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VMariaS [17]
3 years ago
11

a ceiling fan's blades collect dust faster than other objects in a room. the constant pushing and rubbing against the air provid

e a cool breeze for the people in the room. what causes the ceiling fan´s blade to collect dust so quickly.
Chemistry
1 answer:
Black_prince [1.1K]3 years ago
8 0

As the blades rotate, they experience frictional forces as they `rub' against the air; this knocks electrons around, causing the blades to build up a net charge. The charged dust particles then stick to the charged areas of the blades. "The leading edge of the blades usually develops the thickest layer of dust.

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How many moles of ammonia can be formed from 4.0 mol H2
Bess [88]

Answer: 1. 2.7 moles  of ammonia are formed

2. 12.0 moles  of hydrogen are required

3. 2.0 moles of nitrogen are required

Explanation:

The balanced chemical equation is:

N_2+3H_2\rightarrow 2NH_3

According to stoichiometry:

3 moles of hydrogen form = 2 moles of ammonia

Thus 4.0 moles of hydrogen form =\frac{2}{3}\times 4.0=2.7moles of ammonia

According to stoichiometry:

2 moles of ammonia are formed by = 3 moles of hydrogen

Thus 8.0 moles of ammonia are formed by  =\frac{3}{2}\times 8.0=12.0moles of hydrogen

According to stoichiometry:

3 moles of hydrogen react with = 1 mole of nitrogen

Thus 6.0 moles of hydrogen react with =\frac{1}{3}\times 6.0=2.0moles of nitrogen

3 0
2 years ago
Select all the characteristics that will probably yield an ionic bond. Each answer refers to two atoms, Atom X and Atom Y. Atom
Debora [2.8K]
C high en high en is your answer
6 0
3 years ago
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Answer:

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7 0
3 years ago
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3
Zina [86]

Answer:

Explanation:

n CaCO3 = mass / m.wt

             = 500  /( 40 + 12 + 16x 3)

           =   5 mole

n CaO = 5 moles  ( from the balanced equation we have 1:1 moles )

mass of CaO = nCaO X m.wt

                       5 x(  40 +16 )

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5 0
3 years ago
Does anybody know the answer to these two questions ?
Serjik [45]
the first is hydroxide. I believe d is the second one but I'm not 100% positive so you may want to get a second opinion
4 0
3 years ago
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