At a certain temperature, O2 molecules move at an average velocity of 480 m/s. At that same temperature what would be the velocity of He atoms?

I think the answer is organelles.

Answer:

No element shares the same atomic number. The atomic number of every element is unique to itself, just like a fingerprint is unique to a human. The atomic number of element allows us to identify it, like how we can identify a person from their fingerprint.

Explanation:

Answer:

bio mass is renewable

natural gas non renewable geothermal energy renewable

Explanation:

biomass is by palnts and animals geothermals is unlimeted because its made out of the earths core

Answer:

36.4cm2

Explanation:

Answer:

I think the answer is, 100.

Explanation:

but i dont know try

Answer:

The answer is D

The last one

Answer:

1.62 * 10^-11 J

Explanation:

Nitrogen-14 nucleus has seven neutrons and seven protons. So;

Total mass of protons = 7(1.00728 amu)

Total mass of neutrons = 7(1.00866 amu)

Total mass of nucleons = 7(1.00728 amu) + 7(1.00866 amu)= 14.11158 amu

Mass of Nitrogen-14 nucleus = 14.00307 amu

Mass defect = 14.11158 amu - 14.00307 amu = 0.10851 amu = 1.801852171 * 10^-28 Kg

Binding energy = Δmc^2

Where;

Δm = mass defect

c = speed of light

Binding energy = 1.801852171 * 10^-28 Kg * (3 * 10^8)^2

Binding energy = 1.62 * 10^-11 J

Answer:

0.10851 amu

1.62

-11

Explanation:

Yw

Answer:

Is this the full question?

Answer:

1. m(NH₄)₂HPO₄ = 1.62 g

2. molesC₃H₇NO₂ = 1.79 moles

3. V = 4.87x10⁹ L

Explanation:

These questions are pretty easy to solve, using the correct expressions and formula.

1. To do this, we just need the density of the (NH₄)₂HPO₄. In this case, the reported density is 1.62 g/mL, therefore:

d = m/V  (1)

Where:

d: density (g(mL)

m: mass of the compound (g)

V: volume of the compound (mL)

As we already have the volume, we can solve for m:

m = d * V  (2)

m = 1.62 * 1

2. To do this, we need the atomic weights of each element that composes the alanine.

C: 12 g/mol;  H: 1 g/mol;   N: 14 g/mol;     O: 16 g/mol

With these atomic weight, let's determine the molar mass of alanine:

MM C₃H₇NO₂ = 3(12) + 7(1) + 14 + 2(16) = 89 g/mol

Now to get the moles, we use the following expression:

moles = m/MM (3)

moles = 159 / 89

3. We have the mass and density of the nitric acid, we just solve for Volume from expression (1) of part 1:

V = m/d  (3)

V = 1.612x10¹⁰ pounds / 12.53 pounds/gallons

V = 1.287x10⁹ gallons

Converting this to liters:

V = 1.287x10⁹ * 3.7854

Hope this helps

Answer:

the answer is c carbon dioxide and water

Answer:

A conduct heat

Explanation:

because in cooking burners on stove will conduct heat energy to the bottom of the pan sitting on top of it. From there, the pan conducts heats to it content.

Answer:

fomula; ( x = mutiplacation btw)

% m/m = m(solute) / m(solution) x 100%

0.50g x 70% = m/m x 100%

0.5g x 70% / 100% = 3.5 g KI

(both % cancle each other)

Explanation:

heads up might be wrong i did it myself

Answer:

Hello There!!

Explanation:

I believe the answer is O They form compounds with very bright colors.

hope this helps,have a great day!!

~Pinky~

The statement about noble gases that is correct is D. They form compounds with very bright colors.

Noble gases simply refers to the elements that have similar properties. Noble gases are colorless, odorless, and have very low reactivity.

Examples of noble gases are helium, argon, Krypton, xenon, etc. Noble gases also form compounds with very bright colors.

In conclusion, the correct option is D.

Read related link on:

https://brainly.com/question/24070118

Answer:

158 mol :)

Explanation:

Answer:

Lichens can be used as air pollution indicators, especially of the concentration of sulphur dioxide in the atmosphere. Lichens are organisms that grow in exposed places such as rocks or tree bark. They need to be very efficient at absorbing water and nutrients to grow there.

Answer:

Water forms the basis of almost every type of cosmetic product, including creams, lotions, makeup, deodorants, shampoos and conditioners. Water plays an important part in the process, often acting as a solvent to dissolve other ingredients and forming emulsions for consistency.

Explanation:

Water forms the basis of almost every type of cosmetic product, including creams, lotions, makeup, deodorants, shampoos and conditioners. Water plays an important part in the process, often acting as a solvent to dissolve other ingredients and forming emulsions for consistency.

the general formular is cnH2n-2

Answer:

Pulling back on the plunger allows you to put in more air into the pump and the more air you have inside a fixed volume, the greater the pressure becomes. (D)

Answer:

H2O

=(1×2)+(8)

=20

Explanation:

We have 1 Hydrogen(H) and 8 Oxygen(O)neutrons . Following the molecule formula, H2O, which means we have 2 Hydrogen that needs to times with 1 neutron;and we have only 1 Oxygen which has 8 neutrons. So 2 (H) have to times 1 and 1(O) have to times 8.

Answer:

The new volume of the gas is 276.45 mL.

Explanation:

Charles's law indicates that for a given sum of gas at constant pressure, as the temperature increases, the volume of the gas increases, and as the temperature decreases, the volume of the gas decreases.

Charles's law is a law that mathematically says that when the amount of gas and pressure are kept constant, the quotient that exists between the volume and the temperature will always have the same value:

[tex]\frac{V}{T} =k[/tex]

Analyzing an initial state 1 and a final state 2, it is satisfied:

[tex]\frac{V1}{T1} =\frac{V2}{T2}[/tex]

In this case:

Replacing:

[tex]\frac{250 mL}{293 K} =\frac{V2}{324 K}[/tex]

Solving:

[tex]V2=324 K*\frac{250 mL}{293 K}[/tex]

V2= 276.45 mL

The new volume of the gas is 276.45 mL.

Answer:

2.122×10^25atoms

Explanation:

number of moles=mass/molar mass

7.05moles= mass of pyridine/79

reacting mass of pyridine=556.95

C5H5N= (12×5)+(5)+(14)=79

C5=60

to find the mass of carbon in 556.95g of pyridine we take the stoichometric ratio

60[C5] -----> 79[C5H5N]

x[C5] --------> 556.95g[C5H5N]

cross multiply

x=(60×556.95)/79

x=423g of carbon

moles=mass/molar mass

moles of carbon=423/12

moles=35.25moles of carbon

moles=number of particles/Avogadro's constant

35.25=number of particles/6.02×10^23

number of particles=2.122×10^25atoms of carbon

The number of carbon atoms present in the 7.05 moles of pyridine is equal to 2.12 ×10²⁵. Therefore, option (D) is correct.

Avogadro’s number can be useful to express the number of particles in 1 mole of a chemical substance. Generally, these particles can be ions, atoms, molecules, electrons, or protons, according to the type of chemical reaction.

Avogadro’s constant is experimentally found approximately equal to 6.022 × 10²³ per mole.

Given, the number of moles of the Pyridine =  7.05 mol

The molar mass of the C₅H₅N = 79 g/mol

On molecule of pyridine has carbon atoms = 5

One mole of pyridine has carbon atoms = 5 × 6.022 × 10²³

Then 7.05 moles of  pyridine have carbon atoms = 7.05 ×5 × 6.022 × 10²³

                                                                             = 2.12 ×10²⁵ carbon atoms

Therefore, 2.12 ×10²⁵ carbons are present in 7.05 moles of pyridine.

Learn more about Avogadro's number, here:

brainly.com/question/11907018

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4a. D - The last number in the configuration represents the group, in this case 3, and the number of shells represent the period, which is also 3.

4bi. Rubidium metal reacts very rapidly with water to form a colourless solution of rubidium hydroxide (RbOH) and hydrogen gas (H2). The resulting solution is basic because of the dissolved hydroxide. The reaction is very exothermic and explosive.

4bii. Lithium is smaller in size than potassium . so valence electrons are more tightly held in Li than K. Due to larger size of K the valence electrons are loosely held and easy to remove the electron from K. Hence K is more reactive.

Answer:

Diamond and graphite forms of carbon, silicon dioxide (silica)

thenks and mark me brainliestt pls :))

Answer:

Diamond and graphite forms of carbon) and silicon dioxide (silica) are examples of giant covalent structures (lattices) of atoms. All the atoms in these structures are linked to other atoms by strong covalent bonds and so they have very high melting points.

Reaction 1 :-

Reaction 2 :-

Answer:

Explanation:

c