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slamgirl [31]
3 years ago
5

How many moles of tungsten (W,183.85 g/lol are in 415 grams of tungsten?

Chemistry
1 answer:
vladimir1956 [14]3 years ago
7 0

Given mass of tungsten, W = 415 g

Molar mass of tungsten, W = 183.85 g/mol

Calculating moles of tungsten from mass and molar mass:

415 g * \frac{1 mol}{183.85 g} = 2.26 mol W

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adelina 88 [10]
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3 0
3 years ago
A chemist determines by measurements that 0.0550 moles of nitrogen gas participate in a chemical reaction. Calculate the mass of
shtirl [24]

The mass of nitrogen gas that participated in the chemical reaction is 1.54g

HOW TO CALCULATE MASS OF AN ELEMENT:

  • Mass of a substance can be calculated by multiplying the number of moles in mol of the substance by its molecular mass in g/mol. That is;

  • mass (M) = molar mass (MM) × number of moles (n)

According to this question, a chemist determines by measurements that 0.0550 moles of nitrogen gas (N2) participate in a chemical reaction.

  • The molecular mass of nitrogen gas (N2) = 14.01(2)

= 28.02g/mol

Hence, the mass of the nitrogen gas that participated in the chemical reaction is calculated as follows:

  • Mass (g) = 0.0550 mol × 28.02 g/mol

  • Mass = 1.5411

Therefore, the mass of nitrogen gas that participated in the chemical reaction is 1.54g

Learn more: brainly.com/question/18269198

6 0
2 years ago
n a semiconductor, the bonding molecular orbitals that contain electrons are referred to as the ________, while the antibonding
Kruka [31]

Answer:

In a semiconductor, the bonding molecular orbitals that contain electrons are referred to as the valence band, while the antibonding orbitals that are completely empty are referred to as the conduction band.

The conduction band occupies a higher energy level than the valence band. The band gap is what separates the two orbitals.

3 0
2 years ago
Help please !
AURORKA [14]

Answer:

false

true

true

Explanation:

false - changing the hypothesis to meet your needs is not a good researcher

true - when you can further analyze and explain then you have a successful experiment even if it's not what you expected

true - successful experiments do not end there. they can lead to more in depth questions.

8 0
2 years ago
Balance the reaction ____Mo+___O2> ___MoO3​
DIA [1.3K]

The balanced reaction is: 2Mo+3O2>2MoO3

7 0
2 years ago
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