Pls help I will give brainliest

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:

A. Infiltration

B. Ground water discharge

C. Water storage in the ocean

D. Evaporation

E. Condensation

F. Precipitation

G. Runoff

im not sure about A-C

hope this helps

have a good day :)

Explanation:

Three solutions are mixed together to form a single solution. The precipitate in the solution is PbS and PbCl₂.

Precipitates are the residues that are present in the solution. These residues are solid that came out of the solution.

Here given 3 compounds are water-soluble.

From the solution, we have to find the possible combination which is water-soluble.

Consider,

Pb(CH3COO)₂ Pb₂+(aq) + 2CH₃COO-(aq)

Na₂S₂Na+(aq) + S₂-(aq)

LiCl Li+(aq) + Cl-(aq)

Now consider a potential accumulation of positive and negative ions which is water-soluble.

The possible accumulations are,

PbS , PbCl₂

Ca(CH₃COO)₂ , CaS

Now viewing with solubility charge, we can find that both PbS and PbCl2 are water indissoluble and create a precipitate.

But both Ca(CH₃COO)₂ and CaS are water-soluble.

Therefore, the precipitates are PbS and PbCl₂.

To learn more about precipitates, refer to the link:

https://brainly.com/question/20925010

#SPJ2

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:

false im pretty sure.

Answer:

45 and 20 c2 Or4

Explanation:

Answer:

I'd say the plastic particles in the bowl boiled off into the water to make the water cloudy and taste different. While the water boiled in the pot was clearer and tasted no different than regular water

Explanation:

I'm doing the course activity now.

Answer:

Explanation:

molar mass=valency of the element*atomic number

its unit is amu

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:

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 response can be defined as follows:

Explanation:

ATP is a hydrolysis energy-saving money of the cell. It is used to support the cell's endothermic processes.

[tex]ATP\ +\ H_{2}O\ \rightleftharpoons \ ADP\ +\ P_{i}\\\\Q\ = \ \frac{[ADP][P_{i}]}{[ATP][H_{2}O]}\\\\ADP= 0.250 \ M\\\\P_i = 0.010 \ M\\\\ATP = 0.150 \ M\\\\H_2O = 55.55 \ M\\\\\Delta G \ =\ \Delta G^{o}\ +\ 2.303\ RT\ \log\ Q\\\\R = 8.314 \frac{J}{mol\ K}\\\\T = 298\ K\\\\[/tex]

Answer:

Boiling of a liquid

The plateau at the lower temperature represents option A. Boiling of a liquid.

At the time when the heating curve should have two flat line or the plateaus so here the lower temperature shows the boiling of the liquid.

As the first plateau shows the melting and the second plateau shows the boiling.

hence, the option a is correct.

Learn more about temperature here: https://brainly.com/question/22262659

Answer:

Ca - 66%, P - 34%

Explanation:

So, this is the formula we can use to find the amount of each element:

Element count * Atomic mass = Mass

Plug in our elements for this:

Ca - 3*40.078=120.234

P - 2*30.973=61.946

Now, to find the percentage of mass, we must find total mass, and divide the two elements mass count by this total mass:

120.234+61.946=182.18

Now divide each element mass by the total mass:

Ca - 120.234/182.18=0.6599(Round to 0.65)

P - 61.946/182.18=0.34002(Round to 0.34)

Then multiply both numbers by 100 to get the percentage:

Ca - 65%

P - 34%

So these our your two answer!

Hope this helps!

Answer:

Option C

Explanation:

The complete question is

What is the major organic product obtained from the reaction of

(R)-2-bromohexane with sodium cyanide/acetone?

A) ) trans-2-pentene

B) ( S)-2-Methylpentanenitrile

C) ( S)-2-Methylhexanenitrile

D) (plus or minus)-2-Methylpentanenitrile

Solution

This is an inversion reaction in which (R) 2 Bromohexane convert into (S) -2 – methyl hexane in the presence of Acetone and NaCN.  

The reaction occurs through the SN2 mechanism and  there is inversion of confiruration

Hence, option C is correct

Answer:

Your answer is C

Explanation:

When an acid and base react, the acidic hydrogen ion and the basic hydroxide ion in each acid and base neutralize each other and form water. Meanwhile the conjugate base and conjugate acid (the leftover compounds) react to form an ionic molecule, or a salt. (In chemistry, when an anion and a cation form an ionic bond the new molecule is called a salt). Hope this helps!

Answer: D

Explanation:

liquid evaporates faster at higher temperatures because more particles have a higher speed and can overcome attractions in the liquid.

Answer:

D. A liquid evaporates faster at higher temperatures because more particles have a higher speed and can overcome attractions in the liquid.

Explanation:

Correct on Edge 2022!!!

Good luck everyone, you got this! Have a great day!

Answer:

aldehyde

Explanation:

Answer:

The answer is "Tetrahedral".

Explanation:

The carbon atom of approximately [tex]109.5^{\circ}[/tex] with four attachments. Its general form is one of a tetrahedron: a polyhedron consisting of 4 triangular sides, six straight edges, and four vertex corners from all faces equilateral triangles. The triangular pyramid is often referred to as the triangular pyramid.

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:

436.8 mmHg.

Explanation:

From the question given above, the following data were obtained:

Total pressure (Pₜ) = 0.93 atm

Pressure of N₂ (Pₙ₂) = 270 mmHg

Pressure of O₂ (Pₒ₂) =?

Next, we shall convert the total pressure to mmHg . This can be obtained as follow:

1 atm = 760 mmHg

Therefore,

0.93 atm = 0.93 × 760 mmHg / 1 atm

0.93 atm = 706.8 mmHg

Finally, we shall determine the pressure of the O₂. This can be obtained as follow:

Total pressure (Pₜ) = 706.8 mmHg

Pressure of N₂ (Pₙ₂) = 270 mmHg

Pressure of O₂ (Pₒ₂) =?

Pₜ = Pₙ₂ + Pₒ₂

706.8 = 270 + Pₒ₂

Collect like terms

706.8 – 270 = Pₒ₂

436.8 = Pₒ₂

Pₒ₂ = 436.8 mmHg

Thus, the pressure of O₂ is 436.8 mmHg

Answer:

C

Explanation:

Kepler first law means that planets mover around the sun in a elliptical motion

I believe that this statement is true

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

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:

42.64 L

Explanation:

Using the combined law equation as follows:

P1V1/T1 = P2V2/T2

Where;

P1 = initial pressure (mmHg)

P2 = final pressure (mmHg)

V1 = initial volume (L)

V2 = final volume (L)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the information in this question,

P1 = 748mmHg

P2 = 400mmHg

V1 = 26.7 L

V2 = ?

T1 = 28.4 °C = 28.4 + 273 = 301.4K

T2 = -15.6 °C = -15.6 + 273 = 257.4K

Using P1V1/T1 = P2V2/T2

748 × 26.7/301.4 = 400 × V2/257.4

66.26= 1.554 V2

V2 = 66.26 ÷ 1.554

V2 = 42.64 L

Answer:

0.921 moles

Explanation:

1.91 M means 1.91 moles/liter

482 mL = 0.482 L

0.482 L × 1.91 moles/liter = 0.92062 moles

Answer:

1x10⁻¹²

Explanation:

At equilibrium:

The equilibrium constant for the the reaction can be written as:

[Cu⁺] is squared because it has a stoichiometric coefficient of 2 in the reaction. Cu₂S has no effect on the constant because it is a solid.

Now we can calculate the equilibrium constant:

Answer:

Our bodies convert chemical energy in our food into mechanical energy for us to move.

An electric fan transforms electrical energy into kinetic energy

Reword it tho

Hope this helps!!

Answer:

The cell wall surrounds the plasma membrane and provides the cell tensile strength and protection. ... The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection against mechanical and osmotic stress.

hope It Helps U

Please Mark me As brainlist