Answer: If a reaction releases 675,000 Joules then it means it releases 161.328872 kcal.
Explanation:
According to the standard conversion,
[tex]1 Joule = 0.000239006 kcal[/tex]
Therefore, 675,000 Joules will be converted into kcal as follows.
[tex]1 Joule = 0.000239006 kcal\\675,000 J = 675000 J \times \frac{0.000239006 kcal}{1 J}\\= 161.328872 kcal[/tex]
Thus, we can conclude that if a reaction releases 675,000 Joules then it means it releases 161.328872 kcal.
1. Three fluids are poured from a beaker onto a lab table. Fluid A hits the table in 10 seconds, fluid B in 12 seconds, fluid C in 4 seconds, and fluid D
in 15 seconds. Which fluid has the highest viscosity?
O a fluid A
O b. fluid B
O c. fluid c
O d. fluid D
Answer:
fluid D
Explanation:
Fluid D has the highest viscosity because it is more difficult for it to move which makes it hit the table at 15 seconds
while fluid C has the lowest Viscocity which makes it move easily and it hit the table fastest
Difine the term compound
Answer:
Its when like two pure substances are like combined into one.
Explanation:
A 4.00g sample of gas is found to exert a pressure of 1.71 atm when confined in 3.60L container at a temperature of 24
Answer:
There are 0.311 moles of gas in the tank
Explanation:
Complete question
A 4.00g sample of gas is found to exert a pressure of 1.71 atm when confined in 3.60L container at a temperature of 241 K. Find the number of moles of the gas
Solution
As we know
[tex]PV = nRT[/tex]
where P is the pressure of the gas in atm
V is the volume in liters
n is the number of moles
R is the gas constant = 0.08206 L·atm/K·mol
and T is the temperature in Kelvin
Substituting the given values in above equation, we get -
[tex]1.71 * 3.60 = n * 0.08206 * 241\\n = 0.311[/tex]
There are 0.311 moles of gas in the tank
Comprehension Questions:
1. What are the horizontal (from left to
right) parts of the periodic table
called?
What is the correct term for a community of plants and animals and their physical surroundings?
individuals (organism)
continent
territory
ecosystem
A3.00 mol sample of CO2 (g) is in a rigid 6.00 L container at 400.°C.
Which of the following is the pressure of the gas?
16.4 atm
27.6 atm
200. atm
995 atm
Answer:
i'm thinking 27.6 not sure
Explanation:
A venti latte (502mL) contains 0.322g caffeine, C8H10N4O2, express this concentration in molarity.
Answer:
0.00331M
Explanation:
Molarity of a solution can be calculated as follows:
Molarity = number of moles (n) ÷ volume (V)
In the information provided in this question, the volume = 502mL = 502/1000 = 0.502L, mass of caffeine = 0.322g
Molar mass of caffeine (C8H10N4O2), where C = 12, H = 1, N = 14, O = 16 is as follows:
Molar mass = 12(8) + 1(10) + 14(4) + 16(2)
= 96 + 10 + 56 + 32
= 194g/mol
Using, moles = mass/molar mass
moles = 0.322/194
moles = 1.66 × 10-³ moles
mole = 0.00166mol
Molarity = number of moles ÷ volume
Molarity = 0.00166mol ÷ 0.502L
Molarity = 0.00331M.
What makes a nucleus stable?
A. A nucleus is stable if all of the electrons are in the lowest energy
levels.
B. A nucleus is stable if there are fewer neutrons than protons in the
nucleus.
C. A nucleus is stable if the electrostatic and strong nuclear forces
balance out
D. A nucleus is stable if there is the same number of protons as
electrons.
SUB ցիկ
The stable nuclei can be identified if the count of proton and neutron are same then nuclei will be stable.
What is stable Nuclei?That kind of nuclei which posses identical number of proton and neutron as well can be referred as stable nuclei. For example: The isotope of carbon [tex]C^{12}[/tex] has 6 proton and 6 neutron as well. Hence it might be considered as stable nuclei.
What is proton?A hydrogen atom's nucleus contains positively charged protons. Protons, electrons, as well as neutrons, make up an atom.
To know more about stable nuclei click here.
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How much more heat does it take to vaporize 1 mole of ethanol than to melt it?
Answer:
I do not know how to solve this bit i THINK 38.56
Explanation:
What is the SI unit of length
4 points
Foot
Mile
Meter
Kilometer
Answer:
Answer is meter. ~~~~~~
a compound is 43.7 phosphorus and 56.3 oxygen formula mass is 284 calculate emperical formula and molecular formula
Answer:
the molecular formula of a compound is P₄O₁₀.
M(P₂O₅) = 2 · Ar(P) + 5 · Ar(O) · g/mol.
M(P₂O₅) = 2 · 31 + 5 · 16 · g/mol.
M(P₂O₅) = 142 g/mol; molar mass of empirical formula.
M(PₓOₙ) = 284 g/mol; molecular mass of unknown compound.
M(PₓOₙ) : M(P₂O₅) = 284 g/mol : 142 g/mol.
M(PₓOₙ) : M(P₂O₅) = 2 : 1.
Explanation:
The empirical formula is [tex]P_{2}O_{5}[/tex] and The molecular formula is [tex]P_{4}O_{10}[/tex]
How to find the empirical and molecular formula? Convert each elements in grams to its amounts in moles.[tex](\frac{47.3g}{1})( \frac{1 mol}{30.97g})= 1.41 moles[/tex] of Phosphorus.
[tex](\frac{56.3}{1})(\frac{1 mol}{16}) = 3.51 moles[/tex] of Oxygen
Divide each resulting values by the smallest of these values.3.51/1.41 = 2.49 (rounded off 2.5)
1.41/1.41 = 1
Multiply these numbers with integers to get whole numbers.2.5 *2 = 5 (Oxygen)
2 *1 = 2 (Phosphorus)
Hence [tex]P_{2}O_{5}[/tex] is Empirical formula
and [tex]P_{4}O_{10}[/tex] is Molecular Formula
Learn more about Empirical and molecular formula here
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Europe and United States use geothermal power extensively.
True
False
Answer:
True
Explanation:
US. With an installed capacity of 3,639MW in 2018, the US is the leading producer of geothermal energy across the world, producing 16.7 billion kilowatt hours (kWh) of geothermal energy throughout the year. More recently, extensive direct heat utilization projects have been undertaken in many European countries, and electric power developed extensively in Italy and Iceland. Geothermal heat pumps became extensively used in Austria, Switzerland, Germany and Sweden (Antice, Miklos and Sanner, Burkhard, 2007).
This video allows us to see the circuit inside a flashlight. After watching the video, write notes in the space provided so that you can build the circuit in question 2.
https://app.edmentum.com/content-delivery//resource/b79af08f-5dcb-48ad-a6f5-f2c6d1e8f518
Answer:The video shows the electric circuit inside a flashlight. The battery provides power to the circuit. A metal strip is connected to the negative end of the battery. When the flashlight’s switch is pressed, the metal strip moves forward. It touches the metal connected to the bulb near the front. This motion closes the circuit, which creates a path for the electricity and causes the bulb to glow.
Explanation: plato
The electric circuit within a flashlight is powered by the battery. See below for more information.
What is a circuit?A circuit is a route that allows an electrical current to flow between two or more paths.
An electronic circuit comprises electronic components such as resistors or diodes joined by a metallic wire that conducts electricity and through which current flows.
From the video in the content;
The electric circuit within a flashlight is powered by the battery.The negative end of the battery is attached to a metal strip. There, the metal strip begins to move forward once the flashlight's switch is pressed. It comes into contact with the metal that is closely connected to the bulb close to the front. This action completes the circuit, allowing the electricity to flow and causing the bulb to light up.Learn more about the circuit here:
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Breaking down rock through chemical changes?
Another type of weathering that attacks rocks is chemical weathering, a process that breaks down rock through chemical changes. The causes of chemical weathering include action of water, oxygen, carbon dioxide, living organisms, and acid rain. Chemical weathering can produce new minerals as it breaks down rock.
Explanation:
PLEASE I NEED HELP ILL GIVE BRAINLYEST
What percentage increase did CO2 experience from 1800 to 2004 AD?
The percentage of CO2 increased 48 percent. Hope this helped!
If you wanna get oil to 180 celcius when it starts at 20 how many units of thermal energy is needed?
Answer:
The thermal energy (heat) needed, to raise the temperature of oil of mass 'm' kilogram and specific heat capacity 'c' from 20°C to 180°C is 160·m·c joules
Explanation:
The heat capacity, 'C', of a substance is the heat change, ΔQ, required by a given mass, 'm', of the substance to produce a unit temperature change, ΔT
∴ C = ΔQ/ΔT
ΔQ = C × ΔT
C = m × c
Where;
c = The specific heat capacity
ΔT = The temperature change = T₂ - T₁
∴ ΔQ = m × c × ΔT
Therefore, the thermal energy (heat) needed, ΔQ, to raise the temperature of oil of mass 'm' kilogram and specific heat capacity, 'c' from 20°C to 180°C is given as follows;
ΔQ = m × c × (180° - 20°) = 160° × m·c
ΔQ = 160·m·c joules
A solution contains 23 ppm of dissolved oxygen in 242.0066 ml of solution. What is the mass of oxygen?
Answer:
Mass of Oxygen is equal to 0.005566 grams
Explanation:
As we know,
ppm=(grams of solute/grams of solution)*1,000,000
Substituting the given values, we get -
23 ppm = (grams of solute/242.0066 grams)*1,000,000
1 ml = 1 gram
On solving the above equation, we get -
grams of solute = (23 * 242.0066)/1,000,000
= 0.005566 grams
Mass of Oxygen is equal to 0.005566 grams
The water released by the reaction (mass = 0.00020 g) was calculated as was the
heat energy released (-9.6 x 10 kJ). Given the information you have about the 5
accelerants, see if you can determine which liquid is the accelerant under the
threshold.
1. Acetone:
C3H60+
02-
CO2 +
H20 ΔΗ =
2. Coleman Fuel:
C5H12 +
02-
CO2 +
H20 ΔΗ =
3. Ethyl alcohol
C2H60 +
02 -
CO2 +
H20 ΔΗ =
4. Mineral Spirits:
C10H22 +
02-
CO2 +
H20 AH =
5. Turpentine:
C10H16 +
02 -
CO2 +
H20 ΔΗ =
The accelerant used was
I
which is commonly found in:
The ocean pressure at the depth of the Titanic wreck is 400 atm . Calculate the ocean pressure in kpa?
A)3.00 × 10^4 kPa
B)4.05 × 10^4 kPa
C)4.05 × 10^3 kPa
D)4.05 × 10^2 kPa
Answer:
4.05 × 10⁴ kPaExplanation:
To find the pressure in kPa we use the conversion
1 atm = 101.3 kPaIf 1 atm = 101.3 kPa
400 atm = 400 × 101.3 = 40520 kPa
Expressing it in standard form we have the final answer as
4.05 × 10⁴ kPaHope this helps you
Answer: 3.04 x 10 mm Hg
Explanation:
The blades of a wind turbine are at rest until the movement of air causes the blades to spin.
Which energy transformation happens when the blades are spinning as shown?
Answer:
C
Explanation:
First there is no chemicals involved so cross out B and D. Wind turbines are made to create energy not to convert it so A is crossed out as well. The remaining answer is C.
The energy is transformed from mechanical to electrical when the blades are spinning, as shown.
What are wind turbines?
Wind turbines are large fans that convert the kinetic energy of wind into electrical energy.
The blades run by winds and generate electricity.
They are helpful, but they are a threat to birds and bats.
Thus, the correct option is C, mechanical to electrical energy.
Learn more about wind turbines
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Estructura correcta de los siguientes compuestos e indique si el nombre está escrito de forma correcta; 1,4-ciclohexadieno
Answer:
En la imagen adjunta.
Explanation:
¡Hola!
En este caso, dados los lineamientos IUPAC que tenemos en cuenta para dibujar la estructura de hidrocarburos cíclicos, para el 1,4-ciclohexadieno, es posible determinar que esta estructura viene dada por hexágono que representa el ciclohexano y dos dobles enlaces en los carbonos 1 y 4 al ser un dieno. Por lo anterior, en la imagen adjunta, puede encontrar la estructura requerida.
¡Saludos!
please help i have 2 min to complete
What is the specific heat of a metal if 298.0 grams of the metal causes 300.00 grams of water to increase in temperature from 35.0°C to 48.8°C? (The original temperature of the metal was 95.6°C; its final temperature was 48.8°C.)
Answer:
Suppose a piece of iron with a mass of 21.5 g at a temp of 100.0 °C is dropped into an insulated container of water. The mass of the water is 132.0 g and its temperature before adding the iron is 20.0 °C. What will be the final temp of the system? Specific heat of iron is 0.449 kJ/kg K.
Solution:
1) Since
qlost, metal = qgained, water
we write
(mass) (Δt) (Cp, metal) = (mass) (Δt) (Cp, water)
2) Substituting:
(21.5) (100 − x) (0.449) = (132.0) (x − 20) (4.184)
Some explanation:
a) 100 − x is the Δt for the metal; it starts at 100.0 °C and drops to some unknown, final value.
b) x − 20 is the Δt for the water; it starts at 20.0 °C and rises to some unknown, final value.
c) Since both metal and water wind up at the same ending value, we need to use only one unknown for the two Δt expressions.
3) A wee bit of algebra:
(2150 − 21.5x) (0.449) = (132x − 2640) (4.184)
965.35 − 9.6535x = 552.288x − 11045.76
561.9415x = 12011.11
To 3 sig figs, the answer is 21.4 °C.
Explanation:
hope its correct!
Please help me out here please
you have a gas that has a pressure of 2 atm and a volume of 10L. what would be the new volume if the pressure was changed to 1atm?
Answer:
20 Liters
Explanation:
Boyles Law => ΔP ∝ 1/ΔT => P₁V₁ = P₂V₂ => V₂ = P₁V₁/P₂
P₁ = 2 atm
V₁ = 10 Liters
P₂ = 1 atm
V₂ = ?
V₂ = 2atm x 10L / 1atm = 20 Liters
please help me with this chem question!!
Answer:
caca123
Explanation:
UM
Great Sand Dunes National Park in Colorado is famous for its giant sand dunes. Sand dunes are landforms that are found in deserts and on beaches. Visitors to the park can surf down the dunes on sleds or boards.
Which process causes the shape of these giant dunes?
A. deposition
B. erosion
C. weathering
D. waves
Pt3 science......
Select correct answer ♡ !
Answer:
Neon
(if you want a thorough explanaion, just ask for one)
It is C! <3
The reason it's C because pt3 is Sugar science name get it?
Which of the following creates greenhouse gases during the generation of electricity?
Answer:
carbon dioxide makes up the variety of greenhouse gas emission from the sector but smaller amount of methane nitrous oxide are also emmited and all these gases are released during the combustion of fossil fuels, such as coal,oil and natural gas, to produce electricity
TRUE OR FALSE
Astronomers use spectroscopes to identify elements in stars because each element produces
unique emission spectrum
Answer:
True!
Explanation:
A spectrum is simply a chart or a graph that shows the intensity of light being emitted over a range of energies. Have you ever seen a spectrum before? Probably. Nature makes beautiful ones we call rainbows. Sunlight sent through raindrops is spread out to display its various colors (the different colors are just the way our eyes perceive radiation with slightly different energies).
Hope i helped!