Answer:
The balloon would deflate
Explanation:
Suppose you needed to explain the concept of the mole to a junior high school student. What would you tell them?
Answer:
Explanation:
duehgjvcujhyeq bvckjfdsaeb gjdksghUIBGREQWMNHGTRE BAGTFEQA
PLEASE HELP!! NO LINKS PLEASE REAL ANSWER!!!!!
What will be volume of 20.0 g of CH4 gas at a pressure of 0.950 atm and temperature of 21.0 oc?Question 1 options:
A. 21.8 L
B. 31.8 L
C. 2.27 L
D. 4.27 L
How many grams water will condense when 56,500 joules of energy is removed from steam at its boiling point
Answer:
Start your streak by answering any question. You'll get bonus points from day 2.
What is [H⁺] in a 0.330 M solution of acrylic acid, CH₂CHCOOH (Ka = 3.16 × 10⁻⁵)?
Answer:
[H⁺] = 3.23x10⁻³ M
Explanation:
For a weak monoprotic acid, such as acrylic acid, we can calculate [H⁺] using the following formula if the solution concentration is significantly higher than the Ka:
[H⁺] = √(C * Ka)Where C is the weak acid concentration.
We input the data:
[H⁺] = [tex]\sqrt{0.330 M * 3.16x10^{-5}}[/tex]And solve for [H⁺]:
[H⁺] = 3.23x10⁻³ MWhat are the substances that interact to form new substances in a chemical reaction called?
A. Reactants
B. Products
C. Chemicals
D. Substances
Answer:
A. Reactants
Explanation:
A chemical reaction is the process in which atoms present in the starting substances rearrange to give new chemical combinations present in the substances formed by the reaction. These starting substances of a chemical reaction are called the reactants, and the new substances that result are called the products.
Carbon-14 has a half-life of 5,730 years. It is used in "carbon dating" to determine the age of once living organisms. How much of a 144 gram sample of C-14 will remain after 17,190 years have past.
Answer:
18 grams
Explanation:
Because 17,190 yrs divided by the amount of years it takes for a half-life to occur is 3. So 3 half life’s happen, so you divide 144/2 once, equaling 72. You divide 72/2 again (another half-life) and you get 36. You then calculate the third half life by dividing 36/2 which equals 18 grams.
Answer:
5730
Explanation:
Answer to Founders Education:)
A certain reaction has an activation energy of 51.02 kJ/mol. At what Kelvin temperature will the reaction proceed 4.50 times faster than it did at 365 K
Answer:
[tex]T_2=400.73K[/tex]
Explanation:
From the question we are told that:
Activation energy [tex]E_a= 51.02 kJ/mol.=>51.02*10^3J/mol[/tex]
Reaction Ratio [tex]\triangle K=4.50[/tex]
Initial Temperature [tex]T_1=365K[/tex]
Generally the equation for Final Temperature [tex]T_2[/tex] is mathematically given by
[tex]log \triangle K=\frac{E_a}{2.303R}*(\frac{T_2-T_1}{T_1T_2})[/tex]
Where
[tex]R=Gas constant[/tex]
[tex]R =8.3143[/tex]
Therefore
[tex]log 4.50=\frac{51.2*10^3}{2.303*8.31432}*(\frac{T_2-365}{365*T_2})[/tex]
[tex]log 4.50=7.328*\frac{T_2-365}{T_2}[/tex]
[tex]0.0892=\frac{T_2-365}{T_2}[/tex]
[tex]0.0892T_2=T_2-365[/tex]
[tex]365=T_2-0.0892T_2[/tex]
[tex]365=0.91T_2[/tex]
[tex]T_2=\frac{365}{0.91}[/tex]
[tex]T_2=400.73K[/tex]
Help solve the types of chemical reactions
[tex]1) \: decomposition[/tex]
[tex]2) \:hydrocarbon \: combustion[/tex]
[tex]3) \: formation[/tex]
[tex]4) \: double - replacement[/tex]
[tex]5 \: double - replacement[/tex]
[tex]6) \: formation[/tex]
[tex]7)double \: - replacement[/tex]
[tex]8) \: double - replacement[/tex]
One method of increasing the chances of particles colliding during a reaction is to...
1)decrease temperature
2) decrease concentration
3)increasing concentration
4)use a catalyst
Answer:
3
Explanation:
Increasing concentration
please help with Chem I DON'T HAVE ENOUGH TIME!
if a 119g sample of water was allowed to evaporate completely, what volume of water vapour would be produced in milliliters?
As 1 L = 1000 g
so 119 grams = 0.119000 L
Hope it is helpful to u
If yes then plz mark me brainlest
We are given:
Mass of water: 119 grams
We know that one mole of a gas occupies 22.4L of volume
Number of moles of water:
Number of moles = given mass / Molar mass
Number of moles = 119 / 18 [molar mass of water = 18 grams/mol]
Number of moles = 6.61 moles
Volume occupied:
Volume = number of moles * 22.4 L
Volume = 6.61 * 22.4
Volume = 148L
Volume (in mL) = 1.48 * 10⁻¹ mL
Given the reaction: N2(g) +2O2(g) ⇌ 2NO2(g) The forward reaction is endothermic. Determine which of the following changes would result in more product being produced.
I. Increase NO2
II. Decrease O2
III. Add a catalyst
IV. Increase the temperature
V. Increase the pressure
A. I and II
B. II, III, and V
C. IV and V
D. II and IV
Answer:
C
Explanation:
increasing the temperature will favour the forward reaction therefore the reaction system will try to counteract that by producing more heat and NO2 therefore increases the amount of products produced
increasing the pressure will favour the forward reaction as it has more moles of substance therefore if the forward reaction is favored, more product will be produced
Answer:
C.) lV and V
Explanation:
I got it correct on founders edtell
What locations are likely to be affected by an earthquake or tsunami?
San Francisco, California, USA
San Francisco, Tokyo, and Asunción
Tokyo, Japan
None of the locations
Asunción, Paraguay, South America
Answer:
All the locations can suffer earthquakes and a handful like tokyo tsunami so the question is either or so the anwer would be all
Explanation:
help me with questions 6,11,15,16 and 17 please
ayúdame con las preguntas 6,11,15,16 y 17 por favor
PLEASE HELP REAL ANSWER NO FILE. Part A
Electricity generated from any source comes with its own advantages and
disadvantages. So, no source of energy for generating electricity is perfect. However,
imagine that there is an energy source that perfectly meets the needs of society.
Describe this ideal source of energy. Include relevant factors such as cost, supply, safety,
reliability, and environmental impact
Answer:
Wind energy
Explanation:
An ideal source of energy needs to be reliable, cost effective, safe and must lead to almost zero adverse environmental impact.
Wind energy is energy obtained from air moving at high velocity. This energy is harvested using windmills which convert mechanical energy to electrical energy.
Wind is inexpensive because it occurs naturally. However, a large expanse of land is required in order to mount sufficient number of windmills that will generate enough electrical energy for practical purposes.
This method of electricity generation is safe and does not lead to any environmental hazard unlike the burning of fossil fuels, use of nuclear energy or loss of habitat due to hydroelectric power generation.
A helium-filled balloon contains 0.16 mol He at 101 kPa and a temperature of 23°C. What is
the volume of the gas in the balloon?
V = 3.9 L
Explanation:
Given:
T = 23°C + 273 = 296K
n = 0.16 mol He
P = 101 kPa = 0.997 atm
R = universal gas constant = 0.08205 L-atm/mol-K
V = ?
Using the ideal gas law,
PV = nRT
V = nRT/P
= (0.16 mil He)(0.08205 L-atm/mol-K)(296K)/(0.997 atm)
= 3.9 L
Jim makes a mixture which contains 10 mg of salt, 30 mg of sand, and some iron filings. The total mass of the mixture is 100 mg
Which amount of iron filings does Jim use in the mixture?
A10
B30
C40
D60
Answer:
Amount of iron fillings in mixture = 60 mg
Explanation:
Given:
Total mass of mixture = 100 mg
Amount of salt in mixture = 10 mg
Amount of sand in mixture = 30 mg
Find:
Amount of iron fillings in mixture
Computation:
Using Law of Conservation of mass;
Total mass of mixture = Amount of salt in mixture + Amount of sand in mixture + Amount of iron fillings in mixture
100 = 10 + 30 + Amount of iron fillings in mixture
100 = 40 + Amount of iron fillings in mixture
Amount of iron fillings in mixture = 100 - 40
Amount of iron fillings in mixture = 60 mg
The electrolyte magnesium chloride (MgCl2) will break up into how many individual particles in water (what is the i value)?
Answer:
Solid magnesium chloride is a non-conductor of electricity because the ions aren't free to move. However, it undergoes electrolysis when the ions become free on melting. Magnesium chloride dissolves in water to give a faintly acidic solution (pH = or 6).
hydrogen chloride, hydrogen nitrate (v), sodium chloride, sodium hydroxide. Name a substance known as common salt
Answer:
C: Sodium chloride
Explanation:
Common salt is gotten when sodium atoms reacts with chlorine atoms in an exothermic reaction to form an ionic substance known as sodium chloride with the chemical formula NaCl.
Equation is;
2Na + Cl2 = 2NaCl
Looking at the options, the correct one is Sodium chloride.
please help- science
1. - new
2. full
3. first quarter
4. last quarter
Answer:
2. Full
Explanation:
A lunar eclipse occurs at a full moon when Earth is directly between the moon and the sun. During a lunar eclipse, Earth blocks sunlight from reaching the moon.
Hope this helps!!
Compute the number of electrons that each lead atom donates, on average, to a bulk piece of lead metal. Room temperature data for lead: The conductivity of lead is 4.90 × 104 1/(Ω·m) The electron mobility of lead is 2.3 cm2/(V·s) The mass density of lead is 11.4 g/cm3 The atomic weight of lead is 207 g/mol
Answer:
4 electrons/atom
Explanation:
The conductivity of the lead σ = neμ where n = electron density, e = electron charge = 1.602 × 10⁻¹⁹ C and μ = electron mobility of lead = 2.3 cm²/(V·s) = 2.3 × 10⁻⁴ m²/(V.s)
Making n subject of the formula, we have
n = σ/eμ
Since σ = 4.90 × 10⁶ (Ω·m)⁻¹
Substituting the values of the variables into the equation, we have
n = σ/eμ
n = 4.90 × 10⁶ (Ω·m)⁻¹/(1.602 × 10⁻¹⁹ C × 2.3 × 10⁻⁴ m²/(V.s))
n = 4.90 × 10⁶ (Ω·m)⁻¹/(3.6846 × 10⁻²³ Cm²/(V.s))
n = 1.33 × 10²⁹ electrons/m³
We now find the number of moles of lead present in 1 m³ of lead.
So n' = ρ/M where ρ = density of lead = 11.4 g/cm³ = 11.4 g/cm³ × 10⁶ cm³/m³ = 11.4 × 10⁶ g/m³ and M = atomic weight of lead = 207 g/mol
So, n' = ρ/M
N = 11.4 × 10⁶ g/m³/207 g/mol
n' = 0.0551 × 10⁶ mol/m³
n' = 5.51 × 10⁴ mol/m³
Since n' = N/N' where N = number of atoms of lead in 1 m³ of lead and N = Avogadro's constant = 6.022 × 10²³ mol⁻¹
N = n'N' = 5.51 × 10⁴ mol/m³ × 6.022 × 10²³ mol⁻¹
N = 33.18 × 10²⁷ atoms/m³
N = 3.318 × 10²⁸ atoms/m³
So, the number of electron per atom is N" = n/N
= 1.33 × 10²⁹ electrons/m³ ÷ 3.318 × 10²⁸ atoms/m³
= 0.4 × 10¹ electrons/atom
= 4 electrons/atom
What happens to iron when it melts?
O A. It undergoes a chemical change.
O B. It undergoes a physical change.
O c. Its atoms break apart and form new atoms.
O D. Its atoms combine and form new atoms.
Answer:
B. It undergoes a physical change.
Explanation:
Hello there!
In this case, since we know that chemical changes lead to the formation of new atoms and/or compounds due to the bonds rearrangement of the initial substances and the physical changes occur without changing the composition of the initial substances, we can infer that, since melting is a process that changes the phase of matter from solid to liquid without changing the identity of the initial substance, the answer to this question would be B. It undergoes a physical change. because the other options describe chemical changes.
Best regards!
Answer:
B. It undergoes a physical change.
Explanation:
At room temperature, the iron atoms are in an unusual loosely packed open arrangement; as iron is heated past 912 degrees Celsius, the atoms become more closely packed before loosening again at 1,394 degrees Celsius and ultimately melting at 1,538 degrees Celsius.
Solid AgCl (Ksp = 1.8 X 10-10) is placed in a beaker of water. After a period of time, the Ag+ concentration is measured and found to be 2.5 X 10-7 M.
a) What is the concentration of Cl-?
b) Has the system reached equilibrium?
c) Will more AgCl dissolve?
Explanation:
a)
[tex]k _{sp} = [Ag {}^{ + } ][Cl {}^{ - } ] \\ but \: [Ag {}^{ + } ] = [Cl {}^{ - } ] \\ k _{sp} = [Ag {}^{ + } ] {}^{2} \\ [Ag {}^{ + } ] = \sqrt{k _{sp}} \\ = \sqrt{1.8 \times {10}^{ - 10} } \\ = 1.34 \times {10}^{ - 5} mol {dm}^{ - 3} [/tex]
b)
It has not reached equilibrium because the silver concentration is not yet equal to the value of Ksp.
c)
Yes it will dissolve in order to establish the equilibrium.
Alkenes provide many ways for incorporating oxygen atoms at specific locations in our molecule.
a. True
b. False
Answer:
True
Explanation:
Answer:
True
hope it is helpful to you
A cylindrical rod of copper (E = 110 GPa) having a yield strength of 240 MPa is to be subjected
to a load of 6660 N. If the length of the rod is 380 mm, what must be the diameter to allow an
elongation of 0.50 mm?
Answer:
required diameter is 7.65 mm
Explanation:
Given the data in the question;
F = 6660 N
l₀ = 380 mm = 0.38 m
E = 110 GPa = 110 × 10⁹ N/m²
Δl = 0.50 mm = 0.0005 m
So, lets assume the deformation is elastic;
d₀ = √( [4l₀F] / [πEΔl] )
we substitute
d₀ = √( [4 × 0.38 × 6660] / [π × (110 × 10⁹) × 0.0005]] )
d₀ = √( 10123.2 / 172787595.947 )
d₀ = √( 5.85875 × 10⁻⁵ )
d₀ = 0.007654 m
d₀ = ( 0.007654 × 1000 )mm
d₀ = 7.65 mm
Therefore, required diameter is 7.65 mm
Which statements describe the types of energy emitted by the Sun? Check all that apply.
A. It emits most of its energy in gamma rays.
B. It emits all wavelengths in the electromagnetic spectrum.
C. It emits most of its energy as visible light.
D. Its peak wavelength is in the orange-yellow range.
E. It emits no X-rays or radio waves.
F. Its peak wavelength is in the yellow-green range.
Answer:
a,c,b
Explanation:
Which best describes the total mass of substances before and after a
combustion reaction?
A. The mass is the same because atoms are not created or
destroyed.
B. The mass is greater after the reaction because the number of
atoms increases.
C. The mass is the same because the molecules do not change.
D. The mass is less after the reaction because gases are produced.
Answer:
B. The mass is greater after the reaction because the number of
atoms increases.
Which of the compounds shown are structural
isomers of this compound? Check all that apply.
A
B
С
D
Answer:
A & C
Explanation:
The next one is A Edge 2022
The compound which are the structural isomers of the given compound is compound A & C.
What are structural isomers?Structural isomers are those isomers in which which are having the same molecular formula but different structural structures.
Compound A: A is the structural isomer of the given compound as they both have same number of carbon and hydrogen atoms present in that.Compound B: B is not the structural isomer of the given ompound as they have not equal number of carbon and hydrogen atoms in it.Compound C: C is the structural isomer of the given compound as they both have same number of carbon and hydrogen atoms present in that.Compound D: D is not the structural isomer of the given ompound as they have not equal number of carbon and hydrogen atoms in it.Hence A & C are the structural isomers of given compound.
To know more about structural isomers, visit the below link:
https://brainly.com/question/26298707
What is the initial and final mass of the zinc and copper?
Answer:the final mass of copper is 3.84 g. There was an increase in mass of 1.84 g from the initial mass of 2.0 g.
Explanation:
why do we have to write the background of the study
Answer:
Writing down background information can help you to remember what you learned and can be used for notes in the future when taking an assessment.
Explanation:
Can I get brainliest? It's for a challenge
2+4 help please i will fail 6th grade
Answer:
6
Explanation:
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