What is the mass of 61.9 L of oxygen gas collected at STP?
a 122 g 02
b 2.76 g 02
C 88.4 g 02
d 44.2 g 02

Answers

Answer 1

Answer:

D. 44.2 g O₂

General Formulas and Concepts:
Gas Laws

STP (Standard Conditions for Temperature and Pressure) = 22.4 L per mole at 1 atm, 273 K

Stoichiometry

Dimensional AnalysisMole Ratio

Explanation:

Step 1: Define

Identify given.

61.9 L O₂ at STP

Step 2: Convert

We know that the oxygen gas is at STP. Therefore, we can set up and solve for how many moles of O₂ is present:

[tex]\displaystyle 61.9 \ \text{L} \ \text{O}_2 \bigg( \frac{1 \ \text{mol} \ \text{O}_2}{22.4 \ \text{L} \ \text{O}_2} \bigg) = 2.76339 \ \text{mol} \ \text{O}_2[/tex]

Recall the Periodic Table (Refer to attachments). Oxygen's atomic mass is roughly 16.00 grams per mole (g/mol). We can use a mole ratio to convert from moles to grams:

[tex]\displaystyle 2.76339 \ \text{mol} \ \text{O}_2 \bigg( \frac{16.00 \ \text{g} \ \text{O}_2}{1 \ \text{mol} \ \text{O}_2} \bigg) = 44.2143 \ \text{g} \ \text{O}_2[/tex]

Now we deal with sig figs. From the original problem, we are given 3 significant figures. Round your answer to the exact same number of sig figs:

[tex]\displaystyle 44.2143 \ \text{g} \ \text{O} \approx \boxed{ 44.2 \ \text{g} \ \text{O}_2 }[/tex]

∴ our answer is letter choice D.

---

Topic: AP Chemistry

Unit: Stoichiometry

What Is The Mass Of 61.9 L Of Oxygen Gas Collected At STP?a 122 G 02b 2.76 G 02C 88.4 G 02d 44.2 G 02
What Is The Mass Of 61.9 L Of Oxygen Gas Collected At STP?a 122 G 02b 2.76 G 02C 88.4 G 02d 44.2 G 02

Related Questions

What is the pH of a solution if the pOH is 7.09?

Answers

Answer:

pH = 6.91

Explanation:

Recall that at 25 °C, we have the relationship:

[tex]\displaystyle \text{pH} + \text{pOH} = 14.00[/tex]

Therefore, the pH of a solution with a pOH of 7.09 is:


[tex]\displaystyle \begin{aligned} \text{pH} + (7.09) & = 14.00 \\ \\ \text{pH} & = 6.91 \end{aligned}[/tex]

A drinking glass and a tightly sealed jar sit on the kitchen counter. both are half-filled with water and are undisturbed for several hours. will the liquid and water vapor establish equilibrium in either container? explain your answer

Answers

A tightly sealed jar will form liquid and water equilibrium but the drinking glass will not.

Will the liquid and water vapor establish equilibrium in either container?

The liquid and water vapor establish equilibrium in a tightly sealed container but not in the drinking glass because in the tightly sealed jar, the water can't go into the atmosphere but in the drinking glass the water will evaporate.

So we can conclude that a tightly sealed jar will form liquid and water equilibrium but the drinking glass will not.

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what happens when you mix hydrogine, potassium and sodium

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Answer:

-

Explanation:

As the piece of metal skitters across the surface of the water in a beaker and — particularly in the case of potassium — it appears to catch fire, it is not obvious that the explanation for both phenomena lies in the production of hydrogen gas.

how do you complete chemical equations?
Ca+O2 →

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[tex]2\text{Ca} + \text{O}_2 \rightarrow 2\text{CaO}[/tex]

According to Newton's second law of motion, a larger force acting on an object causes a greater(..................................) of that object

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Answer:

acceleration

learnt this in 8th grade

acceleration

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F proportional to m and a

F > than a >

In the space below draw a model of the atoms that make up a water molecule to show the charges of each of these atoms chemistry

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Answer:

I didn't draw this but I think they're asking you to draw this

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What kinds of solute particles are present in water solutions of electrolytes and no electrolytes?

Answers

Ion particles are present in water solutions of electrolytes while neutral molecules are present in case of non electrolytes.

What are electrolytes?

Electrolytes are compounds that dissociate into ions when dissolved in a solution, resulting in the solution becoming conductive to electricity. These substances are usually made up of ionic compounds or acids that dissolve in water, producing positively and negatively charged ions. These ions can move freely within the solution and transport electric charge, thereby transforming the solution into a conductor of electricity.

What type of solute particles exist in water solutions of electrolytes?

When we talk about water solutions of electrolytes, it's important to note that the solute particles are present in the form of ions. These ions are essentially atoms or molecules that have a net electric charge as a result of gaining or losing electrons. The presence of these charged particles allows for conductivity within the solution, making them capable of carrying an electric charge. Some common examples of electrolytes include table salt (also known as sodium chloride), acids, and bases.

What type of solute particles exists in water solutions of non electrolytes?

When it comes to solutions in water that contain non-electrolytes, the solute particles are made up of neutral molecules or compounds that lack an overall electric charge and therefore, cannot facilitate electrical conductivity within the solution. Sugar, alcohol, and urea are a few examples of non-electrolytes.

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7
10 points
how many moles of nitrogen gas will occupy a volume of 0.347 l at 7.0 atm and 300 k?
"do not include a unit with your answer, just type in the number!
type your answer..
previous

Answers

Answer:

.0987 moles

Explanation:

Ideal gas law     PV = n RT       R = .082057 L-atm/mol-K

7 ( .347) = n (.082057) (300)       n = .0987 moles

Suppose much of an old forest will be used for farmland. A certain portion of the land will be set aside as wildlife habitat. You are asked to chose between the two plans outlined in A and B. The green areas represent the proposed reserve areas. Which plan will you recommend? Explain your reasoning.

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Answer:

A certain portion of the land will be set aside as wildlife habitat

Select the correct answer. which element can bond with titanium (ti) to form a polar covalent bond? a. beryllium (be) b. fluorine (f) c. manganese (mn) d. nitrogen (n) e. oxygen (o)

Answers

The element that can bond with titanium (Ti) to form a polar covalent bond is Nitrogen (N).

What is a Covalent Bond?

In this type of bond, the atoms of the element share only one electron. As an example, we can mention the chlorine gas Cl2, in which the two chlorine atoms share an electron to achieve chemical stability.

Hence, we can see that to bond with Titanium, there needs to be an element that would form a polar covalent bond and this is Nitrogen and this is because of their electronegativity difference.

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Explain how each property affects the energy in a wave:
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Answers

Answer:

frequency

Explanation:

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a. 320 mL

b. 948 mL

c. 1834 mL

d. 3267 mL


4. Convert these volumes to milliliters:

a. 0.75 L

b. 0.28 L

c. 1.32 L

d. 2.4 L

Answers

3. a) 320 mL x 1 L/1000 mL = 0.320 L
b) 948 mL x 1 L/1000 mL = 0.948 L
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Answers

Answer:

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Answers

2H_2+O_2—»2H_2O

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Moles of Hydrogen

30u/1u30mol

Moles of O_2

30/215mol

[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]

Let's get to the reaction first ~

[tex] \qquad \qquad \rm 2H_2 + O_2 \rightarrow 2H_2O[/tex]

Here, we can infer that if we need 1 mole oxygen gas to react with 2 moles Hydrogen gas.

So, the number of Oxygen gas molecules we need to react should be half the number of Hydrogen gas molecules.

Number of Hydrogen gas molecules is :

[tex]\qquad \sf  \dashrightarrow \: \dfrac{30}{2} [/tex]

[tex]\qquad \sf  \dashrightarrow \: 15[/tex]

Number of Oxygen gas molecules needed is :

[tex]\qquad \sf  \dashrightarrow \: \dfrac{15}{2} [/tex]

Number of Oxygen atoms needed :

[tex]\qquad \sf  \dashrightarrow \: \dfrac{15}{2} \times 2[/tex]

[tex]\qquad \sf  \dashrightarrow \: {15} \: atoms[/tex]

One atom of Oxygen weight 16 u, so 15 atoms weight ~

[tex]\qquad \sf  \dashrightarrow \: {15} \times 16[/tex]

[tex]\qquad \sf  \dashrightarrow \: 240 \: u[/tex]

So, we need 240 u of Oxygen atoms to react completely with 30 u of Hydrogen atoms.

Balance the following reactions:'

Mg(OH)2 + HCl ➡️ H2O + MgCl2

Ca(ClO3)2 ➡️ CaCl2 + O2


Ca(NO3)2 + ➡️ KBr CaBr2 + KNO3

Al + HCl ➡️ AlCl3 + H2

C2H6 + O2 ➡️ CO2 + H2O

Answers

[tex]2 HCl + Mg(OH)_2[/tex] → [tex]2 H_2O + MgCl_2[/tex]

[tex]3 Ca(ClO)_2[/tex] → [tex]2 CaCl_2[/tex] + [tex]Ca(ClO_3)_2[/tex]

[tex]2 KBr + Ca(NO_3)_2[/tex] →[tex]2 KNO_3 + CaBr_2[/tex]

[tex]2Al +6HCl[/tex] → [tex]2AlCl_3 +3H_2[/tex]

[tex]2C_2H_6+7O_2[/tex] → [tex]4CO_2+6H_2O.[/tex]

What is a balanced chemical equation?

A balanced chemical reaction is an equation that has equal numbers of each type of atom on both sides of the arrow.

Balanced chemical equation:

[tex]2 HCl + Mg(OH)_2[/tex] → [tex]2 H_2O + MgCl_2[/tex]

[tex]3 Ca(ClO)_2[/tex] → [tex]2 CaCl_2[/tex] + [tex]Ca(ClO_3)_2[/tex]

[tex]2 KBr + Ca(NO_3)_2[/tex] →[tex]2 KNO_3 + CaBr_2[/tex]

[tex]2Al +6HCl[/tex] → [tex]2AlCl_3 +3H_2[/tex]

[tex]2C_2H_6+7O_2[/tex] → [tex]4CO_2+6H_2O.[/tex]

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Describe polar and nonpolar molecules

Answers

Answer:

Polar molecules occur when there is an electronegativity difference between the bonded atoms. Nonpolar molecules occur when electrons are shared equal between atoms of a diatomic molecule or when polar bonds in a larger molecule cancel each other out.

Explanation:

hope it's helps

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Answers

From the Dalton's law of partial pressures, the pressure of the hydrogen gas is 91.83 kPa.

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In this case, the partial pressure of the hydrogen gas is Phydrogen, the partial pressure of water is Pwater and the total pressure is PT.

Hence;

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A reaction between an alcohol and an organic acid is classified as.

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Answer:

esterification reaction ...........

What is the IUPAC name

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Answers

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Explanation:

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a.
NaCl
c.
C6H12O6
b. MgCl₂
d.
K3PO4

Answers

Answer:

D. K3PO4

Explanation:

K3PO4 would dissolve into 3 potassium ions and one phosphate ions thus total of 4 items added in water. Freezing point is depressed by high amounts of stuff. NaCl would add 2 items (one Na and one Cl). Glucose would not break apart, thus 1 item. MgCl2 would break into One Mg and two Cl ions (thus 3 things.)..

Overall, K3PO4 dissolves into most components, thus would depress the freezin point most.

David runs a 100-m dash while pushing a stroller with a force of 25N. What amount of work does David do on the stroller?

Answers

David runs a 100-m dash while pushing a stroller with a force of 25N.  The work done by David is 2500 Nm.

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Force is a power that changes the motion of the object.

The displacement is 100 m

The force is 25 N

Work done = force x displacement

25 x 100 = 2500 Nm

Thus, the work done by David is 2500 Nm.

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Body systems often interact with each other. The image below shows parts of body systems that interact to fulfill a function for the body.



Which statement describes how the body systems in the image work together to perform a common function

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According to the research, the body systems work together to perform a common function through the coordination of endocrine substances and nerve impulses.

What are the body systems?

They are the different sets of organs that make up the body, collaborating in each case with the fulfillment of some specific type of functions.

This simultaneous and juxtaposed set of systems involves various organs, ducts, tissues and various glands, all coordinated by endocrine substances and nerve impulses, so as to operate more or less autonomously as the case may be.

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formation of water: 2H2 + 1 O2 --> 2H2O
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Answers

Answer:

2.2 moles H2O

Explanation:

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Answers

The color of the indicator will correspond to the pH values of either acidic or basic substances.

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pH values are values which are obtained from taking the negative logarithm to base ten of the hydrogen ions concentration of a substance.

pH values of acidic substances are less than 7 while the pH of basic or alkaline substances are greater than 7.

An indicator is an organic dye which changes colour according to the pH of a substance.

Examples of indicators are methyl orange and phenolphthalein.

Therefore, the color of the indicator will correspond to pglh values of either acidic or basic substances.

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what is 750 grams of phosphorus

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Answer:

750 g of phosphorus is 750 g of phosphorus

Reduction is a reaction that uses________to change a molecule into something else.

Answers

Answer:

chemical reaction

Explanation:

Reduction is the transfer of electrons between species in a chemical reaction where there is a process of gaining electrons or a decrease in the oxidation state by an element. A reduction chemical reaction involves increasing electrons associated with a single atom or a group of atom

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Answers

The error in the student's reasoning happened as they get confused between the beta minus decay and beta plus decay.

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A neutron is converted into a proton in beta minus, increasing the atomic number of the atom.

The proton is positive, while the neutron is neutral. The nucleus also produces an electron and an antineutrino in order to ensure charge conservation.

In the given question beta minus decay is not occur as atomic number of the daughter nuclei does not increases. Rather than this in the given decay atomic mass of the daughter nuclei is less than the parent nuclei means plus beta decay is happened there.

Hence the error is in predicting the correct particle with charge.

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If 100.0g of nitrogen is reacted with 100.0g of hydrogen, what is the excess reactant? What is the limiting reactant? Show your work.

Answers

Compare the number of moles you have of each element. The element with more moles will be the excess reactant since some will be leftover after it reacts with the limiting reactant.

Which organisms are producers?

Choose all correct answers.


tree

grass

monkey

mold

Answers

Answer: Tree and Grass are the two correct answers here

Explanation:  Producers are photosynthesizing organisms. They are any kind of green plant that make their food by taking sunlight and using the energy to make sugar.

Answer:

Tree, grass

Explanation:

Producers make their own food. Trees and grass can make their own food using sunlight (photosynthesis). Monkey is consumer (eats other things like bananas- made by plants - for survival). Mold (like fungus) eat dead stuff and thus are decomposers (not producers).

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