Answer:
D. The sum of the voltages of the half reactions is positive.
Explanation:
It's correct on apeex
The statement, that describes the redox conditions will produce a spontaneous reaction is "the sum of the voltages of the half-reactions is positive."
What is spontaneous reaction?A spontaneous reaction is one that favors the creation of products under the conditions of the reaction. It can move in a specific direction without being propelled by an external source of energy. If the standard electrode potential for the redox reaction is positive, the reaction is spontaneous.
If [tex]E^{0}[/tex] (redox reaction) is positive, the reaction will move onward (spontaneous). The redox conditions will cause a spontaneous reaction, and the sum of the half-reaction voltages is positive. Hence the correct option is D.
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Question 6 W If 50. mL of 1.0 M NaOH is diluted with distilled water to a volume of 2.0 L, the concentration of the resulting solution is А 0.025 M B 0.050 M C 0.10 M D 0.50 M E 1.0 M
Answer:
im not sure man
Explanation:
A 180-W resistor has 0.10 A of current through it. What is the potential difference across the resistor? Include numerical answer with correct units.
Ur a real one if u solve this no cap
And I only got 10 min to get the answer
Answer:
1800V
Explanation:
Given parameters:
Power in the resistor = 180W
Current = 0.1A
Unknown:
Potential difference = ?
Solution:
The power in a circuit is given as:
P = I V
P is the power
I is the current
V is the potential difference
Now insert the parameters and solve for V;
180 = 0.1 x V
V = 1800V
Number of H in 3(NH4)2Cro4
The number of H atoms in 3(NH₄)₂CrO₄ = 24
Further explanationThe empirical formula is the smallest comparison of atoms of compound forming elements.
A molecular formula is a formula that shows the number of atomic elements that make up a compound.
(empirical formula) n = molecular formula
Subscripts in the chemical formula indicate the number of atoms
The compound of 3(NH₄)₂CrO₄ ( 3 molecules of (NH₄)₂CrO₄ ) :
Number of H :
[tex]\tt 4\times 2(subscript)\times 3(coefficient,number~of~molecules)=24~atoms[/tex]
The number of Hydrogen (H) atoms in the compound, 3(NH₄)₂CrO₄ is 1.44×10²⁵ atoms
How to determine the mole of HMole of 3(NH₄)₂CrO₄ = 1 mole Mole of H in 3(NH₄)₂CrO₄ = 3 × 8 = 24 moles How to determine the number of atomsFrom Avogadro's hypothesis,
1 mole of H = 6.02×10²³ atoms
Therefore,
24 moles of H = 24 × 6.02×10²³
24 moles of H = 1.44×10²⁵ atoms
Thus, the number of atoms of H in 3(NH₄)₂CrO₄ is 1.44×10²⁵ atoms
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Object A has a mass of 500g and object B has a mass of 300g. Which object is more dense?
Answer:
500g because 300g is less dense than 500g its kinda like a weight
Explanation:
i
What is the wavelength of electromagnetic radiation which has a frequency of 4.464 x 10^14 s-1
a. 1.338 x 10^23 m
b. 1.489 x 10^-6 m
c. 6.716 x 10^-7 nm
d. 671.6 nm
Answer:
d. 671.6 nm
Explanation:
It is possible to solve the wavelength of a radiation from its frequency -or vice versa- using:
λ = c / f
Where λ is wavelength,
c is speed of light, a constant (2.998x10⁸m/s)
And f is frequency: 4.464x10¹⁴s⁻¹
Replacing:
λ = 2.998x10⁸m/s / 4.464x10¹⁴s⁻¹
λ = 6.716x10⁻⁷m
As 1m = 1x10⁹nm:
6.716x10⁻⁷m * (1x10⁹nm / 1m) = 671.6nm
Right answer is:
d. 671.6 nm
What is the mass in grams of 10 moles of ammonia, NH3?
A.
?
1.7 grams
B.
?
27 grams
C. ?
170 grams
D
?
0.587 grams
Answer:
C. 170 g.
Explanation:
multiply given moles by the molar mass of ammonia.
Which element has an electron configuration that ends in the fourth energy 1 point
level? *
D
ОО
C
Answer:
here
Explanation:
which is the halogen that is in Period 5? a. iodine (I) b. strontium (Sr) ... 4. Which is a transition element with five d-block electrons in energy level 4? ... Which region contains elements with an electron configuration that ends with p3? a. A b.
Missing: point | Must include: point
how many bonds can nitrogen have
Answer:
3
Explanation:
I think so, let me know if its wrong.
What is an example of conduction?Touching Touching a a stove stove and and burning burning your your handhandAn An old-old-fashioned fashioned radiatorradiatorHeat Heat from from a a firefireBatteriesBatteries
Answer:
Touching a stove and burning your your hand
Explanation:
Conduction is one of the three methods of heat transfer (the others being convection and radiation). Conduction involves the transfer of heat via direct contact with a solid medium. In conduction, heat or thermal energy moves from the hotter region to the colder region.
In this question, an example of conduction is the act of "Touching a stove and burning your your hand". The stove is acting as the solid medium here, with the heat being transferred from the hot object (stove) to the less hot one (hand) via touch (direct contact).
Answer:
so D the answer :/
Explanation:
What is the molar mass of strontium (Sr)?
O A. 38 g/mol
O B. 38g
O C. 87.62 g/mol
O D. 87.62 g
Answer:
C. 87.67 g/mol
Explanation: The molar mass of an atom is the mass of a singular atom. Therefore the molar mass of Strontium would be one mole of Strontium.
The molar mass of strontium (Sr) is 87.62 g/mol. Therefore, the correct option is C.
The atomic number of the chemical element strontium (Sr) is 38. According to the periodic table, it is a member of the alkaline earth metal group. Since the molar mass of strontium is 87.62 g/mol, one mole of strontium atoms weighs 87.62 grams.
Strontium is a soft, silvery-white metal with strong reactivity to both air and water. It is included in many minerals such as celestite and strontianite. It reacts like calcium. Strontium is employed in many different applications due to its chemical characteristics.
Therefore, the correct option is C.
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calculate the mass of the reactants in the synthesis of water from hydrogen and oxygen. PLEASE HELP
Answer:
noc
Explanation:
xd
Answer:
It is possible to fill a balloon with a mixture of hydrogen and oxygen and find that ... the following equation is balanced because the total mass of the reactants is ... of hydrogen and one mole of oxygen is equal to the mass of two moles of water.
Explanation:
ig this can be Explanation:
and the answer:)
What is Gallium Sulfide(Ga2S3).
Ionic or Covalent?
Which statement describes longwave radiation? Choose the correct answer.
O It does not affect Earth's energy budget.
O It is solar energy that falls on Earth's features.
O It makes up about 30% of the energy emitted by Earth.
O It is infrared radiation emitted after being absorbed by Earth's features.
Answer: D
Explanation: Heat resulting from the absorption of incoming shortwave radiation is emitted as longwave radiation
What is the percent composition for the compound NaBr? (8C)
A Na- 50%, Br- 50%
B Na- 22.99%, Br- 79.90%
C Na-22.99%, Br- 77.01%
D Na- 22.34%, Br- 77.66%
Answer:
the answer is D
Explanation:
percentage composition= mole of the substance divided by the total molar mass of the compound multiplied by 100.
If 1520 J are added to 16.5 g of water at 63.1 c what will the final temperature be
What type of plate boundary forms
snowy mountains?
J. convergent
K. divergent
L. transform
M. transition
Answer:
I believe it's j, convergent plate boundaries
The type of plate boundary that forms snowy mountains are convergent plate boundaries. option J is correct.
What are convergent plate boundaries?The convergent plate boundaries are which consist of two plates that move toward each other which results in the process called collision of two plates with each other.
The snowy mountains are full of snow which melts due to the change in temperature and leads to the formation of different plates and boundaries and the collision of two continental plates leads to the formation of this.
Therefore, option J is correct, the type of plate boundary that forms snowy mountains are convergent plate boundaries.
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Highlight the larger unit of measure under each letter (a-f). Then, write if the unit highlighted measures distance, volume, or weight (mass).
a. meter or kilometer
b. yard or foot
c. cup or quart
d. pound or ounce
e. liter or milliliter
f. gram or kilogram
Answer:
2. The unit could be gram or kilogram ⇒ answer f
3. The larger unit is kilogram and measures weight (mass)
Step-by-step explanation:
Let us revise the SI units of measuring
The SI unit of measuring distance is meter
The SI unit of measuring volume is liter
The SI unit of measuring mass is kilogram
2.
When this pet hamster is placed on a digital scale, the scale reads 1.5
∵ The SI unit of measuring weight (mass) is kilogram
∵ The scale reads 1.5
∴ The unit is kilogram
The unit could be gram or kilogram
3.
∵ The larger unit of measure is kilogram
∵ Kilogram measures the weight (mass)
∴ The unit measures weight (mass)
The larger unit is kilogram and measures weight (mass)
Explanation:
Why is radium more reactive than calcium?
Weight = mass *
O acceleration due to gravity
O height
O volume
O velocity
Answer:
acceleration due to gravity
The process in which the nuclei of two atoms combine to form a heavier atom, releasing a large amount of energy is known as -
Answer: Nuclear fusion
Explanation:Nuclear fusion is the process by which two or more atomic nuclei join together to form a single heavier nucleus and large amounts of energy.
Which of the following elements has the lowest lonization energy
A. Flourine
B. Francium
C. Hydrogen
D. Lithium
Answer:
Francium
Explanation:
Explanation:
B.francium................
I’ll mark you brainlist
Answer:
High mass star.
Explanation:
The mass of a star defines its life span. the least massive stars will live the longest and the most massive stars will use their fuel in a few million years and end in a spectacular supernova.
need help with this, please.
Answer:
See explanation
Explanation:
Potential energy here refers to energy that exists as a result of the relative position of the particles in a system.
Between figures 1 and 2 the potential energy of the system increases since the like charges repel when the distance between them is reduced.
Similarly, between 3 and 4, the potential energy of the system decreases since like charges attracts each other. Potential energy is inversely proportional to the force of attraction between the opposite charges hence potential energy decreases with decrease in distance.
The potential energy of the system decreases even more when one charge is +2 and the other is -1.
Based on the molecular structures of chloromethane and methane shown, a student makes the claim that a pure sample of chloromethane has stronger intermolecular forces than a pure sample of methane has.
Answer:
Yes, chloromethane has stronger intermolecular forces than a pure sample of methane has.
Explanation:
In both methane and chloromethane, there are weak dispersion forces. However, in methane, the dispersion forces are the only intermolecular forces present. Also, the lower molar mass of methane means that it has a lower degree of dispersion forces.
For chloromethane, there is in addition to dispersion forces, dipole-dipole interaction arising from the polar C-Cl bond in the molecule. Also the molar mass of chloromethane is greater than that of methane implying a greater magnitude of dispersion forces in operation.
Therefore, chloromethane has stronger intermolecular forces than a pure sample of methane has.
Yes, the claim that a pure sample of chloromethane has stronger intermolecular forces than a pure sample of methane is correct.
Intermolecular forces are weaker forces (Van Deer Waal forces) of attraction that pull molecules together. They are weaker than covalent bonds and they arise as a result of interaction between positively charged and negatively charged species (polarity).
The types of Van Deer Waal forces that exist are in decreasing order are:
dipole-dipole forcedipole-induced dipole forceinduced dipole-induced dipole forceIf we consider the molecular structures of both chloromethane and methane, we will realize that chloromethane has a higher intermolecular force than methane. This is due to the bond polarizability in chloromethane that does not exist in methane.
Thus, chloromethane exhibit a dipole-dipole force of attraction while methane undergoes a weak induced dipole-induced dipole force due to its lower polarity than chloromethane.
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in 4 season countries, the temperatire may drop till below 0°c during the peak of winter. why does the surface of the river or lake freeze?
Answer:
Explained below
Explanation:
Normally, when the temperature of water gets colder than 4° C, it starts expanding and will become less dense the colder it becomes. As the temperature gets closer to freezing point, the colder water will float to the top and the warmer water sinks to the bottom. This is mainly because of how the density of water behaves with falling temperatures.
Thus, the lake/river water will freeze from top to down as a a result of that phenomenon of colder water floating to the top and the warmer water sinking to the bottom.
2Mg + O2
2Mgo
what is the coefficient
Answer:
In this chemical equation, there are two main elements. Those elements are magnesium (Mg) and oxygen (O). Molecules are a group of atoms bonded together, and in this case, the oxygen molecules is O2, but not 2MgO because there are two different molecules in this compound. Coefficients are a number that multiply an entire molecule, and are also placed in front of it. In this case, O2 has no coefficient, but a subscript of 2. But, every molecule in this equation must have a coefficient and if add a coefficient of 1 to the oxygen molecule, it does nothing to the overall balancing of equations.
So, the answer: coefficient to the oxygen molecule is 2.
Have a great day/night, stay safe, and merry christmas!
How are two atoms of the same element alike?
Is it because they'll have the same make-up and both have the same amount of protons and neutrons??
Answer:
Explanation:
The nucleus of an atom contains neutrons and protons bonded tightly together. The same chemical element can have a different number of neutrons and still be the same element.
A student drops a ball from 5 feet above the ground. After bouncing once, it only reaches a maximum height of 4 feet above the ground. Use energy terms to explain why the ball did not reach its original height after bouncing once.
Answer:
because the gravity of the ball can't go that high
There is a law called conservation of energy which states that energy can neither be created nor be destroyed. It can be only transferred from one form to another form. Therefore, some energy is lost to the environment as sound or heat.
What is energy transfer?Energy transfer is a phenomenon in which energy transfer from one matter to another matter. Energy can be transferred in two forms that are by doing work or by transferring heat.
Heat can be transferred by three ways conduction, convention and radiation. In conduction, when two object are in direct contact, transfer of molecules takes place. As the ball impacted the ground, the energy would have been lost to the environment as sound or heat.
Therefore, some energy is lost to the environment as sound or heat.
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ANSWER THESE 5 MULTPLE CHOICE QUESTIONS!!!
I'LL GIVE 30 POINTS AND A BRAINIEST:)
Answer: 1, magnesium & mg
2, two energy shells
Explanation:
A material that conducts electricity only at high temperatures.
A.Semiconductor
B.Compound
C.Luster
D.Brittle
Answer:
Semiconductor
Explanation:
Semiconductors conduct electricity as the temperatures increase.
Hope this helped.