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ICE Princess25 [194]
3 years ago
13

What is the potential energy of a 2-kg vase sitting on a table with a height of 1 meter?

Chemistry
1 answer:
lisov135 [29]3 years ago
7 0

"20 J" is the "Potential Energy" of "vase" on the table.  

<u>Explanation</u>:

The body possess some energy according to the position of the object that is the when an object is placed at a height it stores some energy it is called "Potential Energy".

Formula used to calculate the "Potential Energy" is m\times g \times h

Where, "m" is mass of vase is given that 2 kg, "g" is acceleration due to gravity is 10 m/s^2 and "h" is height of the object where it placed is 1 m.

Substitute the given values in the formula,

Potential energy of the vase = 2\times10\times1

Potential energy of the vase = 20 J

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Tris has a molecular weight of 121 g/mol. How many grams of Tris would you need to make 100 mL of a 100 mM solution of Tris
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Answer:

1.21 g of Tris

Explanation:

Our solution if made of a solute named Tris

Molecular weight of Tris is 121 g/mol

[Tris] = 100 mM

This is the concentration of solution:

(100 mmoles of Tris in 1 mL of solution) . 1000

Notice that mM = M . 1000  We convert from mM to M

100 mM . 1 M / 1000 mM = 0.1 M

M = molarity (moles of solute in 1 L of solution, or mmoles of solute in 1 mL of solution). Let's determine the mmoles of Tris

0.1 M = mmoles of Tris / 100 mL

mmoles of Tris = 100 mL . 0.1 M → 10 mmoles

We convert mmoles to moles → 10 mmol . 1mol / 1000mmoles = 0.010 mol

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0.010 mol . 121 g /mol = 1.21 g

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3 years ago
Developing countries use many more resources than do developed countries. True False
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Consider the molecule BF3. (a) What is the electron config- uration of an isolated B atom? (b) What is the electron con- figurat
anzhelika [568]

For the given molecule, we are asked to give-

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as atomic number of B is 5

electronic configuration will be [He] 2s² 2p¹

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as atomic number of F is 9

electronic configuration will be  [He] 2s² 2p5

  • Hybrid orbitals should be constructed on the B atom to make the B–F bonds in Boron tri flouride will be sp2.

as the one s and two of p orbital from the valance shell will hybridised to make 3 hybrid orbital of B resulting in 3 B-F bonds.

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brainly.com/question/23038117

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When 0.513 g of biphenyl (c12h10 undergoes combustion in a bomb calorimeter, the temperature rises from 26.3 ?c to 29.7 ?c?
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