Explanation:
Second answer is the correct one.
A sample of hydrogen gas will behave most like an ideal gas under the conditions of
A) low pressure and low temperature
B) low pressure and high temperature
C) high pressure and low temperature
D) high pressure and high temperature
Answer:
Low pressure and high temperature
Explanation:
Elements in a groups have the same number of ___ and the same ____.
Answer:
Protons, electrons
Explanation:
Elements in a groups have the same number of protons and the same electrons.
Calculate the temperature of a gas when it is expanded to 5.25L. The gas originally occupies 3.90L of space at 252K.
Answer:
[tex]T_2=339K[/tex]
Explanation:
Hello there!
In this case, according to the Charles' gas law as way to understand the volume-temperature as a directly proportional relationship for this problem, we can write:
[tex]\frac{T_2}{V_2}=\frac{T_1}{V_1}[/tex]
Thus, given the initial temperature and volume and the final volume, we are able to calculate the final temperature as follows:
[tex]T_2=\frac{T_1V_2}{V_1} \\\\T_2=\frac{252K*5.25L}{3.90L}\\\\T_2=339K[/tex]
Best regards!
What is the average time it took for the tablet to
dissolve in cold water?
Answer:
It might take 20-30 seconds to dissolve in water
Explanation:
Answer:
86
Explanation:
25 g of 116oC steam are bubbled into 0.2384 kg of water at 8oC. Find the final temperature of the system.
Answer: The final temperature of the system will be [tex]13.14^0C[/tex]
Explanation:
[tex]heat_{absorbed}=heat_{released}[/tex]
As we know that,
[tex]Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})[/tex]
[tex]m_1\times c_1\times (T_{final}-T_1)=-[m_2\times c_2\times (T_{final}-T_2)][/tex] .................(1)
where,
q = heat absorbed or released
[tex]m_1[/tex] = mass of steam = 25 g
[tex]m_2[/tex] = mass of water = 0.2384 kg = 238.4 g (1kg=1000g)
[tex]T_{final}[/tex] = final temperature = ?
[tex]T_1[/tex] = temperature of steam = [tex]116^oC[/tex]
[tex]T_2[/tex] = temperature of water = [tex]8^oC[/tex]
[tex]c_1[/tex] = specific heat of steam = [tex]1.996J/g^0C[/tex]
[tex]c_2[/tex] = specific heat of water= [tex]4.184J/g^0C[/tex]
Now put all the given values in equation (1), we get
[tex]25g\times 1.996J/g^0C\times (T_{final}-116)=-[238.4g\times 4.184J/g^0C\times (T_{final}-8)][/tex]
[tex]T_{final}=13.14^0C[/tex]
Therefore, the final temperature of the system will be [tex]13.14^0C[/tex]
what does binding energy measure
Answer:
"Electron binding energy, more commonly known as ionization energy, is a measure of the energy required to free an electron from its atomic orbital or from a solid. ... The atomic binding energy of the atom is the energy required to disassemble an atom into free electrons and a nucleus."
Explanation:
Hope this helps! <33
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have a wonderful day!
Binding energy is a required amount of energy that disperses the other particles of the reaction system. It measures the energy needed to free an electron or a subatomic particle.
What is binding energy?Binding energy is the ionization energy that depicts how much energy will be needed if an electron has to be removed from an atom for a reaction to occur.
It can be said that the energy required to free an electron from the orbit of the atom is measured in electron volt (eV). It is a little different from ionization energy as binding energy can remove any subatomic particle and not just an electron.
Therefore, the binding energy measures the freed subatomic particle.
Learn more about binding energy here:
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which of the following elements have the same number of valence electrons?
l. nitrogen (N)
ll. oxygen (O)
lll. fluorine (F)
lv. sulfur (S)
v. selenium (Se)
A. IV, and V
B. I, II, and III
C. I, II, and IV
D. II, IV, and V
The answer is II. Oxygen, IV. Sulfur, and V. Selenium.
Explanation:
Going down the list that was provided, we can use the periodic table of elements to determine the valence electrons.
- Nitrogen has 5 valence electrons
- Oxygen has 6 valence electrons
- Fluorine has 7 valence electrons
- Sulfur has 6 valence electrons
- Selenium has 6 valence electrons
Since oxygen, sulfur, and selenium all have 6 valence electrons, then that is the correct answer.
I hope this helps you!
can someone please try to help me
Answer:
I would say B all of these
AH for the reaction
IF5 (g) → IF3 (g) + F2 (g)
kJ, give the data below.
IF (8) + F2 (g) → IF3 (8)
IF (g) + 2F2(8) ► F5 (8)
AH=-390 kJ
AH=-745 kJ
A) -1135
B) +35
C) +1135
D) -35
E) +355
Answer:
E) +355 kJ
Explanation:
Based on Hess's law, it is possible to obtain ΔH of a reaction from the sum of similar reactions:
(1) IF(g) + F2(g) → IF3(g) ΔH = -390kJ
(2) IF(g) + 2F2(g) → IF5(g) ΔH = -745kJ
The sum of (1) - (2) is:
IF(g) + F2(g) → IF3(g)
IF5(g) → IF(g) + 2F2(g)
_________________
IF5(g) → IF3(g) + F2(g)
ΔH = -390kJ - (-745kJ)
ΔH = +355kJ
Right answer is:
E) +355 kJWhen reacting Na with Cl2 , we calculated that the theoretical yield should be 12.5 grams. Our actual yield was 13.0 grams. What is the percent yield?
Answer:
[tex]\boxed {\boxed {\sf 104 \%}}[/tex]
Explanation:
Percent ratio is the ratio of the actual yield to the theoretical yield. The formula is below.
[tex]Percent \ Yield} = \frac{{Actual \ Yield}}{{Theoretical \ Yield}} \times 100 \%[/tex]
The reaction of sodium and chlorine should theoretically yield 12.5 grams, but the actual yield was 13.0 grams.
actual yield= 13.0 gtheoretical yield = 12.5 gSubstitute these values into the formula.
[tex]Percent \ Yield} = \frac{{13.0 \ g }}{{12.5 \ g}} \times 100 \%[/tex]
Divide.
[tex]Percent \ Yield} = 1.04 \times 100 \%[/tex]
Multiply.
[tex]Percent \ Yield= 104 \%[/tex]
For this reaction, the percent yield is 104%
Which of these are vertebrate chordates? (Select all that apply.)
Ο) fish
Ο) humans
Ο) flatworm
Ο) mockingbird
Answer:
humans
Explanation:
vertebate chordates include animals , mammals also the fish option is correct
Explain A student wants to increase the maximum amount of sugar that can dissolve in water. She crushes the sugar and then stirs it into the water. Does this work?
Explanation:
When the student crushes sugar there there occurs an increase in the number of molecules or particles of sugar. This means that now more number of sugar particles (solute) are able to interact with water (solvent).
Therefore, there will be more number of collisions taking place between the solute and solvent molecules.
As a result, sugar will dissolve readily into water as there is an increase in interaction between solute and solvent particles.
Thus, we can conclude that when he crushes the sugar and then stirs it into the water then it will work as this leads to more interaction or collisions between the solute and solvent particles.
47.9 ml hrdrogen is collected at 26° Celsius and 718 torr. Find the volume occupied at STP
Answer:
41.45 mL
Explanation:
Applying the general gas equation,
PV/T = P'V'/T'............... Equation 1
Where P = Initial pressure of hydrogen, V = Initial volume of hydrogen, T= Initial Temperature of hydrogen, P' = Final pressure of hydrogen, V' = Final Volume of Hydrogen, T' = Final Temperature.
make V' the subject of the equation
V' = PVT'/TP'................ Equation 2
Given: P = 718 torr = (718×133.322) N/m² = 95725.196 N/m², V = 47.9 mL = 0.0479 dm³, T = 26 °C = (26+273) = 299 K, T' = 273 K, P' = 101000 N/m²
Substitute these values into equation 2
V' = ( 95725.196×0.0479×273)/(299×101000)
V' = 0.04145 dm³
V' = 41.45 mL
What is the percentage composition of C6H12O6? Must show work.
Answer:
I think the percent composition of carbon in C6H12O6 is: 25% C 40% C 7% C
Explanation:
Which three types of reactions yield a product that is a chemically bonded combination of reactants?
A. replacement, polymerization, decomposition
B. polymerization, decomposition, oxidation
C. decomposition, synthesis, replacement
D. oxidation, synthesis, polymerization
Answer:
D
Explanation:
i just got it right on edge
Answer:
It is D.
Explanation:
I also got it correct on edge :)
2. What is some ways composting can help make our food system more sustainable ?
Answer:
Organic waste in landfills generates, methane, a potent greenhouse gas. By composting wasted food and other organics, methane emissions are significantly reduced. Compost reduces and in some cases eliminates the need for chemical fertilizers. Compost promotes higher yields of agricultural crops.
Explanation:
Explain the laboratory preparation of hydrogen
Answer:
laboratory preparation off Hydrogen: Hydrogen is prepared in the laboratory by the action of the dilute hydrochloric acid or dilute sulphuric acid on granulated zinc. Use of Granulated Zinc Granulated zinc contains an impurity like copper which acts as a positive catalyyst.
Explanation:
Hope this helps!
Cutting, melting, bending, or crushing are examples of what kind of change?
Answer:
those are all physical changes and most physical changes can be undone like crushing a pice of metal you can flatten it back out you anwser is physical change
Explanation:
Answer:
It is a physical change because it can be reversed back and no new subtances is dormed.
NEED THIS LESSS THAN 5 MINUTES HELP!!! ITS 15 POINTSSWhich of the following is FALSE regarding meiosis?
Meiosis results in four genetically unique cells
Meiosis results in gametes with half the number of chromosomes as the parent cell Meiosis is a type of cell division that produces gametes
All of these answers are true regarding meiosis
Meiosis is what happens when body cells divide to form identical body cells
Answer:
This is false: Meiosis is what happens when body cells divide to form identical body cells.
Explanation:
Meiosis is what happens when body cells divide to form identical body cells
Create 3 multiple choice questions on
photosynthesis and the tropisms.
Number your questions using 1,2,3
and
your answer choices using a,b,c.
Example:
1)What three things are required in order for
photosynthesis to take place
A)Sugar, glucose plants
B)Radiant energy, water, oxygen
C)Radiant energy, water, carbon dioxide
Help ASAP!
A. chlorine
B. sulfur
C. oxygen
D. none of these
Answer: The correct answer is D
Explanation:
Outline the steps for a mass-mass stoichiometry problem.
8. List the 4 questions to answer when you find the charge on an ion
Answer:
Hope it helps u
Explanation:
FOLLOW MY ACCOUNT PLS PLS
Questions about the kind of charge, the magnitude of charge etc can be asked when the charge on an ion is determined.
What is an ion?An ion is a charged atom or a charged molecule. It attains a charged state because the number of electrons does not remain equal to the number of protons in the atom or the molecule.
The gain of a positive charge by an atom or a negative charge will depend on the fact that whether the number of electrons in an atom is greater than the number of protons or less than the number of protons.
If the atom loses electrons, the total proton number will be higher, so the atom will become positive. If the atom gains electrons, the total electron number will be higher, so the atom will be negative.
The attraction of an atom to another atom happens because it has an unequal number of electrons and protons, then the atom is called an ION. If the atom has more electrons than protons, it is a negative ion or ANION. If it has more protons than electrons, it is a positive ion.
Read more about ions, here
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how many grams are in 2.34 moles of Li?
Answer:
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Lithium, or 6.941 grams.
Thus, the answer would be 16.24194.
Explanation:
Describe how crude oil is formed.
Explanation:
crude oil takes thousands of years before forming.
it takes place when animals and plants die...later they decompose especially the ones in water ..the ones on land burn as fossil fuels and go back to the atmosphere through combustion..the decomposed materials turn into crude oil in the ocean where it's extracted and separated through fractional distillation into several oils such diesel, petroleum, coalter e.t.c
The pressure of a gas is reduced from 1220 mmHg to 836 mmHg as the volume of its container is increased by moving a piston from 85 mL to 350 mL. What would the final temperature (in Kelvin) be if the original temperature was 363 K?
Answer:
1024.24 K
Explanation:
From the question,
Applying the general gas eqaution
PV/T = P'V'/T'.................... Equation 1
Where P, V, and T = Initial pressure, initial volume and initial Temperature of the gas respectively, P', V' and T' = Final pressure, Final Volume and Final temperature of the gas respectively
make T' the subject of the equation
T' = P'V'T/(PV).................... Equation 2
Given: P = 1220 mmHg, V = 85 mL, P' = 836 mmHg, V' = 350 mL, T = 363 K
Substitute these value into equation 2
T' = (836×350×363)/(1220×85)
T' = 1024.24 K
Need help to find the molarity. Please help!
Answer:
0.092M
Explanation:
Molarity of glucose solution = number of moles ÷ volume
According to this question, 12.5g of glucose (C6H12O6) is dissolved in enough water to make 750mL of solution.
Molar mass of glucose (C6H12O6) = 12(6) + 1(12) + 16(6)
= 72 + 12 + 96
= 180g/mol
mole = mass/molar mass
mole = 12.5/180
mole = 0.069mol
Volume of solution = 750mL = 750/1000 = 0.750L
Hence, molarity = n/V
Molarity = 0.069 ÷ 0.750
Molarity = 0.092M
22. Most plates have a convergent boundary on one side and a
divergent boundary on the other. *
O a true
O b. false
Answer:
the answer for this question is true
Dinitrogen oxide (N2O) gas was generated from the thermal decomposition of ammonium nitrate and collected over water. The wet gas occupied 123 mL at 21◦C when the atmospheric pressure was 760 Torr. What volume would the same amount of dry dinitrogen oxide have occupied if collected at 760 Torr and 21 ◦C? The vapor pressure of water is 18.65 Torr at 21◦C. Answer in units of mL.
Answer:
119.98 mL
Explanation:
Initial volume V1 = 123 ml
Initial temperature = T1 = 21◦C + 273 = 294 K
Initial pressure P1 = 760 Torr - 18.65 Torr = 741.35 Torr
Final volume V2= ???
Final temperature = T2= 21◦C + 273 = 294 K
Final pressure P2 = 760 Torr
From;
P1V1/T1= P2V2/T2
P1V1T2 = P2V2T1
V2 = P1V1T2/P2T1
V2= 741.35 * 123 * 294/760 * 294
V2 = 119.98 mL
A 10 kg package is delivered to your house.
Use one complete sentence to describe an example of how work is done on the package as it gets brought inside.
Make sure to use proper spelling, grammar, and other language mechanics.
In your explanation, make sure to use the terms related to the formula for work (W = Fd).
Answer:
Explanation:
Work is a net force applied through a distance in order to displace an object, commonly abbreviated as W. A net force is the sum of all forces acting on an object. Work is mass times acceleration and distance so to find out the work you simply calculate the acceleration of the box being brought in. Next find the distance it was carried to get in the house. Then find out the mass of the box and finally multiply those sums together to get the amount of work put in to bring the package inside.