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MrMuchimi
3 years ago
13

What is the mass of ethanol thats exacly fills a 200.0ml container

Chemistry
1 answer:
yaroslaw [1]3 years ago
3 0

Answer:

158g

Explanation:

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Steven Ginsberg named managing editor of The Washington Post, rounding out senior management team
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2 years ago
How did thompson know the charge of the particle he discovered was negative?
bulgar [2K]

Answer:

Explanation:

The electron is subatomic particle that revolve around outside the nucleus and has negligible mass. It has a negative charge.

Symbol= e-

Mass= 9.10938356×10-31 Kg

It was discovered by j. j. Thomson in 1897 during the study of cathode ray properties.

He constructed the glass tube and create vacuum in it. He applied electric current between electrodes. He noticed that a ray of particles coming from cathode to wards positively charged anode. This ray was cathode ray.

Properties of cathode ray:

The ray is travel in straight line.

The cathode ray is independent of composition of cathode.

When electric field is applied cathode ray is deflected towards the positively charged plate.

Hence it was consist of negatively charged particles.

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3 years ago
Which chemical agent is thought to be associated with "runner's high"?
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2 years ago
How many ions form when 39 grams of calcium fluoride are added to excess water? a. 0.50 mol b. 1.0 mol c. 1.5 mol d. 3.0 mol
agasfer [191]

Answer:

c. 1.5 mol

Explanation:

  • Firstly, we need to calculate the no, of moles of 39.0 grams of calcium fluoride.

n = mass / molar mass = (39.0 g) / (78.07 g/mol) = 0.499 mol ≅ 0.5 mol.

  • CaF₂ ionized in water as:

<em>CaF₂ → Ca⁺² + 2F⁻.</em>

Every 0.1 mole of CaF₂ is ionized to 3 ions (1 ion of Ca⁺² and 2 ions of F⁻).

<em>So, 0.5 mol of CaF₂ will contain (3 x 0.5 mol = 1.5 mol) of ions.</em>

Thus, the right choice is "c. 1.5 mol".

6 0
3 years ago
Read 2 more answers
Two or more substances that are blended together but not chemically combined make up a(n) _____.
Dahasolnce [82]
Make up a mixture.

Example is water and sand, it is blended together but not chemically. It is by physical combination of just addition of the two substances.

But if it elements are chemically combined a compound would be formed.
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