1. 1.636 moles
2. 271.06 kPa pressure
3. Tires will be burst
4. 235.91 kPa
Explanation:
Step 1:
PV = nRT, is the equation to be used where
P represents pressure
V represents volume
n represents moles of gas
R is constant
T represents temperature in Kelvin
n=RT/PV
It is given that the pressure is 245 kPa at initial temperature 19 C and tire volume is 16.2 L. Temperature must be converted to Kelvin, 19 C equals 292K.
n=PV/RT ->245*16.2/(8.31*292) = 1.636
Number of moles of Nitrogen in the tire = 1.636
Step 2:
We need to find the maximum tire pressure at 50 C (323K)
P = nRT/V
Substituting the values P = (1.636 * 8.31 * 323)/16.2 = 271.06 kPa
The tire pressure at 50 C will be 271.06 kPa
Step 3
We need to figure out if the tires would burst in Chelan when the temperature is 55 C. It is given that the maximum pressure the tires can withstand is 265 kPA, so any pressure above this will cause the tire to burst. In Step-2 we calculated that the pressure is 271.06 kPA at 50 C which is more than the maximum pressure the tire can withstand. The pressure would increase further with temperature and at 55 C the pressure will be more than 271.06 kPa. So the tires are likely to burst in Chelan.
Step 4:
We need to find the pressure of Nitrogen at 19 C before the start of the trip so that tires will not burst. The pressure at 55 C is 265 kPa. Let us find the number of moles at this temperature and pressure.
n= PV/RT -> n=265*16.2/(8.31*328) = 1.575
Now let us find the pressure at 19 C.
P = nRT/V -> 1.575*8.31*292/16.2 = 235.91 kPa
What statement is MOST accurate about a chlorine ion? A) The chlorine ion is a result of chlorine's relatively low electronegativity. B) The ionic radius of a chlorine ion is larger than the radius of a chlorine atom. C) The atomic radius of a chlorine atom is larger than the radius of a chlorine ion. D) Chlorine ions are created when a chlorine atom loses electrons forming compounds.
Answer:
The answer to your question is letter B.
Explanation:
Chlorine is a nonmetal whose atomic number is 17. As a nonmetal, it is stable when it gains electrons.
Chlorine is one of the most electronegative elements just below Fluorine and Oxygen.
Chlorine atomic radius' is 99 and its ionic radius is 181.
Considering the previous information we can conclude that the correct answer is letter B.
The most accurate statement about chlorine ions is that the ionic radius of a chlorine ion is larger than the radius of a chlorine atom. Thus option B is correct.
Chlorine is an element of the halogen group. The atomic number of chlorine has been 17, thus it has 7 valence electrons. In order to attain the stable noble gas configuration, the chlorine atom gains an electron and has been converted to a chlorine ion.
Thus option C is incorrect and option B is correct.
Match the appropriate name for particle shown below. 42He
11H
00γ
0-1β
01e
10n
A.
Gamma photon
B.
Positron
C.
Beta particle
D.
Neutron
E.
Alpha particle
F.
Proton
Coal can be used to generate hydrogen gas (a potential fuel) by the following endothermic reaction:C(s)+H2O(g) ------------->CO(g) + H2(g)If this reaction mixture is at equilibrium, predict whether each of the following will result in the formation of additional hydrogen gas, the formation of less hydrogen gas, or have no effect on the quantity of hydrogen gas:______.A. adding more C to the reaction mixtureB. adding more H2O to the reaction mixtureC. raising the temperature of the reaction mixtureD. increasing the volume of the reaction mixtureE. adding a catalyst to the reaction mixtureF. adding an inert gas to the reaction mixture
Answer:
A. No effect
B. Results in the formation of additional hydrogen gas
C. Results in the formation of additional hydrogen gas
D. Results in the formation of additional hydrogen gas
E. No effect
F. No effect
Explanation:
The equilibrium in this question is
C(s) + H₂O (g) ⇄ CO(g) + H₂ (g)
and
Kp = pCO x pH₂/ pH₂O
where pCO, pH₂O and pH₂O are the partial pressures of CO, H₂ and H₂O.
We call the equilibrium constant Kp since only gases intervene in the expression for the constant.
A. adding more C to the reaction mixure
Adding more carbon which is a solid does not alter the pressure equilibrium constant, therefore, it has no effect on the equilibrium and consequently no effect on the quantity of hydrogen gas.
B. adding more H₂O to the reaction mixture
We can answer this part by using Le Chatelier's principle which states that a system at equilibrium will respond to a stress in such a way as to minimize the stress, hence restoring equilbrium.
One of the three possible stresses is an increase of reactant as in this case. The system will react by decreasing some of the added water. Thus the equilbrium shifts to the product side which will result in the formation of more hydrogen gas.
The difference of this part with respect to part A is that indeed the water gas is included in the equilibrium constant expression.
C. raising the temperature
This is another stress we can subject an equilibrium.
We are told the reaction is endothermic which means in going from left to right it consumes heat. Thus the equilibrium will shift to the product side by consuming some of the added heat favoring the production of more hydrogen gas.
D. increasing the volume of the reaction mixture
This the last of the stresses .
Increasing the volume of the reaction effectively decreases the pressure ( volume is inversely proportional to pressure ) so the equilibrium will shift to the side that has more pressure which is the product side: we have two moles of gases products vs. 1 mol gas in the reactant side.
Therefore, the equilibrium will shift to the right increasing the quantity of H₂.
E. adding a catalyst to the reaction mixture
The addition of a catalyst does not have an effect on the equilibrium constant. The catalyst will speed both the forward and reverse reaction decreasin the time to attain equilibrium.
So there is no effect on the quantity of H₂.
F. Adding an inert gas to reaction mixture
Assuming the volume of the reaction mixture remains constant, and we are not told such change in volume occurred, the addition of an inert gas does not have an effect in our equilibrium. The inert gasdoes not participate in the calculation for Kp.
The situation will be different if the volume of the reaction is allowed to increase, but again this is not stated in the question.
Two proteins interact to form a multimeric complex. When one of the proteins is mutated, there is a substantial loss of functional activity in the multimeric protein. This type of mutation is classified as:_______.1. hypomorphic2. amorphic3. hypermorphic4. dominant negative5. neomorphic
Answer:
4. dominant negativeExplanation:
Mutation is the process in which sudden changes take place within the sequence of amino acids that causes different type of problems. On the basis of nature and conditions mutation can be classified as dominant negative, neomorphic and some others types. Dominant mutation is also called as antimorphic mutation and changes the functions of the molecules that are proteins.
When a 13.0g sample of NaOH(s) dissolves in 400.0 mL water in a coffee cup calorimeter, the temperature of the water changes from 22.6C to 30.7C. Assuming that the specific heat capiacity of the solution is the same as for water, calculate:_______. (a) the heat transfer from system to surroundings
(b) change in H for the reaction
NaOH(s) -----> Na+(aq) + OH-(aq)
Answer:440.154j
Explanation:
H=mcΔT
H= 13*4.18*8.1
H=440.154j
Using glucose as an example of food, calculate the annual human production of CO2 in grams, assuming that each person consumes 4.35 × 102 g of glucose per day. The world's population is 6.50 billion and there are 365 days in a year.
Answer:
Therefore the annul human production of =1.514×10¹⁵ gram
Explanation:
A glucose molecule react with oxygen and produce carbon-dioxide and water.
The reaction is
The balance form of the above reaction is
The molar mass of is
={(6×12)+(12×1)+(6×16)}g/mole
=180 g/mole
The molar mass of is
=[{12+(2×16)}] g/mole
=44 g/mole
Then the molar mass of 6 is
=(6×44) g/mole
=264 g/mole
180 gram glucose is produce 264 gram of .
1 gram glucose is produce gram of .
Given that each person consumes 4.32×10² g glucose per day.
Therefore each person produce gram per day
Total population in the world is 6.50 billion= 6.50 ×10⁹
∴ 6.50 ×10⁹ produce gram per day
Therefore the annul human production of
=
=15136.55×10¹¹ gram
=1.514×10¹⁵ gram
What is the molarity of a solution that contains 148g NaOH in 4.00 L solution? a 0.925 M b 0.0253 M c 0.459 M d 1.363 M
Answer:
M = 0,925
Explanation:
n= mass/Molecular Weight
n = 148g / 39,99 (g/mol)
n= 3,7mol
M= n/Volumen(L)
M= 3,7mol/4L
M=0,925
Jaynes science teacher mixed a clear liquid with a blue liquid in a beaker. After a few minutes there was a white solid at the bottom of the beaker. What mostly likely true about white solid
Options:
A.
It is a new substance with different properties.
B.
It was secretly added to the beaker by the teacher.
C.
It is an organic compound.
D.
It will dissolve in water to form a blue solution
Answer:A. It is a new substance with different properties.
Explanation: A chemical reaction is a reaction between two substance or elements which resulted in the formation of another substance or compound with a new and different properties when compared to the initial materials, chemical reaction or change can not be reversed.
THE MIXTURE OF THE CLEAR LIQUID WITH A BLUE LIQUID WHICH LED TO THE FORMATION OF WHITE SOLID BENEATH AT THE BASE OF THE BEAKER IS A CHEMICAL REACTION.
Answer:
It is a new substance with different properties.
Suppose you start with 0.303 g of copper wire and faithfully follow the procedure. At the end you find that the copper dust weighs 0.309 g. Based on your understanding of the experimental procedure, offer at least two rational explanations for this apparent violation of the law of conservation of mass.
In general, violation of conservation of mass could be ascribed to following factors-
(1) Copper might be oxidized to copper oxide through aerial oxidation which has higher molar mass than metallic copper.
(2) Presence of moisture could lead to increase in mass. So proper drying is needed.
(3) As difference in mass arises at third decimal point therefore accurate weighing of sample is required during experiment.
Law of conservation of mass:The mass is constant irrespective of its changes in form; the principle that matter cannot be created or destroyed.
Thus, given above the points for violation of the law of conservation of mass.
Find more information about Law of conservation of mass here:
brainly.com/question/15289631
Answer:
Hi, the given question has some missing parts as the experimental procedure has not been mentioned.
Explanation:
In general, violation of conservation of mass could be ascribed to following factors-
(1) Copper might be oxidized to copper oxide through aerial oxidation which has higher molar mass than metallic copper.
(2) Presence of moisture could lead to increase in mass. So proper drying is needed.
(3) As difference in mass arises at third decimal point therefore accurate weighing of sample is required during experiment.
Calculate the moles of FeFe in 1.17×10221.17×1022atoms of FeFe. Express the number of moles numericall
Answer:
The number of moles of Fe in 1.17*10^22 atoms Fe is 0.0194 moles
Explanation:
Step 1: Data given
Number of atoms of Fe = 1.17 * 10^22 atoms
Number of Avogadro = 6.022 *10^23
Step 2: Calculate number of moles Fe
Moles Fe = atoms Fe / number of Avogadro
Moles Fe = 1.17*10^22 atoms / 6.022*10^23 / moles
Moles Fe = 0.0194 moles
The number of moles of Fe in 1.17*10^22 atoms Fe is 0.0194 moles
Calculate the number of SO2SO2 molecules in 5.83 molmol of SO2SO2. Express the number of molecules numerically.
Answer:
The number of molecules in 5.83 moles of SO2 is 3.51*10^24 molecules
Explanation:
Step 1: Data given
Number of moles SO2 = 5.83 moles
Number of Avogadro = 6.022 * 10^23
Step 2: Calculate molecules SO2
Number of molecules = number of moles * number of Avogadro
Number of molecules = 5.83 * 6.022 *10^23 / moles
Number of molecules = 3.51*10^24 molecules
The number of molecules in 5.83 moles of SO2 is 3.51*10^24 molecules
Calculate the number of CC atoms in 0.183 molmol of CC. Express the number of atoms of carbon numerically.
Answer:
In 0.183 moles C we have 1.1*10^23 atoms C
Explanation:
Step 1: Data given
Number of moles C = 0. 183 moles
Number of Avogadro = 6.022 *10^23 / moles
Step 2: Calculate the number of atoms
The number of atoms = moles * number of Avogadro
The number of atoms = 0.183 moles * 6.022*10^23 /moles
The numberof atoms = 1.1*10^23 atoms
In 0.183 moles C we have 1.1*10^23 atoms C
Which of the following statements is true of water in a solid state? Choose all that apply. A. There are covalent bonds between each water molecule.
B. Solid water conforms to the shape of its container.
C. Water molecules in ice do not interact with each other very often.
D. It is rigid and forms a three-dimensional crystalline shape.
E. Water molecules in ice remain in a relatively fixed position and are not as mobile as they are in the liquid state, where there are fewer hydrogen bonds.
A reaction occurs in a mixture of 2 liters of hydrogen gas and 3 liters of chlorine gas. How many liters of hydrochloric gas are produced? Which is the excess and by how much?
Answer:
We will produce 4.0 L of hydrochloric gas
Chlorine gas is the excess. There will remain 1.0 L
Explanation:
Step 1: Data given
Volume o H2 = 2.0 L
Volume of Cl2 = 3.0 L
Step 2: The balanced equation
H2 + Cl2 → 2HCl
Step 3: Calculate moles
22.4 = 1 mol
2.0L H2 = 0.0893 moles H2
3.0 L Cl2 = 0.134 moles Cl2
Step 4: Calculate limiting reactant
For 1 mol H2 we need 2 moles Cl2 to produce 2 moles HCl
H2 has the smallest amount of moles so it's the limiting reactant.
It will completely be consumed (0.0893 moles)
Cl2 is in excess. There reacts 0.0893 moles
There will remain 0.134 - 0.0893 = 0.0447 moles
This is 0.0447 * 22.4 = 1.0 L
Step 5: Calculate moles HCl
For 1 mol H2 we need 2 moles Cl2 to produce 2 moles HCl
For 0.0893 moles H2 we'll have 2*0.0893 = 0.1786 moles HCl
Step 6: Calculate volume HCl
1 mol = 22.4 L
0.1786 moles = 4 L
We will produce 4.0 L of hydrochloric gas
Chlorine gas is the excess. There will remain 1.0 L
Isotopes of an element have the same number of ________ and different numbers of ________. A. electrons... protons
B. protons... electrons
C. protons... neutrons
D. neutrons... protons
Answer: C
Explanation:
Isotopes has the same atomic number which is the same as number of proton but different mass number.
Mass number = proton + neutron A change in the number of neutrons affect the mass number
A carbon dioxide laser is an infrared laser. A CO2 laser with a cavity length of 53.00 cm oscillates in the m = 100,000 mode. What is the wavelength of the laser beam?
Answer:
5.3 × 10^-4 m or 0.0000053m
Explanation:
Wavelength is given by 2L/m
Where m is the waves bewtween the cavity mirrors which is 100000
L is the cavity length which is 53.00 cm
53/100 (convert to meter) =0.53m
Therefore the wavelength is (2 × 0.53m)/100,000
=0.0000053
= 5.3 × 10^-6 m
When calcium oxide, CaO(s) dissolves in water, the water becomes hot. Write a chemical equation for this process and indicate whether it is exothermic or endothermic.
Answer:
The interaction reaction of calcium oxide and water leads to the formation of calcium hydroxide, this reaction is exothermic, which indicates that energy is released.
CaO(s) + H2O ⇒ Ca(OH)2
Explanation:
Calcium oxide reacts violently with water, causing it to reach 90 C. It then forms calcium hydroxide, also called slaked lime. It is heated because it releases energy in the form of heat, because the new substance formed (slaked lime) has less internal energy than the original and this is released in the form of heat. As a general rule, acid and base solutions are exothermic.
Jack is playing with a Newton's cradle. As he lifts one ball to position A and drops it, it impacts the other balls at position B and becomes stationary while the ball on the opposite side leaps into the air swinging to position C. What is happening to cause this?
Answer:
Newton's Cradle is a neat way to demonstrate the principle of the CONSERVATION OF MOMENTUM.
What happens here is when the ball on one end of the cradle is swung and it hits the other balls that are motionless, or stationary, the momentum of the swinging ball is transferred to the next ball upon impact.
Momentum is not lost in this action, what happens when it hits the next ball, the momentum is transferred to the next one, and then the next, and the the next, till it reaches the last ball on the other end. Since nothing is next to the last ball, it pushes the ball upwards, which will swing down and repeat the process going the other way.
This also demonstrates the CONSERVATION OF ENERGY. As you will see, the energy continues to move through the other balls, passing it from one ball to the other, which keeps this constantly moving.
Answer:
D) Energy of the first ball is transferred on impact to the opposite ball.
Suppose 5.00 moles of Lithium Nitrate react with 5.00 moles of Magnesium Fluoride react according to **BALANCE 1st!!**: __Li(NO3) __ MgF2 -> __LiF __Mg(NO3)2
Answer : The balanced chemical reaction will be,
Explanation :
Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.
The unbalanced chemical reaction is,
This reaction is an unbalanced chemical reaction because in this reaction number atoms are not balanced.
In order to balance the chemical equation, the coefficient '2' put before the and then we get the balanced chemical equation.
The balanced chemical reaction will be,
H2S(aq)⇌HS−(aq)+H+(aq), K1 = 9.06×10−8, and HS−(aq)⇌S2−(aq)+H+(aq), K2 = 1.18×10−19, what is the equilibrium constant Kfinal for the following reaction? S2−(aq)+2H+(aq)⇌H2S(aq)
Answer:
Therefore the equilibrium constant is 9.35× 10²⁵
Explanation:
Equilibrium constant:
Equilibrium constant is used to find out the ratio of the concentration of the product to that of reactant.
xA+yB→zC
The equilibrium constant K,
Here [A] is equilibrium concentration of A
[B] is equilibrium concentration of B
[C] is equilibrium concentration of C.
1.
2.
3.
Therefore,
⇒K₃=9.35× 10²⁵
Therefore the equilibrium constant is 9.35× 10²⁵