Answer: 0.859 atm
Explanation:
Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.
The combined gas equation is,
[tex]\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}[/tex]
where,
[tex]P_1[/tex] = initial pressure of gas (STP) = 1 atm
[tex]P_2[/tex] = final pressure of gas = ?
[tex]V_1[/tex] = initial volume of gas (STP) = 10.0 L
[tex]V_2[/tex] = final volume of gas = 12.5 L
[tex]T_1[/tex] = initial temperature of gas (STP) = 273K
[tex]T_2[/tex] = final temperature of gas = [tex]20.0^0C=(273+20)K=293K[/tex]
Now put all the given values in the above equation, we get:
[tex]\frac{1\times 10.0}{273}=\frac{P_2\times 12.5}{293}[/tex]
[tex]P_2=0.859atm[/tex]
Thus at 0.859 atm , same sample have a volume of 12.5 L and a temperature of [tex]20.0^0C[/tex]
what is a controlled variable for ionic bonds and covalent bonds?
Answer:
controlled variable is a variable that is kept constant during a controlled experiment and covalent bond is a chemical bond formed when two atoms share electrons.
Explanation:
How many grams of water are produced when 2.50 mol oxygen reacts with hydrogen?
H2 + O2 + H2O
Select one:
a. 45.0 g
b. 22.5 g
c. 90.0 g
O d. 3.6 g
PLEASE HELP
Answer:
it is 90.0
Explanation:
? Question
Select the correct answer.
Which statement about mass wasting is correct?
O Mass wasting is rocks moving downhill.
o Earthquakes cause all mass wasting.
O Gravity drives all mass wasting.
O All mass wasting happens on mountains.
Answer:
Gravity drives all mass wasting.
Explanation:
Mass wasting can be defined as the process of wasting away of earth's outer crust. This movement is also known as slope movement that causes large rock, soil, and debris to move downward, a force driven by gravity.
The term is often used interchangeably with landslide yet it is different. It is also known as mass movement as is cause massive downslope movement of rock, regolith, snow, ice, and-the-like on the earth's outer crust.
All these movements are driven mainly by gravity. Gravity consantly tries to pull the rocks and soil down the slope but the resisting power. also known as shear strength, of moutains helps them to deny the gravitional force.
Thus from the given options the statement that can be said to be true about mass wasting is that mass wasting is driven by gravity. So, the correct option is C.
Answer:
C. Gravity drives all mass wasting.
Explanation:
Plato answer
The reaction of hydrogen with oxygen produces water.
2H2(g) + O2(8) - 2H2O(g)
a. How many moles of O2 are required to react with 2.6 mol
of H2?
b. How many moles of H, are needed to react with 5.0 mol
of O2?
c. How many moles of H2O form when 2.5 mol of O2
reacts?
plz help!!!
some iron filings were shaken with some copper (II) sulfate solution. The ionic equation for the reaction is :
[tex]Fe(s) + {Cu}^{2 + } (aq) = > {Fe}^{2 + } (aq) + Cu(s)[/tex]
a)write down any one change that you would observed during this reaction
b)which substance has been oxidized in this reaction
c) write down the full (not ionic) equation for this
a) The change here is that metallic iron is converted into ions and copper is deposited. This is called a displacement reaction.
b) [tex] \text{Fe}[/tex] is oxidised in this reaction.
c)$ \mathrm{Fe_{(s)}+ CuSO_{4(aq)} \rightarrow FeSO_{4(aq)} + Cu_{(s)}}$
A formula unit of an ionic compound
Select one:
a. is an independent unit that can be isolated and studied.
O b. is the simplest ratio of ions that balances total charge.
O c. describes the crystal lattice.
O d. all of the above
please help
Answer:
b. is the simplest ratio of ions that balances total charge.
Explanation:
Hope it helps.
We can see here that a formula unit of an ionic compound is: b. is the simplest ratio of ions that balances total charge.
What is ionic compound?An ionic compound is a type of chemical compound that is formed through the bonding of ions, which are charged particles. These compounds are made up of positively charged ions, known as cations, and negatively charged ions, known as anions, which are held together by electrostatic forces of attraction.
Ionic compounds play significant roles in various applications, including inorganic chemistry, materials science, and industrial processes.
Thus, Option B is the correct answer.
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4. A chemical reaction has the equation 2NaCl (aq) + F2 (g) + 2NaF (s) + Cl2 (g). What type of reaction occurs between NaCl and F2?
A. Double displacement
B. Single displacement
C. Synthesis
D. Decomposition
A chemical reaction has the equation 2NaCl(aq) + F₂ → 2NaF(s) + Cl₂ (g). The reaction type occur between NaCl and F₂ is Single displacement.
Hence, Option (B) is correct answer.
What is a Chemical reaction ?A chemical reaction is a process in which chemical bonds between atoms to break and reorganize, to form other new substances.
Now lets check all options one by one
Option (A): Double displacement
A double displacement is a chemical reaction in which elements are exchange between the two compounds. In the given reaction F₂ is not a compound. so this reaction cannot occur
Hence, option (A) is incorrect.
Option (B): Single displacement
A Single displacement reaction is a chemical reaction in which one element replaces the another element in a compound.
In the given reaction F₂ element replaces with the element Na in a compound NaCl. So this reaction occur.
Hence, option (B) is correct.
Option (C): Synthesis
A synthesis reaction is a chemical reaction where two or more substances react to produce a new compound.
In the given reaction two products are formed NaF which is a compound and Cl₂ which is element. So this reaction cannot occur.
Hence, option (C) is incorrect.
Option (D): Decomposition
A decomposition reaction is a chemical reaction in which one reactant breaks down to form a two or more products.
In the given reaction two reactants are given NaCl and F₂. So this reaction cannot occur.
Hence, option (D) is incorrect.
Thus, from above conclusion we can say that The reaction occurs between NaCl and F₂ is single displacement reaction.
Hence, Option (B) is correct answer.
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Which lifestyle is most likely to lead to infertility in a male ?
A man who works as a mechanic
A man who works as a computer programmer and sits at desk magority of the day
A semi professional athlete
A man who works for a company’s that applies pesticides to lawns
Answer:
The second on, A man who works as a computer programmer and sits at desk magority of the day.
Explanation:
Answer:
Explanation:
The only answer I can think as being possible is the last one. Pesticides are chemicals that go after unwanted animal life. They do not know that they should not attack human beings.
Infertility could very well be one of the side effects of a pesticide. There are others as well. Some pesticides go after the central nervous system (think mice and rats) and those are dangerous to use and to leave around.
The others all involve occupations that either require authentic abilities or mental astuteness. Neither should affect a man's ability to reproduce.
procedure to find out if the penny is real copper with copper wire
Answer:
Four ways to test a copper penny are given below:-
Explanation:
Firstly, take a quick look only at the color of the penny. Zinc pennies may appear patchy, irregular whereas copper-gold coins may seem more probable to be orange or even chocolate. Secondly, drop your penny on the floor and hear the noise it's making. The copper penny would have a "started to ring" sound in this situation, whereas the zinc penny should "clunk." Third, you can weigh the centimeter. You'll need an accurate scale weighing in grams. The penny of copper will weigh 3.11 grams while the penny of zinc weighs 2.5 grams. In the end, look at the date. If your penny was taken out of circulation before 1982, 95 percent copper and 5 percent zinc will be made. Beginning in 1982, pennies had just 2.5 percent copper and 97.5 percent zinc in them. Pennies from any of the two formulations made in 1982 may be produced.
Which process is based on repulsion of oil and water?
Answer:
We can seprate oil and water by the process of seprating funnel
Nitrogen dioxide and water react to produce nitric acid, HNO3,
and nitrogen oxide.
3NO2(g) + H2O(l) — -→ 2HNO3(aq) + NO(g)
a. How many grams of H20 are required to react with 28.0 g
of NO2?
b. How many grams of NO are produced from 15.8 g of H2O?
c. How many grams of HNO3 are produced from 8.25 g of NOZ?
Answer:
Explanation:
a )
3NO₂(g) + H₂O(l) — -→ 2HNO₃(aq) + NO(g)
3 x 46 g 18 g 2 x 63 g 30 g
138 g of NO₂ requires 18 g of H₂O
28 g of NO₂ requires ( 18 / 138) x 28
= 3.65 g of H₂O.
b )
18 g of H₂O produces 30 g of NO gas
15.8 g of H₂O produces ( 30/18 ) x 15.8
= 26.33 g of NO gas .
c )
138 g of NO₂ produces 126 g of HNO₃
8.25 g of NO₂ produces (126 / 138 ) x 8.25
= 7.53 g of HNO₃
How do you know there was a chemical reaction?
Answer:
depends
Explanation:
because different chemicals can react they all have different ways of showing a reaction. an example is given: color, odor, texture weight solidity
Answer:
U will know there is a chemical reaction, when light, heat, color change, gas production, odor, or sound. The starting and ending materials of a physical change are the same
Explanation:
Consider 4.10 L of a gas at 365 mmHg and 20. ∘C . If the container is compressed to 2.20 L and the temperature is increased to 40. ∘C , what is the new pressure, P2, inside the container? Assume no change in the amount of gas inside the cylinder. Express your answer with the appropriate units.
Answer:
0.955 atm
Explanation:
We apply this formula derivated from the Ideal Gases Law
P₁ . V₁ / T₁ = P₂ . V₂ / T₂
We need to convert the temperature to absolute values
20°C + 273 K = 293K
40°C + 273 K = 313 K
Now we make a convertion for the pressure unit:
365 mmHg . 1 atm / 760 mmHg = 0.480 atm
We replace data:
(0.480 atm . 4.10L) / 293 K = (P₂ . 2.20 L) / 313K
[(0.480 atm . 4.10L) / 293 K] . 313 K = P₂ . 2.20 L
2.10 L.atm = P₂ . 2.20 L → P₂ = 2.10 L.atm/2.20L ⇒ 0.955 atm
(Blank) tells you that the exact momentum and position of a particle can't be known at the same time.
A. The Schrodinger equation
B. Quantum mechanics
C. The uncertainty principle
D. Particle-wave duality
Answer:
The uncertainty principle
Explanation:
Essentially if you measure the momentum of the particle at a given point, then when you go to measure the position it has moved, thus you don't know the position. Vise versa if you measure the position you only capture a still frame of the particle and no information about it's momentum, which will have changed.
Answer: the uncertainly principle
Explanation:
it basically states you can not know both at the same time
If the pH of a solution is 7.6, what is the pOH? A. 6.4 B. 8.4 C. 5.4 D. 7.4
Answer:
6.4
Explanation: pH
+
pOH
=
14
So if
pH
=
7.6
then
pOH
=
14
−
pH
=
6.4
Explanation:
Wrote this out spaced so it's more clear.
1. A 10.0 g sample of propane, C3H8, was combusted in a constant-volume bomb
calorimeter. The total heat capacity of the bomb calorimeter and water was 8.0
kJ/°C. The molar heat of combustion of propane is -2 222 KJ/mol. If the starting
temperature of the water was 20 °C, what will be the final temperature of the
bomb calorimeter?
Answer:
The final temperature of the bomb calorimeter is 82.98°C
Explanation:
The given information are;
The mass of the propane sample = 10.0 g
The heat capacity of the bomb calorimeter = 8.0 kJ/°C
The molar heat of combustion of propane is -2,222 kJ/mol.
The starting (initial) temperature of the water, T₁ = 20°C
The final temperature of the bomb calorimeter = T₂
The molar mas of propane = 44.1 g/mol
The number of moles, n, of propane present in 10.0 g of propane is found as follows;
[tex]Number \ of \ moles \ of \ propane, \ n = \dfrac{Mass \ of \ propane}{Molar mass \ of \ propane} = \dfrac{10}{44.1} = 0.227 \ moles[/tex]Which gives;
The heat, Δh, released from the combustion of 10.0 g of propane = 0.227 × -2222 kJ/mol
Δh = -503.85 kJ/mol
Heat gained by the calorimeter = Heat released from the combustion of 10.0 g of propane = 503.85 kJ/mol
Change in heat, Δh[tex]_c[/tex] in the calorimeter = Heat capacity × Temperature change
Δh[tex]_c[/tex] = m × C
503.85 kJ/mol = 8.0 kJ/°C × (T₂ - 20°C)
T₂ = -503.85 kJ/mol/(8.0 kJ/°C) + 20°C = 82.98°C
The final temperature of the bomb calorimeter = 82.98°C
the nature of zinc powder and Cobalt (II )oxide is heated the following reaction occurs ;
Zn(s)+CoO(s) => ZnO(s)+Co(s)
1)which metal is high in the reactivity series
2)the zink can be described as a reducing agent. using this Example explain what is the mean by the term ' reducing agent '
plz help!!!
1) The metal which reduces the other compound is the one higher in the reactivity. So in this case it is [tex] \mathrm{Zn}[/tex].
2) The substance which brings about reduction while itself getting oxidised (that is losing electrons) is called a reducing agent. Here, $\mathrm{Zn}$ is the reducing agent and reduces Cobalt Oxide to Cobalt while itself getting oxidised to Zinc oxide.
find the ph of o.o3 h2so4
Answer: 1.5
Explanation:
The pH of a solution is given by the formular; pH = - log [ H+ ]. Therefore, for H2SO4, it is;
pH = - log [ 3 x 10 ∧ -2]
= 2 - log 3
= 2 - 0.4771 = 1.5 approximately
How many grams of N2 can be produced when 6.50 g of O2
reacts?
Answer:
3.79 g of N2.
Explanation:
We'll begin by writing the balanced equation for the reaction.
This is given below:
4NH3 + 3O2 → 2N2 + 6H2O
Next, we shall determine the mass of O2 that reacted and the mass of N2 produced from the balanced equation.
This is illustrated below:
Molar mass of O2 = 16x2 = 32 g/mol
Mass of O2 from the balanced equation = 3 x 32 = 96 g
Molar mass of N2 = 2x14 = 28 g/mol
Mass of N2 from the balanced equation = 2 x 28 = 56 g
Summary:
From the balanced equation above,
96 g of O2 reacted to produce 56 g of N2.
Finally, we shall determine the mass of N2 produced by reacting 6.50 g of O2.
This can be obtained as follow:
From the balanced equation above,
96 g of O2 reacted to produce 56 g of N2.
Therefore, 6.50 g of O2 will react to produce = (6.50 x 56)/96 = 3.79 g of N2.
Therefore, 3.79 g of N2 were obtained from the reaction..
Hi :) how to do 4(b)?
Answer:
they produce water and a neutral ionic compound called a salt. The reaction is called a neutralization reaction.
Explanation:
What element has the electron configuration 1s^22s^22p^63s^23s^23p^4?
Answer: it’s S
Explanation:
The element with electronic configuration of 1s²2s²2p⁶3s²3p⁴ is sulphur (S)
The correct answer to the question is Option C. S
Electronic configuration is simply defined as the arrangement of electrons around the nucleus of an atom.
With the electronic configuration of an element, we can obtain the name of the element by simply obtaining the total number of electrons in the shells and comparing it with those in the periodic table.
From the question given above,
Electronic configuration => 1s²2s²2p⁶3s²3p⁴
Name of element =?Total electron = 2 + 2 + 6 + 2 + 4 = 16
Thus, the element has 16 electrons. This is assumed to be atomic number of the element.
Comparing the atomic number of the element (i.e 16) with those in the periodic table, the element is Sulphur with the symbol S.
Therefore, the element with electronic configuration of 1s²2s²2p⁶3s²3p⁴ is sulphur (S)
Option C. S gives the correct answer to the question.
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Which state of matter is characterized by ionized particles, no definite shape or volume, and good electrical conductivity? gas liquid plasma solid
Answer: Plasma
Explanation: Plasma is the state of matter where the substance is ionized and has no definite shape or volumen. The fact of being ionized makes the substance a good electrical conductor.
Hope it helps.
Matter generally exists in three physical states, namely solid, liquid and gaseous states. The three states mainly differ in the arrangement of particles and the force of attraction among the constituent particles. Here plasma is characterized by ionized particles. The correct option is C.
What is plasma?Plasma is a hot ionized gas which contains equal numbers of positively and negatively charged electrons. The characteristics of plasmas are significantly different from those of ordinary neutral gases so that it is considered as the fourth state of matter.
Since plasma are made up of electrically charged particles, they are strongly influenced by electric and magnetic fields while neutral gases are not. Like gases plasmas have no fixed shape or volume and are less dense than solids or liquids.
Plasma is a superheated matter, so hot that the electrons are ripped away from the atoms forming ionized gas. It comprises over 99% of the visible universe.
Thus the correct option is C.
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Heat is a measurement of temperature change. TRUE or FALSE
Answer:
i think its false because heat is defined as the sum of kinetic enegry present in the molecules of substances.
What factors influence the absorption of sunlight at Earth's surface
Answer:
Solar elevation.
Ozone.
Cloud cover.
Ground surface reflectivity.
Altitude.
Aerosols and pollutants.
Direct and diffuse UV.
I'm not sure if this was what you were looking for, but if it helps please mark me as brainliest.
Consider preparing ammonia gas by the following reaction:
N2(g) + 3H2(g)
===>
2NH3(g)
If you have 28.02 g of N2 and excess H2, how many grams of NH3(g) can be produced.
6.06 g
14.01 g
34.08 g
68.16 g
28.02 g
Answer:
34.08 g
Explanation:
Take the atomic mass of N=14.0, H=1.0/
no. of moles=mmass/molar mass
no. of moles of N2 used = 28.02 / (14x2)
=1.0007mol
From the equation, the mole ratio of N2 : NH3 = 1: 2,
so one mole of N2 produces 2 moles of NH3.
Using this ratio, we can deduce that the no. of moles of NH3 = 1.0007x2
= 2.001428mol
mass = no. of moles x molar mass
Hence,
mass of NH3 produced = 2.001428 x (14+1x3)
= 34.03
≈C
What is the value of the equilibrium constant Kcif the concentration of NO and NOBr are 0.10 M and
the concentration of Br2 is 3.0 M?
2NOBr(8) = 2NO(g) + Br2(g)
Answer:
3
Explanation:
Data obtained from the question include:
Concentration of NO, [NO] = 0.1M
Concentration of NOBr, [NOBr] = 0.1M
Concentration of Br, [Br2] = 3M
Equilibrium constant, Kc =..?
The equilibrium constant, Kc is simply the ratio of the concentration of the products raised to their coefficient to the concentration of the reactants raised to their coefficient.
Thus, the equilibrium constant, Kc for reaction can be obtained as follow:
2NOBr <==> 2NO + Br2
Kc = [NO]² [Br2] /[NOBr]²
[NO] = 0.1M
[NOBr] = 0.1M
[Br2] = 3M
Kc =..?
Kc = [0.1]² [3] /0.1]²
Kc = 3
Therefore, the equilibrium constant Kc, for the reaction is 3.
Answer:
3
Explanation:
which three events occur when earths convection currents move toward each other
Answer:
Option A, Tectonic plates above the currents move toward each other.
Option C, One plate will submerge beneath another plate.
Option D, A convergent boundary is formed at the site of the collision.
Explanation:
The convection currents are the ones responsible for the movement of the tectonic plates, thus shaping the Earth's appearance with their movement, as well with the structures created by the movement. If the convection currents move toward each other, than the tectonic plates are moving toward each other. That will cause collision between the continents, and convergent boundaries will be formed. If the collision is between two or more continental plates, than they will merge, and from the pressure mountain ranges will start to form, but if there an oceanic plate involved as well, than the oceanic plate will be subducting beneath the continental plate or plates.
Answer:
- Tectonic plates above the currents move toward each other;
- One plate will submerge beneath another plate;
- A convergent boundary is formed at the site of the collision;
The convection currents are the ones responsible for the movement of the tectonic plates, thus shaping the Earth's appearance with their movement, as well with the structures created by the movement. If the convection currents move toward each other, than the tectonic plates are moving toward each other. That will cause collision between the continents, and convergent boundaries will be formed. If the collision is between two or more continental plates, than they will merge, and from the pressure mountain ranges will start to form, but if there an oceanic plate involved as well, than the oceanic plate will be subducting beneath the continental plate or plates.
As Danny was pouring cereal for his breakfast, he noticed that the cereal box says that the cereal contains 5 milligrams of iron per serving. Danny decided to perform an experiment to test this claim. He found that the cereal contains 4.6 milligrams of iron per serving. Based on Danny's measurement, the value reported on the label is ( CORRECT OR INCCORECT) because A: (IT IS DIFFERENT FROM THE VALUE DANNY MEASURED) B: (IT IS REORTED TO THE NEAREST MILLIGRAM) C: (IT USES THE SAME UNITS THAT DANNY USED).
Answer:
Correct, because B it is reported to the nearest miligram
Explanation:
4.6 rounded up is 5
A rigid container is filled with chlorine gas. The gas has a pressure of 2.75 bar. The tank is then cooled down to -20.0oC at which point the pressure of the gas is now measured to be 1.48 bar. What was the original temperature (in oC) of the gas?
Answer:
Original temperature (T1) = - 37.16°C
Explanation:
Given:
Gas pressure (P1) = 2.75 bar
Temperature (T2) = - 20°C
Gas pressure (P2) = 1.48 bar
Find:
Original temperature (T1)
Computation:
Using Gay-Lussac's Law
⇒ P1 / T1 = P2 / T2
⇒ 2.75 / T1 = 1.48 / (-20)
⇒ T1 = (2.75)(-20) / 1.48
⇒ T1 = -55 / 1.48
⇒ T1 = - 37.16°C
Original temperature (T1) = - 37.16°C
Q10. Calcium fluoride can be made from the reaction of calcium metal with fluorine gas. The image shows this reaction. Explain how the product is formed in terms of electron movement and what the final electron configurations are
Answer:
The answer to your question is given below
Explanation:
In this reaction, the calcium metal, Ca loses two electrons to form calcium ion, Ca^2+ and two fluorine atoms, F receives the two electrons to form two fluoride ion, F^-.
This is illustrated by the following equation:
Ca —> Ca^2+ + 2e
2F + 2e –> 2F^-
Ca + 2F + 2e —> Ca^2+ + 2F^- + 2e
Cancel out 2e
Ca + 2F —> Ca^2+ 2F^-
Thus, the electronic configuration can be written as follow:
Before combination:
Calcium, Ca (20) => 2, 8, 8, 2
Two fluorine atom, F (9) => 2, 7 and 2, 7
After combination:
Calcium ion, Ca^2+ => 2, 8, 8
Two fluoride ion, F^- => 2,8 and 2,8