Help me please!! :D​

Answer:

6.8 mole of O₂

Explanation:

Given expression:

       2H₂   +   O₂   →   2H₂O

Number of moles of H₂ = 13.6moles

Unknown:

Number of moles of O₂  = ?

Solution:

In the given problem, we are to find the number of moles of oxygen gas that will use up 13.6mole of hydrogen gas;

 From the reaction equation;

             2 mole of H₂ will completely react with 1 mole of O₂

         13.6 moles of H₂ will completely be used up by [tex]\frac{13.6}{2}[/tex] mole of  O₂

                                                                                        = 6.8 mole of O₂

Answer:

B

Explanation:

Answer:

D. 3 mol/0.5 L

Explanation:

Just took the quiz

Answer:

CH4 + 2O2 → CO2 + 2H2O

Explanation:

This is all i could come up with im sorry.

The amount of water formed in the given chemical reaction is 9 grams.

Stoichiometry is the calculation for the determination of the relative amount of reactants and products in chemical reactions. Stoichiometry is based on the law of conservation of mass where the total mass of the reactants in reaction equals the total mass of the products.

If the quantity of one reactant is known and the quantity of the product can be determined empirically, then the quantity of the other reactants can be calculated.

Given chemical equation is:

CH₄  +   2O₂  [tex]\longrightarrow[/tex]   CO₂   +   2H₂O

16g        32g         44g           32g        (from their molecular masses)

The amount of methane, oxygen, and carbon dioxide is 4g, 16g, and 32 g respectively.

16g of methane react with oxygen = 32g

4g of  methane will react with oxygen = 8g

It means here methane is the limiting reagent as the given amount of oxygen is more than reacted one.  So CH₄ will decide the amount of water.

16g of methane produces water = 32g

Then 4g of methane will produce water = (32/16) × 4 = 9 g

Therefore, 9 grams of water should be formed in this reaction.

Learn more about Stoichiometry, here:

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Answer:

Uhm if you're failing the class why are you still using brainly to get answers... Where's your momma boy?

Explanation:

It izzz what it izzz

Answer:

B

Explanation:

2. 2Al(s) + 6HCl(aq) + 2AlCl3(aq) + 3H2(g) represents a single replacement reaction

A single replacement reaction is a chemical reaction in which one element replaces the other elements of a compound to produce new elements and compounds

Not all of these reactions can occur. We can use the activity series(voltaic series), which is a list of elements that can replace other elements below / to the right of them in a single replacement reaction.

1. 2Al(s) + 3Cl2(g) → 2AlCl3(s)

Syntesis/combination reaction

2. 2Al(s) + 6HCl(aq) ⇒2AlCl3(aq) + 3H2(g)

Single replacement reaction

3. 2AlCl3(s) → 2Al(s) + Cl2(g)

Decomposition reaction

4. AlCl3(aq) + 3KOH(aq) + Al(OH)3(s) + 3KCl(aq)

Double  replacement reaction

In a single replacement reaction, one element replaces another one. The reaction that shows the single replacement reaction is:

[tex]\bold { 2Al(s) + 6HCl(aq) \rightarrow 2AlCl_3(aq) + 3H_2(g)}[/tex]

[tex]\bold { 2Al(s) + 6HCl(aq) \rightarrow 2AlCl_3(aq) + 3H_2(g)}[/tex]

In the given reaction, aluminum replaces the hydrogen from hydrochloric acid to form Aluminum chloride.

Therefore, the reaction that shows the single replacement reaction is:

[tex]\bold { 2Al(s) + 6HCl(aq) \rightarrow 2AlCl_3(aq) + 3H_2(g)}[/tex]

Learn more about Single replacement reaction:

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Answer:

For example, friction between our shoes and the floor stop us from slipping and friction between tyres and the road stop cars from skidding. Friction is sometimes unhelpful. For example, if you don't lubricate your bike regularly with oil, the friction in the chain and axles increases.

Explanation:

Answer:

82

Explanation:

i took the assingment

Answer:

Put sand in one cup and water in the other. Put two heat lamps at equal height and under each one put the water and sand, this must be done at the same exact time. Set a timer for 5, then 10, then 15, and so forth minutes. Each time measure the temperature of each with the thermometers and write the down. Have a certain temperature you want them to get to and see which gets to it quicker. Then set a new temp 3 times to see if the answer is consistent.

Explanation:

Doing this would test whether land or water heats quicker.

Answer:

heat lamps

Explanation:

Answer:

It’s b

Explanation:

Answer:

Regulation of the cell cycle is carried out by which of the following? Check all that apply.

CdKs  

cyclins

What is the role of CdKs?

to signal the cell to move to the next phase of the cell cycle

Explanation:

Answer:

Today, I will present the first eighteen elements which are Hydrogen, Helium, Lithium, Beryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Sodium, Magnesium, Aluminum, Silicon, Phosphorus, Sulfur, Chlorine, and Argon.

First 5: Hydrogen. The first and simplest element on the periodic table.

Helium. a very light colorless element that is one of the six inert gasses.

Lithium. A very soft, light metal.

Beryllium. A very light metal; although it is 3 1/2 times the density of Lithium.

Boron. The fifth element in the periodic table.

Explanation:

Answer:

It would be about 1 g/mL.

Explanation:

With the information provided the volume of the chalk can be said to be about 5mL.

Hence;

Its density = 5g/5mL = 1g/mL.

Answer: New Moon Phase

Explanation:

Answer:

The New Moon phase

Explanation:

The moon in between the earth and the sun will cause it being a new moon because the sun's light doesn't reach the side of the moon thats facing the earth

Answer:

3.011×1023 individual carbon dioxide molecules

Answer:

Butane and benzene are both compounds. They contain multiple elements bonded together in a specific ratio. Kerosene and gasoline are mixtures because they are combinations of several compounds. Oxygen is an element because it is made up of only one type of atom.

Explanation:

Answer:

The answer is B

Explanation:

Inertia: a tendency to do nothing or to remain unchanged.

Answer:

Sort of answer, but it'll lead you in the right direction I hope.

Explanation:

I mean, ofc, the molecules or atoms or whatever the circles are can't be put together that way bc matter says so. It looks like the other diagram is showing water or gas, and if it were turning into the one on the right, then it would usually either settle into water if it was gas or become a single solid object like water. If this is gas, then it doesn't make sense, because gas particles are always separate from each other.

Answer:

Neodymium

Explanation:

Answer:

the zinc strip begins to darken. If left in the solution for a longer period of time, the zinc will gradually decay due to oxidation to zinc ions.

Explanation:

Answer:

d

Explanation:

check if one element replaces another element in a compound

The single replacement reaction can be identified when there has been the replacement of one element with another element in the compound. Thus, option C is correct.

The replacement reaction can be defined as the reaction in which the highly reactive element replaced the low reactive element in the reaction and forms a compound.

The reaction has been given as:

X + AY [tex]\rightarrow[/tex] AX + Y

The X has been highly reactive than Y replaces Y in the compound and forms the compound AX.

The single replacement reaction can be identified when there has been the replacement of one element with another element in the compound. Thus, option C is correct.

For more information about a single replacement reaction, refer to the link:

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Hello. You did not say what is the experiment to which this question refers, which makes it impossible for it to be answered accurately.

However, advice that should be given to anyone who should start an experiment is: establish a control treatment, provide all treatments with the same variables and the same resources, write down everything that happened in the experiment from implementation to data collection and results, make measurements and analyzes on the same date in all treatments and keep the steaks in the same environment.

Answer:

Which Lab are you doing?

Explanation:

An acid is a substance that ionizes to produce excess hydrogen ion in solutions.

It takes 11.4 days⇒three half-lives

General formulas used in decay:  

[tex]\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{t/t\frac{1}{2} }}}[/tex]

T = duration of decay  

t 1/2 = half-life  

N₀ = the number of initial radioactive atoms  

Nt = the number of radioactive atoms left after decaying during T time  

t1/2=3.8 days

No=4.38 μg

Nt=0.55 μg

[tex]\tt 0.55=4.38\dfrac{1}{2}^{t/3.8}\\\\0.125=\dfrac{1}{2}^{t/3.8}\\\\\dfrac{1}{2}^3=\dfrac{1}{2}^{t/3.8}\\\\3=t/3.8\rightarrow t=3.8\times 3=11.4~days[/tex]

Answer:

a. The density of the aluminum will change if the sample gets too big.

Explanation:

Since increasing its size increases its volume hence it affects the value of its density by decreasing.

note: Density = mass/volume.

Answer:

La configuración electrónica del aluminio es: 1s² 2s² 2p⁶ 3s² 3p¹

Explanation:

El aluminio es un elemento semimetálico de número atómico Z= 13. Con el número atómico y el diagrama de Moeller se puede hallar su configuración electrónica:

1s² 2s² 2p⁶ 3s² 3p¹

Answer:

Did you just let your cat walk on your keyboard? XD

Could you explain this a bit better please?

I'll answer the question in the replies of this comment if you can give me a bit more information.

Explanation:

May I have brainliest please? :)

Answer:

Concentration is a measure of how much solute (or dissolved "stuff") is present per amount of solvent (or dissolving liquid) in a solution. The most common measurement of concentration is molarity, abbreviated M. Molarity is expressed in amount per volume, or moles/liter.

Explanation:

Answer:

An electron can become excited if it is given extra energy, such as if it absorbs a photon, or packet of light, or collides with a nearby atom or particle.

Explanation:

Mark me brainliest.