CAN SOMEONE HELP ASAP!!

Answer:

the molecular formula of a compound is P₄O₁₀.

M(P₂O₅) = 2 · Ar(P) + 5 · Ar(O) · g/mol.

M(P₂O₅) = 2 · 31 + 5 · 16 · g/mol.

M(P₂O₅) = 142 g/mol; molar mass of empirical formula.

M(PₓOₙ) = 284 g/mol; molecular mass of unknown compound.

M(PₓOₙ) : M(P₂O₅) = 284 g/mol : 142 g/mol.

M(PₓOₙ) : M(P₂O₅) = 2 : 1.

Explanation:

The  empirical formula is [tex]P_{2}O_{5}[/tex]  and The molecular formula is [tex]P_{4}O_{10}[/tex]

[tex](\frac{47.3g}{1})( \frac{1 mol}{30.97g})= 1.41 moles[/tex] of Phosphorus.

[tex](\frac{56.3}{1})(\frac{1 mol}{16}) = 3.51 moles[/tex] of Oxygen

3.51/1.41 = 2.49 (rounded off 2.5)

1.41/1.41 = 1

2.5 *2 = 5 (Oxygen)

2 *1 = 2 (Phosphorus)

Hence  [tex]P_{2}O_{5}[/tex]  is Empirical formula

and [tex]P_{4}O_{10}[/tex] is Molecular Formula

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Answer:

It Should  be Strong Acid

Explanation:

Strong acids and bases ionize fully in an aqueous solution. Weak acids and bases also ionize, but only partially and the reaction is reversible. So how do we know if an acid or base is strong or weak? A simple way to determine strength is to add the acid or base to water— high reactivity means a stronger acid or base. This reactivity is measured with a value called the Ka or Kb value. It tells us how reactive an acid or a base is based on how many hydronium or hydroxide ions are formed during the reaction. Hope it helps :)

Answer:

There are 0.311 moles of  gas in the tank

Explanation:

Complete question

A 4.00g sample of gas is found to exert a pressure of 1.71 atm when confined in 3.60L container at a temperature of 241 K. Find the number of moles of the gas

Solution

As we know

[tex]PV = nRT[/tex]

where P is the pressure of the gas in atm

V is the volume in liters

n is the number of moles

R is the gas constant = 0.08206 L·atm/K·mol

and T is the temperature in Kelvin

Substituting the given values in above equation, we get -

[tex]1.71 * 3.60 = n * 0.08206 * 241\\n = 0.311[/tex]

There are 0.311 moles of  gas in the tank

Answer:

i'm thinking 27.6 not sure

Explanation:

Answer:

electromagnetic waves

Explanation:

The waves that do not need a medium to travel through are known as electromagnetic waves.

These waves do not need any medium for their propagation or traveling. The waves have different wavelength and energy factors depending upon their rate of propagation. EMR waves travel from the sun to the earth in space.

Examples of electromagnetic waves are Xrays, gamma rays, radio waves, and more.

Find more information about electromagnetic waves here:

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Answer:

well the world would be shocked

Explanation:

and suprise

Answer:

[tex][C]=0.0221M[/tex]

Explanation:

Hello there!

In this case, according to the given chemical reaction at equilibrium:

[tex]3A\rightleftharpoons 3B+2C[/tex]

It is possible for us to set up the equilibrium expression as shown below:

[tex]Kc=\frac{[B]^3[C]^2}{[A]^3}[/tex]

Whereas Kc, [A] and [B] are known as 0.0091, 0.031M and 0.0823M and it is required to calculate [C]; thus, we solve for it as follows:

[tex][C]^2=\frac{[A]^3Kc}{B]^3}[/tex]

[tex][C]=\sqrt{\frac{(0.031)^3*0.0091}{(0.0823)^3}}[/tex]

[tex][C]=0.0221M[/tex]

Best regards!

Answer:

This is true.

Explanation:

Answer:

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Explanation:

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Answer:

12,312 J or 0.12312 kJ

Explanation:

q = mCT

q = J of heat  

m = mass

C = heat capacity

T = temp change

q = 38 x 0.90 x 3.6

q = 12312 J

q = 0.12312 kJ

The percentage of CO2 increased 48 percent. Hope this helped!

Answer:

caca123

Explanation:

UM

Answer:

Mass of Oxygen is equal to 0.005566 grams

Explanation:

As we know,

ppm=(grams of solute/grams of solution)*1,000,000

Substituting the given values, we get -

23 ppm = (grams of solute/242.0066 grams)*1,000,000

1 ml = 1 gram

On solving the above equation, we get -

grams of solute = (23 * 242.0066)/1,000,000

= 0.005566 grams

Mass of Oxygen is equal to 0.005566 grams

Answer:

C

Explanation:

First there is no chemicals involved so cross out B and D. Wind turbines are made to create energy not to convert it so A is crossed out as well. The remaining answer is C.

The energy is transformed from mechanical to electrical when the blades are spinning, as shown.

Wind turbines are large fans that convert the kinetic energy of wind into electrical energy.

The blades run by winds and generate electricity.

They are helpful, but they are a threat to birds and bats.

Thus, the correct option is C, mechanical to electrical energy.

Learn more about wind turbines

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Answer:

Its axis is tilted by 26.73 degrees with respect to its orbit around the Sun, which is similar to Earth's 23.5-degree tilt. This means that, like Earth, Saturn experiences seasons. Like Jupiter, Saturn is made mostly of hydrogen and helium.

Explanation:

Thats all I could think of, please mark brainliest

Answer:

A single bond, but it's also a hydrogen bond.

Explanation:

A hydrogen bond forms when hydrogen bonds to the 3 most electronegative atoms: Oxygen, Nitrogen, or Fluorine.

It's a single bond because hydrogen only has two valence electrons. Therefore, the rest of the electrons are placed around the nitrogen atom.

Answer:

Suppose a piece of iron with a mass of 21.5 g at a temp of 100.0 °C is dropped into an insulated container of water. The mass of the water is 132.0 g and its temperature before adding the iron is 20.0 °C. What will be the final temp of the system? Specific heat of iron is 0.449 kJ/kg K.

Solution:

1) Since

qlost, metal = qgained, water

we write

(mass) (Δt) (Cp, metal) = (mass) (Δt) (Cp, water)

2) Substituting:

(21.5) (100 − x) (0.449) = (132.0) (x − 20) (4.184)

Some explanation:

a) 100 − x is the Δt for the metal; it starts at 100.0 °C and drops to some unknown, final value.

b) x − 20 is the Δt for the water; it starts at 20.0 °C and rises to some unknown, final value.

c) Since both metal and water wind up at the same ending value, we need to use only one unknown for the two Δt expressions.

3) A wee bit of algebra:

(2150 − 21.5x) (0.449) = (132x − 2640) (4.184)

965.35 − 9.6535x = 552.288x − 11045.76

561.9415x = 12011.11

To 3 sig figs, the answer is 21.4 °C.

Explanation:

hope its correct!

Answer:

20 Liters

Explanation:

Boyles Law => ΔP ∝ 1/ΔT => P₁V₁ = P₂V₂ => V₂ = P₁V₁/P₂

P₁ = 2 atm

V₁ = 10 Liters

P₂ = 1 atm

V₂ = ?

V₂ = 2atm x 10L / 1atm = 20 Liters

Answer:

Explanation:

To find the pressure in kPa we use the conversion

If 1 atm = 101.3 kPa

400 atm = 400 × 101.3 = 40520 kPa

Expressing it in standard form we have the final answer as

Hope this helps you

Answer: 3.04 x 10 mm Hg

Explanation:

The bond between the Cu²⁺ and OH⁻ ions is, well, ionic. However, the bond between the O and the H in the OH⁻ ion is covalent. So Cu(OH)₂ is, as a whole, an ionic compound, but it contains or comprises both ionic and covalent bonds.

Answer:

fluid D

Explanation:

Fluid D has the highest viscosity because it is more difficult for it to move which makes it hit the table at 15 seconds

while fluid C has the lowest Viscocity which makes it move easily and it hit the table fastest

Answer:

0.96

Explanation:

Number of moles of Fe(III) = 3/1000 *  0.002 M = 6 * 10^-6 moles

Number of moles of SSA = 7/1000 * 0.02 = 1.4 * 10^-4 moles

Total number of moles =  6 * 10^-6 moles +  1.4 * 10^-4 moles

Mole fraction of SSA = number of moles of SSA/ total number of moles.

Mole fraction of SSA =  1.4 * 10^-4 moles/  6 * 10^-6 moles +  1.4 * 10^-4 moles

Mole fraction of SSA = 0.96

Answer:

Seasons are caused by the Earth’s revolution around the Sun, as well as the tilt of the Earth on its axis. The hemisphere receiving the most direct sunlight experiences spring and summer, while the other experiences autumn and winter. During the warmer months, the Sun is higher in the sky, stays above the horizon for longer, and its rays are more direct.

Answer:

Help with what?

Explanation:

Answer:

help with whattt

Explanation:

um

Answer:

Answer is meter. ~~~~~~

Answer:

True!

Explanation:

A spectrum is simply a chart or a graph that shows the intensity of light being emitted over a range of energies. Have you ever seen a spectrum before? Probably. Nature makes beautiful ones we call rainbows. Sunlight sent through raindrops is spread out to display its various colors (the different colors are just the way our eyes perceive radiation with slightly different energies).

Hope i helped!