Answer:
The key to this problem lies with aluminium's specific heat, which as you know tells you how much heat is needed in order to increase the temperature of 1 g of a given substance by 1∘C.
In your case, aluminium is said to have a specific heat of 0.90Jg∘C.
Find the percent nitrogen in ammonium oxide.(Answer = 53.8%)
Answer:
6. 36.7%
Explanation: 7. 21.2% 8. 48%
12.
Which of the following does not indicate that a chemical reaction occurred when the iron filings
were added to the copper(II) sulfate?
You didn't provide the answer choices so I'll give all that I know.
No color change occurs
No odor is produced
No gas is produced
No temperature change occurs(Stays at room temp)
No precipitation occurs
Explain why potassium atom would not bond with a calcium atom.
Potassium atom would not bond with a calcium atom because two metals because they are not capable of accepting electrons.
What is a Metal?This is referred to as a substance with high electrical conductivity, luster, and malleability, which readily loses electrons to form positive ions known as cations.
The formation of chemical bonds in a reaction requires a change in electron distribution which can only be possible when one of the elements participating in the reaction can accept electrons and is therefore the reason why two metals such as potassium and calcium atom can't form a reaction but two non metals can.
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Which choice explains a use of a Venn diagram?
graphs sizes and amounts using bars
illustrates similarities and sizes only
illustrates ways things are similar and different
charts numbers using shapes
Answer:
illustrates ways things are similar and different
Explanation:
Answer:
illustrates ways things are similar and different
which of the following substances is formed deep under earth
Answer:
Oil
Explanation:
everything else is above the earth
A 35.3g of element M is reacted with Nitrogen to produce 43.5g of compound M3N2. What is the molar mass of the Element?
Balanced chemical reaction
[tex]\\ \rm{:}\dashrightarrow 3M+N_2\longrightarrow M_3N_2[/tex]
3 mol weighs 35.3gMolar mass=35.3/3=11.77g/molMuch of earth surface is covered by groundwater, body of fresh water, land areas, or bodies of salt water?
Based on what you learned in the video, draw a model that shows how weathered rock turns into sedimentary rock. Use the paragraph above to guide you, and label all parts of the process. Mark the location of highest pressure.
Answer:
This is what it looks like! Mark brainliest if u think im right <3
Explanation:
Weathering and erosion on the Earth's surface break down volcanic rock becoming pebbles, sand, as well as mud, resulting in sedimentary rock.
What is sedimentary rock?Sedimentary rock, rock generated at or near the Earth's surface as a result of sediment deposition and lithification or precipitation into solution at typical surface temperatures.
Sedimentary rocks are among the most frequent on the Earth's surface, although they make up just a minuscule portion of the crust, which would be dominated by metamorphic and igneous rocks.
Weathering and erosion on the Earth's surface break down volcanic rock becoming pebbles, sand, as well as mud, resulting in sediment that collects in basins just on Earth's surface. The image for the formation of sedimentary rock is given below.
Therefore, weathering and erosion on the Earth's surface break down resulting in sedimentary rock.
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H2O2(aq)+ClO4−(aq)→ClO2−(aq)+O2(g)
Express your answer as a net ionic equation including phases in basic solution
Answer:
H
2
O
2
(aq)+ClO
4
−
(aq)⟶O
2
(g)+ClO
2
−
(aq)
All atoms except H and O are balanced.
The oxidation number of Cl changes from 7 to 3. The change in the oxidation number is 4.
The oxidation number of O changes from -1 to 0. The change in oxidation number per O atom is 1.
Total change in the oxidation number for 2 oxygen atoms is 2.
To balance the increase in oxidation number with decrease in the oxidation number, multiply H
2
O
2
and O
2
with coefficients 2.
2H
2
O
2
(aq)+ClO
4
−
(aq)⟶2O
2
(g)+ClO
2
−
(aq)
To balance O atoms, add 2 water molecules on RHS.
2H
2
O
2
(aq)+ClO
4
−
(aq)⟶2O
2
(g)+ClO
2
−
(aq)+2H
2
O(l)
The oxygen atoms are already balanced.
This is the balanced chemical equation
N2(g) + 3H2(g) → 2NH3(g); ΔH = -91.8 kJ Consider the thermochemical equation for the synthesis of ammonia. Which statement is true? A) Negative enthalpy indicates that energy is required to complete the reaction. B) Negative enthalpy indicates a decrease in potential energy and an endothermic reaction. C) Enthalpy is negative indicating that energy is released so this is an exothermic reaction. D) Enthalpy is negative indicating that there is an energy deficit; the reaction is incomplete.
The energy of -91.8 kJ in the reaction equation shows that energy is released so this is an exothermic reaction.
What is a thermochemical equation?A thermochemical equation is one which just does not only show the reactants and products but also shows the energy absorbed or emitted in the reaction.
We can see from the thermochemical equation; N2(g) + 3H2(g) → 2NH3(g); ΔH = -91.8 kJ that the negative enthalpy implies that energy is released so this is an exothermic reaction.
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A 35.3g of element M is reacted with nitrogen to produce 43.5g of compound M3N2.what is (i) the molar mass of the element (ii) Name.of the element
The molar mass of M is 40.2 g/mol and the name of the element is Calcium.
35.3g of element M reacted with nitrogen to produce 43.5g of compound M3N2.
Chemical reaction3M + N₂→ M₃N₂
Therefore,
let the molar mass of element = x
35.3 g of M = 43.5 g of M₃N₂
3x g of M = 3x + 28
cross multiply
35.3(3x + 28) = 43.5(3x)
105.9x + 988.4 = 130.5x
988.4 = 130.5x - 105.9x
988.4 = 24.6x
x = 988.4 / 24.6
x = 40.1788617886
x = 40.2
Therefore, the molar mass of M is 40.2 g/mol and the name of the element is Calcium.
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can some please help me with this question
Answer:
the first would be an polar compound the second would be a ionic compound and the third would be nonpolar compound
How much energy is produced in each stage cellular respiration and how is it used?
Answer:
Some of the energy from the electrons is used to pump hydrogen ions across the membrane, creating an electrochemical gradient that drives the synthesis of many more molecules of ATP. In all three stages of cellular respiration combined, as many as 38 molecules of ATP are produced from just one molecule of glucose.
Explanation:
Calculate the molar mass of Na2CO3. What percentage (% comp) of Na2CO3 is composed to sodium?
Answer:
43.40%
Explanation:
What are the correct coefficients in order for the equation to be balanced ?
Answer:
1. 2
2. 2
3. 3
Explanation:
That's my answer
How fire differ from flame?
[tex]brainlyeveryday[/tex]
Answer:
=> Fire is a rapid oxidation of any substance or material. It is a exothermic chemical process of combustion.
=> Flame is a visible, gaseous region of a fire.
_____ resources are resources that cannot be replenished within a lifetime.
Question 1 options:
Nonrenewable
Renewable
Living
Endangered
Answer:
Non Renewable would be correct option
Explanation:
Non Renewable resources are resources that cannot be replenished within a lifetime.
These resources cannot be replaced after once used.
Examples of Non Renewable resources are Coal , Petroleum & gas etc .
5.00 kg glycol, Ca(OH)2. [this is antifreezel] is added to your radiator. If your radiator contains 12.0 kg
of water, what would be the freezing point of the water-antifreeze mixture? The molal freezing point
depression constant for water is 1.86 'C.kg/mole.
The freezing point is mathematically given as
ft=-12.5C
What would be the freezing point ?Question Parameters:
5.00 kg glycol, Ca(OH)2. [this is antifreeze] is added to your radiator. If your radiator contains 12.0 kg
The molar freezing point depression constant for water is 1.86 'C.kg/mole.
Generally the equation for the Freezing point is mathematically given as
ft=k f [tex]\frac{wB}{Mb}*1000/Wa[/tex]
Therefore
0-ft=1.89*5000.62*1/12
ft=-12.5C
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Denaye drives 25 km to work every day along the route tgere is a traffic light every 5,000 meters. How many traffic lights does denaye pass on her way to work
Answer:
5
Explanation:
1km = 1,000m
5km = 5,000m = 1 light
25/5 = 5
CK12 Stoichiometry and Thermochemical Equations
4/10
Use the following thermochemical equation:
2Na(s) + Cl2(g) + 2NaCl(s) + 822 kJ
A certain reaction releases 471 kJ of heat. What mass of NaCl
was produced in the reaction?
The mass of sodium chloride (NaCl) produced from the reaction when 471 KJ of heat is released is 67.04 g
Balanced equation2Na + Cl₂ —> 2NaCl ΔH = + 822 kJ
Molar mass of NaCl = 23 + 35.5 = 58.5g/mol
Mass of NaCl from the balanced equation = 2 × 58.5 = 117 g
SUMMARY
From the balanced equation above,
When 822 KJ of heat is released, 117 g of NaCl were produced.
How to determine the mass of NaCl producedFrom the balanced equation above,
When 822 KJ of heat is released, 117 g of NaCl were produced.
Therefore,
If 471 KJ of heat is released, then = (471 × 117) / 822 = 67.04 g of NaCl will be produced
Thus, 67.04 g of NaCl were obtained from the reaction
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2 SO2(g) + O2(g) + 2 H2O(ℓ) −→ 2 H2SO4(ℓ)
What mass in grams of SO2 is needed to
react with 1527 g of O2?
Answer:
6116g
Explanation:
2SO2(g) + O2(g) + 2H2O(ℓ) −→ 2H2SO4(ℓ)
We want to find the mass in grams of SO2 that is needed to react with 1527 g of O2. First we must convert the grams of O2 to moles of O2 then to moles of SO2 and then to grams of SO2
So first lets find the molar mass of O2
The mass of oxygen according to a periodic table is 15.999
Using this the mass of O2 would be 15.999(2) = 31.988g
Next we need to identify the mole ratio of O2 to SO2
Looking at the equation for 1 mole of O2 there are two moles of SO2
Next we need to find the molar mass of SO2
Again the mass of oxygen is 15.999g and the mass of Sulfur is 32.066
So the mass of SO2 would be 15.999(2) + 32.066 = 64.064g
Now that we have found all the needed conversions :
1 mol O2 = 31.988g 1 mol O2 = 2 mol SO21 mol SO2 = 64.064gWe can now use dimensional analysis to calculate the answer.
Kindly check the attached image to see the table. ( sorry if its a bit blurry )
Explanation : The conversions are used to cancel out the units to get to the final unit which is gSO2.
Once the units are cancelled out except for the gSO2 we mutliply and divide based off of what the table says to do.
Here first we divide 1527 by 31.988. We than multiply by 2. Finally we multiply by 64.064 to get the final answer which is 6116gSO2
HELPPPPP How is precipitation related to high- and low-pressure air? A) High-pressure systems lead to rain B) Low-pressure systems lead to rain. C) Both high- and low pressure systems lead to rain. D) Neither high- nor low-pressure systems lead to rain
Why? Because high-pressure systems don't allow vapor to get high enough to "become clouds," therefore it will not rain. :)
~pinetree
20 points help with this chemistry question please I will be soo grateful.
A sample of gas starts at 1.00 atm, 0.00 degrees Celsius, and 30.0 mL. What is the volume if the temperature increases to 27.0 degrees Celsius and the pressure increases to 2 atm?
A. 65.9 mL
B. 54.6 mL
C. 16.5 mL
D. 13.7 mL
Explanation:
[tex] \frac{p1v1}{t1} = \frac{p2v2}{t2} [/tex]
1 × 30/273 = 2 × V2/300
V2=300×30/2×273
V2= 16.5 ml
A container holding four gases has a total pressure of 1.05 atm. Calculate the patrial pressure of carbon monoxide in a container that holds 0.5 atm of carbon dioxide, 0.3 atm of nitrogen, and 0.1 atm of hydrogen
Answer:
The partial pressure of an individual gas is equal to the total pressure multiplied by the mole fraction of that gas.
PLEASE NEED HELP!!!!!
Name the following compound
Answer:
3-methylhexane
Explanation:
For naming alkane molecules follow the following steps
1) Find the longest continuous carbon chain and count the number of carbons
In this structure, it is from the bottom, then up, then to the right. Making a right angle. There is 6 carbons in this chain which means it's a hexane
2) Number the longest carbon chain so the constituents (parts not part of the carbon chain) are connected to the carbon with smallest number possible.
This gives the extra CH3 group connected to carbon 3
3) Put it all together
Methyl connected to carbon 3 + hexane
3-methylhexane
Which is a fossil fuel? A. Biomass B. Wind C. Nuclear D. Petroleum
Answer:
(D) petroleum
Explanation:
because as we know that petroleum is obtain from the sea bed,within the remains of animals and plants which lived millions of year ago......
Why does a floating leaf indicate photosynthesis has occurred
Urgent, please walk me through this
Answer:
H
Explanation:
PLEASE HELP!!
The bond energy of O-H is 464 kJ/mol. What is the total bond energy of 2OH?
The total bond energy of 2OH bond is 928 kJ/mol
Bond energyBond energy is the energy needed to break or form bonds. They are measured in kilojoule per mole (kJ/mol).
Total bond energy of 2OH
Since we are given that the bond energy of O-H is 464 kJ/mol and we require the total bond energy of 2OH. In 2OH, the are two O-H bonds.
So, the bond energy of the two O-H bonds will be twice that of the single O-H bond.
So bond energy of 2OH = 2 × bond energy of O-H = 2 × 464 kJ/mol
= 928 kJ/mol
So, the total bond energy of 2OH bond is 928 kJ/mol
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aldehydes plus potassium permanganate with explanation
[tex] \large \sf \: answer[/tex]
You can identify the aldehyde from acidic potassium permanganate. Purple colour of acidic potassium permanganate is changed to colourless because aldehyde is oxidized by acidic potassium permanganate.