Determine the total volume of a balloon if it is inflated with 2.50g helium at 180C and 0.87atm.

pH= 11.332

KOH⇒K⁺+OH⁻

KOH(MW=56,1056 g/mol)

mol KOH :

[tex]\tt \dfrac{0.0256}{56.1056}=4.56\times 10^{-4}[/tex]

molarity KOH :

[tex]\tt \dfrac{4.56\times 10^{-4}}{0.212}=2.15\times 10^{-3}[/tex]

[OH⁻]=[KOH]=2.15 x 10⁻³

pOH=-log[OH⁻]

[tex]\tt pOH=-log~2.15\times 10^{-3}\\\\pOH=3-log~2.15\\\\pOH=2.668[/tex]

pH+pOH=14

[tex]\tt pH=14-2.668=\boxed{\bold{11.332}}[/tex]

Answer:

because its supose to be 3HCL+3AL___3ALCL+H³

Answer:

=242.47 g of HF

Explanation:

Answer:

yes

Explanation:

This can be fixed by multiplying the product contacting nitrogen by 2. o The new chemical equation is N2 +H2 →2 NH3 Reactants Products Nitrogen 2 2 Hydrogen 2 6 Since NH3 is multiplied by a coefficient of 2 there are now 2 nitrogens and 6 hydrogens. The 6 hydrogens come from the 2 multiplied by the subscript of 3.

Answer:

Luster: Metals are shiny when cut, scratched, or polished.

Malleability: Metals are strong but malleable, which means that they can be easily bent or shaped. ...

Conductivity: Metals are excellent conductors of electricity and heat.

Three properties of metals are:

Good conductors of electricity and heat: Metals have a high electrical and thermal conductivity, meaning they allow the flow of electricity and heat through them with ease. This property makes metals valuable in various applications, such as electrical wiring and heat transfer.

Malleability: Metals can be easily shaped and molded into various forms without breaking. They can be hammered, rolled, or pressed into thin sheets without losing their structural integrity. This property allows metals to be used in manufacturing processes and the creation of different products.

Ductility: Metals can be drawn into thin wires without breaking. This property makes them suitable for electrical wiring and cable manufacturing, where flexibility is required.

Learn more about Metals, here:

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Answer:

A: 60 hours

Explanation:

Answer:

1. suspencion

2.colloid

Explanation:

Answer:

Moritz is watching his little brother play in a mud puddle. Moritz notices that when his brother stirs it with a stick, after a few moments the dirt settles back to the bottom of the puddle. His brother is creating a SUSPENSION.

Anjali knows that whole milk has more fat than skim milk. However, the solid fat doesn’t seem to separate from the liquid milk even after it has been in the fridge for a few days. This is evidence that milk is a COLLOID.

Answer:

The answer is hydrogen ions

Answer:

a

Explanation:

Answer:

I believe it's one dot in an electron dot diagram (or rubidium)

Explanation:

I hope this helps

Answer:

i guess b is the answer.hope it will help

Answer:

yes

Explanation:

Answer:

Hydrogen chloride (HCl), a compound of the elements hydrogen and chlorine, a gas at room temperature and pressure. A solution of the gas in water is called hydrochloric acid.

Explanation:

hoped that helped

Answer:

The correct answer would be (d)- The amount of light we see on the moon is increasing

Explanation:

If I got this right then please give me brainliest! If not, let me know the correct answer......:)

Answer:

silver

Explanation:

Answer:

They propagate in materialistic media and non-materialistic media ( space ) .

They propagate in the space at constant velocity , which is 3 × 108 m/s .

They consist of vibrating electric and magnetic fields at certain frequency in phase with each other , perpendicular to each other and perpendicular to the direction of the wave propagation ...

Explanation:

welcome!

The properties of electromagnetic waves are the electromagnetic waves are propagated by oscillating electric fields and magnetic field oscillation at right angles to each other, These waves travel with speed 3×108ms−1 in vacuum. Therefore, option A and B are correct.

The term electromagnetic waves or EM waves are defined as the waves that are produced as a result of vibrations between an electric field and a magnetic field. In other words, EM waves are made up of oscillating magnetic and electric fields.

They are created in different processes and are detected in different ways, but they are not basically different. Radio waves, gamma-rays, visible light, and all the other parts of the electromagnetic spectrum are electromagnetic radiation.

Thus, option A and B are correct.

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Your question is incomplete, most probably your question was

Select the options that are properties of electromagnetic waves:

A. Electromagnetic waves are propagated by oscillating electric fields and magnetic field oscillation at right angles to each other.

B. These waves travel with speed 3×108ms−1 in vacuum.

C. They are deflected by electric or magnetic field.

D. They can not show interference or diffraction.

Answer:

Convection is a heat transfer mechanism where heat moves from one place to another through fluid currents. Forced convection is simply using this mechanism in a useful way to heat or cool a home efficiently, such as using a fan.

Explanation:

Answer:

I don't know if this is helpful. I'm sorry if it is not.

Answer:

The table shows element percentages for RaO (radium oxide).

Element %

O 6.61

Ra 93.39

Explanation:

Hope this helps - good luck ^w

Answer:

30

Explanation:

Given that;

  the compound contains nitrogen and oxygen in the ratio 1:1;

       We can say the compound is NO

Now,

Molecular mass of NO;

 Molar mass of N = 14g/mol

 Molar mass of O = 16g/mol

Molecular mass of NO = 14 + 16  = 30g/mol

Answer:

true

Explanation:

as you get closer to the center it gets hotter

Answer:

1. Co

2. C

3. Ba

Explanation:

Answer:

plasma membrane

Explanation:

Answer:

[tex]\%LiClO_3=90.4\%[/tex]

Explanation:

Hello!

In this case, since the undergoing chemical reaction is:

[tex]LiClO_4\rightarrow LiCl+\frac{3}{2} O_2[/tex]

It is widely known that when a gas given off from a reaction is collected over water, we can compute its pressure by minusing the total pressure 762 mmHg and the vapor pressure of water at the experiment's temperature (20 °C) in this case 17.5 mmHg as shown below:

[tex]p_{O_2}=762mmHg-17.5mmHg=744.5mmHg*\frac{1atm}{760mmHg}=0.980atm[/tex]

Next, by using the ideal gas equation we compute the yielded moles of oxygen considering the collected 313 mL (0.313 L):

[tex]n_{O_2}=\frac{PV}{RT}=\frac{0.980atm*0.313L}{0.082\frac{atm*L}{mol*K}*293.15K}\\\\ n_{O_2}=0.0128molO_2[/tex]

Now, via the 3/2:1 mole ratio between oxygen and lithium chlorate (molar mass = 90.39 g/mol), we compute the original mass of decomposed lithium chlorate as follows:

[tex]m_{LiClO_3}=0.0128molO_2*\frac{1molLiClO_3}{3/2molO_2}*\frac{90.39gLiClO_3}{1molLiClO_3} \\\\m_{LiClO_3}=0.771gLiClO_3[/tex]

Now, the percentage is computed as shown below:

[tex]\%LiClO_3=\frac{0.771g}{0.853g} *100\%\\\\\%LiClO_3=90.4\%[/tex]

Best regards!

Answer:

Wind flow and temperature

Explanation:

There is a answer on brainly to this question already

Answer:

I do K12 its wind flow and temp.

Hope this helps,

0Drink0Milk0

Answer:

ka = 2x10⁻⁹

Explanation:

Using the pH we can calculate the molar concentration of H⁺, [H⁺]

Then we use the expression of Ka for the equilibrium of a weak monoprotic acid:

HA ↔ H⁺ + A⁻

Where:

ka = [tex]\frac{[H^+][A^-]}{[HA]}[/tex]

ka =  [tex]\frac{(2.24*10^{-5})(2.24*10^{-5})}{0.25-2.24*10^{-5}}[/tex] =  2x10⁻⁹