Answer:
See Explanation
Explanation:
Let us find the number of moles of each element
For iron = 2.24g/56 = 0.04 moles
For oxygen = 0.96 g/16 = 0.06 moles
Then we divide by the lowest ratio;
0.04/0.04 and 0.06/0.04
1 and 2
We Thus obtain 1 : 1.5
Multiplying through by 2 we have; 2 : 3
The formula of the oxide formed is Fe2O3
The balanced equation is;
4Fe + 3O2 ------> 2Fe2O3
What causes water closest to the moon to form a tidal bulge?
A)revolution
B)friction
C)seasons
D)gravity
Answer:
gravity
Explanation:
gravity effects earth's seas and its currents
Copper metal is placed in a solution of silver nitrate. Write out the net ionic of the net equation for the reaction that occurs.
Answer:
[tex]Cu(s)+2Ag^+(aq)\rightarrow Cu^{2+}(aq)+2Ag(s)[/tex]
Explanation:
Hello there!
In this case, according to the given description of the reaction whereby copper metal reaction a solution of silver nitrate; it turns out possible for us to write out the resulting net ionic equation by firstly write the complete molecular equation:
[tex]Cu(s)+2AgNO_3(aq)\rightarrow Cu(NO_3)_2(aq)+2Ag(s)[/tex]
Now, we write the complete ionic equation, by taking into account that just the aqueous species are ionized:
[tex]Cu(s)+2Ag^+(aq)+2(NO_3)^-(aq)\rightarrow Cu^{2+}(aq)+2(NO_3)(aq)+2Ag(s)[/tex]
And finally, we cancel out the nitrate ions as the spectator ones in order to obtain:
[tex]Cu(s)+2Ag^+(aq)\rightarrow Cu^{2+}(aq)+2Ag(s)[/tex]
Regards!
The gas in a balloon has a volume of 2 Lat a temperature of 301 K. What will be the final temperature (in K) when the volume expands to
8.5 L?
Answer:
Final temperature = 1279.25 K
Explanation:
We can solve this using the formula for Charles law since we are given volume and temperature.
From Charles law, we know that;
V1/T1 = V2/T2
Where;
T1 is the initial temperature
V1 is the initial volume
T2 is the final temperature
V2 is the final volume
We are given;
V1 = 2 L
T1 = 301 K
V2 = 8.5 L
Thus, making T2 the subject, we have;
T2 = V2•T1/V1
Plugging in the relevant values;
T2 = 8.5 × 301/2
T2 = 1279.25 K
Which chemical equation represents a synthesis reaction?A.HCl + LiOH → LiCl + H2OB.2Na + MgCl2 → 2NaCl + Mg.H2CO3 → H2O + CO2D.C + O2 → CO2
Answer:
H20 +CO2 >H2CO3
Explanation:
Please don't report me just want to help and if this helped please leave a heart.
The chemical reaction that represents a synthesis reaction is C +O2 → CO2.
What is a synthesis reaction?A synthesis reaction is a type of chemical reaction in which new compounds or substance are formed from the interaction of two elements.
It is the formation of new substances or products.
Therefore, The chemical reaction that represents a synthesis reaction is C +O2 → CO2.
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What is the mass of an electron? Please help
Answer:
9.10938356 × 10-31 kilograms
Explanation:
lightest stable subatomic particle known. It carries a negative charge of 1.602176634 × 10−19 coulomb, which is considered the basic unit of electric charge. The rest mass of the electron is 9.1093837015 × 10−31 kg, which is only 1/1,836the mass of a proton.
Answer: Hope This Helps
Explanation:
Here's just some additional information: Electron Mass In physics, the electron mass or mass of electron or electron rest mass one of the fundamental constants and is defined as the mass of a stationary electron. Denoted by m e. The value of electron mass is also known as the invariant mass of an electron
(Also, the screenshot is the answer. Also, can i have brainliest so i can go to next rank! Thanks and have a blessed day!)
When agno3 was added to test tube d it reacted with cl to form agcl precipitate. Did this result in a shift to the right or the left
Answer:
Reaction will move rightwards.
Explanation:
Hello there!
In this case, according to the proposed question, it turns out possible for us to figure out the effect of the addition of silver nitrate, by using the following representative equation for the formation of the silver chloride precipitate:
[tex]Ag^+(aq)+Cl^-(aq)\rightleftharpoons AgCl(s)[/tex]
Now, due to the addition of silver nitrate, we will be actually adding silver ions to the solution, which means that, in terms of the Le Ch atelier's principle, the reaction will shift to the right towards the formation of more silver chloride precipitate.
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how are the earth and moon alike
Answer:
they both revolve or rotate around something
Explanation:
The earth revolves around the sun and the moon rotates around the earth.
how many moles are in 52 grams of o2
Answer:
1.625 moles
Explanation:
mole=mass/molar mass
mole= 52/25
In a chemical reaction, one of the chemical reactants is present in______ to make sure that the limiting reagent is completely consumed.
Answer: excess
Explanation: i guesses and got the answer right
N2 + 3H2 3H2 -> 2NH3
A H = -92.2 kJ
During the above reaction, energy is -
A) absorbed
B) created
C) destroyed
D) released
Given that the enthalpy change ΔH for the reaction is negative, energy is released during the reaction (Option D)
Data obtained from the questionEquation: N₂ + 3H₂ —> 2NH₃Enthalpy change (ΔH) = –92.2 KNature of energy=?How to determine the nature of the energyFrom the data given above, we can see that the enthalpy change (ΔH) for the reaction is negative.
This simple means that heat energy is lost to the environment.
Therefore, we can conclude that the during the reaction, energy is released (Option D)
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Explain the volume of ideal gasses as related to the molar concept.
Answer:
n = Initial volume/22.4L
Explanation:
The molar concept is simply one that is used to find the Number of moles and explain the relationship it has with avogadro's number, molecular mass, molar mass e.t.c.
Now, in terms of molar mass, number of moles is given by the formula;
n = mass of the sample/molar mass
In terms of avogadro's number, number of moles is;
1 mole = avogadro's number = 6.02 × 10^(23)
Now, when dealing with ideal gases, the molar volume of an ideal gas is 22.4 L.
Now the relationship between this volume and the mole concept is that the number of moles is gotten by dividing the initial volume by this molar volume.
Thus;
n = Initial volume/22.4L
Describe how the calcium atom and the oxygen atom forms calcium oxide
You should give the charge on each ion formed
Answer:
Calcium atom has two valency electrons in its outermost energy level and these participate in bonding with the two of the six valency electrons in the outermost energy level of oxygen atom.
Calcium loses these two electrons and it gains a charge of +2 while Oxygen atom gains these two electrons and gains a charge of -2 hence gains stability
[tex]Ca {}^{2 + } \: \: and \: \: O {}^{2 - } [/tex]
As a result, Calcium oxide is formed due to ionic or electro valent bonding.
[tex]CaO[/tex]
Explain the greenhouse gas effect
Parrotfish live in the ocean and eat plantlike organisms called algae. Sunlight is shining on the
fish and the algae. Is carbon moving into the living things, moving out of the living things, or
both?
Answer:
Carbon is moving into living things (Parrotfish eating), and (I assume) Carbon is moving out of their body after they finish digesting.
This is what happens in nature, but I suspect the answer is moving into living things
Explanation:
What is one thing people can do to protect biodiversity?
Can the ratio of hydrogen to oxygen change if a solute is dissolved in the water
Answer:
Water molecules feature the combinations of hydrogen and oxygen atoms in a 2:1 ratio. Since they are present in a fixed ratio of mass, water molecules obey the law of constant proportions. Water is formed when two molecules of the diatomic hydrogen gas, combine with one molecule of the diatomic oxygen gas to produce two molecules of water
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Compare and contrast the inner and outer planets.
Answer:
The four inner planets have slower orbits, slower spin, no rings, and they are made of rock and metal. The four outer planets have faster orbits and spins, a composition of gases and liquids, numerous moons, and rings. The outer planets are made of hydrogen and helium, so they are called gas giants. Cool stuff right?
Explanation:
Population doubles in ever decreasing time periods, especially since 1850. What is responsible for this trend?
The use of fossil fuels for electricity.
The larger the population the larger the increase.
Humans eliminated or controlled all their natural predators.
Answer: The larger the population the larger the increase.
Explanation:
After the agricultural explosion of the 18th and 19th centuries, the human population grew exponentially. The thing about exponential growth is that the larger the population that is increasing, the larger the increase.
As more children were born, these children gave birth to even more children which ensured that human population doubled in little time. For instance, two people give birth to 2 children who then give birth to 2 children each - we now have 8 people. Compare this to two people giving birth to 5 children who then give birth to 4 children each.
The latter became the norm after 1850 and is why the population kept growing faster.
Answer:
Its A^^
Explanation:
witch one is bigger 25yd or 75ft
Answer: in 25 yards there is 75 feet. Witch is the same to say that 25 yards is 75 feet.
Explanation:
Answer:
25yd is bigger
Explanation:
there are 4 wavelengths that are emitted from a hydrogen atom that can be seen by the human eye. Two of the wavelengths are the same color. what color are they?
a) red, blue, and violet
b) orange, yellow, and green
C) red, orange, and yellow
D) blue, indigo, and violet
Answer:
The correct answer is - a) red, blue and violet.
Explanation:
In the visible spectrum, the hydrogen atom emits four different wavelengths that are visible to the human eye. The four wavelengths are these lines are 656 nm, 486 nm, 434 and 410 nm. Shorter wavelengths are not visible to human eyes fall in ultravoilet lights at less than 400 nm.
The H-α line is the red color wavelength at 656 nm, the blue color has two different wavelengths that are 486 nm sometimes called cyan, and 434 nm, and violet at 410 nm.
GIVE ME BRAINLIEST!!!!
nah im jk lol
ANYWAY HAVE A GREAT DAY!
Answer:
okie then you too
which of the following best describes a neutron? A. It is located in the electron cloud and has a negative charge. B. It is located in the electron cloud and has no charge. C. It is located in the nucleus and has no charge. D. It is located in the nucleus and has no positive charge.
C. It is located in the nucleus and has no charge
Explanation:
here ya go :)
2. What volume of a 1.60 mol/L stock solution of calcium chloride would you use to make a 530 mL of a
0.34 mol/L solution? (2 marks)
Answer:
112.625 mL
Explanation:
Applying,
ML = M'L'.................... Equation 1
Where M = Initial molarity or concentration of calcium chloride, L = initial volume of calcium chloride, M' = Final molarity of calcuim chloride, L' = Final volume of calcuim chloride.
make L the subeject of the equation
L = M'L'/M................ Equation 2
From the question,
Given: M = 1.60 mol/L, M' = 0.34 mol/L, L' = 530 mL
Substitute these values into equation 2
L = (0.34×530)/1.60
L = 112.625 mL
How do chemical bonds form between the atoms in a molecular compound
There are two types of chemical compound one is covalent compound and other is ionic compound. Therefore, ionic bond is formed by complete transfer of electron and covalent bond is formed by partial sharing of electron.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
An ionic compound is a metal and nonmetal combined compound. Ionic bonds are formed by complete transfer of electron from one element to another element. Covalent compound are formed by elements whose electronegativity difference is very low. Covalent bond is formed by sharing of electron.
Therefore, ionic bond is formed by complete transfer of electron and covalent bond is formed by partial sharing of electron.
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Which functional group is shown below?
cd
R
O-R
A. Amino
B. Hydroxy!
C. Ether
D. Ester
Ester functional group is the given image. Therefore, the correct option is option D among all the given options.
What is functional group?A functional group in organic chemistry is a substituent and moiety inside a molecule that triggers the molecule's distinctive chemical processes. No matter how the rest of a molecule is made up, the very same functional group would experience the same or a similar set of chemical events.
This permits the planning of chemical synthesis as well as the methodical prediction of chemical changes and the behavior of chemical molecules. Other functional groups close by can affect a functional group's reactivity. Retrosynthetic analysis can be used to design organic synthesis by using functional group interconversion. Ester functional group is the given image.
Therefore, the correct option is option D.
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Answer: D. Ester
Explanation:
Help me, I’m failing chem
What is the hydronium ion concentration of a pH of 3.4?
a. 5.0 x 10^-4 M
b. 4.0 x 10^-4 M
c. 2.5 x 10^-3 M
d. 1.0 x 10^-7 M
Answer:
b
Explanation:
[H3O+] = 10-pH = 10-3.4 ≅ 3.981 x 10^-4 moles/liter
What is the subscript in this compound?
4CO2
2
C
0
Answer:
Be(HCO3)2. 1 atom of beryllium. 2 atoms of hydrogen. 2 atoms of carbon. 6 atoms of oxygen. 11 total atoms. Pull compound up. subscript. Chemical formula.
Explanation:
2 is the subscript in this compound 4CO₂. Therefore, option A is correct.
What is subscript ?The numbers in the chemical formula that appear as subscripts represent the number of atoms of the element immediately preceding the subscript. If no subscript appears, there is only one atom of that element present.
Subscripts indicate the elemental ratio of a compound. To write the formula for an ionic compound, start with the positive ion symbol and then move on to the negative ion symbol. Subscripts that are required to balance the charges are added.
The chemical formula specifies the proportions in which elements are bonded. Two oxygen atoms, for example, combine with one carbon atom to form carbon dioxide. As a result, the subscript 2 in CO₂, CO₂ denotes the proportion of oxygen that combines with carbon.
Thus, option A is correct.
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Here is number 1 thank you again
Answer: i believe the answer is stayed the same
I hope u get this right
Cells need energy to function, but also need to be able to heal and grow for a person to be healthy. Which of the following describes how cells grow
A. Glucose molecules are put back together to form starch molecules for growth
B. oxygen molecules recombine to allow cells to get larger
C Amino Acid molecules are put back together in cells to make protein molecules for growth.
C Amino Acid molecules are put back together in cells to make protein molecules for growth.
- Because to repair or make new cell the nutrients require is protien and 50 % of your dry body is nothing but protien.
Calculation of the number of grams of salt and water of 10 grams of eye drops, if the weight of the salt in the solution is 0,25%
Answer:
See Explanation
Explanation:
Let the mass of salt be x
Let the mass of solution be 10 g
Percentage by mass of salt = 0,25%
So;
Percent concentration of salt = mass of salt/mass of solution * 100
0.25 = x/10 * 100
0.25 * 10/100 = x
x= 0.025 g of salt
Let the mass of water be y
Since mass of solution = mass of salt + mass of water
10 g = 0.025 g + y
y = 10 g - 0.025 g
y = 9.975 g