Answers
Answer:
follow the above attachment.
Explanation:
hope this will help...
Related Questions
The metal which burns with a white dazzling flame is:
a) silver
b) magnesium
c) gold
d) aluminum
Answers
Answer:
MagnesiumMagnesium burns with a dazzling white flame to form magnesium oxide a powdery mass.
Explanation:
Hope this helps you !!Answer:
b) Magnesium
Explanation:
According to G double O gle, it doesn't react with cold water but reacts to hot water/steam to form magnesium. Hydroxide and Hydrogen gas is released into the air!
What is the volume of HCl (r= 1.17 g / cm ^ 3, omega = 36 \%) required to precipitate silver in the form of AgCl from 2, 000 g of an alloy containing 22% by weight of Ag, if used 1.5 times the amount of precipitating reagent?
Answers
The volume of precipitating reagent, HCl required to precipitate silver in the form of AgCl from 2,000 g of an alloy containing 22% by weight of Ag is 0.530 L
In order to determine the volume of precipitating reagent, HCl required to precipitate silver in the form of AgCl from 2,000 g of an alloy containing 22% by weight of Ag, the following steps are followed:
Step 1.
The concentration of the HCl solution is calculated using the formula:
Molarity = percentage * specific gravity * 1000 cm³ / molar mass * 1 LPercentage purity of HCl = 36% = 0.36
specific gravity, r = 1.17 g/cm³
molar mass of HCl = 36.5 g/mol
Concentration of HCl = 0.36 * 1.17 * 1000 / 36.5 * 1
Concentration of HCl = 11.53 mol/L
Therefore, 1 L of HCl solution contains 11.53 moles of HCl
Step 2:
The equation of the dissociation of HCl solution is given below:
HCl (aq) ------> H⁺ (aq) + Cl⁻ (aq)1 mole of HCl produces 1 mole of Chloride ions, Cl⁻
Equation of reaction between Silver in the alloy and HCl is given as follows:
Ag (s) + H⁺Cl⁺ (aq) -----> AgCl (s)A white precipitate of AgCl is formed but hydrogen gas is not formed as Silver is a less reactive metal.
1 mole of HCl produces 1 mole of Cl⁻ which reacts with 1 mole of Ag to produce 1 mole of AgCl precipitate.
Step 3: Determine the mass and number of moles of silver in the alloy
Percentage of silver in the alloy = 22% = 0.22Mass of silver in 2000 g alloy = 0.22 * 2000 g
Mass of silver in 2000 g alloy = 440 g
Number of moles of silver in 440 g of silver is determined using the formula below:
number of moles = mass / molar massmolar mass of silver = 108 g/mol
number of moles of silver = 440 /108
number of moles of silver in the alloy = 4.074 moles
Step 4: Calculate the volume of HCl required
Since 1 mole of Cl⁻ ions react with 1 mole of Ag; 4.074 moles of Cl⁻ ions will be required to react with 4.074 moles of Ag.
1 L of HCl solution contains 11.53 moles of Cl⁻
Volume of HCl solution that contains 4.074 moles of Cl⁻ = 4.074 * 1L/11.53
Volume of HCl that contains 4.074 moles of Cl⁻ = 0.353 L
Since 1.5 times the amount of precipitating reagent HCl is required, volume of HCl required = 1.5 * 0.353 L
Volume of precipitating reagent HCl required = 0.530 L
Therefore, the volume of precipitating reagent, HCl required to precipitate silver in the form of AgCl from 2,000 g of an alloy containing 22% by weight of Ag is 0.530 L
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If 9 moles of P203 are formed, how many
moles of O2 reacted?
Answers
27 moles of O reacted
27 / 2 = 13.5 O2 reacted
round up to 14 moles of O2
calculate the mass percentage of each element in aluminum oxide.Then calculate themass of aluminum in a 3.62 gram sample of of aluminum
Answers
1. The mass percentage of each element in aluminum oxide Al₂O₃ are:
i. The mass percent of Al in Al₂O₃ is 52.9%
ii. The mass percent of O in Al₂O₃ is 47.1%
2. The mass of Al in 3.62 g of Al₂O₃ is 1.73 g
1i. Determination of the percentage of Al
Molar mass of Al₂O₃ = (2×27) + (3×16) = 102 g/mol Mass of Al of Al₂O₃ = 2 × 27 = 54 gPercentage of Al =?Percentage = mass / mass of sample × 100
Percentage of Al = (54 / 102) × 100
Percentage of Al = 52.9%
1ii. Determination of the percentage of O
Molar mass of Al₂O₃ = 102 g/mol Mass of O of Al₂O₃ = 3 × 16 = 48 gPercentage of O =?Percentage = mass / mass of sample × 100
Percentage of O = (48 / 102) × 100
Percentage of O = 47.1%
2. Determination of the mass of Al in 3.62 g of Al₂O₃.
102 g of Al₂O₃ contains 54 g of Al.
Therefore,
3.62 g of Al₂O₃ will contain = (3.62 × 54) / 102 = 1.73 g of Al.
Thus, 1.73 g of Al is present in 3.62 g of Al₂O₃.
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Please answer!!
No links.
Picture is included
The graph below displays the temperature and volume of a sample of a gas. What does the graph show.
A. The volume and temperature of the gas are not related
B. As the pressure of a gas increases its volume decreases
C. If the temperature of a gas doubles then its volume will also double
D. As the volume of the gas increases its temperature decreases
Answers
C. If the temperature of a gas doubles then its volume will also double.
Describe the factors that can be used to predict whether or not a nuclide is stable.
Answers
Facts about neutron:
James Chadwick discovered the neutron in 1932. He discovered it using this curious device which he made from pieces found in the laboratory.
Neutrons are very small indeed.
There are stars made of neutrons.
Neutrons are slightly heavier than protons.
Neutrons are made of three quarks.
What charge is a neutron?: Neutrons have no charge. Since opposite charges attract, protons and electrons attract each
Below the time line, list the layers from oldest to youngest
Answers
Answer:
F,E,D,C, B, A, G, H, I
Explanation:
I think. It goes bottom to top. the fault probably cause g to happen and maybe h but mattering on what caused what I am not positive
if atomic mass of Mg atom is 24g,find the mass of 1 Mg atom
Answers
Answer:
4×10^-23g
Explanation:
Given atomic mass of Mg = 24g
To find mass of 1Mg = ?
So its fix that the atomic mass of Mg 24 g is 6.022×10^23
Then the Atomic mass of 1 Mg atom is = 24 ÷ 6.022×10^23
= 4×10^-23 g
A car hits a bug with a force of 100N. With how much force does the bug hit the car?
(A). 10 N
(B). 100 N
(C). 1000 N
Answers
Answer:
B
Explanation:
actin and reaction force are equal Newton 3 law
A Air at a temperature of 134°C and atmospheric pressure flows with a velocity of 7 m/s over
a smooth 5 m long and 1 m wide cast iron plate. Under steady-state conditions, the air-side
surface temperature of the plates is at 120°C. Under the described conditions, determine the
overall heat transfer rate through the plate.
B-If the flat plate in (A) is replaced with a cylinder with the same surface area (heat transfer
area) and the cylinder's length is the same as the width of the plate (1.0 m), what would be the
heat transfer rate for cross air flow over the outside surface of the cylinder?
C. If the flat plate in (A) is replaced with a sphere with the same surface area (heat transfer area),
what would be the heat transfer rate for cross air flow over the outside surface of the sphere?
D- Based on your results, discuss which surface configuration is more effective for heat
Answers
°ω° Which statement best describes the skier? The skier has potential and kinetic energy. The skier has only potential energy. The skier has only kinetic energy. The skier does not have potential or kinetic energy. °ω°
Answers
How many molecules are there in an ideal gas with a volume of 7.27 L at STP?
number of molecules:
Answers
Answer:
n = 0.324 mol
Explanation:
PV = nRT
STP:
273.15K and 101.325kPa
n = PV/RT
n = (101.325kPa)(7.27L)/(8.314 L kPa/mol K)(273.15K)
n = 0.3243693408 mol
n = 0.324 mol
Hope that helps
Why do thermistors increase in conductivity when heated? What happens in normal metals? Explain on the atomic level.
Answers
Metal conductivity generally goes down or resistivity goes up with temperature goes up.
97.3 FM radio station broadcasts electromagnetic waves at a frequency of 97.3 megahertz (97.6 x 106 Hz). These radio waves travel at a
speed of 3.00 x 108 m/s. What is the wavelength of these radio waves?
*Include your units!
Round your answer to the nearest hundredth (2 decimal places).
Answers
The wavelength of the electromagnetic wave at the given frequency is 3.07 meters.
Given the following data:
Frequency =[tex]97.6 \times 10^6\; Hz[/tex]Speed = [tex]3 \times 10^8\;m/s[/tex]To determine the wavelength of the electromagnetic wave at the given frequency:
Mathematically, the wavelength of an electromagnetic wave is calculated by using the formula;
[tex]Wavelength = \frac{Speed }{frequency}[/tex]
Substituting the given parameters into the formula, we have;
[tex]Wavelength = \frac{3 \times 10^8}{97.6\times 10^{6}}[/tex]
Wavelength = 3.07 meters.
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Sodium chloride reacts with copper sulfate to produce sodium sulfate and copper chloride.
2NaCl(aq) + CuSO4(aq) → Na2SO4(aq) + CuCl2(s)
+
This equation represents a
O synthesis reaction.
O decomposition reaction.
O single replacement reaction.
O double replacement reaction.
O
Answers
Sodium chloride reacts with copper sulfate to produce sodium sulfate and copper chloride.
2NaCl(aq) + CuSO4(aq) → Na2SO4(aq) + CuCl2(s)
+
This equation represents a
O synthesis reaction.
O decomposition reaction.
O single replacement reaction.
O double replacement reaction.
Answer :double replacement reaction
ありがとう！
Sodium chloride reacts with copper sulfate to produce sodium sulfate and copper chloride. This equation represents a double replacement reaction. Therefore, the correct option is option D.
What is double replacement reaction?In a double replacement process, the ions in two input ionic compounds are exchanged for the same ions in two new product compounds. When two reactants swap cations or anions to produce two new products, the process is known as a double replacement reaction.
Double displacement reactions and metathesis reactions are other names for double replacement processes. Double replacement reactions include neutralisation, precipitation, and gas production. Sodium chloride reacts with copper sulfate to produce sodium sulfate and copper chloride. This equation represents a double replacement reaction.
Therefore, the correct option is option D.
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How many grams are in 2.0 × 1024 atoms of C?
Answers
Answer:
2.24 i think.
Explanation:
What holds the nucleus together? Group of answer choices alpha particles strong forces electrical forces between the protons beta particles
Answers
Answer:electrical forces between the protons
Explanation: The strong nuclear force pulls together protons and neutrons in the nucleus. At very small distances only, such as those inside the nucleus, this strong force overcomes the electromagnetic force, and prevents the electrical repulsion of protons from blowing the nucleus apart.
The gas in a 250. mL piston experiences a change in pressure from 1.00 atm to 2.25 atm. What is the new volume (in mL) assuming the moles of gas and temperature are held constant?
Answers
Answer:
111.11 mLExplanation:
Since the moles of gas and temperature are held constant the new volume can be found by using the formula for Boyle's law
[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]
where
P1 is the initial pressure
P2 is the final pressure
V1 is the initial volume
V2 is the final volume
From the question
P1 = 1 atm
P2 = 2.25 atm
V1 = 250 mL
We have
[tex]V_2 = \frac{250 \times 1}{2.25} = \frac{250}{2.25} \\ = 111.1111111...[/tex]
We have the final answer as
111.11 mLHope this helps you
If there is a name/surname you can't make out due to a speaker's manner of speech, what are you supposed to do?
Answers
We can call a person by the word gentleman and Sir or from his/her real name.
If there is a name/surname you can't make out due to a speaker's manner of speech then I will call him gentleman or Sir or I will ask him his real name. Gentleman is a word that is used for noble person and Sir word is also used in order to give someone respect.
Call a person with his real name is also comes under the manner of speech so we can conclude that we can call a person by the word gentleman and Sir or from his/her real name.
Learn more about manner of speech here:
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Apply Concepts
6. Describe the ecosystem in the picture.
Answers
Which law states that energy cannot be created or destroyed, but can change from one form to another?
- the law of conservation of energy
- the law of conservation of matter
- the law of gravity
- the law of motion
answer - (the law of conservation of energy)
Answers
Answer:
the law of conservation of energy
PLEASE HELP ME!! sue tomorrow:(
Answers
Answer:
If you are looking for the answer, for the question.
Earthquakes trigger tsunamis when the seismic activity causes the land along fault lines to move up or down
what is the continent bellow the world?
Answers
Answer:
antarcita
Explanation:
Answer:
What is the continent bellow the world?
Antarctica is the continent below the Earth.How many moles of CH, are present in a 13982.87 gram sample of CHg?
Answers
=13982.87/(12+1)
= 1,075.605384615385 moles
(Please someone help me!) (No links!)
Please ignore the blue dot, I accidentally pressed it and won't get rid of it!
Answers
Answer:
you picked the right one the net worth of force would be 10
Explanation:
how cuz you got 1 team with 6 force then aother 1 with 4 add em up u get 10
What makes the Earth go around the Sun?
Answers
Answer:
Just as the Moon orbits the Earth because of the pull of Earth's gravity, the Earth orbits the Sun because of the pull of the Sun's gravity. ... This happens because the Earth has a velocity in the direction perpendicular to the force of the Sun's pull.
Explanation:
What is always true about lenses?
Answers
Answer: They all bend light.
i don't know much about lenses so i hope this helps! :)
What is the job of cellular respiration?
Answers
Answer:
to break down sugar in the presence of oxygen to release energy in the form of ATP
Explanation: i just finished this chapter of the class
natural gas is methane. write the equation for complete combustion of methane.
Answers
Answer:
methane + oxygen → water + carbon dioxide CH4 + 2O2 → 2H2O + CO2
Explanation:
hope this helps
1. a Use the valence electron molecular orbital diagram for F2 to propose ground state F2ions that satisfy the following conditions
(1.5 points) (i) A F2 ion that is paramagnetic and that has a non-integer bond order.
(1.5 points) (ii) A F2 ion that is paramagnetic and that has an integer bond order.
(1.5 points) (iii) A F2 ion that is diamagnetic and that has a bond order of 3.
Clearly show the charge on your ion, label all valence molecular orbitals, and show the corresponding electrons in their orbitals. Full calculations for bond orders must be included.
b) Using only the valence electron molecular orbital diagram for F2, is a ground state diamagnetic ion with a bond order of 2 possible? Write one or two sentences to explain why or why not.