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siniylev [52]
3 years ago
12

Please somone help me with a chemistry question brainliest to whoever answers correctly and 20 points

Chemistry
2 answers:
valentina_108 [34]3 years ago
4 0

Answer:

Explanation:

Hope this helps u !!

Zina [86]3 years ago
3 0

Answer:

3132 is the answer

Explanation:

3BaCl2 + Al2S3 → 3BaS + 2AlCl3

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PLEASE HELP 20 points
777dan777 [17]

  n = 1.5atm (15L) / .0821 (280k) = .98 mol NaCl

  NaCl = 22.99g Na + 35.45g Cl = 58.44g NaCl

  58.44g NaCl x .98 mol NaCl = 57.27g NaCl

Explanation:

hope you get it right :)

4 0
2 years ago
Look at the rock sitting on the hill in the picture above. Gravity should make the rock slide down the hill. What force is actin
nexus9112 [7]

I believe the answer you are looking for is Static Friction. Static Friction is the force that holds an object in place until it starts to move. Then it switches to rolling friction.

For example, if you have a 1/2 ton truck sitting in front of you and the truck is in neutral. (meaning it can roll if pushed). The truck is extremely hard to move at first. That is because static friction is holding it in place until the amount of force exceeds the limit of static friction.

So if we continue to push at the truck and you feel it starting to move, then once it starts moving it is much easier to push, that is because we moved past static friction to rolling friction. Rolling friction is what helps slow things down. If you roll a ball across a carpet floor it eventually comes to a stop.

5 0
3 years ago
Read 2 more answers
Question 2
Pavel [41]
Tearing paper, Physical Change
6 0
3 years ago
Two sound waves are emitted from identical sources at the same time. They each travel a distance of 10 m, but one wave reaches t
kompoz [17]

Answer:

<em>Varying frequency</em> between both waves accounts for difference in speed.

Explanation:

The speed of a wave is dependent on four major factors:

  1. wavelength
  2. frequency
  3. medium, and
  4. temperature 

Assuming equal temperature and medium of travel of these sound waves, and given that the wavelength (that is distance of travel) is equal, the only varying factor would be their frequency.

Wave speed is calculated by multiplying the wavelength times the frequency

⇒ Speed = λ * <em>f</em>

4 0
3 years ago
Read 2 more answers
Which type of reaction occurs in the following? 2HgO(s) 2Hg(l) + O2(g)
melomori [17]
A.a decomposition reaction
8 0
3 years ago
Read 2 more answers
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