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Semenov [28]
4 years ago
8

When a solution is diluted with water, the ratio of the initial to final

Chemistry
2 answers:
Sindrei [870]4 years ago
5 0

hi there

You're answer would be true

Hope this answer correct

Bas_tet [7]4 years ago
3 0
Hello!!

The correct answer for this problem would be TRUE.

Explanation: it is true that when a solution is diluted with water, the ratio of the initial to final volumes of solution is equal to the ratio of final to initial molarities.
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Which is the best piece of equipment to use to measure exactly 4.0 mL of a liquid?
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A Glass pipet

Explanation:

The best laboratory equipment to measure out exactly 4.0mL of a liquid is a pipet.

The pipet is a glass tube with a suction as tthe top.

  • It is designed for measuring small units of volume accurately.
  • Once dipped into the fluid, the suction is pressed and the liquid gushes in.
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3 years ago
What would be the mass of 9.03*10^21 molecules of hydrobromic acid
Fynjy0 [20]

Answer:

2.11 g hydrobromic acid (correct to 3SF)

Explanation:

Molecular formula of hydrobromic acid = C2H5BrO2

mass of C2H5BrO2 = 140.96g

Beginning with what we're given, 9.03*10^21 we then make a conversion by using Avegadro's number which is 6.02*10^23 per mole (Oct. 23 at 6:02 am is national mole day :) Then, we need to convert out of moles, 140.96g hydrombromic acid per mole.

It looks like this:

9.03*10^21 molecules • (1 mol C2H5BrO2 / 6.02*10^23 molecules) • (140g C2H5BrO2 / 1 mol) = 2.1144 g C2H5BrO2

3 0
3 years ago
Oxygen, o, (number 8), sulfur, s, (number 16), and selenium, se, (number 34) have such similar chemical properties because?
irga5000 [103]

Oxygen (O), Sulphur (S) and Selenium (Se) have similar chemical properties because they all have the same number of electrons in their outermost shells.

Atoms with the same number of electrons in their outermost shells can be found in the same group.

A group consists of elements arranged in the same column (from top to bottom) on the periodic table. Elements on the same group have similar chemical properties.

Oxygen (O), Sulphur (S) and Selenium (Se) are in group eight. All three elements are highly electronegative and have 6 electrons in their outermost shell. They also carry ab charge of -2.

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5 0
2 years ago
The absorption spectrum of neon has a line at 633 nm. What is the energy of this line? (The speed of light in a vacuum is 3.00 x
timurjin [86]

Answer:

B

Explanation:

E = hc/\lambda. Remember, it is in meters not nanometers so you have to convert. You end up with B.

7 0
3 years ago
Why was the international system of units adopted?
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