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m_a_m_a [10]
3 years ago
11

Calculate the pH of a solution in which [OH–] = 4.5 × 10–9M.

Chemistry
1 answer:
posledela3 years ago
7 0

Answer:

5.65 is the pH.

Explanation:

I am assuming that you are asking for confirmation on your answer. The answer is 5.65.

You would do:

[pOH] = -log[OH-]

          = -log[4.5*10^-9]

         equals about 8.3468

To find pH your would subtract the pOH from 14.

14-8.3468 = 5.65 << Rounded to match the answer choices.

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Arrange the following in order of increasing
Reptile [31]

Answer:

Explanation:

The increasing order of energy of electromagnetic radiations is,

Radio wave∠ micro waves ∠ infrared radiations ∠ visible light ∠ ultraviolet ∠ x-rays ∠ gamma rays

1) visible radiation, ultraviolet radiation, infrared radiation, microwaves, x-rays

microwaves ∠ infrared radiation ∠  visible radiation ∠ ultraviolet radiation ∠ x-rays

2) microwaves, ultraviolet radiation, visible  radiation, infrared radiation, x-rays

microwaves ∠ infrared radiation ∠  visible radiation ∠ ultraviolet radiation ∠ x-rays

3) microwaves, infrared radiation, visible radiation, ultraviolet radiation, x-rays

microwaves ∠ infrared radiation ∠ visible radiation∠  ultraviolet radiation, ∠ x-rays

4) x-rays, microwaves, visible radiation, infrared radiation, ultraviolet radiation

microwaves ∠ infrared radiation ∠ visible radiation∠  ultraviolet radiation, ∠ x-rays

5) . infrared radiation, visible radiation, ultraviolet radiation, microwaves, x-rays

microwaves ∠ infrared radiation ∠ visible radiation∠  ultraviolet radiation, ∠ x-rays

7 0
3 years ago
Can anyone help me with the calculations for the Frequency, Wavelength, Energy Chart?
sergeinik [125]
Use the following equations to fill the chart.

E = hf
where
h = 6.63 x 10⁻³⁴ J/s, Planck's constant
f = frequency Hz
E = quanta of energy, J

c = fλ
where
c = 3 x 10⁸ m/s, the velocity of light
λ = wavelength, m

If energy is given in J/mmol, divide by Avogadro's number, N = 6.02 x 10²³, to convert it to J.

The completed table is shown below.

3 0
3 years ago
You prepare a 2nd solution (solution B) by pipetting 10.00 ml of your 1st solution (solution A) into a 50.00 ml volumetric flask
elena-14-01-66 [18.8K]

Answer:

Concentration solution A was 0.5225 M

Explanation:

10.00 mL of solution A was diluted to 50.00 mL and yields 50.00 mL of solution B

According to laws of dilution-      C_{A}V_{A}=C_{B}V_{B}

where, C_{A} and C_{B} are concentration of solution A and B respectively

V_{A} and V_{B} are volumes of solution A and B respectively

Here C_{B} = 0.1045 M, V_{B} = 50.00 mL and V_{A} = 10.00 mL

Hence, C_{A}=\frac{C_{B}V_{B}}{V_{A}}=\frac{(0.1045M\times 50.00mL)}{10.00mL}=0.5225M

So, concentration solution A was 0.5225 M

8 0
3 years ago
I NEED HELP PLEASE!!!!!
lisov135 [29]
Atoms can be divided more so thats not true. atoms from the same element arent all nesacarly identical because of isotopes
7 0
2 years ago
Read 2 more answers
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elena-14-01-66 [18.8K]

Colligative properties are those substances that depend on the number of substances in the solution, not in the identity of that substance. The property changes the way that it does when the amount of solute is increased because it enables the solute to be scattered more. For example, the freezing point of salt water is lower than that of the pure water due to the salt ions present in water.

6 0
2 years ago
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