Can someone please answer this question please I really need to know

100 g O₂

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

[RxN - Balanced]   CH₄ + 2O₂ → CO₂ + 2H₂O

[Given]   2 mol CH₄

[Solve]   x g O₂

Step 2: Identify Conversions

[RxN] 1 mol CH₄ → 2 mol O₂

[PT] Molar Mass of O - 16.00 g/mol

Molar Mass of O₂ - 2(16.00) = 32.00 g/mol

Step 3: Stoichiometry

Step 4: Check

Follow sig fig rules and round. We are given 1 sig fig.

128 g O₂ ≈ 100 g O₂

Mass of O₂= 128 g

Given

Reaction

CH₄ + 20₂ → CO₂ + 2H₂O

2 moles of CH₄

Required

Mass of O₂

Solution

In a chemical equation, the reaction coefficient shows the mole ratio of the compounds involved in the reaction, reactants or products

From the equation, mol ratio of CH₄ : O₂ = 1 : 2, so moles O₂ :

= 2/1 x moles CH₄

= 2/1 x 2

= 4 moles

Mass of O₂ :

= mol x MW

= 4 x 32 g/mol

= 128 g

Answer:

[tex]\mathbf{m= 47 \ g}[/tex]

Explanation:

The heat needed to melt ice [tex](q_1)[/tex] + heat needed to cool water [tex](q_2)[/tex] = 0

[tex]m\Delta H_{fusion} + mc \Delta T = 0[/tex]

[tex]m \times 333.55 J g^{-1} + 250 \ g \times 4.184 \ Jg^{-1 \ 0 } \times (-15.0 \ ^0 C) = 0[/tex]

[tex]m \times 333.55 J g^{-1} =15690[/tex]

[tex]m=\dfrac{15690 \ J }{333.55 J g^{-1} }[/tex]

[tex]\mathbf{m= 47 \ g}[/tex]

Answer:

91.49 grams

Explanation:

No of molecules = no of moles × Avogadro's number

No of moles = No of molecules / Avogadro's number

Number of moles = 5.4×10^23/6.02×10^23

Number of moles = 0.897 moles of Al2O3

Number of moles = mass in gram / molar mass

Mass in gram = number of moles× molar mass

Mass in gram = 0.897× 102

91.49 grams

Answer:

The amount of fluid displaced is directly related (via Archimedes' principle) to its volume. In the case of an object that sinks (is totally submerged), the volume of the object is displaced. In the case of an object that floats, the amount of fluid displaced will be equal in weight to the displacing object.

Explanation:

wikipedia

Answer:

See answer below

Explanation:

As you are asking for chemical formula and ionic equation, then, I will assume that after the station #3 below, are the solutions you are requiring.

You are also not specifing if you want for example, result of solution 1 + solution 3. If you need that, please post that on another question.

Now for the chemical formula, you need to identify the elements in all 3 solutions, and also the type of compound.

1. Solution 2 Potassium Iodide:

In this case we have Potassium on one side, and Iodine on the other side, the symbol for those are K and l. As Potassium have the +1 oxidation state, cause is the only one that it can have, when it's next to an halide like chlorine or bromine, it will form a binary salt. The halides, usually work with the lowest oxydation state. In the case of Iodide it will be -1, so, the formula will be:

KI

And the net ionic equation will be the chemical equation that shows how the charges and atoms are balanced. In this case it would be:  

K⁺ + I⁻ ------> KI

2. Solution 1 and 3, Lead (II) nitrate and Sodium carbonate:

In this case I will work with both, because both of the solution are tertiary compounds. In this cases, we have two tertiary salt, The Sodium symbol is Na, and is working with it oxydation state +1. Carbonate is an anion and have the formula CO₃ working with the oxydation state -2. Lead can work with oxidation state +2 and +4. It's symbol is Pb. Nitrate is NO₃ and works with oxydation state -1 instead.

The chemical formula and ionic equation for both will be:

Lead(II) nitrate: Pb(NO₃)₂

Sodium Carbonate: Na₂CO₃

And the net equations:

Lead nitrate: Pb²⁺ + 2NO₃⁻ ------> Pb(NO₃)₂

Copper sulfate: 2Na⁺ + CO₃²⁻ -------> Na₂CO₃

Hope this helps

Answer:

the answer is it results in a change of temperature in both objects

Answer:

[tex]density \: of \: the \: silver = \frac{mass}{volume} = \frac{21}{2} \\ = 10.5 \: gram {(cm)}^{ - 3} [/tex]

Explanation:

recall that density is equal to mass/volume :21÷2= 10.5g/cm3

Explanation:

Alcoholic fermentation converts one mole of glucose into two moles of ethanol and two moles of carbon dioxide, producing two moles of ATP in the process. The overall chemical formula for alcoholic fermentation is: C6H12O6 → 2 C2H5OH + 2CO

Answer:

1. If you leave yeast fermentation out for 3 days what happens?

2. If you put yeast fermentation out in the sun will it still work?

Explanation:

These can be answered through scientific investigation.

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Answer:

I think it's K2Al2B2O7

Aluminum Borate or Aluminum Boron Oxide is AlBO₃

on reaction:

BO₃⁻³  +  Al⁺³  ==> AlBO₃

Answer:

A

Explanation:

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Answer:

The Lichen Symbiosis

Lichens are made up of two or more closely interacting organisms, a fungus, and one or more partners, called photobionts. The photobiont may be an alga and/or cyanobacteria, both of which can produce simple sugars by photosynthesis.

Explanation:

a. 43.1 g

b. 38.2%

Given

32.5 grams of NaOH

Required

The theoretical yield of Na₂CO₃

The percent yield

Solution

Reaction

2NaOH(s) + CO₂(g) → Na₂CO₃(s) + H₂O(l)

mol NaOH :

= mass : MW

= 32.5 : 40 g/mol

= 0.8125

mol Na₂CO₃ from the equation :

= 1/2 x mol NaOH

= 1/2 x 0.8125

= 0.40625

a.

Mass Na₂CO₃ :

= mol x MW Na₂CO₃

= 0.40625 x 106 g/mol

= 43.0625≈43.1 g

b. % yield = (actual/theoretical) x 100%

%yield = 16.45/43.1 x 1005

%yield = 38.17%≈38.2%

Answer: ATP is the energy currency molecule which is required for cellular processes.

Explanation:

When the cell require metabolic energy to perform a particular a task. From the ATP or adenosine triphosphate molecule one of three phosphate molecule gets displaced and liberates the resulting molecule becomes adenosine diphosphate or ADP. The phosphate molecule is used by the cell to perform different cellular and metabolic functions as a source of metabolic energy. The phosphate is released by the hydrolysis of the phosphoanhydride bond with the other phosphate group.

Answer:

So one mole of ccl4 contains 152 grams. it implies that 3 moles of ccl4 contains 152 * 3 grams. it is equal to 456. grams.

Explanation:

Hope this helps

Answer:

Hope it helps.

Explanation:

When zinc reacts with hydrochloric acid it produces zinc chloride and hydrogen gas.

Answer:

The muscular system is composed of specialized cells called muscle fibers. Their predominant function is contractibility. Muscles, attached to bones or internal organs and blood vessels, are responsible for movement. Nearly all movement in the body is the result of muscle contraction.

[tex]\huge\star{\underline{\mathtt{\red{A}\pink{N}\green{S}\blue{W}\purple{E}\orange{R}}}}\star[/tex]

The muscular system is composed of specialized cells called muscle fibers.

Their predominant function is contractibility. Muscles, attached to bones or internal organs and blood vessels, are responsible for movement.

Nearly all movement in the body is the result of muscle contraction.

Answer:

1.  average kinetic energy of its particles

Explanation:

The temperature of a substance is a measure of the average kinetic energy of its particles.

The average kinetic energy of the particles of a substance is directly proportional to its temperature. This is one of the premise of the kinetic theory of gases.

%yield = 86.93%

Given

Reaction

CaCN₂+3H₂O=>CaCO₃+2NH₃

Required

The percent yield

Solution

mol CaCN₂(MW= 92 g/mol) :

= mass : MW

= 77 g : 92 g/mol

= 0.834

From equation, mol NH₃ :

= 2/1 x mol CaCN₂

= 2/1 x 0.834

= 1.668

Mass NH₃(theoretical):

= 1.668 mol x 18 g/mol

= 30.024 g

% yield = (actual/theoretical) x 100%

%yield = (26.1/30.024) x 100%

%yield = 86.93%

Answer:

The number of moles of Al2O3 formed is about 4.25 moles

Explanation:

Answer:

So, the elements with similar properties to sodium (Na) are all of those elements in the same Group.

Explanation:

The ones "most" similar would be the ones closest in mass as well. Those would be Lithium (Li) and Potassium (K).

Answer:A) N and P

Explanation:

N and P, because they are in the same group on the periodic table. This is because they both have 3 valence electrons, and properties of elements are dependent partly on the number of valence electrons they have.

Answer:

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Explanation:

Answer:

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Answer:

njjii

Explanation:

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Answer:

the aqueous solution of Naclis known as brine

Answer:

d

Explanation:

Answer:

A

Explanation:

b) N, P, As, Bi

Learn more:

brainly.com/question/371590

Answer:

Distance

Explanation:

Speed= Distance/ Time

Answer:

Distance would be the answer! :)

Answer:

The equation is already balanced. It is a double replacement.

Explanation:

The equation is balanced since there are the same amounts of each element on both sides. A double replacement is when AB + CD = AD + CB. In this case, Ag (A) reacts with CL(D) and Na (C) reacts with NO3 (B).