Option B is correct option.
The half-reaction 2MnO2 + H2O + 2e- Mn2O3 is missing OH- ions.
Explanation:
Full equation:
2MnO2 + H2O + 2e- → Mn2O3 + 2OH-
Part 2:The option B which is Mg is stronger reducing agent than Ag is correct option.
Explanation:
Equation:
Mg(s) + 2Ag+ (aq) → Mg2+ (aq) + 2Ag(s)
According to equation Mg converts to Mg+2 which means it gives to electron to reduce Ag. So it act as an reducing agent.
Part 3:The correct option is B. Which is 5, 1, 8, 5, 1, 4.
Explanation:
Full equation :
5 Fe²⁺ (aq) + MnO₄⁻ (aq) + 8 H⁺ (aq) --> 5 Fe³⁺ (aq) + Mn²⁺ (aq) + 4 H₂O (l)
The study of chemicals and bonds is called chemistry. There are different types of elements and these are metals and nonmetals.
The correct answer is mentioned below.
What is oxidizing agent?An oxidizing agent, also known as an oxidant or oxidizer, is a substance that has the ability to oxidize other substances In other words to accept their electrons. Common oxidizing agents are oxygen, hydrogen peroxide, and the halogensThe answer to the first question is as follow:-
The half-reaction[tex]2MnO_2 + H_2O + 2e^- Mn_2O_3[/tex] is missing OH- ions.The full reaction is as follows:-
[tex]2MnO_2 + H_2O + 2e^- ----> Mn_2O_3 + 2OH^-[/tex]
The answer to the second question is as follow:-
Mg is a stronger reducing agent than Ag is correct
The reaction is as follows:-
[tex]Mg(s) + 2Ag+ (aq) ---> Mg2^+ (aq) + 2Ag(s)[/tex]
According to the equation Mg converts to Mg+2 which means it gives to electron to reduce Ag. So it acts as a reducing agent.
The answer to the third question is option B Which is 5, 1, 8, 5, 1, 4.
The full equation is as follows:-
[tex]5 Fe^{2+} (aq) + MnO_4^- (aq) + 8 H^+(aq) --> 5 Fe^{3+} (aq) + Mn^{2+} (aq) + 4 H_2O (l)[/tex]
Hence, the correct answer is described.
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2Na + 2H2O → 2NaOH + H2 During a laboratory experiment, a certain quantity of sodium metal reacted with water to produce sodium hydroxide and hydrogen gas. What was the initial quantity of sodium metal used if 8.40 liters of H2 gas were produced at STP?
Answer : The initial quantity of sodium metal used is 17.25 grams.
Solution : Given,
Volume of [tex]H_2[/tex] gas = 8.40 L
Molar mass of Na metal = 23 g/mole
The Net balanced chemical reaction is,
[tex]2Na+2H_2O\rightarrow 2NaOH+H_2[/tex]
At STP, 22.4 L of volume is occupied by 1 mole of [tex]H_2[/tex] gas
so, 8.40 L of volume is occupied by = [tex]\frac{8.40L\times 1mole}{22.4L}[/tex] = 0.375 moles of [tex]H_2[/tex] gas
Now from the above reaction, we conclude that
1 mole of [tex]H_2[/tex] gas produced by the 2 moles of Na metal
0.375 moles of [tex]H_2[/tex] gas produced = [tex]\frac{2moles\times 0.375mole}{1mole}=0.75moles[/tex] of Na metal
The quantity of Na metal used = Moles of Na metal × Molar mass of Na metal = 0.75 moles × 23 g/mole = 17.25 grams
Therefore, the initial quantity of sodium metal used is 17.25 grams.
Answer:
17.2
Explanation:
took the test
Lab report on physical and chemical change
Answer:
Grinding, melting, dissolving, and evaporating are all physical changes. No new substance or substances are formed as a result of a physical change. A chemical change results in the formation of one or more “new” substances. These new substances differ in chemical properties and composition from the original substance.
Explanation:
A lab report on physical and chemical change would include an understanding of the two concepts, the procedures followed in the experiment and the results obtained. Physical changes involve a change in form, not in molecular composition, while chemical changes involve a change in molecular structure leading to the formation of a new substance.
Explanation:A lab report on physical and chemical change involves first understanding these two key concepts. A physical change is a change in the form of a substance, but not in its molecular composition. Examples include changes in state, such as melting ice into water. A chemical change, on the other hand, involves a change in the substance's molecular structure, which leads to new substances being formed. For instance, when iron rusts in the presence of moisture, it forms a new substance, iron oxide.
To write the report, you'd first list the objectives of the experiment, the materials used, and the procedures followed. Data collected during the experiment should be detailed, and then results discussed and interpreted. Conclusions made should be based on the experiment's outcomes and evidence. Remember to always observe proper lab safety protocols and discuss these in your report too.
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Chemistry!! Please help
What is the solubility in mol/L of copper(I) sulfide, Cu2S? Its Ksp value is 6.1 × 10-49 .
Answer:
5.3 × 10⁻¹⁷ mol·L⁻¹
Explanation:
Let s = the molar solubility.
Cu₂S(s) ⇌ 2Cu⁺(aq) + S²⁻(aq); K_{sp} = 6.1 × 10⁻⁴⁹
E/mol·L⁻¹: 2s s
K_{sp} =[Cu⁺]²[S²⁻] = (2s)²×s = 4s^3 = 6.1 × 10⁻⁴⁹
[tex]s^{3}= \frac{6.1 \times 10^{-49}}{4} = 1.52 \times 10^{-49}[/tex]
[tex]s = \sqrt[3]{1.52 \times 10^{-49}} \text{ mol/L} = 5.3 \times 10^{-17} \text{ mol/L}[/tex]
The solubility of copper(I) sulfide, Cu2S, in water, given its Ksp value of 6.1 × 10^-49, is calculated to be approximately 1.15 × 10^-17 mol/L. by understanding the dissolution process and solving the Ksp expression.
The question asks about the solubility of copper(I) sulfide, Cu2S, given its Ksp value is 6.1 × 10^-49. To solve for the solubility in mol/L, we must first understand the dissolution process of Cu2S in water. The equation for this process is Cu2S(s) → 2 Cu+(aq) + S2-(aq). For every mole of Cu2S that dissolves, it produces 2 moles of Cu+ and 1 mole of S2-. Therefore, if the solubility of Cu2S is 's' mol/L, the concentration of Cu+ ions is 2s mol/L, and the concentration of S2- ions is s mol/L.
Substituting these values into the Ksp expression gives: Ksp = [2s]^2[s] = 4s^3. Plugging in the Ksp value of 6.1 × 10^-49 and solving for 's' provides: 4s^3 = 6.1 × 10^-49, leading to s^3 = 1.525 × 10^-49 and s ≈ 1.15 × 10^-17 mol/L. Therefore, the solubility of copper(I) sulfide, Cu2S, in water is approximately 1.15 × 10^-17 mol/L.
After reading the latest issue of Organic Compost Quarterly, Michael, Brad and Darius have decided to investigate the effect of fish sticks on plant growth. They plan on thawing fish sticks and then aging them for various lengths of time before using them as compost to promote the growth of eggplants. Because decomposition is necessary for release of nutrients, the Alexs’ hypothesized that older fish stick compost will produce taller eggplants. Michael, Brad and Darius will grow four flats of eggplants (25 plants/flat) for 5 days.
The eggplants will then be fertilized as follows:
Flat A: 450 g of 3-month-old fish stick compost
Flat B: 450 g of 6-month-old fish stick compost
Flat C: 450 g of 12-month-old fish stick compost
Flat D: 0 g of fish stick compost
The eggplants received the same amount of sunlight and water each day. At the end of 30 days the students will record the height of the plants (cm) and then throw a party featuring fish sticks.
Identify the parts of this experiment.
1.
Constant
2.
Independent variable
3.
Hypothesis
4.
Dependent variable
a.
length of time of fish stick aging
b.
growth of the eggplant
c.
5 days
d.
older fish stick compost will produce taller eggplants
A constant in any experiment is a variable that remains constant for the entire experiment, this constant helps to identify the other variables of the experiment and come to a conclusion. Here, in this experiment the number of days remains constant for the entire experiment which is 5 days as given in the options. Along with that the type of the plant, water amount, sunlight, 30 days of the whole experiment, and the number of plants remains the same for the entire experiment.
Answer 2) Independent Variable : Option a) length of time of fish stick aging.Explanation:In the experiment the independent variable is the length of the old fish sticks aging , as per the study done by the experimenters the age of the old sticks will produce more compost which will result into taller eggplants. This will be independent of other variables in the experiment, as the decomposition of the fish sticks will be increased by everyday and the quality of the compost will also increase according to it, which will also produce taller eggplants. Here, the independent variables are 3, 6, 12 months .
Answer 3) Hypothesis : Option D) older fish stick compost will produce taller eggplants Explanation:The experiment which is considered for proving the hypothesis is that older fish sticks will give good quality of compost that will result into high production of taller eggplants. This will be supported by the experimental results by different individuals.
Answer 4) Dependent Variable : Option b)Growth of the eggplant.Explanation :The growth of eggplant is the dependent variable in this experiment as it will be greatly influenced by other variables of the experiment. The variable which depends on other factors of experiment is called as the dependent variable. Here, in this case the height i.e. growth of th eggplant is the dependent variable which will be the result of other varying factors of the controlled experiment.
The gaps on Mendeleev's table _____. have never been filled in represented elements not discovered in his time are not filled in because those elements are gases are not filled in because those elements keep changing
Answer. The gaps on Mendeleev's table have never filled because those elements were not been discovered at that time.
Explanation:
Mendeleev in his periodic table arranged the elements according to their atomic masses. During this process he encountered that there are missing gaps in his periodic table for which he though , that those missing elements belonging to that particular gap were have not been discovered at that time.He was able to calculate atomic masses of those undiscovered elements and on that basis he predicted their chemical properties and position of them in his periodic table. for example : prediction of gallium's atomic mass and its relative position in his periodic table which was not been discovered at that time.Answer:
represented elements not discovered in his time
Explanation:
Is it possible for two different compounds to be made from the exact same two elements? Why or why not?
Answer: Yes it is possible for two different compounds to be made from the exact two same elements.
Reason: Oxygen(O)+Oxygen(O)=Oxygen Gas(O2)
The main function of concept mapping is:
A.Memorization incorrect answer
B.Communication incorrect answer
C.Organization incorrect answer
D.Simplification incorrect answer
The main function of concept mapping is: C. Organization
A map can be defined as a representation of all or some parts of the Earth drawn to scale on a flat surface.
In Science, there are different types of map and these include;
A political map.A thematic map.A topographic map.A special purpose map.A concept map.A concept map can be defined as a visual representation of information and ideas, so as to depict (illustrate) the relationships between two or more concepts while organizing them.
Hence, main function of concept mapping is for the proper organization or structuring of information and ideas in a graphic format.
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What is the temperature of 0.500 moles of a gas that is stored in a 2.50 L container under 13.0 atm of pressure?
Moles of a gas = 0.500
Volume = 2.50 L
Pressure = 13. atm
Temperature = ?
Solution:
Formula:
PV = n RT
Putting the values in formula:
T = PV/nR = 13 * 2.5 / 0.5 * 0.082057
= 32.5/0.041 = 792.68 K
T = 792.68 K
Which statement best explains Rutherford's experimental results?
a. Rutherford's experiment had the following results: most of the alpha particles were deflected, a few of the alpha particles were reflected, and some of the alpha particles passed through the gold foil.
b. Rutherford's experiment had the following results: a few of the alpha particles were deflected, some of the alpha particles were reflected, and most of the alpha particles passed through the gold foil.
c. Rutherford's experiment had the following results: some of the alpha particles were deflected, most of the alpha particles were reflected, and a few of the alpha particles passed through the gold foil.
d. Rutherford's experiment had the following results: some of the alpha particles were deflected, some of the alpha particles were reflected, and a few of the alpha particles passed through the gold foil.
some of the alpha particles were deflected, most of the alpha particles were reflected, and a few of the alpha particles passed through the gold foil.
Answer:
b. Rutherford's experiment had the following results: a few of the alpha particles were deflected, some of the alpha particles were reflected, and most of the alpha particles passed through the gold foil.
Explanation:
Rutherford performed a series of experiments which marked an alpha particle beam on a thin gold foil and the scattering pattern was measured using a fluorescent screen. Alpha particles were detected bouncing off the gold foil in all directions, and some back at the source.
By firing alpha particles into the foils, he observe that only a small fraction of the alpha particles deflected and most flew directly through the foil.
Most rays were deflected because they pass very close to the center with an electric charge of the same type as alpha rays; very few bounced because centers of positive charge collided head-on.
What are found on the left side or the arrow in a chemical reaction
Which of earths layers experiences the greatest pressure
The deepest, the solid iron-nickel core at the center.
Explanation:The earth layers are crust, lithosphere, mantle, outer core, and inner core. But the inner core of earth experiences the greatest pressure. This layer also has the highest temperature.
what ion is formed when an atom of magnesium (mg) loses two electrons? mg–1 mg–2 mg 1 mg 2
Answer:
Mg+2 Its D
Explanation:
DDDDDDDDDDDDDDDDDD on edge 2020
Answer:
Its D.
Explanation:
Got it correct in the question.
You are on an alien planet where the names for substances and the units of measures are very unfamiliar.
Nonetheless, you obtain 8 quibs of a substance called skvarnick in units of sleps; not quibs.
9 sleps is equal to 13 quibs.
If you have 8 quibs of skvarnick, how many sleps do you have?
Round your answer to the nearest tenth (one decimal place). Type only the number; not the number and unit
Answer: 5.5
The alien planet has unfamiliar names for substances and units of measures.
8 quibs of the substance called skwarnick has been obtained.
According to the units of measurement used in the alien planet,
13 quibs equal to 9 sleps
Therefore, 1 quib =[tex]\frac{9}{13}sleps[/tex]
Thus, 8 quibs of skvarnick = [tex]\frac{9}{13}[/tex] x 8 = 5.5 sleps.
For this reason, 8 quibs of skvarnick in units of sleps is 5.5 sleps.
While performing an experiment involving a reaction between two chemicals, the scientist observes that the reaction container has become warm. The observation is an example of:
a- qualitative data
b- quantitative data
c- both qualitative and quantitative data
d- the observation is not considered data
the answer is a- qualitative data
The correct answer is A. Qualitative data
Explanation:
In research and therefore in observation, qualitative data is the type of data that describes non-numerical information or data, for example in reactions qualitative data can be physical properties or changes in color. This is the opposite of quantitative data that focuses on numerical information such as the amount of a substance. This means observing a reaction container has become warm is an example of qualitative data because the scientist is describing qualities in reaction but not quantities or numerical information.
Write the net ionic equation including phases. Hcn(aq) + koh(aq) ---> h2o(l) + kcn(aq)
The net ionic equation for the reaction between HCN(aq) and KOH(aq) is H⁺(aq) + OH⁻(aq) → H₂O(l).
How to write the ionic equation?The net ionic equation for the reaction between HCN(aq) and KOH(aq) to produce H₂O(l) and KCN(aq), is determined as follows;
The balanced molecular equation is;
HCN(aq) + KOH(aq) → H₂O(l) + KCN(aq)
Split the ionic compounds into their constituent ions:
HCN(aq) → H⁺(aq) + CN⁻(aq)
KOH(aq) → K⁺(aq) + OH⁻(aq)
H₂O(l) remains as H₂O(l)
KCN(aq) → K⁺(aq) + CN⁻(aq)
The complete ionic equation, including all ions:
H⁺(aq) + CN⁻(aq) + K⁺(aq) + OH⁻(aq) → H₂O(l) + K⁺(aq) + CN⁻(aq)
Write the net ionic equation, excluding the spectator ions:
H⁺(aq) + OH⁻(aq) → H₂O(l)
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The net ionic equation is H⁺(aq) + OH⁻(aq) ---> H₂O(l). Net Ionic equation shows the essential reaction between the hydrogen ion and hydroxide ion, which forms water. The potassium and cyanide ions are just along for the ride!
H⁺(aq) + OH⁻(aq) ---> H₂O(l)
H⁺(aq): This is the hydrogen ion, which comes from the dissociation of hydrocyanic acid (HCN) in water. HCN is a weak acid, which means it doesn't fully dissociate in water, but it does release some hydrogen ions (H⁺).
OH⁻(aq): This is the hydroxide ion, which comes from the dissociation of potassium hydroxide (KOH) in water. KOH is a strong base, which means it fully dissociates in water, releasing hydroxide ions (OH⁻).
H₂O(l): This is the product of the reaction, which is water. When the hydrogen ion (H⁺) and hydroxide ion (OH⁻) combine, they form water (H₂O).
Spectator ions: The potassium (K⁺) and cyanide (CN⁻) ions are spectator ions, which means they don't participate in the reaction. They remain in solution, but they don't react with each other or with the hydrogen and hydroxide ions.
Here's what's happening in the reaction:
HCN (hydrocyanic acid) dissociates in water, releasing H⁺ ions: HCN(aq) → H⁺(aq) + CN⁻(aq)KOH (potassium hydroxide) dissociates in water, releasing OH⁻ ions: KOH(aq) → K⁺(aq) + OH⁻(aq)The H⁺ ions from HCN react with the OH⁻ ions from KOH to form water: H⁺(aq) + OH⁻(aq) → H₂O(l)The K⁺ and CN⁻ ions remain in solution, unaffected by the reaction.So, the net ionic equation shows the essential reaction between the hydrogen ion and hydroxide ion, which forms water. The potassium and cyanide ions are just along for the ride!
When 8g fully reacts with 12g how many grams of sodium flourine form
A compound is used as a food additive. The compound has a molar mass of 176.124 grams/mole. A 692.5-gram sample undergoes decomposition, producing 283.4 grams of carbon, 31.7 grams of hydrogen, and 377.4 grams of oxygen. What is the molecular formula of the compound?
A. C3H4O3
B. C4H8O4
C. C6H6O6
D. C6H8O6
E. C6H8O8
Here we have to get the correct molecular formula of the compound.
The molecular formula of the compound is C₆H₆O₆ i.e. option C.
Let assume, the empirical formula of the compound is [tex](CHO)_{n}[/tex].
The given molar mass of the compound is 176.124 g/mole.
The percent of carbon in the compound is [tex]\frac{283.4}{692.5}[/tex]×100 = 40.924.
The percent of hydrogen in the compound is [tex]\frac{31.7}{692.5}[/tex]×100 = 4.577.
The percent of oxygen in the compound is [tex]\frac{377.4}{692.5}[/tex]×100 = 54.498.
Now the ratio of the atomic number in the compound for carbon is [tex]\frac{40.924}{12}[/tex] = 3.410
Now the ratio of the atomic number in the compound for hydrogen is [tex]\frac{4.577}{1}[/tex] = 4.577
Now the ratio of the atomic number in the compound for oxygen is [tex]\frac{54.498}{16}[/tex] = 3.406
So, the C, H and O lowest ratio is [tex]\frac{3.410}{3.406}[/tex] = 1, [tex]\frac{4.577}{3.406}[/tex] = 1 and [tex]\frac{3.406}{3.406}[/tex] = 1
Thus the empirical formula of the compound is [tex][CH_{1}O] _{n}[/tex] (where n = integer.
12n + 1n + 16n = 176.24
29n = 176.24
n = 6 (approx)
Thus the molecular formula of the compound is C₆H₆O₆.
Final answer:
By calculating the number of moles of carbon, hydrogen, and oxygen and deriving the ratio among them, it is determined that the molecular formula of the compound with a molar mass of 176.124 grams/mole is C6H8O6 (D).
Explanation:
To find the molecular formula of the compound used as a food additive with a molar mass of 176.124 grams/mole from the given decomposition data, we first need to calculate the number of moles of each element present in the given sample.
For carbon: (283.4 g) / (12.0 g/mol) = 23.62 moles
For hydrogen: (31.7 g) / (1.0 g/mol) = 31.7 moles
For oxygen: (377.4 g) / (16.0 g/mol) = 23.59 moles
Next, we divide by the smallest number of moles to get the atom ratio.
C: 23.62 / 23.59 ≈ 1
H: 31.7 / 23.59 ≈ 1.34
O: 23.59 / 23.59 = 1
The ratio of hydrogen is not a whole number, so we multiply all ratios by the smallest whole number that gives us whole number ratios for each element, which in this case would be 3 (since 1.34 is approximately 4/3).
After multiplying, the moles of each element become:
C: 1 x 3 = 3
H: 1.34 x 3 ≈ 4
O: 1 x 3 = 3
Thus, the empirical formula of the compound is C3H4O3, and the molecular formula is the same as the empirical formula because the molar mass of C3H4O3 (3(12.0) + 4(1.0) + 3(16.0) = 88.0 g/mol) is half that of the given molar mass. Therefore, the molecular formula must be C6H8O6, which is twice the empirical formula.
The correct molecular formula of the compound is D. C6H8O6.
50 points for this
Using the diagram from the question above, which layer is the densest?
Question 2 options:
A
B
C
D
The answer for this question is A
What is the result of multiplying 2.5 times 10 to the power 10 by 3.5×10 to the power of -7
Answer:
8.75 × 10³
Explanation:
Multiply the coefficients and the exponential terms separately; then multiply them together
2.5 × 3.5 = 8.75.
When you multiply exponential terms, you add the exponents.
10¹⁰ × 10⁻⁷ = 10⁽¹⁰⁻⁷⁾ = 10³
The product is 8.75 × 10³.
A scientific calculator does the operation automatically. The buttons may have different labels on your calculator, but the key sequence is usually something like
2.5 Exp 10 × 8.5 Exp +/- 7 = 8.75×10⁻³
Potential energy due to the position of an object above earth surface is called
ANSWER:
Potential energy due to the position of an object above Earth's surface is called gravitational potential energy.
EXPLANATION:
Gravitational energy is the potential energy compared with gravitational force, as work is needed to further things against Earth’s gravity. The potential energy due to high positions is called gravitational potential energy, and is evidenced by water in an elevated storage or kept behind a dam. If an article falls from one point to different point inside a gravitational field, the force of gravitation will do actual work on the object, and the gravitational potential energy will decrease by the same amount.
What is the quantity 456 milligrams converted to grams? Use the table below to help you.
A. 0.000456 g
B. 0.456 g
C. 4.56 g
D. 456, 000 g
Answer:
B.0.456 g
Explanation:
It is that becuase if u convert miligrams to grams it is 1000mg =1g
Which has is produced when Mg(s) is added to HCI(aq)
Scientific theories and everyday theories are similar because _____. a. both are just guesses b. both are types of explanations c. both require scientists to agree d. both must begin as a hypothesis
Answer:
its ethier A OR C
Explanation:
4) An atom of the element ____________has an average atomic mass of about 16 amu. A) oxygen B) sulfur C) nitrogen D) no elements have that mass
I take it your doing the IA? If so you should have a picture of elements above the question. Oxygen is the only one labeled with 16 as the atomic mass :)
Answer:
A) oxygen with an atomic number of 8 with an 99.7% of natural abundance.
Explanation:
The atomic mass of an element is the average mass of an element that is measured in AMU. Mass is expressed as Daltons. Standard atomic weights or mass or the relative isotopic mass of a single isotope is thus tried to that atom. In Order to calculate the atomic mass ad up the protons and neurons. This is usually determined by spectrography. However, the volumes of two gases and masses are obtained by calculating it with the hydrogen taken as one and thus carbon is taken as a reference to the determination of atomic masses.A reversible reaction is a reaction that takes place in the ___________ . If the reaction were to ___________, the rate of the forward reaction would equal that of the reverse reaction.
Explanation:
A reversible reaction is a reaction which results in the formation of products which gives back reactants. Therefore, it is said that a reversible reaction occurs in both forward and backward direction.
Thus, it can be concluded that a reversible reaction is a reaction that takes place in the both directions . If the reaction were to equilibrium, the rate of the forward reaction would equal that of the reverse reaction.equilibrium.
A reversible reaction is a reaction that takes place in the both direction. If the reaction were to equilibrium, the rate of the forward reaction would equal that of the reverse reaction.
What is reversible reaction?The reaction in which reactants is converted into products and products is converted into reactants simultaneously is called reversible reaction.
The equilibrium is takes place in reversible reaction when reversible reaction occurs in closed vessel.
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The question:A new grill has a mass of 30.0 kg. You put 2.0 kg of charcoal in the grill. You burn all the charcoal and the grill has a mass of 30.0 kg. What is the mass in kg of the gases given off? (assume that the charcoal is pure carbon solid and that it burns completely in oxygen).
The answer: Mass of carbon burnt = 2Kg = 2000g
Moles of Carbon burnt = 2000/12
=> Moles of CO2 produced = 2000/12
=> Mass of CO2 produced = 2000/12*44 = 2 333.33 g = 2.33 Kg
In the answer, where did the 44 come from?
Answer:- Molar mass of [tex]CO_2[/tex] .
Solution:- It is a stoichiometry problem. Mass of the grill is 30.0 kg and the mass after burning the grill is also 30.0 kg. It means all the charcol is burned and the gas is given off.
2.0 kg of charcol are converted to grams which is 2000 g. Since charcol is pure solid carbon, the grams are divided by the atomic mass of carbon which is 12.
The combustion equation of charcol is written as:
[tex]C(s)+O_2(g)\rightarrow CO_2(g)[/tex]
From this balanced equation, there is 1:1 mol ratio between charcol and carbon dioxide. So, the moles of carbon dioxide gas formed are equivalent to the moles of charcol. To convert the moles of carbon dioxide to grams we multiply the moles by it's molar mass.
Carbon dioxide has one carbon and two oxygen atoms so it's molar mass = 12 + 2(16) = 12 + 32 = 44
So, 44 is the molar mass of carbon dioxide and above calculations clearly shows how and where we get this.
How many significant figures are in the measurement 768,300 liters?
Since there is no decimal, any zeros that are not in between non-zero numbers are NOT significant.
So
7 - Sig
6- Sig
8- Sig
3- Sig
0- NOT SIG
0- NOT SIG
So, there are 4 sig figs.
gneous rock is formed by the cooling and solidification of molten Earth materials. Igneous rock forms when magma or lava cools. If underground pockets of magma _________________ and solidify, ________________ igneous rock is formed, such as granite. A) cools quickly, extrusive B) cools quickly, intrusive C) cools slowly, extrusive D) cools slowly, intrusive
The answer is d. Igneous rocks is indeed formed through the cooling of molten lava on the surface, making extrusive igneous rock. However, if those underground pockets of magma were to cool underneath the surface, because of its force to, it will still form intrusive igneous rock, slowly cooling.
The study of rocks is called petrology. There are different types of rocks and are igneous rock, magma, igneous rock and etc.
The correct answer is D which is cooled slowly and intrusive.
What is an igneous rock?Igneous rocks (from the Latin word for fire) form when hot, molten rock crystallizes and solidifies. The melt originates deep within the Earth near active plate boundaries or hot spots, then rises toward the surface. Igneous rocks are divided into two groups, intrusive or extrusive, depending upon where the molten rock solidifies.
Igneous rocks are indeed formed through the cooling of molten lava on the surface, making extrusive igneous rock.
However, if those underground pockets of magma were to cool underneath the surface, because of its force, it will still form intrusive igneous rock, slowly cooling.
Hence, the correct answer is option D.
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What is the empirical formula of a compound composed of 30.5 g potassium (k) and 6.24 g oxygen (o)?
In your own words, describe what is the role or function of the neutron in the atom's nucleus
Neutrons are very important in provide stability for an atom. When atoms are created by fusion, neutrons are included in this process. Because protons don't like each other and repel each other that's where neutrons come in.
answer: the role of a neutron in an atom holds the center of the atom so it provides the stability of the center of the atom.
hope this helps! ❤ from peachimin