Answer:
Ver explicacion
Explanation:
Cuando el cilindro de 40 libras está conectado al cilindro de 100 libras, generamos una presión que continúa hasta que los dos cilindros alcanzan la misma presión de gas en equilibrio. Recuerde que el cilindro de 100 libras estaba inicialmente vacío. Esto significa que su presión inicial es 0. El cilindro de 40 libras ya estaba lleno, por lo que dividimos esta cantidad en dos para tener en cuenta su distribución entre los dos cilindros.
Ahora tenemos 20 libras de gas propano presentes en cada cilindro. La implicación de esto es que, en el cilindro de 100 libras, necesitamos 80 libras adicionales para completar las 100 libras.
Variables – this experiment tests how the temperature of water affects the time it takes for antacid tablets to dissolve. (they drop an antacid in hot water and one in cold water)
• What is the independent variable? (2 points)
• What is the dependent variable? (2 points)
Explanation:
You can think of independent and dependent variables in terms of cause and effect: an independent variable is the variable you think is the cause, while a dependent variable is the effect. In an experiment, you manipulate the independent variable and measure the outcome in the dependent variable.
Which term describes the members of the same species in an area. A.habitat. B.populatuon. C.indivdual. D.community
Answer:
B. population
hope this helps!
Answer:
community
Explanation:
The group of people living in the same place or having a particular characteristic in common.
A social group of any size whose members reside in a specific locality, share government...
Write the net ionic equation of HNO3+Fe--> Fe(HNO3)2 +H2
Answer:
nitric acid + iron=iron+[nitric acid ] 2 hydrogen
The net ionic equation will be Fe → [tex]Fe^{2+}[/tex].
What is net ionic equation?The net ionic equation would be a chemical equation which only indicates the elements, compounds, as well as ions instantly involved in a chemical reaction.
The given chemical equation is:
HNO3+Fe → Fe(HNO3)2 +H2
It can be written in term of ionic equation.
[tex]H^{+}[/tex] + [tex]NO_{3}^{-}[/tex]+Fe → [tex]Fe^{2+}[/tex] + [tex]H^{+}[/tex] + [tex]NO_{3}^{-}[/tex]
Hydrogen ion and nitrate ion will be canceled each other.
Hence, the net ionic equation will be
Fe → [tex]Fe^{2+}[/tex]
To know more about net ionic equation.
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Delta H for each reaction ty!
Answer:
Reaction 1 = -462.5 kJ/mol
Reaction 2 = -572 kJ/mol
Magnesium combustion = -601.83 kJ/mol
someone help ,, I'll give brainliest lolll .
Answer:
The last one
Explanation:
HELP PLSSS
A 2.5 L container holds a sample of hydrogen gas at 297 K and 120 kPa.
If the pressure increases to 330 kPa and the volume remains constant, what will the new temperature be?
Round your answer to one decimal place.
Answer:
T2 = 816.8 ( To one d.p)
Explanation:
Volume= 2.5 L
Initial Temperature T1 = 297 K
Initial Pressure P1 = 120 kPa
Final Pressure P2 = 330 kPa
Final Temperature T2 = ?
The relationship between pressure and temperature is given by the equation;
P1 / T1 = P2 / T2
T2 = P2 * T1 / P1
Inserting the values;
T2 = 330 * 297 / 120
T2 = 816.75 K
Which of the following describes an exothermic reaction?
An exothermic reaction is described by ΔH(reactants) is greater than ΔH( products) and the correct option is option A.
What is Exothermic reaction?The word exothermic means “releasing heat.” Energy, often in the form of heat, is released as an exothermic reaction proceeds.
Enthalpy of a reaction is defined as the heat energy change (Δ H) that takes place when reactants go to products. If heat is absorbed during the reaction, Δ H is positive; if heat is released, then Δ H is negative.
ΔH value negative –> energy released –> exothermic reaction
ΔH value positive –> energy absorbed –> endothermic reaction
Therefore, an exothermic reaction is described by ΔH(reactants) is greater than ΔH( products) and the correct option is option A.
Learn more about Exothermic reactions, here:
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Can someone help me please?
Answer:
SUN
Explanation:
Hope this helps! Plz mark as brainliest!
For the reaction
C2H2(g) + 3 O2(g) – 2 CO2(g) + 2 H2O(g)
What number of grams of CO2 could be produced from 2.0 g of C2H4 and 5.0 g of O2?
Answer:
3.3792 g
Explanation:
The balanced equation for the reaction is given as;
2 C2H2(g) + 3 O2(g) --> 2 CO2(g) + 2 H2O(g)
From the reaction;
2 mol of C2H2 requires 3 mol of O2
2.0 g of C2H2
Number of moles = Mass / Molar mass = 2 / 26.04 = 0.07680 mol
5.0 g of O2
Number of moles = Mass / Molar mass = 5 / 32 = 0.15625 mol
The limiting reactant is; C2H2
2 mol of C2H2 produces 2 mol of CO2
0.07680 mol produces x
Solving for x;
x = 0.07680 mol
Mass = Molar mass * Number of moles = 44 g/mol * 0.07680 mol = 3.3792 g
As a human being, we are considered to be a ..... because we rely on other organism for food
Answer:
As a human being, we are considered to be a heterotroph because we rely on other organisms for food.
Earthquakes are common at ocean-continent convergence zones but not ocean-ocean convergence zones. TRUE FALSE Check it
Answer:
FALSE
Explanation:
The earthquakes are common in both types of convergences is oceanic and continental and ocean to oceanic convergence. As the process of subduction takes places at the oceanic - oceanic boundary and resultant plate slide down other plate leading to recycling of the crust, volcanic eruptions and this leads to the formation of a volcanic arc, trenches, and faults.
Hydrogen gas and nitrogen gas are used to make ammonia (NH3). Calculate the rate of reaction if the concentration of hydrogen changed from 0.74 M to 0.088 M over 65
seconds
Answer:
(b) The change favors the reactants which has more gas molecules. ... Describe the effect of increasing the concentration of nitrogen gas or hydrogen gas inside the ... (c) The change causes an decrease in ammonia favoring the reactants. ... (c) Catalysts do not affect the equilibrium only the rate of reaction
Which of the following best support the claim that the cycling of matter and energy in Earth's interior affects
Earth's surface? Select all correct answers!!!!
A)Tectonic plates move together, apart, and past each other.
B)Lava can be observed rising to Earth's surface in some places.
C)The Earth's crust is much cooler than the Earth's interior.
D)The Earth's inner core is composed mostly of solid iron.
Answer:
am not sure but I think it c
Answer:
it’s A and B and the last one I still am trying to figure out.
Explanation:
Which of these describes the flow of energy as rock salt is dissolved in water?
Answer:
When salt dissolves in water, sodium and chloride ions are pulled apart to form new weak bonds with water molecules. Pulling them apart takes energy, while forming new bonds with the water molecules releases energy. Hope it helped (=^･ｪ･^=)
find the density of an object that has mass of 5kg and a volume of 50cm3
Answer:
100g/cm^3
Explanation:
density=mass/volume
convert mass in kg to g
1kg=1000g
5kg=5000g
therefore, density=5000g/50cm^3
=100g/cm^3
How many molecules of NaOH are in 23
moles of NaOH
Determine the empirical formula of a compound containing 63.50 % silver, 8.25 % nitrogen, and the remainder oxygen.
Answe AgNO₃
1:1:3 ratio
What is the identity of the element that has 19 protons and 22 neutrons?
Answer:
A titanium ion
The density of acetic acid is 1.05 g/mL. What is the volume of 327 g of acetic acid
Answer:
[tex]311.43\ \text{mL}[/tex]
Explanation:
[tex]\rho[/tex] = Density of acetic acid = [tex]1.05\ \text{g/mL}[/tex]
[tex]m[/tex] = Mass of acetic acid = [tex]327\ \text{g}[/tex]
[tex]V[/tex] = Volume
Density is given by
[tex]\rho=\dfrac{m}{V}\\\Rightarrow V=\dfrac{m}{\rho}\\\Rightarrow V=\dfrac{327}{1.05}\\\Rightarrow V=311.43\ \text{mL}[/tex]
The volume of acetic acid is [tex]311.43\ \text{mL}[/tex].
How does the radius of the central atom affect the boiling points of Group 16 halides?
A buildup of charges in an object is called
Answer:
Static Electricity.
Explanation:
Static electricity is defined as 'an electric charge that has built up on an insulated body, often due to friction.' It is an outcome of the disparity among the positive, as well as, negative charges residing in a body or object and causes the charge to build up on the surface of the body. The accumulation of electric charges on the objects like wool, hair, silk, plastic, etc. causes them to possess static electricity. These charges stay on the surface until it is discharged or released through a source. Thus, 'static electricity' is the correct answer.
can someone help ill give 30 extra points if its right
Answer:
sweating
Explanation:
why do I need 20 words
Number 10 plz I will brainly
Answer:
3 m/s²
Explanation:
First, find the change in velocity.
13 - 1 = 12
Divide the change in velocity by the time it took to cross this distance.
12/4 = 3
3 m/s² is the average acceleration of the lizard.
Please help. I am putting the rest of my points on this because i need this completed. see attached file
Answer:
balanced equation of glucose
6CO2 + 6H2O----------C6H12O6 + 6O2
in the presence of sun light.
A 17.5 ml sample of an acetic acid (ch3co2h) solution required 29.6 ml of 0.250 m naoh for neutralization. the concentration of acetic acid was __________ m.
Answer:
0.423M
Explanation:
The reaction of acetic acid with NaOH is:
CH₃CO₂H + NaOH → CH₃CO₂Na + H₂O
That means the moles of NaOH added = Moles acetic acid in the solution
To solve this problem we need to find the moles of NaOH added to find the moles of acetic acid and its concentration using its volume as follows:
Moles NaOH:
29.6mL = 0.0296L * (0.250mol / L)= 0.0074 moles NaOH = Moles acetic acid
Molarity acetic acid:
0.0074 moles / 0.0175L =
0.423M5. What kind of model is represented in the image below?"
A. mathematical
B. physical
C. virtual
Answer:
virtual
Explanation:
because we cannot touch or sense it
The heating curve shows the energy gain of a substance as it changes from solid to gas. Which section of graph shows the liquid phase of a substance gaining kinectic energy ?
Answer:
section c
Explanation:
section A shows the soild state
section B shows the transition of solid to liquid
section C shows the the pure liquid state
section D shows the transition of liquid to gas
section E shows the pure gas state
What medium do selsmic waves travel through?
A
The alr
B
The ground
C
Water
D
Outer space
someone help ,, I'll give brainliest lolll .
Answer:
toxic substances to humans
Explanation:
Answer:
Toxic substance to humans
Explanation:
Lead is a naturally occurring element found in small amounts in the earth’s crust. While it has some beneficial uses, it can be toxic to humans and animals, causing health effects.
PLEASE HELP ME EASY
List three household products that should go to a secure landfill site instead of regular sanitary landfill.
Answer:
plastic, glass, and electronics
Explanation:
those take longer to erode than normal trash.