Answer:
Given,
P1=760 torr
T1=21°C
T2=250°C
P2=?
Solution,
According to Gay-Lussac's Law or Third Gas Law,
P1T2=P2T1
760×250=21×P2
P2=9047 torr
9047 is the pressure of the gas at 250 degree Celsius.
Answer:
9,047.62 torr
Explanation:
The given parameters are pressure (P1) = 760 torr, Temperature at which the gas exerts pressure, P1, called the initial temperature (T1) = 21-celsius degrees, a second temperature(T2) = 250 Celsius degrees, and the pressure(P2) which such gas would exert at T2 is unknown [P2=?]. Notice that the temperature difference.
Gay Lussac's Law states that the pressure of a given amount of gas held at constant volume is directly proportional to the kelvin temperature.
If you heat a gas, the molecule gains kinetic energy and they move about in their container. As the temperature increase, the energy each particle gains would increase as well. Thus, allowing them to move faster and in all directions. Because they are confined to the boundary of the container, the gas particles bounce off the wall of the container. The energy allows continuous movement of the particle. Hence, the pressure each particle would exert on the wall of the container is equal to its momentum. Remember that the velocity, V, a particle is traveling with is promotional to the energy, E, that it obtains from the increase in temperature.
Using the Gay Lussac's Law equation: P1T2=P2T1 [Notice here that P=T].
Making P2 the mathematical subject, P2= P1T2/T1. ----Formula for the condition of this problem.
Substituting the known values;
P2= (760 torr x 250°C)/ 21 °C
P2= (190,000 °C torr)/21 °C
Cancel like terms in the numerator and denominator.
P2= (190,000 torr)/21
P2= 9,047.62 torr
[Notice that the pressure increase with the increase in temperature. The pressure increase from 760 torr to 9,047.62 torr with an increase in temperature from 21 Celsius degrees to 250 Celsius degrees.]
How much energy is required to raise the temperature of 74 g of water from 19 °C to 47 °C.
Answer:
The energy required is 8660.96 J.
Explanation:
Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
Sensible heat is the amount of heat that a body absorbs or releases without any changes in its physical state (phase change). This heat is given by the expression:
Q = c * m * ΔT
where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.
In this case, you know:
C= 4.18 [tex]\frac{J}{g*C}[/tex]m= 74 gΔT= Tfinal - Tinitial= 47 C - 19 C= 28 CReplacing:
Q= 4.18 [tex]\frac{J}{g*C}[/tex] *74 g* 28 C
Solving:
Q= 8660.96 J
The energy required is 8660.96 J.
Hydrogen gas reacts with chlorine gas to form hydrogen chloride as shown in the following reaction: H2 (9) + Cl2 (g) + 2HCl (9) If a 454.4 g sample of chlorine gas (MM = 71.0 g/mol) was reacted with excess hydrogen at 565 K and 2.30 atm, how many grams of hydrogen chloride gas (MM = 36.5 g/mol) are produced? g Your answer should be rounded to three significant figures. Do not include units in your answer
Answer:
467
Explanation:
ncl2 = 454.4x1/(71.0 g/mol) = 6.40 mols cl2
6.40 mols cl2 x 2molsHCL/1moleCL2 x 36.5g/1moleHCL = 467 g HCL
One mole of chlorine gas gives two moles of hydrogen chloride. Thus, 454.4 g of chlorine gas will give 467.2 g of hydrogen chloride.
What is hydrogen chloride?Hydrogen chloride is a covalent compound formed by the electron sharing of chlorine and hydrogen. It normally exists in gaseous state and can be liquified to the acidic form.
As per the balanced reaction one mole of chlorine gas gives two moles of hydrogen chloride gas. The molecular mass of chlorine gas is 71 g/mol. The molar mass of HCl is 36.5 g/mol.
Hence, 71 g of chlorine gas gives 73 g of HCl. Then, the mass of HCl produced from 454.4 g of chlorine gas is calculated as follows:
mass of HCl = (454.4 × 73) / 71
= 467.2 g.
Therefore, the mass of HCl produced from 454.4 g of chlorine gas is 467.2 g.
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What should be the labels on the X-axis and Y-axis?
Answer:
The label on the X-axis is Heat Supplied or Absorbed
The label on the Y-axis is Temperature
Explanation:
The given graph is the heating curve of a substance as it is absorbs heat (increase in the x-axis) and have an increase in temperature (increase in the y-axis) between its different phases, from A to E
Therefore;
The label on the X-axis should be Heat Supplied or Absorbed
The label on the Y-axis should be Temperature
An appropriate state of phase 'A' is the solid phase of the substance where the temperature of the substance increases as heat is supplied without the substance changing into a liquid
Stage 'B' is the melting stage, when the substance transforms from solid to liquid as heat is applied, without an increase in temperature, which is seen by the horizontal line of stage 'B'
At stage 'C', the substance which is entirely liquid continues to absorb heat (moving to the right), while the temperature rises
At stage 'D', the substance in the liquid state continues to absorb heat (moving to the right), but rather than increase in its temperature, the substance transforms to the gaseous phase, which is phase 'E'
At phase 'E', the substance continue to absorb heat without changing state and therefore its temperature increases
The phases 'B', and 'D', where there is no increase in temperature as heat is added (progression to the right) are the regions where we have the latent heat of fusion and evaporation respectively.
One is a negative environmental consequence of surface mining?
Answer:
Surface mining (also known as "strip mining") has the potential to significantly erode soil fertility, pollute waters, deplete underground water sources, scar or altar the landscape, damage roads, houses, and other buildings, and kill wildlife.
calculate the mass of 0.5 moles of caco3 in grams with procedure
Answer:
50g
Explanation:
moalr mass of CaCO3= 40g/mol+ 12g/mol+(16g/mol*3)
=52g/mol+48g/mol
=100g/mol
1 mol= 100g
0.5mol=x
by cross multiplication,
0.5*100gmol=x mol
x=50g
aluminum oxide solube or insolube
Answer:
Reaction with water: Aluminum oxide is insoluble in water and does not react like sodium oxide and magnesium oxide.
A stationary front forms when
15.00 g aluminum sulfide and 10.00 g water react until the limiting reagent is used up. Here is the balanced equation for the reaction: ALS3 + 6 H2O ---> 2Al(OH)3 + 3 H2S (A) Which is the limiting reagent? (B) What is the maximum mass of H2S which can be formed from these reagents? (C) How many grams of the excess reactant will remain?
Answer:
A. it's H20
B. mH2O=17g
C. m Al(OH)3= 39g
m AlS3 = 6.15
PS.
13. Calculate the number of representative particles of each substance.
a. 11.5 mol Ag
c. 0.150 mol NaCl
b. 18.0 mol H2O
d. 1.35 x 10-2 mol CH4
What is the chemical name of Ca3H2?
Answer:
it should be calcium hydrate
Traits are passed from parents to offspring. These traits are determined by
Answer: Gene Characteristic. (They are usually made up of more than one gene).
Trihydrogen monophosphide is a covalent molecule that can also act as an acid. What is the correct acid name for trihydrogen monophosphide ?
Answer:
H₃P phosphidic acid
Explanation:
The Trihydrogen monophosphide, as stated in the exercise, can act as an acid. This is pretty similar to the case of hydrogen chloride, which is a gas but it can also be an acid, in this case, chloridic acid.
In the case of trihydrogen phosphide, we can write it molecular formula which is:
H₃P
Now, this is a binary compound because its composed of only two elements, in this case, hydrogen and phosphide. To name binary acid, we need to name the non metal with the sufije idic, and then, the word acid.
Following this simple rule, the trihydrogen phosphide would be, as acid:
H₃P: phosphidic acid
Hope this helps
How much heat is absorbed if a 30.0 gram sample of carbon is heated from 10.5 degrees Celsius to 22.2 degrees celsius
Answer:
A lot of heat
Explanation:
PLZ HELP. Write and balance the following chemical equations:
nitrogen and oxygen combine to form dinitrogen pentoxide
Answer:
No they form nitrogen oxide which can be poisonous to some species but depending on the amount of nitrogen it can be harmful to everything living. Such as if you put it with a plant that had low nitrogen levels then there would be no carbon dioxide to filter.
Explanation:
One of the main components of an airbag is the gas that fills it. As part of the design process, you need to determine the exact amount of nitrogen that should be produced. Calculate the number of moles of nitrogen required to fill the airbag. Show your work. Assume that the nitrogen produced by the chemical reaction is at a temperature of 495°C and that nitrogen gas behaves like an ideal gas. Use this fact sheet to review the ideal gas law.
The number of moles of the gas is 0.016 moles
What is the airbag reaction?We know that in the airbag, nitrogen gas is obtained by the decomposition of sodium azide as follows; 2NaN3 -----> 2Na + 3N2
Since it is under ideal conditions;
P = 1 atm
V = 1 L
T = 495°C or 768 K
n = ?
R = 0.082 atm LK-1mol-1
From;
PV= nRT
n = PV/RT
n = 1 atm * 1 L/ 0.082 atm LK-1mol-1 * 768 K
n = 0.016 moles
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What property of ocean water affects climate the most?
O A. Its salt content
B. Its density
O C. Its heat capacity
O D. Its freezing point
Answer:
c
Explanation:
Wat two common uses for Sulfur??
Answer:
It is used to make black gunpowder and also to make sulfuric acid which is used in batteries, fertilizers, etc...
Explanation:
It is used to make black gunpowder and also to make sulfuric acid which is used in batteries, fertilizers, etc..
What is the Environmental Lapse Rate?
Answer:
The rate at which the air temperature changes with height in the atmosphere surrounding a cloud or a rising parcel of air. The overall average rate is a decrease of about 6.5°C/km, but the rate varies greatly in different regions of the world, in different airstreams, and at different seasons of the year.
It was suggested that, because of the jump in numbers, from chlorine to potassium, there was an element missing between them. Which element was discovered between these elements?
Answer:
Argon
Explanation:
Argon because chlorine is atomic number 17 and potassium is atomic number 19
Argon is between them thank you
Crude oil is a liquid kind of what?
Answer:
Crude oil is a mixture of comparatively volatile liquid hydrocarbons (compounds composed mainly of hydrogen and carbon), though it also contains some nitrogen, sulfur, and oxygen. Those elements form a large variety of complex molecular structures, some of which cannot be readily identified.
Explain why using standard chemical names for compounds would be important when working in a laboratory.
Answer:
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Explanation:
PLEASE HELP
Balance this equation.
___PH3 ——-> ___ P2 + H2
Answer:
2PH3 = P2 +3H2
Explanation:
Explain why there would be a need for lithium batteries?
Answer:
The much higher power density offered by lithium ion batteries is a distinct advantage. Electric vehicles also need a battery technology that has a high energy density. ... Lithium ion cells is that their rate of self-discharge is much lower than that of other rechargeable cells such as Ni-Cad and NiMH forms.
Put this into your own words or teachers will make you redo it
Help Plz
How does temperature relate to energy?
Answer:
temperature a measurement of the average amount of energy PER UNIT OF STUFF
Heat Energy is TOTAL ENERGY IN THE STUFF
So, that's why the difference. If you have two things at the same temperature, then any one mole (which is the same as how many molecules or atoms it takes to make up the molecular weight of something in grams.. so one mole of Hydrogen weighs 1 gram, 1 mole of helium weighs 2 grams, 1 mole of Gold weight 196 grams) of the stuff will have the same amount of energy as one mole of the other stuff. If you measure by total mass though, then you realize that there are more water molecules than gold ones in the same volume of stuff, and heat is about volume and molecular density, not mass.
This is why some Stirling engine folks who have made solar plants use Helium as the working gas.. it contains a huge amount of heat for its volume (also because it is very compressible)
So.. Delta Q goes with moles, not mass.
Describe your observations of how the waves are behaving in the photograph.
Answer:
The waves are behaving this way due to the simultaneous water drops landing in the water.
Explanation:
because ima smart baddie (≧▽≦)
How many grams are in 1.52 moles of PC13? (molar mass: 137.33 g/mol)
Air is made of nitrogen, carbon dioxide, and small amounts of other gases. What is the pressure of O₂, total is 1 atm if PN₂ = 593.4 mm Hg, PCO₂ = 3.0 mm Hg, and Pothers = 7.1 mm Hg? *
0.3 atm
0.2 atm
0.4 atm
0.8 atm
Answer:
The pressure of O₂ is 0.8 atm.
Explanation:
The pressure exerted by a particular gas in a mixture is known as its partial pressure. So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone:
PT = PA + PB
This relationship is due to the assumption that there are no attractive forces between the gases.
In this case:
PT=Pnitrogen + Pcarbon dioxide + Pother gases
Being:
Pnitrogen: 593.4 mmHg Pcarbon dioxide: 3 mmHgPother gases: 7.1 mmHgand replacing:
PT= 593.4 mmHg + 3 mmHg + 7.1 mmHg
you get:
PT= 603.5 mmHg
Being 760 mmHg= 1 atm, you get:
PT= 603.5 mmHg= 0.8 atm
The pressure of O₂ is 0.8 atm.
What volume of hydrogen (in L) is produced
from the complete reaction of 3.143 moles of
hydrochloric acid at STP?
Answer:
35.20
Explanation:
I got it right when I answered it
What is the molarity of a solution prepared by dissolving 35.0 grams of NaOH in enough water to make a solution with a total volume of 2.40 liters?
C219
COMPLETE
-241.82
What is the enthalpy of reaction for the
decomposition of NO2(g)?
H2O(g)
NO2(g)
33.84
2NO2(g) → N2(g) + 2O2(g)
11 kJ
This reaction is
Answer:
a
Explanation: