
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Answer:
true
Explanation:
i go to k12
Ocean water density varies more at the the poles throughout the year than at the equator. Therefore, the given statement is true.
What is density?Density is the mass of a specific material per unit volume. d = M/V, in which d is density, M is weight, and V is volume, is the formula for density. Grams per cubic centimeter are a typical unit of measurement for density. For instance, whereas Earth has a density of 5.51 grams, water has a density of 1 milligrams.
Particle density, which is typically represented as n, describes the number of particles per volume instead of the density of either a single particle. Ocean water density varies more at the the poles throughout the year than at the equator.
Therefore, the given statement is true.
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HELP ME WILL MARK BRAINIEST
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Adina is stranded on an island in the middle of the ocean. There is one stream on the island but the
water has lots of sand in it. Which technique should she use to remove the sand from the water?
Hint: give the technical term
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Answer:Adina removed the sand, employing a shovel, however she be laborious and therefore the stream will carry off the silt and therefore the sand.
She does not have to be compelled to do something, however to attend.
You fill the metal pot with ocean water and boil the water, the water can turn out to be steam and can move upwards, there you would like to dam the steam victimization the long metal plate, so the steam condenses into pure water droplets.
The metal plate must be inclined so the droplets flow downwardly and at last falls into a clean pot.
Finally you get the water within the clean pot.
Explanation:
Another and short answer:
she can remove the sand , using a shovel , but that will be hard. eventually the stream will carry off the silt and the sand . thus she doesn't have to do anything , but to wait .
Please give brainliest and thanks
HELPPPP!!!! Which statement about plants is accurate?
A.
Plants derive energy to grow from nutrients in the soil.
B.
Plants use sunlight and carbon dioxide to create food.
C.
Plants use oxygen and water to create food.
D.
Plants derive energy to grow from water and nutrients.
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Answer:
B. Plants use sunlight and carbon dioxide to create food.
Explanation:
This process is called photosynthesis
Which is the correct formula for the ionic compound that results from these two atoms? PLS HELP!!!
Answers
Answer:
If I am not wrong is C x2y5
Explanation:
The concept of valency is used here to determine the formula of the ionic compounds. The number of valence electrons in 'X' is 2 and that of 'Y' is 5. The formula is X₃Y₂. The correct option is D.
What is an ionic compound?The crystalline solids which are formed by neatly packed ions of opposite charges are defined as the ionic compounds. These compounds are formed by the combination of metals with non-metals.
The combining capacity of an element is given by valency. The elements belonging to the same group have the same valency. It is related to how many electrons are in the outer shell.
Here the number of valence electrons in 'X' = 2
The number of valence electrons in 'Y' = 5
The element 'X' need 6 electrons to attain the octet and 'Y' needs 3 electrons to attain the octet.
X - 6
Y - 3
The formula of the ionic compound is X₃Y₂.
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I need help with the questions in the picture. Please show workings.
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Explanation:
you need to review these formulas
4 ) which of the following is a true statement
5) what is true of all molecules based on the periodic table
a) they have electrochemical charges
b) they lack electrochemical charges
c) they have full outer electron shells
D) they contain at least one proton
Answers
Answer:
4:D 5:D
Explanation:
Since the number of atoms in a substance is so large, a unit to count them was created. This unit is the number of atoms in 12
grams of carbon-12 known as
A)
a mole
B)
a formula unit
Avogadro's number
D)
an atomic mass unit
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Which statement is true about heat transfer? *
5 points
a. Heat can only transfer when touching another object.
b. Heat always travels up.
c. Heat transfers from cooler to warmer objects.
d. Heat transfers from hotter to cooler objects.
Answers
Answer: A
Explanation:
heat always passes from a warmer object to a cooler object until all objects are the same temperature. Conduction is how heat travels between objects that are touching. Conduction travels fastest through solids, but liquids and gases can also conduct heat.
Why does the baseball move when the bat strikes it?
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Answer:
gravity
is
workin
Explanation:
HELP ME ANSWER THIS
If you could somehow travel inside an atom and look around, what part of the atom would you want to look at? Why?
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Answer:
I'd wanna see whats in the nuclues
Explanation:
Because its interesting to know what and how it really looks like up close. I also wanna know if an electron really has a light mass
What differentiates solid, liquid and gas phases from each other? As part of your response discuss how the energy of attraction between particles compares with their energy of motion (i.e. their kinetic energy, Ek), the distances between particles, their compressibility and their relative viscosities (i.e. resistance to flow).
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Answer:
I hope this helps
Explanation:
Solid = low kinetic energy, close distance between particles, not compresssible, higher flow resistance
Liquid = lower kinetic energy than gases, closer distance between particles than gases, relatively compresssible, high flow resistance than gases
Gas = high kinetic energy, far distance between particles, compresssible, low flow resistance
Q4) The changes that occur in an experiment that are directly caused by the experimenter (you) are called ___________.
Answers
Answer:
Independent Variables
Explanation:
These are changes that are made by the experimenter. They are factors that one is able to manipulate or control their values.
hydrogen gas reacts with oxygen gas to produce water. how many moles of hydrogen do you need to get 120 g of water? show work pleasee !!
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Make a diagram showing how communication satellites could be used to relay
information from a broadcasting station in new york to a receiving station in
london.
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Answer:
Explanation:
Satellite acts as a relay station for earth sources. A transmission station sends the information to the satellite, which in turn retransmits to the receiving stations. The original signal being transmitted from the earth station to the satellite is called uplink of 6 GHz The retransmitted signal from the satellite to the receiving station is called downlink of 4 GH frequency. The transponder is the transmitter-receiver combination in a transponder.
what is the formula for the ion potassium
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Answer:
The formula for a Potassium ion is K+
An alloy of sodium and potassium is used as a coolant due to its
A.high thermal conductivity
B.physical state
C.high reactivity
D.all except c
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Answer:
A
Explanation:
Because It's dense meaning that it doesn't burn
Explanation:
https://youtu.be/f_kgUUaMZlw
What are the products? Sodium Oxide + Calcium Chloride -
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Explanation:
Na²O +CaCl²=2NaCl + CaO
___________ is used to produce 30% of the world's electricity.
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Answer:
oil
Explanation:
coal be making most of the electricity
Answer:
power
Explanation:
Which diagram below represents the following reaction at equilibrium?
A2 + B2 ⇌ 2 AB Kc=4
Pls help, I will give brainliest!