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Nookie1986 [14]
3 years ago
6

9. A student observed the following reaction:

Chemistry
1 answer:
Gelneren [198K]3 years ago
8 0

Answer:

The substance that remained on the filter paper is Al(OH).

Explanation:

  • Filter paper is the substance that is used in laboratory to separate the solid objects. It doesn't filter aqueous and gaseous products.
  • So in our experiment the product formed is aluminum hydroxide Al(OH)   and sodium chloride (NaCl).
  • Between two products, sodium chloride is in aqueous form as indicated in the question. So it wont remain in the filter paper.
  • Hence aluminum hydroxide being only solid product remains on the filter paper.
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The temperature of a system rises by 45°C during a heating process. Express this rise in temperature in Kelvin. (Round the final
postnew [5]

Answer:

45K

Explanation:

Rise in temperature = Final - initial temperature.

temperature in K = Temperature in Celsius + 273

for Celsius; T2 -T1 =45°C

for kelvin; T2+273 -(T1+273) = ?

                T2+273 -T1-273 =?

                T2-T1 = ?

               T2-T1 =45k

hence ΔT(K) = ΔT(°C) (temperature difference in Celsius is equal to temperature difference in kelvin)

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3 years ago
3. What are vaccines? Are there different types?​
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4 0
4 years ago
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A 1.50-kilogram ball is attached to the end of a 0.520-meter string and swung in a circle. The velocity of the ball is 9.78 m/s.
Sedaia [141]

Answer:

F centripetal force (tension) = 275.9  N

Explanation:

Given data:

Mass = 1.50 kg

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Solution:

F centripetal force (tension) =  m.v² / R

F centripetal force (tension) = 1.50 kg . (9.78 m/s)² / 0.520 m

F centripetal force (tension) = 1.50 kg . 95.65 m²/s² / 0.520 m

F centripetal force (tension) = 143.5 kg. m²/s² / 0.520 m

F centripetal force (tension) = 275.9  N

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