Answers
Answer:
A. 4Ni(s) + 3O2(g) —> 2Ni2O3(s)
B. Synthesis reaction.
C. 18.31g of O2
Explanation:
A. The equation for the reaction.
Ni(s) + O2(g) —> Ni2O3(s)
The above equation can be balance as follow:
There are 2 atoms of O on the left side and 3 atoms on the right side. It can be balance by putting 2 in front Ni2O3 and 3 in front of O2 as shown below:
Ni(s) + 3O2(g) —> 2Ni2O3(s)
There are 4 atoms of Ni on the right side and 1 atom on the left it can be balance by putting 4 in front of Ni as shown below:
4Ni(s) + 3O2(g) —> 2Ni2O3(s)
Now the equation is balanced
B. From the equation, we can see that two reactants combined to form a single product. Therefore, the reaction is termed synthesis reaction.
C. We'll begin by calculating the mass of Ni and O2 that reacted from the balanced equation. This is illustrated below:
4Ni(s) + 3O2(g) —> 2Ni2O3(s)
Molar mass of Ni = 59g/mol
Mass of Ni from the balanced equation = 4 x 59 = 236g
Molar mass of O2 = 16x2 = 32g/mol
Mass of O2 from the balanced equation = 3 x 32 = 96g
Summary:
From the balanced equation above,
236g of Ni reacted with 96g of O2.
Now, we can obtain the mass of O2 needed to react with 45g of Ni as follow:
From the balanced equation above,
236g of Ni reacted with 96g of O2.
Therefore, 45g of Ni will react with = (45 x 96)/236 = 18.31g of O2.
Therefore, 18.31g of O2 is needed to react with 45g of Ni
Related Questions
When a system is at equilibrium, ________. When a system is at equilibrium, ________. the reverse process is spontaneous but the forward process is not the forward and the reverse processes are both spontaneous both forward and reverse processes have stopped the forward process is spontaneous but the reverse process is not the process is not spontaneous in either direction
Answers
Answer:
When a system is at equilibrium, the process is not spontaneous at either direction.
Explanation:
The process is not spontaneous at either direction , when a system is at equilibrium ΔG = 0, because -
We know that a negative ΔG indicates a forward-moving phase that is random.
We already know that a positive ΔG implies a non-spontaneous phase going forward.
Thus , here ΔG = 0, so the process is not spontaneous in either direction.
Why starch peanut doesn't dissolve in acetone
Answers
Peanut doesn't dissolve in acetone because the crosslinking structure of polystyrene can be broken down in some organic solvents such as acetone.
What is acetone?
Acetone, is described as an organic compound with the formula (CH₃)₂CO which is the simplest and smallest ketone.
Acetone is known to be colorless, highly volatile and flammable liquid with a characteristic pungent odor.
When the polystyrene peanuts are added to the acetone, they do not really dissolve in the acetone, but instead go through a process called “swelling” that allows the trapped gases to escape.
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In the process of photosynthesis, plants take in carbon dioxide (CO2) from the atmosphere and water (H2O) from the soil. Using the energy of sunlight, plants build molecules of glucose (C6H12O6) and oxygen (O2).
Select one:
a.
Plants absorb Carbon Dioxide which increases the amount of carbon in the atmosphere.
b.
Plants produce Carbon Dioxide which increases the amount of carbon in the atmosphere.
c.
Plants absorb Carbon Dioxide which reduces the amount of carbon in the atmosphere.
d.
Plants produce Carbon Dioxide which reduces the amount of carbon in the atmosphere.
Answers
Answer:
C
Explanation:
thts the right answwer im sure
Answer:
C
Explanation:
They take in carbon dioxide and make an oxygen. That's why they are encouraging people to plant. Less CO2 more oxygen
Jupiter's mass is more than _________ the mass of the other planets put together.
Answers
Answer:
2.5 times
Explanation:
Jupiter's mass is 2.5 times that of all the other planets in the Solar System combined—this is so massive that its barycenter with the Sun lies beyond the Sun's surface at 1.068 solar radii from the Sun's center.
Explanation: I’ve gotten asked this question in class before
Help me out please !!
Answers
Help me please.
This is Organic Chemistry
Answers
The condensed structural formulas as a bond-line formula are given in the attachment:
1. (CH3)2CHCH2CH3
2. CH2=C(CH2CH3)2
3. CH3CHCICH2CH(CH3)2
What is a bond-line formula?A bond-line formula, also known as a line-angle formula or skeletal formula, is a shorthand representation of a molecule in which the carbon and hydrogen atoms are implied and only the bonds between the atoms are shown.
In this representation, each vertex or endpoint of a line represents a carbon atom, and each line segment represents a bond between two adjacent atoms. The hydrogen atoms are not shown explicitly, but are assumed to be attached to the carbon atoms to satisfy the valence requirements.
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For Al its atomic number is 13 and its mass number is 27. How many neutrons does it have?
ОА
13
OB 14
OC 26
OD. 27
OE 40
Answers
What type of cell is the typical human body cell
Answers
Answer:
Red blood cells
Explanation:
An average adult human has somewhere around 25 trillion red blood cells in their body.
Answer:
Heya! Maddie here! The answer is Red Blood Cells.
Explanation:
Hope this helps!
A 3-column table with 5 rows. Column 1 is unlabeled with entries A, B, C, D, E. Column 2 is labeled Temperature in degrees Celsius with entries 2.4, 21.5, 39.6, 55.6, 71.2. Column 3 is labeled Volume in cubic centimeters with entries 5.8, 5.8, 6.7, 6.9, 7.4. A student collected the data shown above. Row may represent an error.
Answers
Since it reflects no change in volume – it is most likely that the data recorded in row B is erroneous.
How to solveIn order to pinpoint the row with a probable error, we will scrutinize the correlation between temperature and volume.
Typically, whenever there is an increase in temperature, there would be an accompanying escalation in the volume of a given substance.
Let's take a closer look at the values reflected in the table:
From A to B: Temperature rises but the volume remains stagnant.
From B to C: Both temperature and volume show an increment.
Similarly, from C to D, as well as from D to E, we see that for every rise in temperature, there is subsequently more volume illustrated.
Given the dissimilarity between rows A and B – where the former shows a temperature increase while the latter reflects no change in volume – it is most likely that the data recorded in row B is erroneous.
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Which row in the table below is likely to represent an error in the student's data collection?
Temperature (°C) Volume (cm³)
A 2.4 5.8
B 21.5 5.8
C 39.6 6.7
D 55.6 6.9
E 71.2 7.4
Answer:
A student collected the data shown above. Row
✔ B
may represent an error.
Explanation:
edge 2023
Scientists have discovered marine fossils in rock layers all over the world. The discovery is supported by the story of what in the Bible A Adam and Eve B Cain and Abel C Noah’s ark d Daniel in the lion’s den
Answers
Answer:
d. lions den
Helpful or not?
Answer: Noah’s ark
Explanation:
The flood is what killed everything
Why does CO2 have a higher boiling point than CH4 when they both possess dispersion forces?
Answers
CO₂ have a higher boiling point than CH₄ when they both possess dispersion forces because CO₂ consists of polar bonds between carbon and oxygen.
Intermolecular forces determine bulk properties, such as the melting points of solids and the boiling points of liquids.
Liquids boil when the molecules have enough thermal energy to overcome the intermolecular attractive forces that hold them together, thereby forming bubbles of vapor within the liquid.
CO₂ have a higher boiling point than CH₄ when they both possess dispersion forces because CO₂ consists of polar bonds between carbon and oxygen. The polarity increases the boiling point of the molecule.
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Question 8 of 10
Which of the following are necessary when proving that the opposite angles
of a parallelogram are congruent? Check all that apply.
A. Opposite sides are congruent.
B. Opposite sides are perpendicular.
C. Corresponding parts of similar triangles are similar.
D. Corresponding parts of congruent triangles are congruent.
Answers
The necessary conditions when proving that the opposite angles of a parallelogram are congruent are: A. Opposite sides are congruent. D. Corresponding parts of congruent triangles are congruent.
Opposite sides are congruent as this property of parallelograms is known as the opposite sides property. It states that opposite sides of a parallelogram are equal in length. By showing that the opposite sides of a given parallelogram are congruent, we can establish that the figure is indeed a parallelogram. Corresponding parts of congruent triangles are congruent, as this property is based on the concept of congruent triangles. If we can prove that two triangles within a parallelogram are congruent, then the corresponding parts of those triangles, including angles, will also be congruent.
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The concentration of urea in a solution prepared by dissolving 16 g of urea in 20 g of H2OH2O is ________% by mass. The molar mass of urea is 60.0 g/mol. The concentration of urea in a solution prepared by dissolving 16 g of urea in 20 g of is ________% by mass. The molar mass of urea is 60.0 g/mol. 44 80 0.80 0.48 0.44
Answers
Answer:
44
Explanation:
Given that :
Mass of solute = Mass of urea = 16g
Mass of water = 20g
Mass of solution = (mass of solute + mass of solvent) = (mass of urea + mass of water) = (16g + 20g) = 36g
Percentage Mass = (mass of solute / mass of solution) * 100%
Percentage Mass = (16 / 36) * 100%
Percentage Mass = 0.4444444 x 100%
Percentage Mass = 44.44%
Percentage Mass = 44%
Goot is conducting an experiment to see whether goldfish eat more flakes or pellets. He thinks that the fish will choose the flakes. Every day, Gooft places both flakes and pellets in a fish tank and observes which food the fish
choose what evidence would be best for Geoff to collect as he observes the fish?
umber of fish in the tank
the time takes for the fish to finish eating
the number of th that cat cach type of food
the time to for the fish to choose what type of food to eat
Answers
Answer The number of fish that eat each type of food
Explanation:
Answer:
the number of th that cat cach type of food
Explanation:
cuz im big brain
A sample of 240.0 K and 670 mm Hg occupies a 128 mL volume bottle. What volume will the gas occupy at -75 degrees celsius (If the pressure remains constant)?
Answers
Answer:
New volume = 105.6 mL
Explanation:
Given that,
Temperature, T = 240.0 K
Pressure, P = 670 mm Hg
Volume, V = 128 mL
New temperature = -75°C = 198 K
We need to find the new volume. Let it is V'. The relation between volume and the temperature is given by :
\(V=kT\\\\\dfrac{V}{V'}=\dfrac{T}{T'}\\\\V'=\dfrac{VT'}{T}\\\\V'=\dfrac{128\times 198}{240}\\\\V'=105.6\ mL\)
So, the new volume is equal to 105.6 mL.
What is a phase diagram?
Answers
Which of the following would be a clue that a rock is metamorphic?
A It has a complete fossil in it.
B It has gas bubbles.
с It is very soft.
D It has ribbon-like layers, or bands.
Answers
Which organelles is found in plant and animal cells and is involved in making cellular energy?
Answers
Answer:
The plant and animal cells are eukaryotic and contain well developed cellular organelles.
The cell membrane, cytoplasm, chromosomes, and mitochondria are the structures that are present in both the plant and the animal cells.
The cell wall and chloroplast are present only in the plant cell.
Mitochondria
Because it is right next to the nucleau
what is the density of if mass equals 4.98 volume is 5
Answers
Answer:
4.98/5 = 0.996 (don't forget to add your units)
Explanation:
Density= Mass/Volume
If your mass is 4.98_ (units of measurement are missing ) and your volume is 5 (units of measurement are missing) You plug the numbers into the equation:4.98/5= 0.996 (don't forget to add your units)
Can you explain dynamic equilibrium and show a graph with it please thank you
Answers
We have a simple reaction that is at equilibrium.
A <-----> B
In chemistry, the dynamic equilibrium between a forward reaction (from left to right or A ---> B) and the reverse reaction (from right to left or B ---> A) is a chemical equilibrium where the rate of the two reactions are equal. That means that the forward and the reverse reaction are happening at the same "speed".
When we reach the equilibrium the ratio between the concentration of products and reactants remains constant over time.
A -----> B
We are at equilibrium and we have 5 molecules of A and 5 molecules of B. In the dynamic equilibrium that we were working, at the same time that two molecules of A are reacting to become B, two molecules of B are reacting to become A and mantain the equilibrium.
Which chemical species is responsible for the peaks near each wavelengths, 480 \pu{nm}nm and 430 \pu{nm}nm, respectively
Answers
The species that are responsible for the peaks near the wavelength are allura red and tartrazine.
What is a wavelength?It should be noted that wavelength simply means the distance between the identical points in the adjacent cycles of a waveform.
In this case, the chemical species is responsible for the peaks near each wavelengths include allura red and tartrazine.
It should be noted that allura red is used as a food dye and supplied as red sodium salt. Also, tartrazine is used as a food coloring agent.
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kAnswer:
Explanation:
a. Analysis of the potassium ion content in a food sample yielded the following data: % K: 3.09, 4, 2.775, 2.5, 3.80 Calculate the standard deviation of the sample. Show all calculations and indicate the answer to the correct amount of significant figures.
Answers
The standard deviation of the sample is 0.579, rounded to the correct number of significant figures.
To calculate the standard deviation of the sample, we need to follow these steps:
Calculate the mean (average) of the data set.To find the mean, we sum up all the data points and divide by the number of data points. Let's calculate it:
(3.09 + 4 + 2.775 + 2.5 + 3.80) / 5 = 16.165 / 5 = 3.233
Subtract the mean from each data point.To do this, we subtract the mean (3.233) from each data point and square the result:
(3.09 - 3.233)^2 = 0.020049
(4 - 3.233)^2 = 0.586489
(2.775 - 3.233)^2 = 0.209025
(2.5 - 3.233)^2 = 0.537289
(3.80 - 3.233)^2 = 0.323329
Calculate the variance.To find the variance, we sum up the squared differences from step 2 and divide by the number of data points:
(0.020049 + 0.586489 + 0.209025 + 0.537289 + 0.323329) / 5 = 1.676181 / 5 = 0.3352362
Take the square root of the variance to get the standard deviation.√0.3352362 = 0.579 (rounded to three significant figures)
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What is Electron Configuration?
Answers
Electron configuration refers to the distribution of electrons in atoms and molecules.
Electron configuration can be defined as the specific arrangement of negatively charged electrons in different energy levels around atomic nuclei.Electron configuration can also be used to represent the bonds that connect different atoms in a molecule.Moreover, an electron orbital refers to the function that describes the location and behavior of electrons in a given atom.In conclusion, electron configuration refers to the distribution of electrons in atoms and molecules.
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Answer:
In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals.
In the winter, a heated home in the Northeast might be maintained at a temperature of 67 °F. What is this
temperature on the Celsius and Kelvin scales?
(Round your answer to the nearest whole number.)
°C
K
Answers
Kelvin: 292.59
pls help ive only found the answers for “from yellow to blue”
Answers
Answer:
C. and D.
Explanation:
As the problem states, a solution containing bromothymol blue would turn from blue into yellow whenever CO₂ gas is added to it.
When a person exhales, their breath contains CO₂. Thus blowing air into the solution through a straw would add CO₂ to the solutionYeast cells react with sugar and water and produce alcohol, CO₂ and energy; thus turning the solution yellow.The first ionization energy of mercury is 1006 kJ/mol. The energy change for the reaction Hg(l) →Hg+(g) + e– is therefore
Answers
For the first ionization energy of mercury is 1006 kJ/mol. The energy change for the reaction is mathematically given as
dH = 1006KJ/mol
What is the energy change for the reaction?The amount of energy required to remove an electron from a neutral atom is called ionization energy. from the question, the electron is removed from the neutral atom Hg to give the first ionization energy
Hg→Hg +e
therefore the energy change for the reaction is
dH = 1006KJ/mol
In conclusion, the energy change for the reaction is
dH = 1006KJ/mol
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Please help!
Which atoms represent different isotopes of the same element? Picture included
Answers
"Option C" O¹⁵8 and O¹⁶8 atoms represent different isotopes of the same element.
Hope it helps...
how many sodium ions are in 1.4 kg of sodium chloride, NaCl?
Answers
Answer:
1.44 x 10²⁵ ions of Na⁺
Explanation:
Given parameters:
Mass of NaCl = 1.4kg = 1400g
Unknown:
Number of ions of sodium = ?
Solution:
The compound NaCl in ionic form can be written as;
NaCl → Na⁺ + Cl⁻
In 1 mole of NaCl we have 1 mole of sodium ions
Now, let us find the number of moles in NaCl;
Number of moles = \(\frac{mass}{molar mass}\)
Molar mass of NaCl = 23 + 35.5 = 58.5g/mol
Number of moles = \(\frac{1400}{58.5}\) = 23.93mol
So;
Since 1 mole of NaCl gives 1 mole of Na⁺
In 23.93 mole of NaCl will give 23.93 mole of Na⁺
1 mole of a substance = 6.02 x 10²³ ions of a substance
23.93 mole of a substance = 6.02 x 10²³ x 23.93
= 1.44 x 10²⁵ ions of Na⁺
C6H12O6 + 602 → 6CO2 + 6H₂O
The most efficient ratio is
1 C6H12O6 6 02.
Which set of reactants will be the most
efficient (least wasteful of materials) for
the reaction?
A. 1.0 mol C6H12O6 and 3.0 mol O₂
B. 1.5 mol C6H₁2O6 and 3.0 mol O₂
C. 3.0 mol C6H₁2O6 and 6.0 mol O₂
D. 0.5 mol C6H₁2O6 and 3.0 mol O₂
Answers
Answer:
D
Explanation:
The ratio of C6H12O6 (which will be referred to as "the carb") to oxygen is 1 to 6, so if we find an answer which has the same ratio, it should be chosen. A is 1:3
B is even worse with a ratio of the carb to oxygen of 1:2
C is the same as B, 1:2
D has a ratio of the carb to oxygen of 1:6, which is what we are looking for.
QUESTION 2
An unknown compound (Compound Nomocorona) was determined to have a solubility of 30.0 in 100.0
mL of pure water at room temperature. When 30.0 grams of the compound were dissolved in 100.0 mL of
pure water, the final volume of the solution was 106.4 mL of solution. What is the m/v % concentration of
Nomocorona in the saturated solution with water?
Answers
The mass per volume concentration is obtained as 30%.
What is the m/v concentration?We know that the concentration has to do with the amount of substance that can be found in the solution. In this case, the concentration here has been expressed as the mass per volume concentration.
If 30 g of the solid dissolves in 100 mL of the water
x g dissolves in 106.4 mL of the solution
x = 30 * 106.4/100
x = 31.92 g
The mass per volume concentration now becomes;
31.92 g/106.4 mL * 100/1
= 30%
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