10. A water molecule is made up of one oxygen atom and two hydrogen atoms. Why is water
considered a
pure
substance?
1 point
M
A. Water can be broken down by physical means.
B. Water can be combined with other substances by physical means.
C. Each water molecule is identical.
D. Water molecules are made up of different types of atoms

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:

C metallic bond is the answer

Answer:

plasma membrane

Explanation:

Answer:

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

Answer:

C

Explanation:

Option C: They are all matter, they have mass, take up space and are made of atoms

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:

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

Explanation:

I hope this helps

Answer:

yes

Explanation:

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:

[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:

The answer is hydrogen ions

Answer:

a

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.

To learn more about an electromagnetic wave, follow the link;

https://brainly.com/question/21106663

#SPJ6

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:

7.3

Explanation:

Answer:

silver

Explanation:

Answer:

A proton carries a positive charge and an electron carries a negative charge

Explanation:

is this what u want???

Answer:

=242.47 g of HF

Explanation:

Answer:

spectral emission lines from hydrogen atoms

Explanation:

Answer:

Explanation:here’s the diagramm somebody help

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:

true

Explanation:

as you get closer to the center it gets hotter

Answer:

A: 60 hours

Explanation:

Answer:

1. Co

2. C

3. Ba

Explanation:

Answer:

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

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:

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