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Katarina [22]
3 years ago
13

What would be the mass of a 40 cm3 piece of manganese?

Chemistry
2 answers:
kiruha [24]3 years ago
8 0

Answer:

Manganese is a mineral that is found in several foods including nuts, legumes, seeds, tea, whole grains, and leafy green vegetables. It is considered an essential nutrient, because the body requires it to function properly. People use manganese as medicine. Idek.

Digiron [165]3 years ago
6 0
1.738 g/cm<span>3 is the density of magnesium just multiply it you will get 69.52g.That's my final answer.</span>
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Neon effuses 1.26 times as fast an an unknown gas at a particular temperature. What is the molar mass of the unknown gas
Svetach [21]

Answer:

31.75 amu

Explanation:

Using Graham's equation of effusion as depicted below:

V1/V2 = √m2/√m1

Where; v1 = speed of neon gas

V2 = speed of unknown gas

m1 = molar mass of neon gas

m2 = molar mass of unknown gas

According to this question: v1 = 1.26x, m1 = 20amu, v2 = 1x, m2 = ?

Hence,

1.26x/1x = √m2/√20

1.26/1 = √m2/4.472

√m2 = 4.472 × 1.26

√m2 = 5.635

m2 = 5.635²

m2 = 31.75 amu

Therefore, the molar mass of the unknown gas is 31.75 amu.

8 0
4 years ago
Complete the mechanism for the acid-catalyzed hydrolysis of the epoxide in alcohol by adding any missing atoms, bonds, charges,
Sauron [17]

Answer:

See explanation below

Explanation:

You are missing the structure, therefore, I will do an example with one that I found on another place to try to explain.

This acid mechanism always involves carbocations, and positive charges, never negative because we are in acidic mediums.

In the first step, the lone pairs of the oxigen from the epoxide, substract one hydrogen of the reactant.

Second step, the lone pairs of the oxygen from the reactant, do a nucleophylic attack to the carbon of the epoxide. In this case, it will do it to the most substitued carbon.

Then, in the third step by acid base equilibrium, the hydrogen from the reactant that attacked, is substracted from the molecule by a molecule of water (We are in acid medium, therefore, there is traces of water) and the final structure is formed.

Check picture for mechanism:

4 0
3 years ago
During which phase of mitosis do the sister chromatids pull apart?
antoniya [11.8K]

Answer:

<h2>Anaphase</h2>

Explanation:

<h3>Hope it will help you</h3>
7 0
3 years ago
Read 2 more answers
A car travels 75 mi/hr. How many hours will it take to travel 837 km? (Pick the answer closest to the correct answer,
nlexa [21]

Answer:

6.9 hours

Explanation:

In order to solve this problem we'll<u> convert 837 km to miles</u> (another option would be to convert 75 mi/hr to km/hr). To make said conversion we'll use the given <em>conversion factor</em>:

  • 837 km * \frac{1mi}{1.61km} = 519.88 mi

Finally we <u>calculate the time required to travel said distance</u> at a constant speed of 75 mi/hr:

  • 519.88 mi ÷ 75 mi/hr = 6.9 hr
5 0
3 years ago
Where are people mostly exposed to chemicals?
Vlad [161]

Answer:

people are mostly exposed to chemicals through their nose, mouth, eyes, and ears

Explanation:

they are the easiest way for anything, bad or good, to enter the body because  people touch their face alot.

This might not answer what you were looking for but the other answer covered it pretty well so I thought I'd give you another angle to the question!

Hope this helps!!

4 0
3 years ago
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