Question 2
3 pts
Which of the following names is correctly matched with the corresponding chemical formula (as
outlined in class)?
*Note: All numbers should be considered as subscripts!
O HCN - formonitrile
NH3 - nitrogen trihydride
HBr = monohydrogen monobromide
SiF4 = silicon tetrafluorine

Answer:

[tex]P_{tot}=465.27torr[/tex]

Explanation:

Hello there!

In this case, according to the given information, it will be possible for us to use the Dalton's law, in order to solve this problem. However, we first need to calculate the mole fraction of oxygen by firstly calculating the moles of each gas:

[tex]n_{H_2}=\frac{14.0g}{2.02g/mol} =6.93mol\\\\n_{N_2}=\frac{84.0g}{28.02g/mol}=3.00mol\\\\n_{O_2}=\frac{64.0}{16.00g/mol} =2.00mol[/tex]

Next, we calculate such mole fraction as follows:

[tex]x_{O_2}=\frac{2}{6.93+3+2} =0.168[/tex]

Then, given the following equation:

[tex]P_{O_2}=P_{tot}*x_{O_2}[/tex]

So we solve for the total pressure as follows:

[tex]P_{tot}=\frac{P_{O_2}}{x_{O_2}} \\\\P_{tot}=\frac{78.00torr}{0.168} \\\\P_{tot}=465.27torr[/tex]

Regards!

Answer:

45 and 20 c2 Or4

Explanation:

Explanation:

nuclear fusion yields more energy than nuclear fission and the products of the reaction are not radioactive

When the two nuclei merge to form a single nucleus is called fusion and the splitting of the nucleus to form two nuclei is called fission.  Fusion can create more energy.

Nuclear fusion and fission are the nuclear reactions that yield energy as the end product. They are different as fusion is the combination of two nuclei and fission is the splitting of the two nuclei.

Fission involves the decay of radioactive substances and formation of the energy. It is used for the formation of nuclear power plants and fusion is involved in the production of the bombs.

Fusion is the more powerful reaction that occurs in the sun and can yield more energy as compared to fission reactions.  It is more advantageous as the radioactive substances are not formed at the end of the reaction.

Therefore, fusion is more powerful than fission.

Learn more about fusion and fission here:

https://brainly.com/question/4767858

Answer:

6.28x10⁻³ g

Explanation:

First we convert 0.1102 grams of CoHg(SCN)₄ into moles, using its molar mass:

There is 1 Co mol per CoHg(SCN)₄ mol, meaning there's also 2.24x10⁻⁴ moles of Co.

We now convert 2.24x10⁻⁴ moles of Co into grams, using its molar mass:

Answer:

[tex]4.8 x 10^{25\\}[/tex] atoms

Explanation:

Use the avogadro number

79.7 moles C x [tex]\frac{6.022 x 10^{23} }{ 1 mole C}[/tex] = [tex]4.8 x 10^{25\\}[/tex] atoms

Answer:

5.59atm

Explanation:

boyles law

P1V1=P2V2

4.65×2.5=P2×(2.5-0.42)

11.625=P2×2.08

P2=5.59atm

Answer:

the solar system should be larger than earth but not larger than the milky way

The universe is made of  billions of galaxies, stars, planets, satellites of these planets dark matter and other small objects. Universe being the largest in the model and then milky galaxy in which the solar system is one component and the smallest in the model is earth.

Galaxy is a group of stars, dust and  dark matter connected with a gravitation pull. The Universe is made of billions of galaxies in which the one which is near to the earth is called milky-way.

There are number of planets in the universe and some of them are not identified yet. The solar system is a group of planets which revolving around the sun.

Earth is one planet in the solar system. Galaxies are bigger than solar system.  Thus in the model earth being the smaller component and solar system smaller than milky way.

Universe be the largest in this model containing all these galaxies, solar system and planets. Hence the options A, B,C and D are correct.

To find more about galaxies, refer the link below:

https://brainly.com/question/24836631

#SPJ2

Answer:

The answers to your questions are given below.

Explanation:

1. The symbol of Zinc is Zn

2. Determination of the proton number

Atomic number is simply defined as the number of protons in the nucleus of an atom. Mathematically, it is expressed:

Atomic number = proton number

Atomic number = 30

Therefore,

Proton number = 30

3. Determination of the neutron number

Mass Number = 65

Proton number = 30

Neutron number =?

Mass number = Proton + Neutron

65 = 30 + Neutron

Collect like terms

65 – 30 = Neutron

35 = Neutron

Thus,

Neutron number = 35

4. Determination of the electron number

Since the element is in it's ground state (i.e it has no charge), thus, the number of protons of the element is the same as number of electrons i.e

Electron number = proton number

Proton number = 30

Thus,

Electron number = 30

Answer:

By taking 18.8 mL of the stock solution and adding about 781.2 mL of water to obtain the desired dilution

Explanation:

Hello there!

In this case, for this dilution problem, it will be possible for us to calculate required volume of the stock NaOH solution by considering that the moles of this solute remain unchanged so we can use the following equation:

[tex]M_1V_1=M_2V_2[/tex]

Whereas the subscript 1 stands for the stock solution and 2 for the dilution. In such a way, we solve for the volume of the former, V1, as shown below:

[tex]V_1=\frac{M_2V_2}{M_1} \\\\V_1=\frac{800.0mL*0.40M}{17.0M}\\\\V_1=18.8mL[/tex]

It means we take 18.8 mL of the stock solution and add about 781.2 mL of water to obtain the desired dilution.

Regards!

Answer:

I am pretty sure that there is 3325.401 formula units. I might be wrong. Hope this helps!

Explanation:

Answer:

[tex]\boxed {\boxed {\sf 0.3 \ mol \ NH_3}}[/tex]

Explanation:

We need to use stiochiometry and a mole to mole conversion to solve this problem.

First, examine the chemical equation. Make sure it is balanced before doing any calculations.

[tex]N_2+3H_2 \rightarrow 2NH_3[/tex]

It is balanced, so we can also use the coefficients to refer to molar amounts.

So, the equation is also saying that 1 mole of N₂ (no coefficient implies 1) and 3 moles of H₂ react to form 2 moles of NH₃.

[tex]1 \ mol \ N_2 + 3 \ mol \ H_2 \rightarrow 2 \ mol \ NH_3[/tex]

Now we can use this information to make a ratio. We know that we have 0.45 moles of hydrogen, and we are trying to find the moles of ammonia.

According to the original equation, 3 moles of hydrogen produce 2 moles of ammonia. Let's make a ratio.

[tex]\frac {3 \ mol \ H_2}{2 \ mol \ NH_3}[/tex]

We have 0.45 moles of hydrogen, so multiply by that number.

[tex]0.45 \ mol \ H_2 *\frac {3 \ mol \ H_2}{2 \ mol \ NH_3}[/tex]

Flip the ratio so the units of moles of hydrogen cancel.

[tex]0.45 \ mol \ H_2 *\frac{2 \ mol \ NH_3 }{3 \ mol \ H_2}[/tex]

[tex]0.45 *\frac{2 \ mol \ NH_3 }{3}[/tex]

[tex]\frac {0.45 *2 \ }{3} mol \ NH_3[/tex]

[tex]\frac {0.9 \ }{3} mol \ NH_3[/tex]

[tex]0.3 \ mol \ NH_3[/tex]

0.3 moles of ammonia are produced when 0.45 moles of hydrogen gas react with nitrogen gas.

Answer:

[HCl] = 14.7M in HCl

Explanation:

Definition of Molarity (M) = moles solute / Liters of Solution

Given 25.0% HCl (aq) => 25g HCl/100g Solution => ? moles HCl/Liter Solution

Convert 25g HCl to moles = moles solute

moles HCl => moles HCl = 25g HCl / 18.015g HCl/mole HCl = 1.387732 mole HCl = 1.4 moles HCl (2sig.figs.)

Determine Liters of Solution as follows:

Given 25% HCl Solution => 25g HCl/100 g Solution

100 g Solution = (100 g solution) /  (1.05 g Solution/ml Solution )

= 95.2381 ml Solution x 1 Liter Solution/1000 ml Solution

= 0.0952 Liters Solution

Apply above mole and volume data to definition of mole.

∴Molarity = moles solute / Liters solution

= 1.4 moles solute (HCl)/0.0952 L solution

= 14.7 Molar in HCl(aq)

Answer: sorry I didnt know the answer it wont let me get off

Explanation:

Answer:

15

Explanation:

Answer:

1.1

0.050*0.005

0.00025

Explanation:

Answer:

aldehyde

Explanation:

Answer:

Ionic bonding is the complete transfer of valence electron

Explanation:

In ionic bonds, the metal loses electrons to become a positively charged cation, whereas the nonmetal accepts those electrons to become a negatively charged anion.

Answer:

A chemical property is any of a material's properties that becomes evident during, or after, a chemical reaction; that is, any quality that can be established only by changing a substance's chemical identity. ... They can also be useful to identify an unknown substance or to separate or purify it from other substances.

Answer:

Path length is the overall distance traveled following the path of where the object travel. ... Displacement is the distance from the starting point of the object to its final point irregardless where it travels.

Answer:

hkdhmfewavs,nxzjrgjngrnjm

Explanation:

Answer:h hed chd dechgde chsxqwertyuioplkjhgfdsaazxcvbnm

Explanation:

Answer: ³²P

Explanation:

The radionuclide in question is known as Phosphorus-32. It is an isotope of Phosphorus that is radioactive and has one more neutron than the normal phosphorus does.

Phosphorus does not exist in nature and is created artificially by bombarding the normal stable phosphorus with neutrons. Due to its radioactive nature, it has proven to be useful in the medical industry where it has been used to detect eye tumors as well as in treating some diseases.

Answer: The correct answer is No solution.

Explanation:

We are given:

Given mass of thiophene for the experiment = 90.00 g

12.3% w/w solution of thiophene

This means that 12.3 g of thiophene is present in 100 g of solution

Applying unitary method:

If 12.3 g of thiophene is present in 100 g of solution

So, 90.00 g of thiophene will be present in [tex]\frac{100g}{12.3g}\times 90.00g=731.7g [/tex] of solution

Converting it into kilograms:

1 kg = 1000 g

So, 731.7 g = 0.7317 kg

As the given amount of solution is 0.50 kg which is less than the required amount.

Thus, there is not enough solution the student should use.

Answer:

A) 1.2%

Explanation:

Answer:

The concentration of an acid in a solution can be determined by making an acid-base titration. To do this, a known volume of the acid solution is gradually added alkali solution whose concentration is known, until a neutral pH is reached.

Explanation:

Answer:

because of how big it is

Explanation:

frgftvtv

The graphs shows the energy change of an exothermic reaction. Hence, the energy of products is less than the energy of reactants. Thus, option c is correct.

The reaction in which heat energy is evolved to the surroundings is called an exothermic reaction. The reaction where, the heat energy is absorbed by the system is called endothermic reaction.

An energy diagram is used to describe the energy change in a reaction and the energy difference between reactants and products. In an endothermic reaction, the reactants are absorbing sufficient energy and thus easily overcome the barrier potential.

In exothermic reactions, products are absorbing energy and overcome the barrier potential. Therefore, in exothermic reactions, the potential energy of products is less than that of reactants as shown in the diagram.

Find more on energy diagram:

https://brainly.com/question/30260225

#SPJ2

Answer:

e. 3

Explanation:

In order to solve this problem we need to keep in mind the definition of pH:

As stated by the problem, the hydrogen ion concentration, [H⁺], is 1x10⁻³ M.

As all required information is available, we now can calculate the pH:

The correct option is thus e.

Answer:

Distance = 154 pm

Explanation:

Given that,

The distance between carbon atoms in diamond is [tex]1.54\times 10^{-8}\ cm[/tex]

We need to find the distance in pm.

We know that,

[tex]1\ pm=10^{-12}\ m[/tex]

[tex]1.54\times 10^{-8}\ cm=1.54\times 10^{-8}\times 10^{-2}\ m\\\\=1.54\times 10^{-10}\ m[/tex]

Multiplying and dividing by 10⁻².

[tex]d=1.54\times 10^{-10}\times \dfrac{10^{-2}}{10^{-2}}\\\\=154\times 10^{-12}\ m\\\\=154\ pm[/tex]

So, the distance is 154 pm.

Answer:

[Pb²⁺] = 2.31x10⁻²¹ M

Explanation:

Let's write the semi reaction for each half cell:

Pb²⁺ + 2e⁻ -----------> Pb(s)     E° = -0.13 V

Mn²⁺ + 2e⁻ ----------> Mn(s)     E° = -1.18 V

As we can see, the E° of Pb is higher than the E° of the Mn, thus, Pb is reducting and Mn is oxidizing:

Pb²⁺ + 2e⁻ -----------> Pb(s)     E°₁ = -0.13 V

Mn(s) ---------> Mn²⁺ + 2e⁻      E°₂ = +1.18 V

E° = E°₁ + E°₂

E° = -0.13 + 1.18 = 1.05 V

Now, we can use the Nerst equation which is:

E = E° - 0.059/n log([Mn²⁺] / [[Pb²⁺])

From here, we just need to replace and then, solve for the [Pb²⁺]:

0.44 = 1.05 - 0.059/2 log(1.1 / x)

0.44 - 1.05 = -0.0295 log(1.1 / x)

-0.61 / -0.0295 = log(1.1 / x)

antlog(20.678) = 1.1 /x

x = [Pb²⁺] = 1.1 / 4.76x10²⁰

Hope this helps