Answer:
[tex]\boxed {\boxed {\sf 4038.48 \ Joules}}[/tex]
Explanation:
Since we are given the mass, specific heat, and change in temperature, we should use this formula for heat:
[tex]q=mc\Delta T[/tex]
The substance's mass is 450.0 grams, the specific heat is 1.264 J/g°C, and the change in temperature is 7.1 °C.
[tex]m= 450.0 \ g \\c= 1.264 \ J/g \textdegree C\\\Delta T= 7.1 \ \textdegree C[/tex]
Substitute the values into the formula.
[tex]q= (450.0 \ g)(1.264 \ J/g \textdegree C)(7.1 \ \textdegree C)[/tex]
Multiply the first 2 values together. The grams will cancel out.
[tex]q= 568.8 \ J/ \textdegree C (7.1 \ \textdegree C)[/tex]
Multiply again. This time, the degrees Celsius cancel out.
[tex]q= 4038.48 \ J[/tex]
4038.48 Joules of heat energy are released.
Is a shrimp an arachnid?
is a pill bug a insects, arachnid, or crustaceans?
is a scorpions a insects, arachnid, or crustaceans?
Answer:
Insects belong to the class Insecta, and arachnids to the class Arachnida; both classes fall under the Arthropoda phylum, along with crustaceans (crabs, lobster and shrimp). All arthropods have an exoskeleton and jointed legs. They have segmented bodies and appendages, which are divided into different segments. Arachnids belong to an even larger group of animals called “arthropods” which also include insects and crustaceans (lobster, crabs, shrimp, and barnacles).
Explanation:
The following diagram on the left represents the copper nitrate solution in the half‑cell before the galvanic cell starts to operate. In the following diagram on the right, draw a representation of the solution in the same half‑cell after the galvanic cell has been operating for some time and is still producing a voltage.
Before reaction : 4 Cu2+ molecules and 8NO3-
Answer:
There is too much here for me to attempt in one sitting, but I will get you started and give suggestions that may help you proceed on your own.
a) As far as I can tell, you didn't provide the reduction potentials in the table below. So, I looked them up and find them to be
Cu2+ +2e- ==> Cu(s) Eº = +0.34 V
Zn2+ + 2e- ==> Zn(s) Eº = -0.76 V
Net ionic equation: Cu2+(aq) + Zn(s) ==> Cu(s) + Zn2+(aq)
b) Eºcell = 0.34 V + 0.76 V = 1.10 V
c) ∆Gº = -nFEº where n = number of electrons transferred (2) and F = 96,485 C/mol e- and Eº = 1.1 V
d) Again, there is no diagram
e) same
f) Use the Nernst equation Ecell = Eºcell - 2.303RT/nF log Q where R = 8.314; T = Kelvin; F = Faraday const. and Q = reaction quotient, i.e. products/reactants
g) the cell voltage is an intensive property. That should help you answer this part of the question
Explanation:
its not much but i hoped this helped
4.6 moles of a gas are at a temperature of 325 K and a volume of 96.8 L, what is the pressure of the ga
Answer:
1.3 atm
Explanation:
Apply the ideal gas law: PV = nRT
Since we need to find the pressure, solve for pressure:
P = nRT / V
Plug in our given values of n = 4.6 moles, R = 0.08206 (ideal gas law constant using atm), T = 325 K, and V = 96.8 L:
P = 4.6(0.08206)(325) / 96.8 = 1.267 atm -> 1.3 atm (two significant figures)
When salt dissolves in water:
A. intermolecular forces in the solute are broken and new ion-dipole forces in the solution are formed
B. ionic bonds in the solute are broken and new intermolecular forces in the solution are formed intermolecular forces in the solute are broken and new intermolecular forces in the solution are formed
C. ion-dipole forces in the solute are broken and new ion-dipole forces in the solution are formed
D. ionic bonds in the solute are broken and new ionic bonds in the solution are formed
E. ionic bonds in the solute are broken and new ion-dipole forces in the solution are formed
F. ion-dipole forces in the solute are broken and new intermolecular forces in the solution are formed
G. intermolecular forces in the solute are broken and new ionic bonds in the solution are formed
H. ion-dipole forces in the solute are broken and new ionic bonds in the solution are formed
Answer:
ionic bonds in the solute are broken and new ion-dipose forces in the solution are formed
Explanation:
?
9. Oxygen will have a positive oxidation number
when combined with
(1) fluorine
(3) bromine
(2) chlorine
(4) iodine
in
Answer:
Flourine
Explanation:
Oxidation number will be +1 for oxygen and -1 for Flourine
In a chemical reaction, the mass of the reactants is 13.3 grams. Which of the
following could represent the mass of the products?
Answer:
26.6
Explanation:
In the combustion of octane, 2 C8H18 +25 O2 --> 16 CO2 + 18 H2O, if 376.0 liters of carbon dioxide formed at STP, then the volume of oxygen used was A. 587.5 L B. 240.6 L C. 839.3 L D. 299.1 L
Answer:
587.5 L (Option A)
Explanation:
The reaction is:
2 C₈H₁₈ + 25O₂ → 16CO₂ + 18H₂O
We know that in STP conditions 1 mol of any gas is contained in 22.4L
Then, we can make a rule of three, to determine the moles of produced carbon dioxide.
22.4L is the volume for 1 mol
376 L will be the volume for (376 . 1) 22.4 = 16.78 moles at STP conditions.
Stoichiometry is 16:25.
16 moles of CO₂ are produce by the reaction of 25 moles of O₂
Then, 16.78 moles of CO₂ were produced by (16.78 . 25) /16 = 26.2 moles.
Now, the rule of three again.
1 mol of oxygen gas is contained at 22.4L, at STP conditions
26.2 moles might be contained at (26.2 . 22.4)/1 = 587.5 L
I WILL Give BRAINLIST Unlike protists, organisms in the group Animalia
A
have cells with no cell wall and have an organ system.
B
have cells with a cell wall and are heterotrophic.
C
are complex and photosynthetic.
D
are all mobile and autotrophic.
Answer:
B
Explanation:
B
have cells with a cell wall and are heterotrophic
i need helpppp
blank 1:
blank 2:
blank 3:
blank 4:
Answer:
Fe₂(SO₄)₃ + 6KOH —> 3K₂SO₄ + 2Fe(OH)₃
The coefficients are: 1, 6, 3, 2
Explanation:
__Fe₂(SO₄)₃ + __KOH —> __K₂SO₄ + __Fe(OH)₃
To determine the correct coefficients, we shall balance the equation. This can be obtained as follow:
Fe₂(SO₄)₃ + KOH —> K₂SO₄ + Fe(OH)₃
There are 2 atoms of Fe on the left side and 1 atom on the right side. It can be balance by writing 2 before Fe(OH)₃ as shown below:
Fe₂(SO₄)₃ + KOH —> K₂SO₄ + 2Fe(OH)₃
There are 6 atoms of OH on the right side and 1 atom on the left side. It can be balance by writing 6 before KOH as shown below:
Fe₂(SO₄)₃ + 6KOH —> K₂SO₄ + 2Fe(OH)₃
There are 6 atoms of K on the left side and 2 atoms on the right side. It can be balance by writing 3 before K₂SO₄ as shown below:
Fe₂(SO₄)₃ + 6KOH —> 3K₂SO₄ + 2Fe(OH)₃
Now, the equation is balanced.
Therefore, the coefficients are: 1, 6, 3, 2
PLEASE HELP SOMEONE PLEASEEEE
Answer:
the answer is b
hope this helps you!!
Have a lovely day!
-millie :D
When two solutions are combined, what evidence would show a chemical
reaction has occurred? *
temperature remains constant
a precipitate forms
volume increases
When a substance was dissolved in water, the temperature of the water increased. This process is described as
A.
endothermic with the release of energy
B.
endothermic with the absorption of energy
C.
exothermic with the release of energy
D
exothermic with the absorption of energy
Answer: a,
endothermic with the release of energy
Food chains always begin with what type of organism? Why?
Order the terms according to the path followed by oxygen during cellular respiration.
Answer:
Outside air
Nose
Lungs
Bloodstream
Cell
Explanation:
We breathe in oxygen from the outside air in through our nose and it travels to our lungs. Inside our lungs, we have Avioli's that diffuse oxygen into our bloodstream and the bloodstream helps the oxygen travel into our cells.
Hope this helps :)
Respiration is the process of exchange of gases between the cell and atmosphere. The path of respiration involves Outside Air⇒ Nose⇒ Lungs⇒ Bloodstream⇒ Cell.
What is respiration?Respiration is the movement of oxygen from the outside environment to the cells and the removal of carbon dioxide from the cells into the outside environment.
Respiration is of two types depending upon the presence of oxygen:
1. Aerobic Respiration: This takes place in the presence of oxygen
2. Anaerobic Respiration: This takes place in the absence of oxygen.
The path of respiration includes inspiration of outside air into the nose, through the nostrils this air is passed on to the lungs. The alveoli is the site of gaseous exchange in the lungs. In the lungs, oxygen is inspired and carbon dioxide is expired.
The oxygen gas which is inspired by the lungs is dissolved in the blood. Oxygen forms a complex with the hemoglobin protein present in the blood. This blood is then circulated to all the cells and tissues of body. Thus, the oxygen is supplied to all the cells and tissues. The path includes Outside Air⇒ Nose⇒ Lungs⇒ Bloodstream⇒ Cell.
Learn more about Respiration here:
https://brainly.com/question/12605249
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acrostic words or phrases that describe street dance
All of the following explains why solar energy a better source of energy except:
Solar energy produces less toxic gas in the atmosphere.
Solar energy can be mined with less damage to ecosystems.
There is less environmental impact when collecting solar energy.
Solar energy is unlimited and easily captured from the Sun.
Answer:
Solar energy can be mined with less damage to ecosystems
Explanation:
solar energy isint mined, its collected and it is kinda bad for the environment when you mine the metals to get the solar panel
Calculate the molar mass
Answer:
52
Explanation:
When magnesium metal is burnt in air it reacts with both oxygen and nitrogen gses giving a white ash write to equatios for the reactions that take place
Answer:
See explanation
Explanation:
The most important thing to bear in mind when writing chemical reaction equation is that the equation must be balanced. A balanced chemical reaction equation is one in which the number of atoms of each element on the left and right hand sides of the reaction equation is exactly the same.
Equation of magnesium reaction with oxygen
2Mg(s) + O2(g) ------> 2MgO(s)
Equation of magnesium reaction with nitrogen
3Mg(s) + N2(g) ------> Mg3N2(s)
Which on is right O& Mg?
OMG
MgO
Mg2O2
Mg+2O-2
Answer:
MgO
is the correct answer
hope it helps
What is the normality of a 2.0 M NaOH solution?
Answer:
Normality= molarityX total POSITIVE oxidation number of solute Solvent=substance present in the greatest amount Solute= all other substances in the solution +1 (1 na+) is the total POSITIVE oxidation number of NaOH 2.0X1= 2.0 N=2.0
Explanation:
I had the same question on one of my assignments earlier
3.
Which quantity of salt will form an
unsaturated solution in 100 g of water
at 50°C?
(1) 43 g of KCI
(2) 50 g of NH4Cl
(3) 100 g of KNO,
(4) 116 g of NaNO,
Answer:
Option D, 116 g of NaNO3
Explanation:
An unsaturated solution is the one in which the amount of salt dissolved in more than the maximum amount of salt that can be dissolved in it.
At 50 degree Celsius, 37 grams of salt can be dissolved in 100 ml of water. Hence, 116 gram of salt is the correct answer
Someone help me please?
Why are some waves small and some large?
(◕‿◕✿) Hey There!
Answer → The Waves Size depends on ★ wind speed ★ , ★ wind duration★ , and the ★ area over which the wind is blowing ★
✨Hope This Helps!✨
can someone help me with this! because it have no idea what i’m doing feel free to solve anyone of these. THANK YOU
Answer:
1. 250 J
2. 500000 J
3. 146250 J
4. 400 J
Explanation:
1. Determination of the energy of the ball.
Mass (m) = 5 Kg
Velocity (v) = 10 m/s
Energy (E) =?
E = ½mv²
E = ½ × 5 × 10²
E = 2.5 × 100
E = 250 J
2. Determination of the energy of the rock.
Mass (m) = 250 Kg
Height (h) = 200 m
Acceleration due to gravity (g) = 10 m/s²
Energy (E) =?
E = mgh
E = 250 × 10 × 200
E = 500000 J
3. Determination of the energy of the car.
Mass (m) = 1300 Kg
Velocity (v) = 15 m/s
Energy (E) =?
E = ½mv²
E = ½ × 1300 × 15²
E = 650 × 225
E = 146250 J
4. Determination of the energy of the bullet.
Mass (m) = 0.005 Kg
Velocity (v) = 400 m/s
Energy (E) =?
E = ½mv²
E = ½ × 0.005 × 400²
E = 0.0025 × 160000
E = 400 J
Answer:
Sorry for the late answer but
Number 1 is 250 J
Number 2 is 500000 J
Number 3 is 146250 J
Number 4 is 400 J
Explanation:
How many atoms would be contained in 454 grams of iron?
Answer:
4.90 x 10 24 atoms
Explanation:
the 24 is the exponent for the 10
According to the law of conservation of matter, the number of_______is not changed by a chemical reaction
A. Molecules
B. bonds
C. products
D. atoms
Answer:
Atoms
Explanation:
According to the law of conservation of matter, matter is neither created nor destroyed, so we must have the same number and kind of atoms after the chemical change as were present before the chemical change.
How many grams of solid iron will be produced from 32.1 grams of iron (III) oxide? Hint: Balance the equation first
Answer:
22.45g of Fe will be produced
Explanation:
The balanced reaction is:
Fe₂O₃(s) + 3CO(g) → 2Fe(s) + 3CO₂(g)
Where 1 mole of Iron (III) oxide reacts with 2 moles of Iron
To solve this question we have to find the moles of iron (III) oxide. With these moles and the balanced reaction we can find the moles of iron produced and its mass:
Moles iron (III) oxide -Molar mass: 159.69g/mol-
32.1g Fe₂O₃ * (1mol / 159.69g) = 0.201 moles Fe₂O₃
Moles Iron:
0.201 moles Fe₂O₃ * (2mol Fe / 1mol Fe₂O₃) = 0.402 moles of Fe
Mass Fe -Molar mass: 55.845g/mol-
0.402 moles of Fe * (55.845g/mol) =
22.45g of Fe will be producedHow many poles does a magnet have?
2. Two glasses full of water are left out on a table over
night. Both glasses have a diameter of 10
centimeters, but one is twice as tall as the other.
Which glass do you expect to lose more liquid to
evaporation in a short amount of time?
A.The taller glass
B.The shorter glass
C.They both lose the same amount
D.No evaporation takes place
Answer: C
Explanation: The evaporation rate depends on the exposed surface of liquid as long as both glasses stay at the same temperature. Since both glasses have the same surface area, they should both evaporate at the same rate.
What is tugror pressure ,what causes it,and what does it do for a plant?
Answer:
Explanation:
Turgor pressure is the pressure forced or in other words, exerted onto the cell wall of the plant. It's caused by the movement of water into the cell. This causes the water to rush and burst into the cell, which increases the pressure onto the cell wall. Due to that, cell swells up, which helping the plant to stand upright and straight.
Hope this helps
Answer:
Turgor pressure is the pressure exerted on the cell wall of a plant. It is caused by the movement of water into the cell. ... This causes water to rush into the cell, increasing the pressure on the cell wall. The cell swells up, helping the plant to stand upright.