11. Which of the following equations is balanced?
a. Al + Br₂-2 AlBr3
b.
c.
d.
2 Al +2 Br₂ → 3 AlBr,
2 Al + 3 Br₂ → 2 AlBr,
Al + Br₂ →→→ AlBr3

Empirical formula units is 2 and the molecular formula is CxHyOz.

Molar mass-The molar mass of a chemical compound is determined by dividing its mass by the quantity of that compound, expressed as the number of moles in the sample, measured in moles. The molar mass of a substance is a bulk attribute rather than a molecular one.Calculate the molar mass of a substance by adding the molar masses of its constituent atoms.

There are 40.0 in 100 g of the unknown.

40.0⋅g/12.011⋅g⋅mol−1C

6.7⋅g/1.00794⋅g⋅mol−1 H and

53.5⋅g/16.00gmol−1  

We divide by to get C : H : O.

=3.33:6.65:3.34

. We get an empirical formula of C H 2 O by dividing each elemental ratio by the LOWEST number, which is close enough to WHOLE numbers.

Now the molecular formula is always a multiple of the empirical formula; i.e.

(EF)n=MF.

So 60.0⋅g.mol−1=n×(12.011+2×1.00794+16.00)g⋅mol−1.

Clearly n=2, and the molecular formula is×(CH2O) =CxHyOz.

LEARN MORE ABOUT Molar mass HERE

https://brainly.com/question/837939

#SPJ4

A) The number of molecules in the thermosphere is not high enough to transfer heat to human skin, and therefore, the thermosphere feels cold to humans.

The thermosphere is the highest layer of the Earth's atmosphere, and despite its high temperatures, it would feel cold to humans because of the low density of molecules.  

The thermosphere's temperature is due to the absorption of solar radiation, but the low density of molecules means that there is not enough matter to transfer the heat to human skin. The atmosphere is much denser in the lower layers, and this is where heat is transferred to humans.

Therefore, even though the thermosphere has high temperatures, it would still feel cold to humans due to the lack of heat transfer caused by the low density of molecules. In summary, the thermosphere feels cold to humans because there are not enough molecules to transfer heat to our skin.

To know more about thermosphere visit:

https://brainly.com/question/13497783

#SPJ11

Answer:

6.14 atm

Explanation:

Initial temperature (T₁) = 100 °C

Initial pressure (P₁) = 4 atm

Final temperature (T₂) = 300 °C

Final pressure (P₂) =?

NOTE: Volume = constant (since the system is a closed system)

Next, we shall convert celsius temperature to Kelvin temperature. This can be obtained as follow:

T(K) = T(°C) + 273

Initial temperature (T₁) = 100 °C

Initial temperature (T₁) = 100 °C + 273 = 373 K

Final temperature (T₂) = 300 °C

Final temperature (T₂) = 300 °C + 273 = 573 K

Finally, we shall determine the pressure at the highest temperature as follow:

Initial temperature (T₁) = 373 K

Initial pressure (P₁) = 4 atm

Final temperature (T₂) = 573 K

Final pressure (P₂) =?

P₁ / T₁ = P₂ / T₂

4 / 373 = P₂ / 573

Cross multiply

373 × P₂ = 4 × 573

373 × P₂ = 2292

Divide both side by 373

P₂ = 2292 / 373

P₂ = 6.14 atm

Thus, the pressure at the highest temperature is 6.14 atm

Electromagnetic Spectrum is defined as the range of wavelengths or frequencies over which electromagnetic radiation extends.

The order of electromagnetic spectrum is given below:

Learn more about the electromagnetic spectrum from the link given below.

https://brainly.com/question/13134589

#SPJ4

We can't feel the force of attraction between us and mars due to the large distance and negligeable gravitation.

Gravitation is the universal force of attraction acting between all matter.

According to the universal law of gravitation, the effect of the force of gravity decreases as the distance increases.

The gravitation force is inversely proportional to the radius or the distance.

So, the gravitational force exhibited by the mars is not experienced by us due to the large distance.

Learn more about gravity here ;

https://brainly.com/question/4014727

#SPJ1

Answer: D.

Mars is a long distance away.

Explanation: plato :3

Hope this helps!

Answer:

You can download the app density calculate

for earth quake write, a disturbance in a suburban city has cause a massive earth quake and many problems for the citizens living there, add what you want after that

hope this helps :D

Answer:

wow

Explanation:

dang

Answer:

El volumen que ocupará la misma masa de aire es 839.49 mL.

Explanation:

Las condiciones normales de presión y temperatura (abreviado CNPT) o presión y temperatura normales (abreviado PTN o TPN), son términos que implican que la temperatura referenciada es de 0ºC (273,15 K) y la presión de 1 atm (definida como 101.325 Pa).

La ley de Boyle dice que “El volumen ocupado por una determinada masa gaseosa a temperatura constante, es inversamente proporcional a la presión”  y se matemáticamente como

Presión*Volumen=constante

o P*V=k

La ley de Charles es una ley que dice que cuando la cantidad de gas y de presión se mantienen constantes, el cociente que existe entre el volumen y la temperatura siempre tendrán el mismo valor:  

\(\frac{V}{T} =k\)

La ley de Gay-Lussac​ establece que la presión de un volumen fijo de un gas, es directamente proporcional a su temperatura. Se expresa matemáticamente como:

\(\frac{P}{T} =k\)

Combinando estas tres leyes se obtiene:

\(\frac{P*V}{T} =k\)

Siendo un estado inicial 1 y un estado final 2, la expresión anterior queda determinada como:

\(\frac{P1*V1}{T1} =\frac{P2*V2}{T2}\)

En este caso:

Reemplazando:

\(\frac{101325 Pa*773 mL}{273,15 K} =\frac{93300 Pa*V2}{273.15 K}\)

y resolviendo obtenes:

\(V2=\frac{273.15 K}{93300 Pa} *\frac{101325 Pa*773 mL}{273,15 K}\)

V2= 839,49 mL

El volumen que ocupará la misma masa de aire es 839.49 mL.

This is because side reactions and unwanted byproducts are often favored at higher temperatures.

To avoid the formation of a side product in this experiment, the best approach would be to keep the reaction at a low temperature and avoid overheating the product during distillation. This is because side reactions and unwanted byproducts are often favored at higher temperatures. By maintaining a low temperature, the reaction can be controlled to favor the desired product and minimize the formation of side products.

Drying the aqueous layer, using pure sodium iodide, using pure silver nitrate, and venting the gases out of the separatory funnel are not specifically related to preventing the formation of side products in this context. They may be relevant for other aspects of the experiment, but they would not directly address the formation of side products.

Learn more about reactions here

https://brainly.com/question/16737295

#SPJ11

There are 1.31 x 1022 bromide ions in 2.00 g of \(MgBr_2\).

For more questions on bromide ions

https://brainly.com/question/29228517

#SPJ8

Answer:

28.8

Explanation:

add and then divide

Matter is everything that occupies physical space. Everything on earth, including the atmosphere, that occupies space and has a certain mass is considered matter.

Anything that occupies space and has mass is considered to be matter. The world around you is composed of matter. A general phrase for the "stuff" all around you is matter. An item has a quantifiable size or volume when it occupies space. A measurement of matter's resistance to acceleration is its mass. Everything around us takes up space. Now, we are aware that matter refers to everything that takes up space. Atoms are the minuscule constituents of matter. Typically, we focus our studies solely on the three states of matter: solid, liquid, and gas.

To know more about Matter please click on the link brainly.com/question/13556931

#SPJ4

The phytoplankton responsible for the sediments that formed the White Cliffs of Dover, UK are coccolithophorids.

The phytoplankton responsible for the sediments that formed the White Cliffs of Dover, UK are coccolithophorids. These tiny organisms have cell walls made of calcium carbonate (CaCO3) plates called coccoliths. When these organisms die, their coccoliths sink to the ocean floor and accumulate over time, forming sedimentary rocks like those seen in the White Cliffs. Coccolithophorids are found in oceans all around the world and play an important role in the global carbon cycle, as they can both absorb and release carbon dioxide. To provide a detailed explanation of the specific type of phytoplankton responsible for the formation of the White Cliffs.

To know more about phytoplankton visit: https://brainly.com/question/10279696

#SPJ11

The oxygen binding by hemocyanins is mediated by d) a copper atom.

Hemocyanins are copper-containing proteins found in the blood of some invertebrates, such as mollusks and arthropods. The copper atoms in hemocyanins bind with oxygen molecules, allowing the transport of oxygen throughout the organism's body.

                                        Unlike hemoglobin in vertebrates, which uses iron ions to bind with oxygen, hemocyanins use copper atoms. The copper atoms in hemocyanins form a complex with oxygen molecules, which gives the protein a blue color. This process is essential for the survival of many invertebrates that rely on hemocyanins for oxygen transport.
                                         The oxygen binding by hemocyanins is mediated by e) a pair of copper atoms. Hemocyanins are respiratory proteins that use copper ions, rather than iron ions, for oxygen transport. These copper atoms work together to bind oxygen, allowing hemocyanins to carry out their oxygen transport function in invertebrates such as mollusks and arthropods.

Learn more about Hemocyanins

brainly.com/question/30811983

#SPJ11

The photon energy (E) of a light wave can be calculated using the formula: the photon energy of the yellow-orange light produced by sodium vapor streetlights is approximately \(3.37 x 10^{-19} J\).

E = hc/λ

where h is the Planck constant, c is the speed of light, and λ is the wavelength of the light.

Substituting the values:

λ = 589 nm = \(589 x 10^{-9}\) m

h = 6.626 x \(10^{-34}\) J s

c = 3.0 x 10^8 m/s

E = (6.626 x \(10^{-34}\) J s x 3.0 x \(10^{8}\) m/s) / (589 x \(10^{-9}\) m)

E = 3.37 x \(10^{-19}\) J

Therefore, the photon energy of the yellow-orange light produced by sodium vapor streetlights is approximately 3.37 x \(10^{-19}\) J

Learn more about photon energy

https://brainly.com/question/28167863

#SPJ4

Answer:

Show the image?

Explanation:

Answer:

The answer is

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \)

From the question

mass = 12.9 g

volume = 8 cm³

The density of the block is

\(density = \frac{12.9}{8} \\ = 1.6125\)

We have the final answer as

Hope this helps you

Answer:

it will dilute to its natrual state. so c

Explanation:

Answer:

Increasing precision with multiple measurements

Explanation:

The more measurements you take (provided there is no problem with the clock!), the better your estimate will be. Taking multiple measurements also allows you to better estimate the uncertainty in your measurements by checking how reproducible the measurements are.

Answer:

All measurements should be done twice to absolutely make sure that you have the correct measurement and  to avoid any mistakes if you are like building lets say a table or doing a equation. The saying is measure twice cut once

Explanation:

The equilibrium potential of a copper wire immersed in 0.0007 M CuSO₄ is 1.191 V.

To calculate the equilibrium potential of a copper wire immersed in 0.0007 M CuSO₄ solution, we need to use the Nernst equation. The Nernst equation is:

E = E° - (RT/nF) * ln(Q)

Where E is the equilibrium potential (in volts), E° is the standard electrode potential, R is the gas constant (8.314 J K-1 mol-1), T is the temperature (in Kelvin), n is the number of electrons transferred (2 in this case), F is Faraday’s constant (96485 C mol-1), and Q is the reaction quotient.

In this case, E° = 0.34 V, T = 298 K, n = 2, F = 96485 C mol-1, and Q = 0.0007 M CuSO4. Therefore, the equilibrium potential of the copper wire is:

E = 0.34 V - (8.314 J K-1 mol-1 * 298 K / (2 * 96485 C mol-1)) * ln(0.0007 M CuSO4)
E = 0.34 V - (-0.851 V)
E = 1.191 V

Therefore, the equilibrium potential of the copper wire immersed in 0.0007 M CuSO₄ solution at 25°C is 1.191 V.

Complete question:

Calculate the equilibrium potential of a copper wire immersed in 0.0007 M CuSO4 solution. The standard electrode potential for the reaction Cu2+ + 2e- = Cu0 at 25°C is 0.34 V (NHE).

Learn more about  equilibrium potential at https://brainly.com/question/28304088

#SPJ11

Answer:

43.4

Explanation:

I think

Therefore, the volume of nitrous oxide decomposed is 10.0 mL, and the volume of nitrogen collected is also 10.0 mL.

The law of definite proportions, also known as the law of constant composition, states that a given chemical compound always contains the same elements in exactly the same proportions by mass. This means that the ratio of the masses of the elements in a compound is always the same, regardless of the source of the compound or the method by which it was prepared. This law is one of the fundamental principles of chemistry and is important for understanding the composition and properties of chemical compounds.

Here,

To answer this question, the principle of the law of definite proportions is used. According to this law, in a chemical compound, the elements are always combined in a fixed proportion by mass.

Now, let's use this principle to solve the problem:

The chemical equation for the decomposition of nitrous oxide (N₂O) is:

N₂O → N₂ + O₂

According to the equation, 1 mole of N₂O will produce 1 mole of N₂ and 1 mole of O₂. Therefore, the ratio of volumes of N₂O to O₂ is 1:1.

Assuming the gases are measured under the same conditions of temperature and pressure, we can use the volume ratio to calculate the volume of nitrous oxide that decomposed.

If 10.0 mL of O₂ is formed, then the volume of N₂O decomposed is also 10.0 mL.

Similarly, since the volume ratio of N₂ to O₂ is also 1:1, the volume of nitrogen collected is also 10.0 mL.

To know more about law of definite proportions,

https://brainly.com/question/13058110

#SPJ1

The gas molecules move between the system and the surroundings follow PV=nRT.

The smallest particle of a substance has all of the physical and chemical properties of that substance.

An increase in pressure pushes the molecules closer together, reducing the volume. If the pressure is decreased, the gases are free to move about in a larger volume.

In the kinetic theory of gasses, increasing the temperature of a gas increases in average kinetic energy of the molecules, causing increased motion.

The reduction in the volume of the gas means that the molecules are striking the walls more often increasing the pressure, and conversely if the volume increases the distance the molecules must travel to strike the walls increases and they hit the walls less often thus decreasing the pressure.

At constant temperature and pressure the volume of a gas is directly proportional to the number of moles of gas. At constant temperature and volume the pressure of a gas is directly proportional to the number of moles of gas.

Learn more about molecules here:

https://brainly.com/question/14130817

#SPJ1

The pH of the resulting solution is approximately 1.81. I assumed that the volumes are additive and that the reaction between HCl and NaOH is complete.

The pH of a resulting solution can be calculated by considering the stoichiometry of the reaction between the acid (HCl) and the base (NaOH). The reaction between HCl and NaOH produces water and a salt, sodium chloride (NaCl).

To calculate the pH, we need to determine the concentration of the excess reactant after the reaction has occurred. In this case, HCl is in excess because its initial concentration is higher than that of NaOH.

Here are the steps to calculate the pH of the resulting solution:

1. Calculate the moles of HCl and NaOH used:
  - Moles of HCl = volume (in L) × concentration (in mol/L) = 0.034 L × 0.340 mol/L = 0.01156 mol
  - Moles of NaOH = volume (in L) × concentration (in mol/L) = 0.024 L × 0.440 mol/L = 0.01056 mol

2. Determine the limiting reactant:
  - Since the moles of NaOH are less than the moles of HCl, NaOH is the limiting reactant. This means that all of the NaOH will react, and some of the HCl will be left unreacted.

3. Calculate the moles of HCl remaining:
  - Moles of HCl remaining = moles of HCl initially - moles of NaOH used = 0.01156 mol - 0.01056 mol = 0.001 mol

4. Calculate the concentration of the HCl remaining:
  - Concentration of HCl remaining = moles of HCl remaining / volume of solution (in L) = 0.001 mol / (0.034 L + 0.024 L) = 0.0154 mol/L

5. Calculate the pH using the concentration of HCl remaining:
  - pH = -log[H+]
  - [H+] = concentration of HCl remaining = 0.0154 mol/L
  - pH = -log(0.0154) = 1.81 (rounded to two decimal places)

To know more about sodium chloride visit:-

https://brainly.com/question/14516846

#SPJ11

The car's displacement is 5 m downwards and the distance traveled is 5 m.

The displacement of the car is calculated as follows;

The displacement is the change in position of the car.

D = Δx

D = X2 - X1

D = 20 m - 15 m

D = 5 m downwards

The distance is path covered, and it has no direction.

Distance = 20 m  - 15 m = 5 m

Thus, the car's displacement is 5 m downwards and the distance traveled is 5 m.

Learn more about distance and displacement here: https://brainly.com/question/2109763

#SPJ1