Answer:
7.81 moles
Explanation:
(4.7×10^24 )×1 moles divided by 6.02×10^23 molecules
How many moles of O2will be produced from 6.2 moles of water?
Answer:
I hope This will help you....and please mark me as Brilliant
Explanation:
The formula, H2O tels us that there are the same number of moles of Oxygen as there are of water. The (understood )molecular coefficient of H2O is 1. The (understood ) coefficient of O in the formula is also 1. The number of moles of oxygen is the same as the number of moles of water. This is moles of oxygen atoms. If the question wants moles of oxygen gas, O2, then it will be half as many I think that is what they want, so I would answer 3.1 moles of O2.
Which plate is the South American plate?
Web
D
O A D
B. A
C. B
В
D C
Answer:
C. B
Explanation:
The correct plate is showing n the green color that is of South America and is a major tectonic plate. The plate belongs to the south American continent and forms the southernmost part of the mid-Atlantic ridge. According to the plate movement, it's still moving to the west away from the Atlantic ridges due to the seafloor spreading. Has The plate has an approx area of 43,600,000 km square.Examine the diagram that shows the levels of organization of an organ system.
αμματα
1
2
3
If level 2 becomes diseased, what is a possible consequence?
The organ system will generate more cells to create a new organ to replace the diseased component.
The organ will fail to function properly, affecting the organ system and consequently the organism.
The cells will bypass creating tissues, creating the organ directly to limit the spread of the disease to the organism.
The organ will temporarily shut down until the disease is repaired with the replication of new cells.
Answer:
lol
Explanation:
Answer:
I think its B maybe
Explanation:
A solid has a fixed ___________________ and a fixed ____________
Answer:
Shape and volume
hope this helps
have a good day :)
Explanation:
Instructions:
Balance chemical equations on bach side by multiplying the molecular or ionic compounds by a
coefficient.
_C3_H8
+
O2
CO2
H2O
Answer: the answer is b
Explanation:
Answer:
Explanation:
B answer
The part of the atom that is free to move between materials is???
Answer:
Electrons
Explanation:
The boiling point of water is elevated when 125 g of ethylene glycol (C₂H₆O₂) is dissolved in 1200 g of water. What is the new boiling point of water? Kb for water is 0.52 C°/m.
Answer:
100.87°C
Explanation:
This is about elevation of boiling point, one of the colligative properties.
Formula is:
Boiling T° of solution - Boiling T° of pure solvent = Kb . m . i
Kb is the boiling constant.
m means molality (mol/kg of solvent)
i = numbers of ions dissolved.
Our solute is C₂H₆O₂. As it is an organic compound, no ion is generated, so i = 1.
We determine moles of solute: 125 g . 1mol /62g = 2.02 moles.
We determine molality = 2.02 mol / 1.2 kg → 1.68 m.
Boiling T° of solution - 100°C = 0.52°C/m . 1.68m . 1
Boiling T° of solution = 0.52°C/m . 1.68m . 1 + 100°C → 100.87 °C
What is the new volume if a piston starts at 25ml and 900 mm Hg and the pressure decreases to 750 mm Hg?
What is the starting pressure if an inner tube starts at 40L and then the volume decreases to 30L after the pressure is increased to 20 psi
What is the starting temperature if a balloon increases from 50ml to 70ml and the final temperature was 350K?
If a bubble cools from 300K to 200K and the final volume is 18ml, what volume did it start at?
Answer:
I screenshot and expained here
https://screenshot.best/A7QIKV.lnk
Explanation:
Name three organelles and explain the function of each.
this is more science
giving 15 points
Using the periodic table determine the number of neutrons in 16O
We often denote oxygen as 16O8 where 16 is the mass number and 8 is the atomic number.
number of neutrons=16-8=8
borildls03
36. Two metallic ions commonly present in hard water
a.catwo metallic ions commonly present in hard water
Answer:
Mg2+ and Ca2+
Explanation:
Hard water are water that happen to contain salts of calcium and magnesium ions. They can occur as chlorides, sulphates, bicarbonates etc. Hard water wastes soap as it requires an above normal amount to form lathers.
The metallic ions are;
Mg2+ and Ca2+
Saline is a 0,154 M NaCl solution.
If the mass of NaCl is used to prepare saline solution was 45,045 grams, find the volume of solution that was obtained.
(Na:23; Cl:35,5)
Answer: The volume of solution is 200 ml
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
[tex]Molarity=\frac{n\times 1000}{V_s}[/tex]
where,
n = moles of solute
[tex]V_s[/tex] = volume of solution in ml
moles of [tex]NaCl[/tex] = [tex]\frac{\text {given mass}}{\text {Molar mass}}=\frac{45.045g}{58.5g/mol}=0.77mol[/tex]
Now put all the given values in the formula of molality, we get
[tex]0.154=\frac{0.77\times 1000}{V_s}[/tex]
[tex]V_s=\frac{0.154\times 1000}{0.77}=200ml[/tex]
Therefore, the volume of solution is 200 ml
How many moles of sodium are required in order to produce 5 moles of
sodium chloride?
Answer:
5 moles of Sodium are required to produce 5 moles of Sodium Chloride.
Explanation:
I am assuming you were not given an equation and this is a synthesis reaction.
Let's begin by writing a balanced chemical equation for the synthesis of sodium chloride.
2Na⁺ + Cl₂⁻ -> 2NaCl
Since Cl₂ exists as a diatomic molecule, we must have 2 +1 charges from Na to balance out the 2 -1 charges of Cl₂ (-1 for each Cl atom). This will then form 2 moles of NaCl.
To produce 5 moles of sodium chloride, we can multiply the entire equation by 2.5. This will result in:
5Na⁺ + 2.5Cl₂⁻ -> 5NaCl
The stoichiometric ratios of this new equation is:
5 Na: 2.5 Cl₂: 5NaCl
5 moles of sodium (Na) are required to produce 5 moles of sodium chloride (NaCl).
Calculate the energy of interaction between a lithium ion and a magnesium ion at a distance of 4.55x10^-10 m
Which of the following causes rocks to break down into smaller pieces?
A. Weather
B. water
C. time
D. all of the above
How many kinds of horses are there in the world? Give me a real number, plz its for a magazine article!
Answer:
784
Explanation:
Answer:
784 horse breeds
What is the chemical equation of a covalent bond
Answer:
In my knowledge of chemistry, I believe there isn't chemical equation for covalent bond. There is only covalent formula
Explanation:
If 5 moles of nitrogen are used how many moles NH3(g) are produced
Answer:
I hope this will help you....and please mark me as Brilliant
Explanation:
1 moles N2 you can produce 2 moles of NH3, (see equation)
5 mol N2 gives 10 mole NH3
molar mass of NH3 = 17.03 g/mole
10 moles NH3 is 10 * 17.03 gram = 170.3 gram NH3.
Balanced equation:
N2(g) + 3 H2(g) → 2 NH3(g)
Write a Balanced Equation
H2 + Cl2 --> __HCl
Answer:
2HCL
Explanation:
Both the elements have 2 so when placing the 2 infront ,it'll distribute/ apply to both
How do you study things you cannot see
Answer:
For things that we can not directly observe, we can use indirect observation – which studies the consequences of an action or process. For example, we cannot see the Earth's magnetic field, but we detect it by its effect on a compass.
Florida's 'Space Coast" was promoted by Cape Canaveral and surrounding communities as an attractive tourist destination.
What evidence BEST supports this statement?
A)
A NASA-themed amusement park was built next to Kennedy Space Center.
B)
Space-themed motels and restaurants were built around Cape Canaveral.
C)
Certified NASA astronauts were hired to give tours around Cape Canaveral.
D)
Florida's largest international airport was built near Kennedy Space Center,
Answer:
D! :)
Explanation:
What do waves carry from place to place?
A Energy, but not matter
B Energy and matter
C Matter, but not energy
D
Nelther energy nor matter
In context to the question after evaluating every possible fact we conclude that waves carry energy and never carry matter, towards a dignified place to another.
This is considered true concerning all types of waves involving the sound waves, water waves, light waves, radio waves, microwaves, and x-rays. Then the correct answer for the required question is Option A.
Furthermore, there are different and distinguished types of waves. For instance
Mechanical waves: These comprises of waves that require a medium to complete the given course. Instances involve sound waves and water waves.Electromagnetic waves: These consist of wave’s generally don’t require a medium to complete a course . Instances include radio waves, microwaves, and light waves.Matter waves: These involve waves that are associated with particles such as electrons and atoms.To learn more about mechanical waves
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Explain how the patterns of differences between a physical and chemical change are explained by changes at the scale of atoms and molecules (interacting differently, rearranging, etc?)
Answer:
A chemical change is a permanent change. A Physical change affects only physical properties i.e. shape, size, etc. ... Some examples of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc.
Explanation:
Consider the atomic model of the element chlorine. Which elements will bond ionically with chlorine such that the formula would
be written as XCL2?
-0
A)Hydrogen
B)Magnesium
C)Oxygen and Sulfur
D)Lithium and Sodium
E)Barium and Calcium
Answer:
it is magnesium and barium and calcium
Magnesium, Barium, and Calcium will bond ionically with chlorine such that the formula would be written as MgCl₂, BaCl₂, and CaCl₂.
What are ionic compounds?Ionic compounds can be explained as crystalline solids which are formed by packing of opposite charge ions due to the interactions of the ions. An Ionic compound is produced when metal reacts with non-metal.
In ionic compounds, oppositely charged ions are held by ionic bonds due to the interactions between ions. The ions are formed from atoms by gaining or losing electrons in order to attain their noble gas configuration.
A cation in ionic compounds is the electropositive ion and has the tendency to give away valence electrons. Similarly, anions in ionic compounds are electronegative ions and have a tendency to gain electrons.
The chlorine needs one electron to complete its valence shell. Therefore two chlorine will combine with a divalent cation. Therefore Magnesium, Barium, and Calcium exist as Mg⁺², Ba²⁺ , and Ca²⁺.
Learn more about ionic compounds, here:
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Why is it not advisable to light a charcoal stove in limited supply of oxygen.
Answer:
Due to the limited supply of oxygen, carbon (ii) oxide, a poisonous gas, is produced instead of carbon(iv) from the burning charcoal stove and this may result in death when inhaled.
Explanation:
When charcoal is burnt in a plentiful supply of oxygen, the combustion products is carbon (iv) oxide (carbon dioxide) which is not very toxic to the human body. The equation of the reaction is given below:
C + O₂ ----> CO₂
However, in a limited supply of oxygen gas, the combustion product is carbon (ii) oxide. The equation of the reaction is given below:
2C + O₂ ----> 2CO
Carbon (ii) oxide is a colorless and odorless gas which unlike carbon (iv) oxide is very toxic to human and results in fatality when inhaled in even small doses for a few minutes. Its mechanism of action of toxicity is that it competes with oxygen for transport in the body by hemoglobin. It combines irreversibly with hemoglobin to form carboxyhemoglobin, thereby depriving tissues and cells the oxygen they need. This results in death of the cells and tissues as well as of the whole organism. Thus, it is not advisable to light a charcoal stove in limited supply of oxygen.
Ice cream
Air, Cone:
Heat is :
the system
The kinetic energy is
The potential energy is
:: Surroundings
:: System
.: Entering
:: Exiting
.: Increasing
:: Decreasing
Answer:
icecream-decreasing
air,cone-surounding
heat is -entering-the system
the potential energy-increasing
Which is the correct molar mass for the
compound aluminum carbonate, Al2(CO3)3?
Answer:
molar mass for the
compound aluminum carbonate, Al2(CO3)3
233.99 g/mol
Which of the following substances is a base?
5 points
a. Vinegar
b. Ammonia
c. Lemon juice
d. Distilled water
Answer:
D
Explanation:
water is used to delude just about anything
if a:b =2:3and b:c=6:10,find a:c.
Answer:
4:10
Explanation:
a:b
2:3
6:10
b:c
The common ratio is b
The lcm of 3 and 6 is 6.
Multiply the first ratio by 2 and the second one by 1
a:b:c
4:6:10
hence a:c = 4:10
Kayla learned that when you play with the Soccket for 30 minutes it gives you 3 hours of light. She thinks that rolling the ball slowly with her baby brother for 30 minutes will give her the same amount of energy as kicking it in a game of soccer for 30 minutes. Do you agree or disagree? State your claim and use evidence from what you've learned about speed and energy to explain your answer.
Answer:
disagree it wont be the same momentum
Explanation:
cuh