What mass of propane (C3H8) must be burned in a barbecue grill to release 4560 kJ of heat?
Answer:
The answer is "[tex]\bold{90.62 \ g \ C_3H_8}[/tex]".
Explanation:
Write a balanced thermochemical formula for both the combustion with one mole of [tex]C_3H_8[/tex]
[tex]C_3H_8\ (g) +5 O_2 \ (g)\longrightarrow 3 CO_2 \ (g) +4H_2O \ (l)\ \ \ \ \ \ \ \ \Delta H_{comb} = -2219 \frac{kj}{mol}[/tex]
Calculating the molar mass of [tex]C_3H_8[/tex] .
[tex]3 (12.0107 \frac{g}{mol}) +8 (1.0079 \frac{g}{mol})= 44.0953 \frac{g}{mol}[/tex]
1) Start with both the energy released.
2) Just use molar enthalpy of [tex]C_3H_8[/tex] as just a balanced equation to transfer kilojoules to birthmarks of [tex]C_3H_8[/tex] .
3) It use molarity of [tex]C_3H_8[/tex] as a balanced equation to transfer caterpillars of [tex]C_3H_8[/tex] to ounces of [tex]C_3H_8[/tex] .
[tex]= -4560 \ kJ \ \ \ \ \frac{1 \ mol C_3H_8}{-2219 \ kJ} \ \ \ \ \frac{44.0953 \ g \ C_3H_8}{1 \ mol \ C_3H_8}\\\\ = 90.62 \ g \ C_3H_8[/tex]
due is 10 min please help
Answer:
its c hope this helped;)
Explanation:
We can change the substance chemically by
freezing it.
True or false
1. Ria gave directions to the meeting spot, using the large
oak tree as a(n) displacement.
Answer:
geruow0irghvn3p0unhie0ghik
Explanation:
The process of wearing down by friction-like sand blasting is called
O exfoliiation
O erosion
O Wind Abrasion
O deposition
Answer:
Erosion
Explanation:
Abrasion is a process of erosion which occurs when material being transported wears away at a surface over time. It is the process of friction caused by scuffing, scratching, wearing down, marring, and rubbing away of materials. ... Objects transported in waves breaking on coastlines cause abrasion.
Luther accidentally spilled his chemicals, and they splashed onto his arm and legs. Which piece of equipment should he use?
safety shower
eyewash station
fire blanket
fire extinguisher
Answer:
safety shower
Explanation:
its on his body, not his eyes, and fire safety wont help here.
how many total atoms are in 3(SO)4
Answer:
17 atoms are in 3(SO)4
Explanation:
Is tomato juice a solution? state a reason for your answer.
Answer:
yes tomato juice is a solution. because it is homogenous mixture and it's ingredient dissolve in water.
Solutions are made of a solute and a solvent. Tomato juice is solution since it contains the tomato pulp and water which can be mixed well.
What is a solution?A solution is a combination of a soluble or insoluble salt and a solvent like water. There are homogenous solutions and heterogenous solutions. In the homogenous solutions the solute is completely soluble in the solvent and both exists in one phase.
In heterogenous solutions, the solute form a different phase from the solvent and appear immiscible. The components can be mixed well using stirring methods.
Tomato juice is made by the tomato pulp and water. The pulp and water is mixed well to form the juice and it appear to be one solution
Therefore, tomato juice can be considered as a solution.
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can someone describe what's a niche of a giraffe is
Answer: The niche of an organism is the role it plays in it's environment. With the giraffe's long neck, it doesn't have to compete with others and therefore lives harmoniously with other animals! (^-^)
Hope this helps!
if a substance has a PH of 9 is it an acid, base or nutral.
Answer:
At nine, it can still count as neutral.
Explanation:
The ph scale goes from 0 (acid) to 14 (alkaline/base). The middle would be seven, which is neutral. Nine has more alkalinity than a true neutral, but I believe it is close enough to the middle to not count as a base.
Match each type of rock with the way it is formed
Answer:
Uh do you have a picture that can help us answer this question...
Explanation:
A wave is a _____that transfers _____ through a ______
A.) medium, disturbance, energy
B.) disturbance, energy, medium
C.) energy, disturbance, medium
D.)disturbance, medium, energy
A wave is a disturbance that transfers energy through a medium. There
are types of such as sound and light waves.
A wave involves the transfer of energy such as sound, light waves etc
through a medium. The medium could be through liquids , solids or air and
they have characteristic waves which pass through them.
When a wave transfers energy through a medium, the matter involved
doesn't experience any type of movement.
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Define Triple point of water?
Triple point is that temperature, at which the substance is found in all three states i.e. solid, liquid and gas. Every substance has different triple point, because Triple point is just above the freezing point and each substance has different freezing and boiling point.
_____________________________________WATER:Water has a Melting point or Freezing Point (MP or FP) of [tex]0^0[/tex] C or 273K and Boiling point (BP) [tex]100^{0}[/tex] C or 373 K. Since the triple point is just above the MP or FP thus Triple Point of water is [tex]0.01^{0}[/tex]C or 273.16K.
_____________________________________Best Regards,'Borz'Answer:
0.01 degrees centigerade
Explanation:
Plants make their own food and are not required to consume food for energy. Into which category does this characteristic cause plants to be assigned?
Answer:
Autotrophic or Producers
Explanation:
They are often called producers because they make their own food.
A neutral atom contains 12 neutrons and 11 electrons. The number of protons in this atom is
(1) 1 (3) 12
(2) 11 (4) 23
Answer:
1
Explanation:
Help me please!! :D
Answer: Solar eclipse
Explanation:
We breathe it out and it takes it in. Your next clue is where photosynthesis begins.
Answer:
Carbon Dioxide?
Explanation:
When we take a breath, we pull air into our lungs that contains mostly nitrogen and oxygen. When we exhale, we breathe out mostly carbon dioxide.
Name four amino acids. (site 2)
Answer:
phenylalanine, threonine, tryptophan, and valine. Srry I have these memorized.
What is the wavelength of a light of frequency 4.47 x 1014 Hz?
Answer:
The correct answer is 671nm because if you multiply 4.47 times 1014 Hz the answer would be 671nm.
Explanation:
Answer:
A. 671 nm
Explanation:
A P E X
Why is the
chemical formula for sodium
chloride NaCl, and not NaCI6
or Na6CI
Answer: NaCl
Explanation:
Here You Go :)
What is an alloy?
Answer question 2 if you want.
Answer:
An alloy is a combination of metals or metals combined with one or more other elements. For example, combining the metallic elements gold and copper produces red gold, gold and silver becomes white gold, and silver combined with copper produces sterling silver. Elemental iron, combined with non-
Explanation:
that's what an alloy is all the rocks including gold silver combined with copper and sterling silver
Which of the following interactions would be the strongest?
A. H2O and CH4
B. CH4 and CF4
C. H2O and HBr
D. HBr and CH4
Answer:
i think is c,my ans will not be 100%correct
PLEASE HELP ME WITH THIS !!!!
Which type of bond usually forms between two non metals
how can you test a sample of soil for acidity or alkalinity
Answer:
Scoop a soil sample into a fresh container, add 1/2 cup of water, and mix. Then, add 1/2 cup of baking soda. If the soil bubbles or fizzes, the soil is acidic. The reaction you're seeing is the result of acidic soil coming into contact with an alkaline substance (baking soda).
Explanation:
Hope this helped!
Dalton thought that the atoms of each element were the same. We
now know that elements can have different atoms, for example,
chlorine has two different atoms, 35Cl and 7 C.
What name is given to different types of atom of the same element?
Answer:
molecule
Explanation:
A molecule is formed from two or more atoms
The temperature of the water vapor (H,0) inside a pressure cooker increased from 295 K to 395 K. AS
the sample is heated, the pressure of the water vapor went from 21.0 kPa to
Answer:
P₂ = 28.12 KPa
Explanation:
Given data:
Initial temperature = 295 K
Final temperature= 395 K
Initial pressure = 21.0 KPa
Final pressure = ?
Solution:
According to Gay-Lussac Law,
The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.
Mathematical relationship:
P₁/T₁ = P₂/T₂
Now we will put the values in formula:
21.0 KPa / 295 K = P₂/395 K
P₂ = 21.0 KPa× 395 K / 295 K
P₂ = 8295 KPa. K /295 K
P₂ = 28.12 KPa
how many moles of copper particles are there in 20 g of copper
Answer:
10 copper moles per copper
ill give brainlist if its right. The particles in a low sound vibrate SLOWER than particles in a high sound.
Question 5 options:
True
False
They vibrate slower.
Answer:
true
Explanation:
When you climb to the top of a water slide, you are gaining:
O A. gravitational kinetic energy.
B. chemical potential energy.
c. gravitational potential energy.
D. chemical kinetic energy.
Answer:
C
Explanation:
You climbing the water slide gives you potential energy and your building gravitational eneergy.
When we climb the top of a water slide we are gaining gravitational kinetic energy. That is we are moving through the surface and thus we experience both kinetic energy and gravitational energy.
What is kinetic energy?Kinetic energy of a body is generated by virtue of its motion. Gravitational energy is a form of energy by which the an object attracts other object to its center of mass. Both forms of energy are directly proportional to the mass of the object.
Potential energy is generated by virtue of the position and height of the object. As the height from surface increases, potential energy increases. Potential energy and kinetic energy together called as mechanical energy of an object.
When starts moving our potential energy is converting to kinetic energy. Hence, when we climb the top of a water slide kinetic energy starts to increase. Thus, option A is correct.
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