4. Magnesium and oxygen undergo a chemical reaction to
produce magnesium oxide.
2Mg + O2 + 2MgO
If 24.4 grams of magnesium react with oxygen gas to produce
40.5 grams of magnesium oxide, what is the mass in grams of
the oxygen gas in the chemical change?

4. Magnesium And Oxygen Undergo A Chemical Reaction Toproduce Magnesium Oxide.2Mg + O2 + 2MgOIf 24.4

Answers

Answer 1

Answer:

About 16.1 grams of oxygen gas.

Explanation:

The reaction between magnesium and oxygen can be described by the equation:
[tex]\displaystyle 2\text{Mg} + \text{O$_2$} \longrightarrow 2\text{MgO}[/tex]

24.4 grams of Mg reacted with O₂ to produce 40.5 grams of MgO. We want to determine the mass of O₂ in the chemical change.

Compute using stoichiometry. From the equation, we know that two moles of MgO is produced from every one mole of O₂. Therefore, we can:

Convert grams of MgO to moles of MgO. Moles of MgO to moles of O₂And moles of O₂ to grams of O₂.

The molecular weights of MgO and O₂ are 40.31 g/mol and 32.00 g/mol, respectively.

Dimensional analysis:

[tex]\displaystyle 40.5\text{ g MgO} \cdot \frac{1\text{ mol MgO}}{40.31\text{ g MgO}} \cdot \frac{1\text{ mol O$_2$}}{2\text{ mol MgO}} \cdot \frac{32.00\text{ g O$_2$}}{1\text{ mol O$_2$}} = 16.1\text{ g O$_2$}[/tex]

In conclusion, about 16.1 grams of oxygen gas was reacted.

You will obtain the same result if you compute with the 24.4 grams of Mg instead:

[tex]\displaystyle 24.4\text{ g Mg}\cdot \frac{1\text{ mol Mg}}{24.31\text{ g Mg}} \cdot \frac{1\text{ mol O$_2$}}{1\text{ mol Mg}} \cdot \frac{32.00\text{ g O$_2$}}{1\text{ mol O$_2$}} = 16.1\text{ g O$_2$}[/tex]


Related Questions

Which term describes this reaction? 2 central carbons double bonded to each other, with h above right and left and below right and left plus upper c l single bond upper c l right arrow 2 central c single bonded to each other; each is single bonded to upper c l above, and to h below and to the outside. addition condensation elimination substitution

Answers

Answer:

Which term best describes this reaction?

         CH₃  H         ┌ CH₃   H ┐

           │     │         │  │       │  │

       n C ═ C  ➝    ├ C ── C ┤

          │      │         │  │       │  │

          H     H         └  H      H ┘

❌ A) condensation polymerization

✔️ B) addition polymerization

❌ C) hydrohalogenation

❌ D) hydration

I Took Question Test And Have Nice Day.

Answer:

The best answer out of the 4 Would be A. Addition

Explanation:

I took the Test.

Which best represents the reaction of calcium and zinc carbonate (znco3) to form calcium carbonate (caco3) and zinc? ca → znco3 caco3 → zn ca znco3 → caco3 zn caco3 zn → ca znco3 caco3 zn ca → znco3

Answers

The equation which best describes the reaction of calcium and zinc carbonate to form calcium carbonate and zinc is Ca+ZnCO₃→CaCO₃+Zn.

What is chemical reactions?

Chemical reactions are those reactions in which one or more reactants combine with each other for the formation of new product.

In the question it is mention that calcium reacts with zinc carbonate for the formation of calcium carbonate and zinc in the following manner:
Ca + ZnCO₃ → CaCO₃ + Zn

All reactions rather than the above reaction is incorerct as in that proper combination of molecules are not given.

Hence required chemical reaction is Ca + ZnCO₃ → CaCO₃ + Zn.

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Answer:

to keep it short it’s B;)

Explanation:

The Ksp of barium sulfate (BaSO4) is 1.1 × 10–10. What is the solubility concentration of sulfate ions in a saturated solution at 25°C?
1.5 × 10–5M
1.0 × 10–5M
5.5 × 10–11M
7.4 × 10–6M

Answers

Answer:

Your answer would be:
B.) 1.0 × 10–5M



Explanation:

Have a great rest of your day
#TheWizzer

Answer:

The answer is B.

Explanation:

pretty quite, when everyones acc gets deleted SMH -;-

Note 3 key dates in blood spatter history and what those dates mean to evidence today

Answers

The question relates to Blood Splatter Analysis and relates to both law and Forensic science.

What are the three key dates in Blood Splatter History?

The three key dates in Blood Splatter History and what those dates mean to evidence today are:

1895 - The first modern study of Bloodstains;1954 - The Sam Sheppard Case (July 4th, 1954). This was instrumental in the expansion of blood spatter analysis techniques in the U.S.1983 - 22 parties met for the first time in New York in a conference to promote new forensic science. This number has grown to 800 covering six regions worldwide.

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Which ion was formed by providing the second ionization energy to remove an electron? ca2 n3– fe3 s2–

Answers

 Ca²⁺

________________

ca2! Have a nice day!

Behavioral changes of individuals of a species that allow for better survival. (Acquired traits)

Incorrect Chlorophyll?

Answers

Natural selection is the process that selects the organism that can survive and reproduce in an altered environment. These behavioral changes are adapted.

What is adaptation?

Adaptation is the part of natural selection and a trait that allows the improved organism to survive and reproduce in environmental conditions.

The adapted organism can survive and reproduce in the changed environmental conditions by the process of natural selection.

Therefore, adaptation allows for better survival through behavioral changes in individuals.

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Which is a characteristic of a strong base? it turns pink phenolphthalein colorless. it turns blue litmus paper red. it releases h ions into a solution. it removes h ions from solution.

Answers

The characteristic of a strong base is that it removes H⁺ ions from solution.

What is strong bases?

Strong bases are those substance which have a pH range in between the value of 7.1 to 14.

Strong bases changes the colorless phenolphthalein into pink color in basic medium, so first option is incorrect.Strong bases chnages red litmus paper to blue color, so second option is also incorrect.Bases not gives H⁺ ion to the solution, so it is also not correct.Strong bases removes H⁺ ion from the solution by their consumption and makes solution more basic.

So, strong bases removes H⁺ ion from the solution.

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Answer:

It removes H+ ions from solution.

Explanation:

i got it right

How much energy is given off by the following reaction, if 162.5 g of oxygen reacts with excess ammonia (NH3)? 4 NH3 + 5 O2 + 4 NO + 6 H2O AH = -1225.6 kJ​

Answers

From the enthalpy values, 1244.8 kJ of heat is given off when 162.5 g of oxygen reacts with excess ammonia.

What is the amount of heat given off in a reaction?

The amount of heat given off in a reaction is known as enthalpy change.

Heat is given off in an exothermic reaction.

From the enthalpy value of the given reaction, 1225

6 kJ of heat is given off when 5×32 g or 160 g of oxygen reacts with ammonia.

Amount of heat given off when 162.5 g of oxygen reacts with excess ammonia is;

Heat given off = 1225.6 kJ × 162.5/160 = 1244.8 kJ

Therefore, 1244.8 kJ of heat is given off when 162.5 g of oxygen reacts with excess ammonia.

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How fast is the wind have to blow to be classified as a hurricane?

Answers

74 mph (64 KT)

Explanation:

when the wind exceeds 74 mph (64 KT), the storm is considered to be a hurricane.

Is this statement true or false?

Decomposers such as bacteria recycle dead tissue into reusable chemicals for other producers. Then the consumers eat the producers. This is an example of how nutrients are recycled through an ecosystem

Answers

It is true that decomposers such as bacteria recycle dead tissue into reusable chemicals for other producers, which are then eaten by consumers.

What is nutrient recycling?

Nutrient recycling is the process by which essential elements in the ecosystem are in transition between abiotic and biotic factors.

In an ecosystem, the following groups of organisms exists:

Producers e.g plantsConsumers e.g. herbivores, carnivoresDecomposers e.g. bacteria, fungi

Decomposers are responsible for breaking down dead tissues of living organisms leading to the release of nutrients to the soil. These nutrients are used by producers, which are then eaten by consumers.

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A chemist is using a solution of hno3 that has a ph of 3.75. what is [h ] for the solution?

Answers

A chemist is using a solution of HNO₃ that has a pH of 3.75. what is [H⁺] for the solution is 1.7 × 10⁻⁴M.

How do we calculate the [H⁺]?

Concentration of H⁺ ion will be calculated by using the below equation of pH as:

pH = -log[H⁺]

or [H⁺] = [tex]10^{-pH}[/tex]

Given that, pH = 3.75

So concentration of H⁺ ion will be calculated as:

[H⁺] = [tex]10^{-3.75}[/tex]

[H⁺] = 1.7 × 10⁻⁴M

Hence concentration of H⁺ ion is 1.7 × 10⁻⁴M.

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If the carbon atom of each of the incoming CO2 molecules is labeled with a radioactive isotope of carbon, which organic molecules will be radioactively labeled after one cycle

Answers

Answer:

B, C, D, and E

Explanation:

a
a
4. Suppose the temperature inside a sealed container increases. How do you
expect this change to affect the partial pressure of each gas in a mixture of
gases inside the container? How does it affect the total pressure?

Answers

Answer:

The volume of the system will change and maybe the shape of the system boundary

How many Hydrogen moles needed to get the energy to equal 1 mol of gasoline?

Answers

Answer:

1 grams Hydrogen is equal to 0.992122546977 mole.

Explanation:

Hydrogen is equal to 0.992122546977 mole.

The diagram below shows the branching tree diagram for humans. The text box below it shows the set of derived shared characteristics for the branching tree.

A slanting, horizontal line is shown. On the extreme left, there is a label that says Common Ancestor. Along the slanting, horizontal line there are five dots labeled from left to right as 1, 2, 3, 4, and 5. There is one vertical line between each of the consecutive five dots. The lines are labeled from left to right as Perch, Frog, Pigeon, Rats, and Human. A text box below the branching tree diagram is labeled Derived Shared Characteristics. In the box it says from left to right, Terrestrial during all stages, Jaws, Walking on two legs, Mammary glands and hair, and Four limbs.

Look at the possible derived shared characteristics, shown in the text box. Think about where these should be placed along the branching tree diagram. From the text box, select a shared derived characteristic that humans and rats have. Explain why you think humans and rats share this characteristic.

Answers

Answer:

I would write "terrestrial/lives on land during all life stages" between the frog and pigeon branches

Explanation:

Jaw evolution has started with fish, so i'd place that before the perch, evolution of four limbs is next and I would plate it between the perch and the frog. Evolution of an egg has ensured that organisms remain terrestrial during all stages of life and don't need to rely on water to lay their eggs. So I would place that between the frog and the pigeon. True mammary glands and true hair, as we know it formed on mammals so i'd place that between the pigeon and the rats (although synapsids evolved similar structures long before birds even existed). And lastly, I would place "walking on two legs" between rats and human branches. Because our ancestors evolved bipedalism relatively late.

What are the types of precipitation?

Select four correct answers.

(1) dew

(2) hail

(3) wind

(4) rain

(5) sleet

(6) fog

(7) snow

(I might answer it by myself so be quick)

Answers

Answer:

Rain,Hail,Snow,sleet. Hope this helped you out!

What enzyme performs an isomerization reaction carried out by dehydration and hydration steps and contains a 4Fe-4S cluster that is involved in substrate binding

Answers

Aconitate hydratase is the enzyme which performs an isomerization reaction carried out by dehydration and hydration steps.

What is an Enzyme?

These are proteins which serves as biological catalyst thereby accelerating the rate of chemical reaction.

This enzyme catalyses the stereo-specific isomerization of citrate to isocitrate and contains a 4Fe-4S cluster that is involved in substrate binding.

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How to keep chocolate covered strawberries from sweating?.

Answers

Answer: by putting them in the freezer

Explanation:

15. The specific heat of silver is 0.24 J/g*^ 0 C How many joules of energy are needed to warm 4.37 g of silver from 25.0C to 27.5 degrees * C ? 0.14 J 46 J 0.022 J

Answers

2.62J of energy will be required to warm a silver metal from a temperature of 25°C to 27.5°C.

How to calculate joules?

The energy required in a calorimetry can be calculated using the following formula:

Q = m × c × ∆T

Where;

Q = quantity of heat absorbed or releasedm = mass of substancec = specific heat capacity∆T = change in temperature

According to this question, 4.37 g of silver should be heated from 25°C to 27.5°C. The heat required is as follows:

Q = 4.37 × 0.24 × (27.5 - 25)

Q = 1.0488 × 2.5

Q = 2.62J

Therefore, 2.62J of energy will be required to warm a silver metal from a temperature of 25°C to 27.5°C.

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Practice: Isotope Calculations #2 worksheet

Answers

Iotopes of elements are atoms of the same element which differ in their mass numbers due to differences in neutron number in the nucleus.

What are isotopes?

Isotopes are atoms of an element which have the same atomic number but different mass numbers.

The difference in mass number is due to difference in number of neutrons in the nucleus of the atom.

The data of the given isotopes of elements are as follows:

[tex]^{24}Na, Na-24, 11, 24, 11, 12, 11[/tex]

[tex]^{32}O, O-32, 16, 32, 16, 16, 16[/tex]

[tex]^{44}Ca, Ca-44, 20, 44, 20, 24, 20[/tex]

[tex]^{24}Mg, Mg-24, 12, 24, 12, 12, 12[/tex]

[tex]^{64}Zn, Zn-64, 30, 64, 30, 34, 30[/tex]

[tex]^{207}Pb, Pb-207, 82, 207, 82, 125, 82[/tex]

[tex]^{238}U, U-238, 92, 238, 92, 146, 92[/tex]

[tex]^{129}Te, Te-129, 52, 129, 52, 77, 52[/tex]

[tex]^{19}F, F-19, 9, 19, 9, 10, 9[/tex]

Therefore, isotopes of elements differ in their mass numbers.

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Answer:

2,4, 7, Ng, N, P 6,9

Explanation:

How are polypeptides and proteins similar?

Answers

Answer:

C.

Explanation:

Suppose a balloon contains a mixture of helium nitrogen and oxygen gas is a pressure exerted by the mixture is 101.2 KPA the partial pressure of helium is 80.1 KPA and the part of coal pressure of nitrogen is 16.2 KPA what is the partial pressure of oxygen in the balloon



giving lots of points

Answers

Answer:

4.9 kPa

Explanation:

Dalton's law of partial pressures states that the total pressure of a mixture of gases is the sum of the partial pressures of the individual gases.

In other words:
[tex]\displaystyle P_T = P_\text{O$_2$} + P_\text{N$_2$} + P_\text{He}[/tex]

The total pressure is 101.1 kPa. The partial pressure of He is 80.1 kPa. The partial pressure of N₂ is 16.2 kPa. Substitute and solve for O₂:


[tex]\displaystyle \begin{aligned} (101.2\text{ kPa}) & = P_\text{O$_2$} + (16.2\text{ kPa}) + (80.1\text{ kPa}) \\ \\ P_\text{O$_2$} & = 4.9\text{ kPa}\end{aligned}[/tex]

In conclusion, the partial pressure of oxygen in the balloon is 4.9 kPa.

A mixture of two gases with a total pressure of 8.00 atm contains 0.60 atm of Gas A. What is the partial pressure of Gas B

Answers

Answer:

Pt = Total pressure, Pa = Gas A and Pb = Gas B

Pt = Pa + Pb

Pt - Pa = Pb

Explanation:

Pb = Pt - Pa

Pb = 8.00 atm - 0.60 atm

Pb = 7.4 atm

The total pressure of a gaseous mixture is the sum of pressure of its component gases. Thus the partial pressure of gas B in the mixture of total pressure 8 atm containing 0.60 atm A is 7.4 atm.

What is partial pressure ?

Partial pressure of a component gas in a mixture of gases is the contribution of that gas to the overall pressure or total pressure of the mixture.

Let the a mixture contains n number of gases and each with a pressure of P1, P2 etc.Then the total pressure be written as follows:

[tex]\rm P_{total} = \sum P_{i} = \sum P_{1} + P_{2}+ P_{3} .....[/tex]

Here the mixture containing gas A and B with partial pressure Pa and Pb. The total pressure of the gas is given 8 atm and Pa is given 0.60 atm . Thus,

[tex]\rm P_{total} = P_{a} + P_{b}[/tex]

8 atm = 0.60 + Pb

Pb = 8 - 0.6 = 7.4 atm.

Hence, the partial pressure of gas B os 7.4 atm.

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What is the residue when the reaction mixture is filtered

Answers

Answer:

Filtration can be used to separate an insoluble solid from a liquid, or a precipitate from the reaction mixture in which it formed. The solid which collects in the filter paper is called the residue. The clear liquid which passes through the filter paper is called the filtrate.

Explanation:

i had this question before

The radioactive element francium undergoes a series of nuclear decays, eventually forming a stable isotope of lead. One part of the process involves

francium-221 undergoing two alpha decays, followed by a beta decay.

Answers

The element formed after this portion of the decay series is

213,84Po. This is further explained below.

What is the element formed after this portion of the decay series?

Generally, when the radioactive element francium undergoes a series of nuclear decays the sum of the mass number, the atomic number, and decay particles are equal.

In conclusion, francium-221 decays to to its first beta decay to give 213,84Po

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CQ

The radioactive element francium undergoes a series of nuclear decays, eventually forming a stable isotope of lead. One part of the process involves francium-221 undergoing two alpha decays, followed by a beta decay. What is the element formed after this portion of the decay series? (In the box below, type in the symbol using the isotope tool. An example for carbon-12 is provided.)

The pressure needed to pump blood back to the heart is produced by the _____.

A. body muscles
B. contracting arteries
C. heart

Answers

Answer:

A. body muscles

The pressure needed to pump blood back to the heart is produced by the body muscles .

Write a two to four sentence conclusion statement explaining how the potential energy diagram is used to identify if the reaction is endothermic or exothermic, if heat was released or absorbed, and why the sign of enthalpy change was positive of negative. There should be a conclusion statement for each graph.

Answers

Answer:

The Heat of a reaction is given as the heat content/heat of formation/enthalpies of the products minus the heat content/heat of formation/enthalpies of the reactants. If the potential energy diagram has the product(s) having a higher potential energy than the reactant(s), then the reaction is an endothermic reaction (this is why the reaction absorbs heat from the surroundings to try to make up for the lack of potential energy of the reactants) and the sign on the enthalpy change is visibly positive since H(products) > H(reactants) If the potential energy diagram has the reactant(s) having a higher potential energy than the product(s), then the reaction is an exothermic reaction (this is why the reaction releases heat to the surroundings to try to take care of the higher potential energy of the reactants) and the sign on the enthalpy change is visibly negative since H(reactants) > H(products).

Explanation:

hope it helps:)

Why does benzocaine precipitate during neutralization?.

Answers

Explain why benzocaine precipitates during the neutralization.

With the addition of an acid, the amine group on the benzocaine will become protonated. The protonation creates a positive charge on the benzocaine molecule. Because of this, benzocaine will become soluble in a polar solvent. However, when the solution is returned to a more basic pH level, the amine will no longer be protonated. Thus, the benzocaine will no longer be soluble and will precipitate during neutralization.

When is the small size of gas particles taken into account?
No bots!

Answers

Answer:

At high pressures and low temperatures.

Explanation:

That's when the volume of the gas is quite small.

The volume of the gas particles can then be a significant proportion of the total volume.

Answer:

At high pressure and low temperature.

Explanation:

Remember how ideal gases behave under high temperatures and low pressure.

So the opposite would be when gas particles are taken into account.

The burning of magnesium is a highly exothermic reaction. How many kilojoules of heat are released when 0. 75 mol of Mg burn in an excess of O2?


2Mg(s) + O2(g) → 2MgO(s) + 1204 kJ

Answers

Taking into account the definition of enthalpy of a chemical reaction, the quantity of heat released when 0.75 moles of Mg are burned is 451.5 kJ.

Enthalpy of a chemical reaction

The enthalpy of a chemical reaction is known as the heat absorbed or released in a chemical reaction when it occurs at constant pressure. That is, the heat of reaction is the energy that is released or absorbed when chemicals are transformed into a chemical reaction.

The enthalpy is an extensive property, that is, it depends on the amount of matter present.

Heat released in this case

In this case, the balanced reaction is:

2 Mg(s) + O₂ (g) → 2 MgO(s) + 1204 kJ

This equation indicates that when 2 moles of Mg reacts with 1 mole of O₂, 1204 kJ of heat is released.

When 0.75 moles of Mg are burned, then you can apply the following rule of three: if 2 moles of Mg releases 1204 kJ of heat, 0.75 moles of Mg releases how much heat?

[tex]heat=\frac{0.75 moles of Mgx1204 kJ}{2 moles of Mg}[/tex]

heat= 451.5 kJ

Finally, the quantity of heat released when 0.75 moles of Mg are burned is 451.5 kJ.

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