Answers
H20–>H2+1/2O2
So ΔΗ3=483.6/2
2)The second equation must be halved and reversed.
CO2–>CO+1/2O2
So ΔΗ2=-(-566)/2=566/2
And now :
C+O2–>CO2
CO2–>CO+1/2O2
H2O—>H2+1/2O2
(You add them)
C+H2O—>CO+H2
ΔΗrxn=ΔΗ1+ΔΗ2’+ΔΗ3’=-393.5+283+241,8=131,3
Related Questions
Which of these equations is balanced?
1. 4Sb + 3O2 → Sb4O6
2. H3 AsO4 → As2O5 + H2O
3. SiO2 + HF → SiF4 + H2O
4. CO2 + NH3 → CO(NH2)2 + H2O
Answers
Answer:
the first is the answer
A scientist is studying a protist and records the following information about it:Cell has a nucleus Has a flagella Produces oxygen Found in salt water Which conclusion is best supported by the information?A. B.The protist is an animal-like flagellate because it has a flagellum. C.The protist is a plant-like dinoflagellate because it produces oxygen.D.The protist is a plant-like dinoflagellate because it was found in salt water.The protist is an animal-like flagellate because it has a nucleus.
Answers
Answer:
B)The protist is a plant-like dinoflagellate because it produces oxygen.
Explanation:
This was the answer on edge nuity
The conclusion that is best supported by the information is that the protist is a plant-like dinoflagellate because it produces oxygen.
What is a protist?A protist is any eukaryotic organism that is, an organism whose cells contain a cell nucleus that is not an animal, plant, or fungus. While it is likely that protists share a common ancestor (the last eukaryotic common ancestor,the exclusion of other eukaryotes means that protists do not form a natural group, or clade.
Therefore, some protists may be more closely related to animals, plants, or fungi than they are to other protists. However, like the groups algae, invertebrates, and protozoans, the biological category protist is used for convenience. Others classify any unicellular eukaryotic microorganism as a protist.The study of protists is termed protistology.
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Indicate whether each statement is true or false: a. Substitutional alloys tend to be more ductile than interstitial alloys. b. Interstitial alloys tend to form between elements with similar ionic radii. c. Nonmetallic elements are never found in alloys.
Answers
Answer:
Substitutional alloys tend to be more ductile than interstitial alloys. true
Interstitial alloys tend to form between elements with similar ionic radii.false
Nonmetallic elements are never found in alloys. false
Explanation:
Substitutional alloys consists components having similar atomic(ionic) radii as well as common bonding characteristics. In interstitial alloys, atoms in interstitial positions must have a much smaller covalent radius than the solvent atoms. Interstitial atoms are generally less ductile than substitutional alloys.
Nonmetals are found in alloys. For instance, carbon is a component of the common alloy called steel.
___are organelles found in plant cells. They absorb energy from sunlight and use that energy to drive chemical reactions that produce sugars and oxygen.
Answers
Chloroplasts
Hope this helps !!
How are plant and animal structures similar?
Answers
Answer:
I think they both need water and sun light to stay alive
Explanation: Animals need water so they can have energy and they have extra energy when they are in the sun they have more energy
1)
v (m/s)
9.6
다
2.4
0
6.0
10.0
18.0 (5)
What two quantities must stay the same in order for an object to have a constant velocity?
A)
The speed and kinetic energy must be constant.
3
B)
The speed and mass of the object must be constant.
The speed and direction of travel must be constant.
D)
The force applied to and direction of travel must be constant.
Answers
Answer:
A
Explanation:
a is the right answer abi
What is the coefficient of H2 when the following equation is correctly balanced? CO (g) + H2(g) → H20 (g) + CH4 (9)
Answers
Answer:
3. CO + 3H₂ ⇒ H₂O + CH₄
Explanation:
match reactants and products on both sides of the equation.
what are the materials needed during photosynthesis?
Answers
What is genetic mutation
Answers
Answer:
A gene mutation is a permanent alteration in the DNA sequence that makes up a gene, such that the sequence differs from what is found in most people.
EZ MODE -_- What could you do in an experiment to get more accurate results? Change two of your variables. Only make observations that involve sight. Only use new materials. Perform repeated trials
Answers
Answer:
they change the object hehehehe
Answer:
D. Perform repeated trials.
Explanation:
I did the exam and got it correct :D!
identify the type and number of atoms in each molecule of the reactants and products.
CaCO3 -> CaO + CO2
Answers
Answer:
CaCO3: 1 calcium 1 carbon 3 oxygen
CaO: 1 calcium 1 oxygen
CO2: 1 carbon 2 oxygen
To see the number of atoms of any element in a particular molecule or compound, we need to multiply the stoichiometry that is written in front of the molecule to the number that is written on the foot of that element. The number of atoms of calcium, carbon and oxygen are 1, 1, 3.
What is atom?Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.
The balanced reaction is
[tex]CaCO_{3}\rightarrow CaO + CO_{2}[/tex]
There are three types of element present in this reaction: calcium, oxygen and carbon
Number of atoms of calcium on reactant and product side is 1
Number of atoms of carbon on reactant and product side is 1
Number of atoms of oxygen on reactant and product side is 3
Therefore, the number of atoms of calcium, carbon and oxygen are 1, 1, 3.
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please helppppp w the picture
Answers
For the elements in the "f-block," how is the row number related to the principal energy level for the last orbital notation of their electron configurations?"
Answers
Answer:
See explanation
Explanation:
Given that the row number is the same as the period or energy level(shell) in which the electron is found.
If we designate this row number as "n", we know that the highest principal energy level for the f orbitals is obtained as (n-2) f.
Thus, we obtain the highest principal energy levels for the "f block" elements by subtracting 2 from the row number.
Anna broke a test tube. She picked up the pieces of glass with one hand and placed them in her other hand.
Once she picked up all of the pieces, she placed them in the garbage can. What was not done correctly? What
should have been done instead?
Answers
Answer:
Tell the teacher and wait for it to be swept up.
All living organisms are composed of
OA. at least three cells.
ОВ.
one or more cells.
OC. at least 100 cells.
OD. only one cell.
Answers
Answer:
OB- one or more cells
Explanation:
hope this helps :)
How is radiation different from conduction?
SELECT AN ANSWER
Radiation is the transfer of heat through molecular contact, and conduction is the transfer of energy by waves.
Radiation is the transfer of energy by waves, and conduction is the transfer of heat through contact with air.
Radiation is the transfer of energy by waves, and conduction is the transfer of heat through molecular contact.
Radiation is a type of heat transfer in the atmosphere as opposed to conduction, which does not transfer energy.
Answers
Answer:
Radiation is the transfer of energy by waves, and conduction is the transfer of heat through contact with air.
Explanation:
Conduction is the transfer of thermal energy through direct contact. Radiation is the transfer of thermal energy through thermal emission.
ALUMINUM (AI)
+ NITRATE (NO3)
Answers
Answer:
Al(No3)3
Explanation:
hope this is correct....
write the relation between wavelength frequency and velocity for a sound wave
Answers
Explanation:
frequency; the no of round completed in one second is called frequencywavelength; the distance between two identical point on wave line velocity; the distance cover in one second is called velocityThe electron configuration below applies to which element? 1s2 2s2 2p6 3s2 3p1
Answers
When a cold front is approaching, what happens?
Answers
Answer:There is colder and drier air coming
Explanation:
Answer:
Cold fronts generally move from northwest to southeast. The air behind a cold front is noticeably colder and drier than the air ahead of it. When a cold front passes through, temperatures can drop more than 15 degrees within the first hour.
Explanation:
Which element’s atoms have the greatest average number of neutrons?
Answers
Answer:
53
Explanation:
the atomic number is 53, then Number of neutrons=127-53=74 Since, the number of neutrons are large in Tellurium, therefore Tellurium have the greatest average number of neutrons.
explain what happens during the chemical reaction
CaCO3 -> CaO + CO2
Answers
check out this article i found it very helpful,
I couldn't find the answer to your question.
what is a substrate
Answers
Answer:
a substrate is surface or material on or from an organism lives, grows, or obtains its nourishment.
Explanation:
Hey I hope this helps.....
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10 grams of calcium-37 remain after 700 milliseconds (0.700 seconds).
How much calcium was in the original sample?
Answers
Answer:
hahahh noob
Explanation:
How many moles are in 825 atoms of carbon?
Answers
1.37 × 10⁻²¹ mol C
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Using Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:Step 1: Define
825 atoms C
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
[tex]\displaystyle 825 \ atoms \ C(\frac{1 \ mol \ C}{6.022 \cdot 10^{23} \ atoms \ C} )[/tex] = 1.36998 × 10⁻²¹ mol C
Step 4: Check
We are given 3 sig figs. Follow sig fig rules and round.
1.36998 × 10⁻²¹ mol C ≈ 1.37 × 10⁻²¹ mol C
which line represents the gas state?
Answers
Answer: F : Gas
Explanation:
hi !!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answers
Hahaha hey! What’s up!
What happens to the pH of an acid when the solution is diluted by a factor of 10?
Answers
Answer:
Diluting an acid decreases the concentration of H+(aq) ions, which increases the pH level of the solution towards 7, making it less acidic.
Explanation:
However, the pH level of an acidic solution cannot become greater than 7, because the water you add to dilute it is not alkaline.
state with reasons the most suitable methods for collecting hydrogen
Answers
Answer:
Upward delivery or downward displacement of air
Explanation:
The method of collection of a gas is dependent on it's density.
Gases that are less dense than air are collected by upward delivery or downward displacement of air while gases that are denser than air are collected by downward delivery or upward displacement of air.
Hydrogen is less dense than air hence it is collected by upward delivery or downward displacement of air.
Long form EC for Aluminum