Calculate the percentage by mass in each element
N in NH3

Answer:

Molarity = 0.154 M

Explanation:

Given data:

Volume of solution = 8.42 × 10² mL ( 8.42 × 10² /1000 = 0.842 L)

Mass of potassium iodide = 22.4 g

Molarity of solution = ?

Solution:

Number of moles of potassium iodide:

Number of moles = mass/molar mass

Number of moles = 22.4 g/ 166.0 g/mol

Number of moles = 0.13 mol

Molarity:

Molarity = number of moles / volume in L

Molarity = 0.13 mol / 0.842 L

Molarity = 0.154 M

a. 30 moles of H₂O

b. 2.33 moles of N₂

Given

a. 20 moles of NH₃

b. 3.5 moles of O₂

Required

a. moles of H₂O

b. moles of N₂

Solution

Reaction

4NH₃+3O₂⇒2N₂+6H₂O

a. From the equation, mol ratio NH₃ : H₂O = 4 : 6, so mol H₂O :

=6/4 x mol NH₃

= 6/4 x 20 moles

= 30 moles

b. From the equation, mol ratio N₂ : O₂ = 2 : 3, so mol N₂ :

=2/3 x mol O₂

= 2/3 x 3.5 moles

= 2.33 moles

The moles of H₂O produced by 20 moles of NH₃ are 30 moles, moles of N₂ produced by 3.5 moles of O₂ is 2.3 moles.

Moles is a unit of mass, which gives information about the relative amount of species present in any reaction.

Given chemical reaction will be represented as:
4NH₃ + 3O₂ → 2N₂ + 6H₂O

From the stoichiometry of the reaction it is clear that-

4 moles of NH₃ = produce 6 moles of H₂O

20 moles of NH₃ = produce 6/4×20=30 moles of H₂O

Again from the stoichiometry of the reaction it is clear that-

3 moles of O₂ = produce 2 moles of N₂

3.5 moles of O₂ = produce 2/3×3.5=2.3 moles of N₂

Hence required moles are 30 moles of H₂O and 2.3 moles of N₂.

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Answer:

:)

Explanation:

They are all properties of Matter. weight and formula wouldn't make sense.

Answer:

Evolution is the process by which populations of organisms change over generations. Genetic variations underlie these changes

Explanation:

If a trait is advantageous and helps the individual survive and reproduce, the genetic variation is more likely to be passed to the next generation.

Brain-List?

Answer:

the water underwent a physical change. This is because the water simply changed states, and could become liquid again, but it will remain H20 throughout the time

Answer:

The energy can be released as one quantum of energy, as the electron returns to its ground state (say, from n = 5 to n = 1), or it can be released as two or smaller quanta as the electron falls to an intermediate state, then to the ground state (say, from n = 5 to n = 4, emitting one quantum, then to n = 1,

Answer:

[tex]Cl_{2} +2NaBr ---> 2NaCl + Br_{2}[/tex]

Explanation:

4.70 × 10²⁴ atoms Ge

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Step 1: Define

7.80 mol Ge

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

[tex]\displaystyle 7.80 \ mol \ Ge(\frac{6.022 \cdot 10^{23} \ atoms \ Ge}{1 \ mol \ Ge} )[/tex] = 4.69716 × 10²⁴ atoms Ge

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

4.69716 × 10²⁴ atoms Ge ≈ 4.70 × 10²⁴ atoms Ge

Answer:

There are 15 grams of copper chloride in 50 cubic centimeters of solution.

Explanation:

The statement is incorrect. The complete sentence will be presented below:

What is the mass of cooper chloride in 50 cubic centimeters of a 300 grams per cubic decimeters?

In Chemistry, a common unit for concentration is grams per cubic centimeter. A cubic decimeter equals 1000 cubic centimeters. First, we convert the given concentration into the requested unit:

[tex]c = 300\,\frac{g}{dm^{3}} \times \frac{1\,dm^{3}}{1000\,cm^{3}}[/tex]

[tex]c = 0.3\,\frac{g}{cm^{3}}[/tex]

Which means there are 0.3 grams of copper chloride per each cubic centimeter of solution.

The amount of mass of copper chloride contained in 50 cubic centimeters of solution is calculated by dimensional analysis:

[tex]m = \left(0.3\,\frac{g}{cm^{3}} \right)\cdot (50\,cm^{3})[/tex]

[tex]m = 15\,g[/tex]

There are 15 grams of copper chloride in 50 cubic centimeters of solution.

Explanation:

6/t1=4/293= 1750/4 =439.5-273=166.5

Answer:

%composition of B₂ = 4.3%

%composition of Br₆ = 95.7%

Explanation:

Given data:

Percent composition of B₂Br₆ = ?

Solution:

Total mass of B₂Br₆ = 10.8×2 + 79.9×6 = 501 g/mol

%composition of B₂ = ( 21.6 g/ 501 g ) × 100

%composition of B₂ = 0.043 × 100

%composition of B₂ = 4.3%

%composition of Br₆ = ( 479.4 g/ 501 g ) × 100

%composition of Br₆ = 0.957 × 100

%composition of Br₆ = 95.7%

Explanation:

T1/V1 = T2/V2

V2 = T2 x V1/T1

V2 = 296.15x535/319.15

V2 = 496.44mL

Answer: polar molecule.

Explanation:

The boiling point is the temperature at which the vapor pressure of a liquid equals the external pressure surrounding the liquid. The boiling point is dependent on the type of forces present.

Iodine monochloride (ICl) is a polar molecule due to the difference in electronegativities of iodine and chlorine. Thus the molecules are bonded by strong dipole dipole forces. Thus a higher temperature is needed to generate enough vapor pressure.

Bromine [tex](Br_2)[/tex] is a non polar molecule as there is no electronegativity difference between two bromine atoms. The molecules are bonded by weak vanderwaal forces and thus has low boiling point.

Answer:

thank you :')

Explanation:

Answer:

Aw and thank you!

Explanation:

Even though you said I am loved, you are loved very much too! Don't you ever forget that! No matter what happens and how you feel remember that you are loved and mean so much to people. What you said to me means a lot to me! Thank you! YOU ARE LOVED!!

Answer:The answer is 3.33%. Anna reduced her CO2 emissions by 3.33% from using 600 gallons of gas annually than from using 900 gallons of gasoline annually.

Explanation:

Answer:

Synthetic fibers are made from synthesized polymers of small molecules. The compounds that are used to make these fibers come from raw materials such as petroleum-based chemicals or petrochemicals. These materials are polymerized into a chemical that bonds two adjacent carbon atoms.

Answer:

Economic activity: Activities that are related to the production and consumption of goods in return for money. The main motive is to earn money.

The economic activities are:

Primary activity: these are related to the extraction of natural resources.

Secondary activity: these are related to the processing of raw materials.

Tertiary activity: these are related to providing services.

Answer:

Explanation:

The new volume of the balloon can be found by using the formula for Boyle's law which is

[tex]P_1V_1 = P_2V_2[/tex]

Since we are finding the new volume

[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]

From the question we have

[tex]V_2 = \frac{1 \times 1}{0.4} = \frac{1}{0.4} \\ = 2.5[/tex]

We have the final answer as

Hope this helps you

Answer:

nucleic acids yw

Explanation:

Answer:

nucleic acids

Explanation:

edg

Answer:

La masa molar de la sustancia disuelta es de aproximadamente 138,473 g/mol

Explanation:

Los parámetros dados son;

La masa de benceno en el recipiente = 100 gramos

La masa de benceno que se evapora del benceno puro = 1.273 gramos

La masa del soluto no volátil disuelto en 100 gramos de benceno = 10 gramos

La masa de benceno que se evapora de la mezcla = 1.205 gramos

Según la ley de Raoult, tenemos;

[tex]P_ {solucion} = P_ {solvente} \times X _ {solvente}[/tex]

Dónde;

[tex]P_ {solucion}[/tex] = La presión de vapor de la solución.

[tex]P_ {solvente}[/tex] = La presión de vapor del solvente

[tex]X_ {solvente}[/tex] = La fracción molar del solvente

Por lo tanto;

[tex]X_ {solvente} = \dfrac {P_ {solucion}} {P_ {solvente}}[/tex]

Según la ley de los gases ideales, tenemos;

[tex]P \times V = n \times R \times T = \dfrac{m}{M} \times R \times T[/tex]

Dónde;

P = La presión del gas

V = El volumen ocupado por el gas

m = La masa del gas

M = La masa molar del gas

R = La constante universal de los gases

T = La temperatura del gas

n = El número de moles del gas

Por lo tanto;

[tex]P = \dfrac{m \times R \times T}{M \times V}[/tex]

Donde R, T, M y V son constantes, tenemos P ∝ m

[tex]\therefore X_ {solvente} = \dfrac {P_ {solucion}} {P_ {solvente}} = \dfrac {Masa \ evaporada \ de \ solucion} {Masa \ evaporada \ de \ solvente} = \dfrac {1.205 \ g} {1.273 \ g} \approx 0.9466[/tex]

[tex]X_ {solvente}[/tex] ≈ 0.9466

[tex]X_ {solvente} = \dfrac {El \ numero \ de \ moles \ del \ solvente} {El \ total \ numero \ de \ moles \ de \ la \ solucion}[/tex]

El número de moles del solvente, C₆H₆ = (Masa de C₆H₆) / (La masa molar de C₆H₆) = 100 g / (78.11 g.mol) ≈ 1.28025 moles

El número de moles del solvente, C₆H₆ ≈ 1.28025 moles

El número total de moles = El número de moles del solvente, C₆H₆ + El número de moles del soluto no volátil, [tex]n_ {soluto}[/tex]

[tex]\therefore X_ {solvente} = 0.9466 = \dfrac {1.28025 \ moles} {1.28025 \ moles + n_ {soluto}}[/tex]

0.9466 × (1.28025 moles + [tex]n_ {soluto}[/tex]) = 1.28025 moles

1.21189 moles + 0.9466 × [tex]n_ {soluto}[/tex] = 1.28025 moles

[tex]n_ {soluto}[/tex] = (1.28025 - 1.21189)/0.9466 moles ≈ 0.07221635 moles

[tex]\therefore \dfrac {Masa \ de \ soluto} {Molar \ masa \ de \ soluto} = \dfrac {10 \ g} {Molar \ masa \ de \ soluto} \approx 0.07221635 \ moles[/tex]

[tex]\ Masa \ molar \ de \ soluto = \dfrac {10 \ g} {0.07221635 \ moles} \approx 138.473 \ g / moles[/tex]

La masa molar de la sustancia disuelta (el soluto) ≈ 138,473 g/mol

Answer:

2. waves

3. True

4. the distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.

5. Frequency is the number of occurrences of a repeating event per unit of time.

6. slow, fast

7. left to right

8. The maximum displacement or distance moved by a point on a vibrating body

9. No

10. radio waves, and microwave.

11. tv uses electromagentic waves while light uses electromagenti radition.

Explanation:

Answer:

Some particles of gas and dust that the planets are made of were too far away from the core of the planet and could not be squashed together by gravity. They remained behind to form the ring system

Explanation:

so in simplier terms yes lol

Answer:

3rd law

Explanation:

Answer:

See explanation

Explanation:

Among all the options listed, only compound (c) is a carbohydrate and it is a  trisaccharide.

Carbohydrates are represented by the formula (CH2O)n, the subscript n denotes the number of carbon atoms in the carbohydrate. Carbohydrates contains carbon, hydrogen and oxygen in the ratio of 1:2:1.

Carbohydrates can have linear structures and cyclic structures. The cyclic structure as in (c) is mostly obtained in solution. All carbohydrates are six carbon sugars linked together at a certain point as in structure (c).

Answer:

its when 1 male, produces a sperm, which them goes to fuse with the sperm from the female.

To solve this we must be knowing each and every concept related to  radioactive isotope. Therefore, the radioactive isotope carbon-14 can be used for determining the age of a sample.

The radioactive isotopes of such an element are called radioisotopes. They are indeed the atoms with an unstable nuclear configuration of protons and neutrons or excess nuclear energy.

A characteristic of both found naturally elements and isotopes created intentionally is radioactive decay. A radioactive element's half-life, or the amount of time it takes for one-half of any specified amount of the isotope to decay, is used to describe the rate of radioactive element decay.  The radioactive isotope carbon-14 can be used for determining the age of a sample.

Therefore, the radioactive isotope carbon-14 can be used for determining the age of a sample.

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