Convert 26.02 x 1023 molecules of C2H8 to grams. Round your answer to the hundredths place.

Answer:

1.1: Taking Measurements. Chemists measure the properties of matter and express these measurements as quantities. A quantity is an amount of something and consists of a number and a unit. The number tells us how many (or how much), and the unit tells us what the scale of measurement is.

Answer:

b

Explanation:

this is because all organisims need water, c is out of the question because no energy is needed, d is out because it is needed for fighting against predators

Answer:

A. The sun's rays strike the water more directly near the equator.

Explanation:

I pass the test

that science I'm not good really at that

If more ammonia is added to the reaction at equilibrium, the equilibrium will shift to the right.

The principle states that reactions at equilibrium will always adjust to neutralize any effect due to constraints.

Thus, ammonia being a reactant in the reaction will make the equilibrium shift to the right because the reaction will adjust to annul the effects of increasing the concentration of ammonia in the reaction.

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Answer:

V⬇2=64.mL this is the answer and the 2 is supposed to be at the bottom which the arrow stands for so do not put the arrow with that

Answer:

3p^2

Explanation:

after filling 3s^2 only two electrons  left out of 14 so the next sub shell is 3p therefore ,X represents 3p^2

Answer:

a lithium atom (Z=3, A=7 AMU) contains three protons (found from Z), three electrons (as the number of protons is equal to the number of electrons in an atom), and four neutrons (7 – 3 = 4).

Explanation:

The equilibrium constant shows the extent to which reactants are converted into products.

In this case, we must find the reaction quotient as follows;

Qc = [0.55]^2/[0.12] = 2.5

Since the Qc > Kc, it means that the reverse direction is favored in this reaction.

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Part 1

Part 2

Explanation:

2, 8, 8, 2 is the electron arrangement of Calcium.

The way that the "orbitals", the shells, fill up is given as

[tex]1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{2} 3d^{10}[/tex] . . . etc etc.

It is more stable for the fourth shell to start filling up with an electron pair, and then subsequent electrons filling up the third shell again.

So while potassium 19, is 2,8,8,1

And calcium 20, is 2,8,8,2

Scandium 21 will fill up as, 2,8,9,2

This will continue until we reach Zinc 30, which will fill up as 2,8,18,2. The third shell is now "full", and the fourth shell will now being to fill up.

The fourth orbital starts getting filled up again, Gallium 31, is 2,8,18,3

Grams per liter in the solution give the density of the solution. The density of the solution is 27.4 g/L. Thus, option d is correct.

Density is the ratio of the mass in gms to the volume of the solution in liters.

Given,

Mass of  potassium chloride = 8.210 gms

Volume of solution = 0.300 L

Density is calculated as:

ρ = mass ÷ volume

= 8.210 ÷ 0.300

= 27.36 g/L

Therefore, the density of the solution is 27.4 g/L.

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Answer:

Answer:

A)6.6×10^22atoms of Pt in the cube

B)1.4×10^-8m

Explanation:

(a) Calculate the number of Pt atoms in the cube.

an edge length of platinum (Pt) = 1.0 cm.

Then Volume= 1.0 cm×1.0 cm×1.0 cm=1cm^3

Then we have volume of the cube as 1cm^3

Given:

The density Pt = 21.45 g/cm3

the mass of a single Pt atom =3.240 x 10^-22 g

Then with 1atom of the platinum element, we can calculate the number of Pt atoms in the cube as

Density of pt/mass of a single Pt atom

=(21.45 /=3.240 x 10^-22)

=6.6×10^22atoms of Pt in the cube

B)Volume of cube V=4/3πr^3

V= 4/3 ×π×r^3

V= 4.19067r^3

r^3= V/4.19067

But volume is not total volume but just 74% of it, then With 74% of the space inside the cube is taken up by Pt atoms, then we need to find 74% of volume of the cube which is 1cm^3

74/100 ×1= 0.74cm^3

Then our new volume V is 0.74cm^3

r^3=0.74/4.19067×6.620 x 10^22

r^3=2.6674×10^-24

r= 3√2.6674×10^-24

r=1.4×10^-8m

see the attached file!!

The wavelength of the radiation is 4.7 x 10⁻⁹ m

What is the Einstein's Formula for Energy?

The energy

E is given, from Einstein's formula, as:

E=h⋅ν

Where:

h=6.63×10⁻³⁴Js is Planck's constant;

ν is the frequency.

You can relate frequency and wavelength

λ through the speed of light c as:

c=λ⋅ν

So finally you get:

E=hc/λ

It is given in the question

The energy of a photon is 4.23 x 10⁻¹⁷ J.

Wavelength = ?

λ = hc/E

λ = 6.63×10⁻³⁴x 3 x 10⁸ /  4.23 x 10⁻¹⁷

λ = 4.7 x 10⁻⁹ m

Therefore the wavelength of the radiation is 4.7 x 10⁻⁹ m .

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A combustion reaction is a reaction that reacts in the presence of oxygen molecules. Methane will release -3115 kJ/mol of heat.

A combustion reaction includes the reaction between the chemical reactant and oxygen molecule to produce the product. The combustion reaction between methane and oxygen is given as:

CH₄(g) + 2O₂ (g) → CO₂(g) + 2H₂O (l), ΔH = -890 kJ/mol

The stoichiometry coefficient from the reaction gives 1 mole of methane releases -890 kJ/mol enthalpy.

So, 3.5 moles methane will release = 3.5 × -890 = -3115 kJ/mol

Therefore, -3115 kJ/mol of heat is released.

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Answer:

5.74 gm

Explanation:

First, use the ideal gas law   PV = n RT

  to find the number of moles, then multiply by 28 g/ mole

PV = n RT    T must be in Kelvin    R = 8.314463 L kPa/(K - Mol)

                         ( make sure you use the R with the correct units!!)

182 kPa * 3 L  =  n (8.314463 ) ( 273.15+47.2)

 solve for n = .205 moles

.205 mole * 28 g/mole = 5.74 gm  

The mass of the gas can be calculated using ideal gas law. The mass of the gas is approximately 1.37 g.

According to ideal gas law, the pressure , volume temperature and number of a moles of a gas is related as :

PV = nRT

To calculate the mass of a gas that would fit into a container at a given temperature, pressure, and volume, we can use the ideal gas law equation:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature in Kelvin.

We can rearrange this equation to solve for the number of moles:

n = PV/RT

Once we know the number of moles, we can use the molar mass of the gas to calculate the mass of the gas:

mass = n x molar mass

where molar mass is given as 28.0 g/mol.

Substituting the given values, we get:

n = (182 kPa) x (3.00 L) / [(8.31 J/mol-K) x (47.2°C + 273.15)] = 0.0489 moles

mass = 0.0489 moles x 28.0 g/mol = 1.37 g

Therefore, the mass of the gas that would fit into a 3.00 L container at 182 kPa and 47.2°C is approximately 1.37 g.

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The molecularity of the elementary step X + X + Y → Z is 3.

Molecularity in chemistry is defined as the total number of molecules that react in an elementary reaction .

In the given question the elementary reaction given is

X + X + Y → Z?

or 2X +Y --> Z

X molecule is 2 and Y molecule is 1 so the molecularity is 2+1 = 3

The molecularity of the elementary step X + X + Y → Z is 3.

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Answer:

hot

Explanation:

You'll need to boil the solution, though, to reduce the amount of water so that it is concentrated enough to form crystals. Cook your solution over low to medium heat for about an hour. You want to reduce it down to 1 cup or less.

Answer:

because of gravitional force(gravity)........

Glycogen is formed by the loss of water molecules along the length of the polymer chain as the glucose molecules are joined together.

Glycogen is formed by a process known as condensation polymerization. This involves the loss of -OH from one glucose molecule and the loss of H from another glucose molecule as the chain is formed.

Hence, glycogen is formed by the loss of water molecules along the length of the polymer chain as the glucose molecules are joined together.

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Answer:

20(50) = 40(V₂)

⇒1000 = 40V₂

⇒V₂ = 1000/40

⇒ V₂ = 25 mL

Explanation:

Answer:

25.0 mL

Explanation:

I took the test and got it right :)

Answer:

3/22.4

Explanation:

The molality of the sugar solution is 0.034 mol/kg.

The molality and molarity of a chemical solution are equivalent for aqueous solutions of covalent molecules, such as sugar.

Answer:

sugar I like it I think iyrx

Empirical formula mass

Molar mass=232.2g/mol

Find n

Molecular formula

Find the empirical formula mass

Find n

Round to nearest whole

Molecular formula

Answer: It shows whether the reaction is exothermic or endothermic.

Explanation:

Answer:

D.+1°e symbol represents a type of radiation that has the same mass as an electron and a positive charge.

Answer:

warm air over the land and cool air over the ocean.

Answer:

Balanced forces are forces that act in opposite directions and cancel each other out

let me know if you have any other questions

Answer:

Explanation: