Answer:
C. The energy released as the bonds in the reactants are broken is greater than the energy absorbed as the bonds in the product are formed.
Explanation:
CO + 2H₂ ⇌ CH₃OH ΔH <0As ΔH is negative, the given reaction is exothermic.
That means that the enthalpy of the product is less than the enthalpy of the reactants. In other words, part of the energy from the reactants is used to form new bonds (between C and H, for example), while the other part is transfered outside the system as heat.
Thus the correct answer is C.
Need help asap! Will give brainliest!!!!! (15pt)
Which scenario has been theorized as the possible fate of the universe?
A.
the big chill
B.
the big bang
C.
the big expansion
D.
the big heat
Answer:
Big Chill
Explanation:
Answer:
it's big chill or big freeze
Which of the following organisms carry out photosynthesis?
What energy is using the telephone?
1.electrical
2.sound
3.thermal
4.light
5.mechanical
Answer:
electrical
Explanation:
i kinda guessed.
Answer:
electrical energy is changed into sound energy
Part A
Consider the following neutral electron configurations in which n has a constant value. Which configuration
would belong to the element with the most negative electron affinity, Eea?
View Available Hint(s)
a 2s2
b 2s²2p2
c 2s²2p5
d 2s²2p6
Answer:
c. 2s2 2p5
Explanation:
2s2 2p5 has 7 valence electrons and only needs one electron to complete the octet. This element will be the most electronegative.
Use the following equation to answer the questions below:
Be + 2HCl → BeCl2 + H2
Answers are rounded.. pick the closest to your answer.
What is the mass of beryllium required to produce 25.0g of beryllium chloride? g
What is the mass of hydrochloric acid required to produce 25.0g of beryllium chloride? g
What is the mass of hydrogen gas produced when 25.0g of beryllium chloride is also produced? g
Explanation:
The equation of the reaction is given as;
Be + 2HCl → BeCl2 + H2
What is the mass of beryllium required to produce 25.0g of beryllium chloride?
1 mol of Be produces 1 mol of BeCl2
Converting to mass;
Mass = Molar mass * Number of moles
9.01g of Be produces 79.92g of BeCl2
xg of Be produces 25g of BeCl2
Solving for x;
x = 25 * 9.01 / 79.92
x = 2.82 g
What is the mass of hydrochloric acid required to produce 25.0g of beryllium chloride? g
Converting 25.0g of beryllium chloride to moles;
Number of moles = Mass / Molar mass
Number of moles = 25 / 79.92 = 0.3128 mol
2 mol of HCl produces 1 mol of BeCl2
x mol of HCl would produce 0.3128 mol of BeCl2
solving for x;
x = 0.3128 * 2 = 0.6256 mol
Converting to mass;
Mass = 0.6256 * 36.5 = 22.83 g
What is the mass of hydrogen gas produced when 25.0g of beryllium chloride is also produced? g
25g of BeCl2 = 0.3128 mol of BeCl2
From the equation;
1 mol of H2 is produced alongside 1 mol of BeCl2
This means;
0.3128 mol of H2 would also be produced alongside 0.3128 mol of BeCl2
Mass = Number of moles * Molar mass
Mass = 0.3128mol * 2.0159 g/mol = 0.6306 g
Brenda creates an animation that tells the story of a metal from when it is mined as an ore to when it is used as a shiny, protective coating on a car’s iron bumper.
Which two terms will Brenda most likely use in her animation, and in what order?
“electrometallurgy” followed by “electroplating”
“electrometallurgy” followed by “anodization”
“anodization” followed by “electroplating”
“electroplating” followed by “electrometallurgy”
Answer: A. “electrometallurgy” followed by “electroplating”
Explanation:
Right on edge :)
Answer:
It would be A. “electrometallurgy” followed by “electroplating”
Explanation:
Electrometallurgy is the reduction of metals from compounds to obtain the pure form of metal using electrolysis. In other words, a process in which ores are converted into the pure form of that certain metal through electrolysis.
Electroplating is a process of depositing a thin layer of metal onto an object in an electrolytic cell for strengthening or decorative purposes.
Also in case you are wondering, anodization is a process that makes the surface of metals resistant to corrosion, making the answers containing this process incorrect.
Hope this helps!
I would appreciate brainliest :)
When a metal reacts with oxygen gas what is the product formed
Answer:
Metal + Oxygen -> Metal Oxide
Explanation:
It's pretty self-explanatory. However, let me show you an example:
Iron + Oxygen -> Iron Oxide
Iron rusts. When iron rusts, it comes in contact with air to form Iron Oxide, which is rust itself.
10-14 is smaller than 107
Answer:
it is true because if you subtract 10 - 14 you will get -4 so it is less than 107.
Explanation:
Hope this helps!
Name an example of a molecule
Answer:
N2 (nitrogen) O3 (ozone) CaO (calcium oxide) C6H12O6 (glucose, a type of sugar)
Answer:
dihydrogen monoxide
dinitrogen monosulfide
1.5 atm is the same pressure as... (1 atm
760 mmHg)
1100 mmHg
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Gas Laws
PressureStoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 1.5 atm
[Solve] mmHg
Step 2: Identify Conversions
1 atm = 760 mmHg
Step 3: Convert
[DA] Set up: [tex]\displaystyle 1.5 \ atm(\frac{760 \ mmHg}{1 \ atm})[/tex][DA] Multiply/Divide [Cancel out units]: [tex]\displaystyle 1140 \ mmHg[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
1140 mmHg ≈ 1100 mmHg
Write down the names of the elements
Answer:
Carbon and hydrogen
Explanation:
C = Carbon
H = Hydrogen
make a prediction about the relationship between electrons and molecular shapes
Answer:
★ Molecular geometry is described by VSEPR theory, which basically states that electron pairs around a central atom will repel each other, and get as far apart as possible, in three dimensions.
Explanation:
Hope you have a great day :)
What is the [SO32-) in the 0.080 M H2SO3 .080 M Solution?
Answer:
0.080 M
Explanation:
From the question given above, the following data were obtained:
Concentration of H₂SO₃ = 0.080 M
Concentration of SO₃²¯ =…?
The concentration of SO₃²¯, can be obtained as follow:
H₂SO₃ (aq) <==> 2H⁺ (aq) + SO₃²¯ (aq)
From the balanced equation for above,
1 mole of H₂SO₃ produced 1 mole of SO₃²¯.
Therefore, 0.080 M H₂SO₃ will also produce 0.080 M SO₃²¯.
Thus, the concentration of SO₃²¯ is 0.080 M
write an apology letter to your principal telling him why you were not in the mathematics competition.in 4000 words
What is the second most consume grain in the world?
Answer:
Wheat!
Explanation:
Corn ranks first, Wheat, then Rice!
Which two parts of sedimentary rock formation include the breakdown and carrying away of existing rock?
Answer:
Cementation
Erosion
Explanation:
Cementation refers to hardening and welding of those sediments which are formed from preexisting rock fragments as a result of the precipitation of mineral matter in the spaces between the pore. The last stage in the formation of a sedimentary rock is Cementation.
Erosion is the geological process in which soil, rock, or dissolved material are worn away and transported from one location to another location by natural forces such as wind or water.
The two parts of sedimentary rock formation which include the breakdown and carrying away of existing rock are cementation and erosion.
Answer: The answer is A: Cementation and Erosion
Explanation: Hope this helps! happy new year
convert to moles:
100.0g Ca3(PO4)2
Answer:
0.322 moles
Explanation:
Given Mass, m = 100 g
The molar mass of Ca₃(PO₄)₂
Ca₃(PO₄)₂ = (3 x 40.08) + (2 x 30.97) + (8 x 16.00)
M = 310.18 g/mol
Let there are n number of moles,
n = given mass/ molar mass
[tex]n=\dfrac{100 }{310.18 }\\\\n=0.322\ mol[/tex]
So, there are 0.322 moles.
A gas with a volume of 4.0 L at a pressure of 2.02 atm is allowed to expand to a volume of 12.0
L. What is the pressure in the container if the temperature remains constant
P₂ = 0.67 atm
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightEquality Properties
Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtraction Property of EqualityChemistry
Gas Laws
Boyle's Law: P₁V₁ = P₂V₂
P₁ is pressure 1V₁ is volume 1P₂ is pressure 2V₂ is volume 2Explanation:Step 1: Define
[Given] P₁ = 2.02 atm
[Given] V₁ = 4.0 L
[Given] V₂ = 12.0 L
[Solve] P₂
Step 2: Solve
Substitute in variables [Boyle's Law]: (2.02 atm)(4.0 L) = P₂(12.0 L)[Pressure] Multiply: 8.08 atm · L = P₂(12.0 L)[Pressure] [Division Property of Equality] Isolate unknown: 0.673333 atm = P₂[Pressure] Rewrite: P₂ = 0.673333 atmStep 3: Check
Follow sig fig rules and round. We are given 2 sig figs as our smallest.
0.673333 atm ≈ 0.67 atm
How many grams are in 6.60 moles of ZnO?
Answer:
6.60 moles of ZnO have 537,108 g.
Explanation:
How can you tell if the equations in this simulation are following the law of conservation of mass?
Answer:
can u mark me brainliest
Explanation:
Following the Law
Matter cannot be created or destroyed in chemical reactions. This is the law of conservation of mass. In every chemical reaction, the same mass of matter must end up in the products as started in the reactants. Balanced chemical equations show that mass is conserved in chemical reactions
Calculate the mass of chromium produced from 50g of Cr2O3.
Answer: 34 gram of chromium produced from 50g of [tex]Cr_2O_3[/tex]
Explanation:
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]
[tex]\text{Moles of} Cr_2O_3=\frac{50g}{152g/mol}=0.33moles[/tex]
The decomposition of [tex]Cr_2O_3[/tex] follows the equation :
[tex]2Cr_2O_3\rightarrow 4Cr+3O_2[/tex]
According to stoichiometry :
2 moles of [tex]Cr_2O_3[/tex] produce = 4 moles of [tex]Cr[/tex]
Thus 0.33 moles of [tex]Cr_2O_3[/tex] will produce=[tex]\frac{4}{2}\times 0.33=0.66moles[/tex] of [tex]Cr[/tex]
Mass of [tex]Cr=moles\times {\text {Molar mass}}=0.66moles\times 52g/mol=34g[/tex]
Thus 34 gram of chromium produced from 50g of [tex]Cr_2O_3[/tex]
a 0.25kg shoe is thrown out a window during a physical class. the shoe attains an acceleration of 9.8m/s before hitting an inspecting individual standing on a sidewalk. how much Force(In Newton's) did the shoe hit with?
Explanation:
Here is a history of questions and answers processed by "Ask the Physicist!". If you like my answer, please consider making a donation to help support this service.
If there is a link to a previously answered question, be patient. Since the files containing the older answers are rather large, it takes some time (maybe as much as 15 seconds or so) to find the appropriate bookmark.
3. Consider the reaction of methane, CH4, burning in the presence of oxygen at constant pressure. Given the following equation, how much heat could be obtained by the combustion of 8.0 grams CH4? Given the thermochemical equation: CH4(g)+2O2→CO2(g)+2H2O(l); ΔH0=890.3kJ;
Answer: 445.15 kJ of heat could be obtained by the combustion of 8.0 grams [tex]CH_4[/tex]
Explanation:
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]
[tex]\text{Moles of} CH_4=\frac{8.0g}{16.04g/mol}=0.50moles[/tex]
The given thermochemical equation is:
[tex]CH_4(g)+2O_2(g)\rightarrow CO_2(g)+2H_2O(g)[/tex] [tex]\Delta H=890.3kJ[/tex]
According to stoichiometry :
1 mole of [tex]CH_4[/tex] on combustion produce heat = 890.3 kJ
Thus 0.50 moles of [tex]CH_4[/tex] on combustion produce heat =[tex]\frac{890.3}{1}\times 0.50=445.15kJ[/tex]
Thus 445.15 kJ of heat could be obtained by the combustion of 8.0 grams [tex]CH_4[/tex]
How is conservation of mass illustrated in this simulation? Explain your answer.
Answer:
Do part by part
Explanation:
A random radioisotope has a decay constant of 0.00238 years-1. If
1165 years have past, and there was originally 80 grams of it,
roughly how many grams of the original radioisotope remain?
Answer:
5 grams remain
Explanation:
A = A₀exp(-k·t) 80g·exp(-0.00238yr⁻¹)(1165yrs) = 80g x 0.063 = 5 grams remain
please answer it quickly
Answer:
B.
A.
D.
A.
C.
Hope it helps..
Have a great day : )
Easy Chem, Will Give brainliest
Answer:
3.94 L
Explanation:
From the question given above, the following data were obtained:
Mass of O₂ = 5.62 g
Volume of O₂ =?
Next, we shall determine the number of mole present in 5.62 g of O₂. This can be obtained as follow:
Mass of O₂ = 5.62 g
Molar mass of O₂ = 2 × 16 = 32 g/mol
Mole of O₂ =?
Mole = mass / molar mass
Mole of O₂ = 5.62 / 32
Mole of O₂ = 0.176 mole
Finally, we shall determine the volume of 5.62 g (i.e 0.176 mole) of O₂ at STP. This can be obtained as follow:
1 mole of O₂ occupied 22.4 L at STP.
Therefore, 0.176 mole of O₂ will occupy = 0.176 × 22.4 = 3.94 L at STP.
Thus 5.62 g (i.e 0.176 mole) of O₂ occupied 3.94 L at STP
Which of the following is NOT a property of matter?
solubility
Hardness
Mass
Density
Answer:
hardness im sure
Explanation:
What are the reactants in the following reaction?
2FeS + 302 → 2FeO + 2502
iron (II) sulfide and oxygen
iron (II) sulfide and iron (II) oxide
oxygen and sulfur dioxide
iron (11) oxide and sulfur dioxide
Answer:
Iron (II) sulfide and oxygen
Could a child inherit a dominant trait if neither of her parents express the dominant trait? show the cross
Answer:
yes it does
Explanation:
I searched it up