Answer:
0.32 g
Explanation:
First, we find the number of moles n of silver deposited.
n = m/M where m = mass of silver deposited = 1.08 g and M = Atomic weight of silver = 108 g/mol
n = m/M = 1.08 g/108 g/mol = 0.01 mol
Now, the quantity of electricity Q = nF where n = number of moles of silver = 0.01 mol and F = Faraday's constant = 96500 C/mol
Q= nF = 0.01 mol × 96500 C/mol = 965 C
By the chemical equation for copper,
Cu²⁺ + 2e ⇒ Cu
2 moles of electrons deposits 1 mol of copper, that is
2 × 96500 C deposits 1 mol of copper, then 965 C will deposit x mol
x = 1 mol × 965 C/2 × 96500 C = 1/200 mol = 0.005 mol of copper
So, we find the mass of 0.005 mol of copper using
n = m/M where m = mass of copper deposited = unknown and M = Atomic weight of copper = 63.54 g/mol and n = number of moles of copper = 0.005 mol
m = nM
= 0.005 mol × 63.54 g/mol
= 0.32 g
How many moles of CO2 can form from 5.1 moles of C3H8 and abundant O2 in the equation:
C3H8 + 5O2 -> 3CO2 + 4H2O
Answer:
15.3 moles of CO₂ formed.
Explanation:
Given data:
Number of moles of CO₂ formed = ?
Number of moles of C₃H₈ react = 5.1 mol
Solution:
Chemical equation:
C₃H₈ + 5O₂ → 3CO₂ + H₂O
Now we will compare the moles of CO₂ with C₃H₈.
C₃H₈ : CO₂
1 : 3
5.1 : 3/1×5.1 = 15.3 mol
Hello there please help this is for science and if you answer thanks for the help you earned yourself a 5 star.
Answer:
Ice cubes, glass of tea, and butter
Explanation:
Like it said in the hint, the molecules will only speed up if they gain heat. This means in order for the object to heat up it will have to have a temperature that is less than the temperature in the room. Ice cubes, glass of tea, and butter are the three objects that have a temperature less than 72 degrees so when they are placed in the 72 degrees room they will heat gain heat (therefore making the molecules move faster)
Plants appear green because the chlorophyll reflects green light from the sun.
True
False
Answer: that should be true if not look it up :)
Explanation:
Which of the following elements is most reactive.
A Chlorine
B Bromine
C Fluorine
D Helium
Answer:
c.
Fluorine
Explanation:
group viia elements are very active non metals give reason
Answer:
because they need only one electron
Which of the following double-replacement reactions will occur?
NaBr(aq) + AgNO3(aq) →
NaBr(aq) + Ca(NO3)2(aq) →
NaBr(aq) + Al(NO3)2(aq) →
NaBr(aq) + KNO3(aq) →
NaBr(aq) + AgNO3(aq) →NaNO3(aq) + AgBr(s)⇒ double-replacement reactions will occur
Further explanationDouble-Replacement reactions. Happens if there is an ion exchange between two ion compounds in the reactant to form two new ion compounds in the product
A double replacement reaction will occur if one or both of the products is an insoluble precipitate, a liquid, or a gas
To predict whether this reaction can occur or not is one of them, the precipitation reaction. A precipitation reaction occurs if two ionic compounds which are dissolved reacted to produce one of the products of the ion compound does not dissolve. Formation of these precipitating compounds that cause reactions can occur
Solubility Rules:
• 1. soluble compound
All compounds of Li +, Na +, K +, Rb +, Cs +, and NH4 +
All compounds of NO₃⁻ and C₂H₃O₂⁻
Compounds of Cl−, Br−, I− except Ag⁺, Hg₂²⁺, Pb²⁺
Compounds of SO₄²⁻ except Hg₂²⁺, Pb²⁺, Sr²⁺, Ba²⁺
• 2. insoluble compounds
Compounds of CO₃²⁻ and PO₄³⁻ except for Compounds of Li +, Na +, K +, Rb +, Cs +, and NH₄ +
Compounds of OH− except Compounds of Li +, Na +, K +, Rb +, Cs +, NH₄⁺ , Sr²⁺, and Ba²⁺
NaBr(aq) + AgNO3(aq) →NaNO3(aq) + AgBr(s)⇒ occur
NaBr(aq) + Ca(NO3)2(aq) → NaNO3(aq) + CaBr₂(aq)⇒not occur
NaBr(aq) + Al(NO3)3(aq) →NaNO3(aq) + AlBr3(aq)⇒not occur
NaBr(aq) + KNO3(aq) →NaNO3(aq) + KBr(aq)⇒not occur
Why doesn’t the nucleus fly apart?
A strong force - called the strong nuclear force - holds protons and neutrons together in the nucleus.
The formation of an ionic compound involves the transfer of electrons. The removal of one or more electrons from a metal is a process that _____ energy, whereas the addition of one or more electrons to a nonmetal _____ energy.
Answer:
Absorbs, Releases
Explanation:
The formation of an ionic compound involves the transfer of electrons. The removal of one or more electrons from a metal is a process that absorbs energy, whereas the addition of one or more electrons to a nonmetal releases energy.
Answer:
Absorbs
Release
Explanation:
The formation of ionic compounds occurs between two kinds of atoms having a large electronegativity difference (Δx ≥ 0.7) e.g metals (like those in group IA and IIA) and non-metals(like those in groups VIA and VIIA). The formation of an ionic bond involves the transfer of electron(s) from the less electronegative atom (metal) to the more electronegative atom (non-metal) such that the two kinds of atoms now have a completely filled outer shell like the noble gas.
MARKING BRAINLIEST!
plant or animal and to explain the reasoning for their conclusion. What is the correct response?
The cell is an animal cell because it has a cell membrane and no cell wall. Cell walls are unique to plant cells.
The cell is a plant cell because it has cytoplasm, which helps the plant make their own food from sunlight.
The cell is a plant cell because it has chloroplast, which helps the plant make its own food from sunlight.
The cell is an animal cell because it has chloroplast used for making useable energy.
Answer:c is correct
Explanation:
Characteristics of the water at the mountain source: Speed: Temperature Oxygen Level Nutrient Level
Describe the characteristics of the water at the mountain source:
Answer:
The answer is below
Explanation:
Speed: there will be faster speed due to the steep slope movement of water from the mountain.
Temperature: there will be lower temperatures as a result of the faster speed of water movement which reduces the influence of solar radiation on it.
Oxygen: the oxygen content is higher due to little or no residue particles present in it.
Nutrient Level: this is considered somewhat low as a result of the water coldness and speed which does not support the nutrition base to form.
What is the law of conservation of energy? a. Energy is created and destroyed. b. Energy is not created but is destroyed. c. Energy is created but not destroyed. d. Energy is neither created nor destroyed pls help
Answer:
Energy is neither created nor destroyed.
Explanation:
The law of conservation of energy states that energy can neither be created nor be destroyed. The total energy of an isolated system remains conserved. It never gets 0. It changes from one form of energy to other but never vanishes.
Hence, the correct option is (d) "Energy is neither created nor destroyed"
the characterstic part of a molecule that determines its chemical properties is known as
Answer: The atomic number indicates the number of protons within the core of an atom. The atomic number is an important concept of chemistry and quantum mechanics. An element and its place within the periodic table are derived from this concept. ... These electrons mainly determine the chemical behaviour of an atom. The chemical properties of an element, are determined by the number of protons in the nucleus. This number of protons is called the atomic number. The mass of the atom, its atomic mass, depends upon the sum of the number of protons and the number of neutrons present in the nucleus.
Hope this helps....... Stay safe and have a Merry Christmas!!!!!!! :D
Explanation:
Outer Electrons/Valence Electrons determine the chemical properties....Or Somehow we can say in organic compounds, functional group determine mostly chemical properties...
CAN SOMEONE HELP ME ON THIS!!! THIS IS VERY URGENT
Answer:
Explanation:
3: Given data:
Number of moles of strontium nitrate = 3.00×10⁻³ mol
Number of atoms = ?
Solution:
There are 9 moles of atoms in 1 mole of Sr(NO₃)₂.
In 3.00×10⁻³ moles,
9 mol × 3.00×10⁻³
27.00×10⁻³ mol
Number of atoms in 3.00×10⁻³ mol of Sr(NO₃)₂:
27.00×10⁻³ mol × 6.022×10²³ atoms / 1mol
162.59×10²⁰ atoms
4)Given data:
Mass of calcium hydroxide = 4500 Kg (4500/1000 = 4.5 g)
Number of moles = ?
Solution:
Number of moles = mass in g/molar mass
by putting values,
Number of moles = 4.5 g/ 74.1 g/mol
Number of moles = 0.06 mol
5) Given data:
Number of atoms of silver nitrate = 1.06×10²³
Number of moles = ?
Solution:
1 mole of any substance contain 6.022×10²³ atoms .
1.06×10²³ atoms × 1 mol / 6.022×10²³ atoms
0.176 moles of silver nitrate
MARKING BRAINLIEST! AND 16 POINTS
Plants use energy from sunlight, water, and carbon dioxide to produce sugar. What structure is found only in plant cells and helps plants capture energy from sunlight?
Answer:
Chloroplast.
Explanation:
Answer:
chlorophat
Explanation:
How dose nuclear energy can be transform form one form to another form
Explanation:
Nuclear energy is found in the nucleus of an atom holding nuclear materials in place.
When a nuclear decay or fusion occurs, the energy is released.
Most times, the nuclear energy is transformed into heat energy. The heat energy is used to do other forms of work that converts energy from one form to another. It can be converted to mechanical energy when water is boiled and used to drive turbines. It can be used in heating chambers. this and many more can lead to energy transformationlimitation of hydrogen displacement method
Answer:
Limitation of hydrogen displacement method is described below in detailed explanation.
Explanation:
This approach is beneficial for elements that can displace hydrogen from psychedelics or can consolidate with hydrogen. A single replacement effect, sometimes described as a single displacement reaction, is a reflection in which one component is replaced for a different component in a compound. The origin elements are forever pure elements, such as a clear zinc metal or hydrogen propellant, plus an aqueous compound.
Which two statements are true about redox reactions?
A. They include both oxidation and reduction reactions,
B. Electrons are transferred.
C. They are double-replacement reactions.
D. They are acid-base reactions,
Answer:
A. They include both oxidation and reduction reactions AND B. Electrons are transferred.
Explanation:
a p e x
The statements that are true about redox reaction are:
A. They include both oxidation and reduction reactions,
B. Electrons are transferred.
What is a redox reaction?The Redox reaction is the one in which oxidation and reduction take place simultaneously. In this process transfer of electrons takes place which further leads to oxidation or reduction.
Thus, options A and B are correct.
Find more information about Redox reaction here:
brainly.com/question/21851295
Imagine that you have an ideal gas in a 4.30 L container, and that 1250 molecules of this gas collide with a square-inch area of the container at any given instant. If the volume is increased to 21.5 L at constant temperature, how many collisions will occur per square inch of this larger container
Answer:
250 collisions per square inch
Explanation:
According to Boyle's law, at constant temperatures, the pressure exerted by gas molecules is inversely proportional to the volume of the gas. Hence;
P1V1 = P2V2 where P1 = initial pressure, V1 = initial volume, P2 = final pressure, and V2 = final volume
In this case, the collision that occurred is taken as the pressure.
P1 = 1250, V1 = 4.30 , V2 = 21.5 P2 = ?
P2 = P1V1/V2
= 1250 x 4.30/21.5
= 250
Hence, at a constant temperature, 250 collisions per square inch of the larger container will occur.
Como se consiguió el interior de un atomo
Answer:
A través del Experimento de Rutherford.
Explanation:
El experimento de la lámina de oro fue realizado en 1909 por Ernest Marsden y Hans Geiger bajo el liderazgo de Ernest Rutherford. En este experimento, se bombardeó una lámina de oro con partículas alfa y se detectó su dispersión. Se encontró que una pequeña proporción de las partículas regresan cerca de la fuente. Estos resultados fueron la base para el lanzamiento de un nuevo modelo atómico con un núcleo central cargado positivamente y con electrones cargados negativamente con pequeñas masas en relación con el núcleo y distribuidos a su alrededor.
How many grams are there in a 14.5 moles lithium permanganate
There are 1825.6 g in a 14.5 moles Lithium permanganate
Further explanationThe mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
Moles can also be determined from the amount of substance mass and its molar mass :
[tex]\tt mol=\dfrac{mass}{MW}[/tex]
moles of Lithium permanganate = 14.5
Lithium permanganate (LiMnO4) MW=125.9 g/mol, so mass :
[tex]\tt mass=mol\times MW\\\\mass=14.5\times 125.9~g/mol\\\\mass=1825.6~g[/tex]
Name 3 types of rock on Planet Earth.
Answer:
igneous, sedimentary, and metamorphic
Explanation:
Answer:
IGNEOUS ROCKS form when molten rock (magma or lava) cools and solidifies. SEDIMENTARY ROCKS originate when particles settle out of water or air, or by precipitation of minerals from water.
And METAMORPHIC (I dont have nothing for this won)
Explanation:
Which term means that a metal can be made into wire?
A)
Luster
B)
Ductility
Malleability
D)
Conductivity
Answer:
c
Explanation:
i think
Help ASSSAPPPP I WILL MARK BRAINLIEST. What is the outer electron configuration for tin?
Answer:
hope this helps!
How do you find the amount of moles is .032 grams of water and whats the answer
Answer:
[tex]\boxed {\boxed {\sf 0.0018 \ mol \ H_2 O }}[/tex]
Explanation:
First, we need to find the molecular mass of water (H₂O).
H₂O has:
2 Hydrogen atoms (subscript of 2) 1 Oxygen atom (implied subscript of 1)Use the Periodic Table to find the mass of hydrogen and oxygen. Then, multiply by the number of atoms of the element.
Hydrogen: 1.0079 g/mol Oxygen: 15.9994 g/molThere are 2 hydrogen atoms, so multiply the mass by 2.
2 Hydrogen: (1.0079 g/mol)(2)= 2.0158 g/molNow, find the mass of H₂O. Add the mass of 2 hydrogen atoms and 1 oxygen atom.
2.0158 g/mol + 15.9994 g/mol = 18.0152 g/molNext, find the amount of moles using the molecular mass we just calculated. Set up a ratio.
[tex]0.032 \ g \ H_2 O* \frac{ 1 \ mol \ H_2 O}{18.0152 \ g \ H_2 O}[/tex]
Multiply. The grams of H₂O will cancel out.
[tex]0.032 * \frac{1 \ mol \ H_2 O}{18.0152 }[/tex]
[tex]\frac{0.032 *1 \ mol \ H_2 O}{18.0152 }[/tex]
[tex]0.00177627781 \ mol \ H_2 O[/tex]
The original measurement given had two significant figures (3,2). We must round to have 2 significant figures. All the zeroes before the 1 are not significant. So, round to the ten thousandth.
The 7 in the hundred thousandth place tells us to round up.
[tex]0.0018 \ mol \ H_2 O[/tex]
There are about 0.0018 moles in 0.032 grams.
Almost all of Earth's atmosphere is created through the process of photosynthesis.
True
False
Answer:
ture
Explanation:
trees, plants is what keeps us alive
If you have 2 of the same substance and they are at the same temperature but have a different amount, what changes?
Answer:
The heat energy stored within them changes
Explanation:
Heat energy is a function of the mass of a body, its specific heat capacity, and its temperature.
In this case, the bodies have the same specific heat capacity since they are made from the same material and the same temperature.
To get the quantity of heat stored in a body, we need to multiply all three parameters as shown below
[tex]Q = mC \Delta T[/tex]
An increase in mass, through an increase in the amount of substance of a material present, will cause a corresponding increase in the heat energy stored within the material
PLEASE HELP PLEASEEE JUST 1 QUESTION
The answer i got was C so I would pick C
1. What volume would be occupied by 2.0 mol nitrogen, N2, gas at 0°C and 1 atm? Volume
Answer:
V = 44.83 L
Explanation:
Given data:
Volume of nitrogen gas = ?
Number of moles = 2.0 mol
Temperature = 0°C
Pressure = 1atm
Solution:
The given problem will be solve by using general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
Now we will convert the temperature.
0+273 = 273 K
1 atm× V = 2.0 mol × 0.0821 atm.L/mol.K × 273K
1 atm× V = 44.83 atm.L
V = 44.83 atm.L / 1 atm
V = 44.83 L
5. Which is NOT true about mixtures?
A. Mixtures are physical combination of only one substance.
B. Mixtures can be homogeneous and heterogeneous.
C. Mixtures are physical combination of two or more substance.
D. Mixtures can be separated in different processes.
Examine the chemical reaction.
C3H8+—>4H2O+3CO2
What coefficient of Oz should be added so the number
of atoms of oxygen is conserved on both sides of the
reaction equation?
i don’t know if this is chemistry
Answer:
5
Explanation: