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True [87]
3 years ago
15

What will a balloon do to a cloth if its negatively charged

Chemistry
1 answer:
masya89 [10]3 years ago
3 0

Answer:

This involves negatively charged particles (electrons) jumping to positively charged objects. When you rub the balloons against the fabric they become negatively charged. They take some of the electrons from the fabric and leave them positively charged.

Explanation:

Negative charges attract to positive charges. If a balloon is not rubbed with the wool cloth, it has an equal amount of negative to positive charges, so it will attract to a rubbed balloon. When both balloons are rubbed with the wool cloth, the both receive negative charges, so they will repel each other.

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What does a light bulb, a toaster, a radio, and a computer all have in common???
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The thing that they all have in common is that they all use electrical energy
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3 years ago
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A laser is emitting photons with a wavelength of 639.8 nm. What is the energy for 1 mole of these photons? For Planck's constant
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Answer:

The energy for 1 mole of these photons is E = 31 × 10^{-23} \frac{KJ}{mol}  

Explanation:

Given data

Wavelength \lambda = 639.8 × 10^{-9} m

Plank constant h = 6.626 × 10^{-34} J sec

Speed of light c = 3 × 10^{8} meter per second

We know that Energy  of a photon is given by

E = \frac{h c}{\lambda}

Value of ( h c ) = 6.626 × 10^{-34}  × 3 × 10^{8} = 19.878 × 10^{-26}

\lambda = 639.8 × 10^{-9} m

Now Energy  of a photon

E =( \frac{19.878}{639.8}) 10^{-17}

E = 0.031 × 10^{-17} Joule per mole

E = 31 × 10^{-23} \frac{KJ}{mol}  

Therefore the energy for 1 mole of these photons is E = 31 × 10^{-23} \frac{KJ}{mol}  

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4 years ago
A 951g sample of carbon steel with a specific heat capacity of .49j is heated to 673k and quenched in oil. The steel cools to 52
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H2(g) + ? O2(g) ? H2O(g) what is the correct coefficient for hydrogen gas?
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3 years ago
Question 20 a raindrop has a mass of 50.mg and the pacific ocean has a mass of ×7.081020kg . use this information to answer the
insens350 [35]
The questions you can answer are

1) what is the mass of one mole of raindrops?, and

2) How many moles of raindrops are in the pacific ocean

Solutions:

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mass = number of rain drops * mass of on rain drop

The number of rain drops in one mole of rain drops is 6.02 * 10^23

So, the mass of one mole of rain drops is

6.02 * 10 ^ 23 rain drops * 50. mg * (1 kg / 1,000,000 mg) = 3.01 * 10^ 19 kg

The correct number of significant digits is 2, because 50. mg has two signficant digits, so the answer must be shown as 3.0 * 10^ 19 kg.

2) How many moles of raindrops are in the pacific ocean

Use the proportion 1 mol / 3.0 * 10^19 kg = x mol / 7.08 * 10^20 kg

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4 years ago
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