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Alja [10]
4 years ago
7

HELP PLEASE !!!!

Chemistry
2 answers:
love history [14]4 years ago
7 0
<span>Answers are:
-4 for C in CH4, because carbon has greater electronegativity than hydrogen and he attracts shared electrons.
</span><span>+4 for C in CO2, because carbon has smaller electronegativity than oxygen.
</span><span>+1 for H in both CH4 and H2O, because hydrogen has amaller electronegativity than both carbon and oxygen. 
</span>
notka56 [123]4 years ago
5 0

It’s the first, second, and fourth options. Hope it helps ^^

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At 45.2 L cylinder containing C2H2F4 at a pressure of 3.00 atm is connected by the valve to 4060 mL cylinder containing N2H4 at
puteri [66]

The partial pressure of the N2H4 gas  is 1.50 atm.

<h3>Dalton's law of partial pressure</h3>

From the Dalton's law of partial pressure, the total pressure of a mixture of gases is the sum of the individual partial pressures of all the gases present in the mixture.

We have the following;

C2H2F4  =  3.00 atm

N2H4 = c

Total pressure = 3.00 atm + 1.50 atm = 4.50 atm

Hence, the partial pressure of the N2H4  is N2H4.

Learn more about partial pressure: brainly.com/question/14623719

7 0
2 years ago
Consider a hexagonal close-packed unit cell as shown here.
Alenkinab [10]
Sorry, but I can't help unless you post a diagram or picture. If you can't, what about a written description?
7 0
4 years ago
Low-density polyethylene is formed because _______ polymerization is very unpredictable and difficult to control.
Harlamova29_29 [7]

Answer:

radical-initiated

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Radical-initiated polymerization is unpredictable and difficult to control. The reaction proceeds indiscriminately and produces shortened chains, loops, and branches that create holes in the polymer. This reduces its mass to volume ratio.

7 0
3 years ago
What information can a foliated metamorphic rock provide you about the conditions under which it formed?
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A foliated rock forms when the minerals are realigned due to the presence of high temperature and pressure. The minerals align in such a way that the axes are directed to where the pressure was applied.
4 0
3 years ago
A motorist discovers that her auto tire measures 29.2 psi rather than the recommended 35 psi. If the tire’s volume is assumed co
I am Lyosha [343]

Answer:

  0.20 moles

Explanation:

The pressure is proportional to the quantity of gas at a given temperature and volume. So, the quantity needs to be increased by a factor of ...

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The fractional increase required is ...

  1.19863 -1 = 0.19863

__

The quantity of air currently in the tire is ...

  1 mol·519.67°R/(atm·23.6442 L) × (29.2/14.7 atm) × (11.6 L) / (45+459.67)°R

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so we need to add ...

  (fraction to add) × (current quantity) = amount to add

  0.19863 × 1.0035 mol = 0.1993 mol = amount to add

About 0.20 moles of air must be added to the tire to bring the pressure up.

5 0
3 years ago
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