How many liters of hydrogen gas will be produced at STP from the reaction of 5.159 x 1021 atoms of magnesium with 55.23 g of phosphoric acid (H3PO4)?

3 Mg + 2 H3(PO4) Mg3(PO4)2 + 3 H2

Answers

Answer 1

Answer:

0.190L of hydrogen may be produced by the reaction.

Explanation:

Our reaction is:

3Mg + 2H₃PO₄ →  Mg₃(PO₄)₂ + 3H₂

We need to determine the limting reactant. Let's find out the moles of each:

5.159×10²¹ atoms . 1 mol / 6.02×10²³ atoms = 0.00857 moles of Mg

55.23 g . 1 mol / 97.97 g = 0.563 moles of acid

2 moles of acid react to 3 moles of Mg

0.563 moles of acid may react to: (0.563 . 3) /2 = 0.8445 moles of Mg

Definetely the limting reactant is Mg.

As ratio is 3:3, 3 moles of Mg can produce 3 moles of hydrogen

Then, 0.00857 moles of Mg must produce 0.00857 moles of H₂

At STP, 1 mol of any gas occupies 22.4L

0.00857 mol . 22.4L / 1mol = 0.190L


Related Questions

the ending of a compounds name that is made up of three elements,one of which is oxygen​

Answers

Answer:

—COOH

Explanation:

—COOH, acid group, containing 3 elements, C, carbon, O, oxygen, and H, hydrogen.

A certain atom has a mass of 16 and an atomic number of 7. What element is this ?

Answers

Answer:

Nitrogen

Explanation:

According to the Periodic Table, the atom with a mass is 16 but the Atomic number is 7 for Nitrogen. That means that Nitrogen is an isotope.

What is stoichiometry?​

Answers

(chemistry) the relation between the quantities of substances that take part in a reaction or form a compound (typically a ratio of whole integers)

Answer:

hope it help u !!!!

Explanation:

Stoichiometry is the relationship between the relative quantities of substances taking part in a reaction or forming a compound, typically a ratio of whole integers

Write the nuclear equation for the beta decay
of calcium-45.

Answers

Answer:

on https://www.ck12.org/book/peoples-physics-concepts/section/20.1/

Explanation:

it shows for calcium 45 and maybe a possible equation on 3/4th's scroll down?

what is an earthquake's epicenter found​

Answers

Answer:

an epicenter is where an earthquake first hit

Answer:

The epicenter

Explanation:

The location below the earth's surface where the earthquake starts is called the hypocenter, and the location directly above it on the surface of the earth is called the epicenter. ... These are smaller earthquakes that occur afterwards in the same place as the mainshock.

What are 3 things that
happen to your body when you start exercising
regularly?

Answers

Explanation:

Weight loss and weight maintenance.

Muscle gain.

Improved mood.

Improved heart health.

improved mood
improved heart health
muscle gain
weight loss and weigh maintenance
improved brain function and reduces the risk of dementia
improved your immune system
better sleep




just pick 3

The table below gives some characteristics of element Y.

Characteristics of element Y Values
Mass number 11
Number of neutrons in a single atom 6
Average atomic mass (grams/mole) 10.81

What is the identity of element Y?

Answers

Answer:

Boron B

Explanation:

According to the periodic table, Boron is the element with atomic mass of approximately 11 [i.e 10.81]

To calculate Neutrons

Neutrons = Mass number - Protons

Number of protons in Boron is same as atomic number which is 5

Thus, N = 11 - 5 = 6

Which gas is produced when a carbonate undergoes thermal decomposition

Answers

Answer:

carbon dioxide gas

Explanation: This type of reaction is called a thermal decomposition. This reaction is very common in where carbon dioxide gas makes Products rise..

There are many factors that influence the population changes of an ecosystem. Which of these does not influence population size in an ecosystem? A. Birthrates of animals B. An animal's weight C.Number of animals in habitats D.Number of animals in habitats

Answers

Answer:

B. An animal's weight

Explanation:

An animal's weight is the factor that does not influence population size in an ecosystem because this factor does not cause an increase or decrease the population of animals in an ecosystem. The birth and death rate of animals and number of animals in habitats are the factors that tells us about the increase and decrease in the population of organisms in an ecosystem but weight of organism can't affect the population.

Answer:

B. An animal's weight

Explanation:

Population growth is based on four fundamental factors: birth rate, death rate, immigration, and emigration.

Most terrestrial plants are members of this Division:

Bryophyta

Angiosperms

Pinophyta

Pteridophyta

Answers

Answer:

most flowering plants are classified as angiosperms

Answer:

I think the answer is Bryophyta

Explanation:

seedless,non vascular plants that are the closest extant relative of early terrestrial plants

The chemical reaction
2 H2 +O2 → 2 H20 is a:
a. synthesis reaction
b. decomposition reaction
c. single displacement reaction
d. double displacement reaction
e. combustion reaction

Answers

Answer:

double displacement reaction

A child sits on a partially filled balloon and decreases the volume by half. What happens to the pressure inside of the balloon?
It increases

It decreases

It stays the same

Answers

Answers to the whole assignment:

**Check for proof photos at the bottom.**

**Answers are in bold.**

__________________________________________________________

A child sits on a partially filled balloon and decreases the volume by half. What happens to the pressure inside of the balloon?

A. It increases

For the same balloon, how does the density inside the balloon change?

A. increases

A scientist takes a small, partially inflated balloon out of liquid nitrogen (at a very low temperature). As the balloon rests on the table, it begins to grow in size. Which statement(s) best explains why the balloon grows?

B. The air warms and increases particle movement. Increased particle movement leads to increased volume.

C. Increased temperature means increased volume as long as the container is flexible.

__________________________________________________________

Answer the following questions with or without using a calculator.  

A balloon contains 1.00 mol helium gas at STP. What will the volume of the balloon be if the pressure increases to 2.00 atm?  

✔ 11.2 L

A syringe contains 0.10 mol neon gas at STP. What volume does the syringe indicate?  

✔ 2.24 L

A chemist adds 0.10 mol argon gas to the syringe. The pressure and temperature remain constant. What will be the volume on the syringe after the argon is added?  

✔ 4.48 L

__________________________________________________________

Acetylene gas (C2H2) reacts with oxygen gas (O2) to produce carbon dioxide (CO2) and water vapor (H2O). How many liters of C2H2 are required to produce 75.0 L of CO2?

37.5  L

What volume of H2O is produced?

37.5  L

What volume of O2 is required?

93.8  L

When making the calculations, did you need to find the number of moles?  

✔ no

Liquid carbon disulfide (CS2) reacts with 44.8 L O2 gas to produce the gases carbon dioxide (CO2) and sulfur dioxide (SO2).  

What is the mass of carbon dioxide produced?

29.3  g

What is the mass of sulfur dioxide produced?

85.4  g

When making the calculations, did you need to find the number of moles?  

✔ yes

__________________________________________________________

Explanation:

The child is putting pressure on the balloon, and squishing particles together when he/she sits on it, thus increasing pressure. Since particles are being squished closer together, density also increases.

Inflated objects will grow in size when the air inside is hotter. This is because particles move more rapidly. An example would be bike tires being more inflated under hot conditions.

One mole of any gas at standard temperature and pressure (STP) will occupy 22.4 L. If pressure increases, the volume decreases, and vice versa. If moles decreases, so will the volume, and vice versa.

Here are photos of Edge just incase.

The pressure inside of the balloon will Increase. Hence The correct option is (A).

What is Boyle's Law ?

According to this law, the pressure (p) of a given quantity of gas varies inversely with its volume (v) at constant temperature; i.e., in equation form,

pv = k

Where K = constant.

Initial pressure = P₁Initial volume = V₁Final pressure =P₂Final volume = V₂

If we consider that temperature of the gas which filled inside the balloon is constant.

We know that , at constant temperature

P₁V₁ = P₂V₂

Given that

V₂ = V₁ / 2

P₂ = P₁V₁/V₂

P₂ = P₁V₁/V₁/2

P₂ = 2P₁

Therefore, the pressure inside the balloon will become double.Hence The correct option is (A).

Learn more about Gas Law here ;

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What is the pH of a solution whose H + concentration is 4.0 10 –9?

Answers

Answer:

he pH of a solution is defined as the negative log10 [H+] ... 1 x 10-11. 11. Acidic Solution. 1 x 10-4. 4. 1 x 10-10. 10. 1 x 10-5. 5. 1 x 10-9.

Explanation:

m

Vierte dos líquidos en una pendiente. No sabes qué tipo de sustancias son y necesitas saber cuál es más viscosa. La única herramienta que tienes es un cronómetro. ¿Qué puedes hacer para solucionar este problema?

Answers

Answer:

La respuesta está en la explicación

Explanation:

La viscosidad se puede definir como la resistencia al movimiento que presenta un líquido.

Al verter dos líquidos por separado en una pendiente, podrás ver cómo un líquido se tardará más en llegar al final de la pendiente que el otro. Este líquido será EL MÁS VISCOSO.

Así podrás, con el cronómetro, medir el tiempo que cada líquido se tarda en llegar a cierto punto de la pendiente, EL QUE TARDE MÁS SERÁ EL MÁS VISCOSO.

Calculate the mols for 4.2g of a Mg

Answers

Answer:

0.175mol

Explanation:

Mole of a substance can be calculated using the formula as follows:

number of moles (n) = mass (m) ÷ molar mass (MM)

According to this question, there are 4.2g of Magnesium (Mg).

Molar mass of Magnesium = 24g/mol, hence, the number of moles of 4.2g of Mg is as follows:

n = 4.2g ÷ 24g/mol

n = 0.175mol

Describe the method to make pure, dry crystals of magnesium sulfate from a metal oxide and dilute acid.

Answers

Answer:

H2SO4(aq) + MgO(s) → H2O(l) + MgSO4(aq)

Explanation:

We must recall that the oxides of metals are bases. These metal oxides can react with dilute acids to yield salt and water.

Bearing that in mind, we want to obtain magnesium sulfate from a metal oxide and dilute acid.

In this case we need magnesium oxide and dilute sulphuric acid. The reaction occurs as follows;

H2SO4(aq) + MgO(s) → H2O(l) + MgSO4(aq)

I would appreciate some help please ᕕ( ᐛ )ᕗ
3KOH + FeCl3 → Fe(OH)3 + 3KCl
How many grams of KOH are needed to produce 0.500 moles of KCl?

Answers

Answer:

dont know, will let uk in 2 mins

Explanation:

Explanation:

hope this helps you to understand:)

HELP ASSAP!!
The molecule shown is an example of a

A)

methyl ester.

B)

wax.

C)

triglyceride.

D)

sodium carboxylate.

Answers

Answer:   b

Explanation:

The molecule is WAX.

What is WAX?

Waxes consist of long-chain fatty acid attached through ester oxygen to long-chain alcohol. These molecules exist completely water-insoluble and typically solid at biological temperatures.

The main objective of the waxes is to provide a water-proof layer to the feathers, but other processes have also been suggested. Some of these lipids can also recreate a role as pheromones in sexual signaling.

the characteristics of wax are-

1. Solid at room temperature; liquid at more increased temperatures.

2. Primarily hydrocarbon in design.

3. Water repellent; insoluble in water.

4. Smooth texture; buffable under slight pressure.

5. Low toxicity; low reactivity.

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The atoms of elements A (blue) and B (orange) form 2 compounds shown here. Do these compounds obey the law of multiple proportions?

Answers

Hello. You have not presented the image that presents the two elements mentioned in the question. This makes it impossible for your question to be answered. However, I will try to help you as best I can.

To say whether the compounds obey the law of multiple proportions, you should observe whether one of the elements, formed from the compounds, maintains a fixed mass, while the other element presents the mass in a varied amount of small, whole numbers, spread across the formed compounds .

This is because the law of multiple proportions states that an element must have a fixed mass when reacting with another element to create compounds. This reaction will allow this element to keep the mass fixed, while the other element will generate different compounds, where each one presents a part of the mass of the forming element, in small and whole numbers.

Why can you not create a Punnett square
to determine the height of an individual-​

Answers

You can use a punnet square to determine if an indevidual will be tall, average or short.
Mark Brainliest please

Limitations of Punnett squares as models of inheritance include the lack of information about likely variation in small samples such as individual families and the lack of information about population prevalence of parental genotypes (so no predictions can be made about population prevalence of offspring genotypes


What makes up a compound

Answers

Answer:

Elements make up a compound.

Two sentences conjoined by a conjunction word

What does every weak base have? ​

Answers

Explanation:

has a Acids Bases

HCl LiOH

HBr NaOH

HI KOH

HNO 3

How does a scientist make two solutions with the same molarity?
O A. By dissolving the same number of moles of each substance in the
same volume of water
B. By dissolving the same number of grams of each substance in the
same volume of water
C. By dissolving the maximum amount of each substance in the
same volume of water
D. By dissolving 1 mole of each substance in enough water to make
sure dissolving is complete

Answers

Answer:

a

Explanation:

It's a duh

I have an atomic number of 56 who am i?

Answers

Answer:

You are Barium

Explanation:

Have a great summer :)

Answer:

Barium

hope this helps

have a good day :)

Explanation:

How do protons and neutrons stay together in a nucleus?
A Electrostatic forces hold them together
B. Gravitational forces hold them together
C Weak nuclear forces hold them together
D. Strong nuclear forces hold them together

Answers

Answer:

strong nuclear forces that hold them together

the pH of orange juice is 4.0. what is the hydrogen ion concentration in orange juice ASAP PLEASE

Answers

pH = 4

- log[H+]= 4

[tex][H+] = {e}^{ - 4} [/tex]

[tex][H+] = 54.6[/tex]

The pH of orange juice 4. The concentration of hydrogen of [tex]10^{-4}[/tex].

What is pH

The pH scale, which originally stood for "potential of hydrogen," is being used to describe the acidity or alkalinity of aqueous solutions.

Calculation of concentration of hydrogen ion by using pH formula.

It can be calculated by using the formula.

pH = -log[[tex]H^{+}[/tex]].

[[tex]H^{+}[/tex]] = [tex]10^{-pH}[/tex]

[[tex]H^{+}[/tex]] = [tex]10^{-4}[/tex]

Therefore, the concentration of hydrogen ion  by using pH formula will be    [tex]10^{-4}[/tex].

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What is the physical state of nitrogen at -200c

Answers

Nitrogen, for example, is a gas that liquefies at about −200° C and freezes around −210° C, whereas bismuth is a solid melting at 271° C and boiling at about 1,560° C.

1. What is the volume of 4.00g of aluminum at STP?

Answers

Answer:

22.4cm³

Explanation:

Avogadro's law shows that Avogadro's volume is 22.4

La aparición del microscopio ha permitido la creación de nuevas áreas de estudio, tanto en la___________________________

Answers

Answer:

En la mejora de la investigación y la medicina.

Explicación:

La aparición del microscopio ha permitido la creación de nuevas áreas de estudio, tanto en la mejora de la investigación como en la medicina. La invención del microscopio nos permite crecer y desarrollarnos en el campo de la investigación y el estudio. Con este microscopio, los científicos pudieron descubrir la estructura de la célula, así como las partículas subatómicas que están presentes dentro del átomo. Gracias a este microscopio, los científicos pudieron crecer y desarrollarse en el campo de la creación de nuevos medicamentos.

Heterogéneo de tres fases y un componente.

Answers

Un sistema heterogéneo de 3 fases y 1 componente puede ser:



Sólido (hielo)
Líquido (agua)
Gaseoso (vapor)
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