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ArbitrLikvidat [17]
1 year ago
11

Circle the correct one from given alternatives.

Chemistry
2 answers:
Sindrei [870]1 year ago
8 0
Question: what is the number of electrons in A1+ ?

My guess would be

Letter (a) 24

mash [69]1 year ago
3 0

Answer:

24 is the correct anwer

this the anwer text this u no

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A rock that weighs 12.2 g is added to a graduated cylinder with 30.0 mL of water in it. The meniscus rises to 54.4 mL. What is t
GuDViN [60]

Answer:

              0.50 g/mL

Explanation:

Formula of Density,

                          D = mass / volume

Mass = 12.2 g

Volume = 54.4 mL - 30.0 mL = 24.4 mL

Putting values,

                          D = 12.2 g / 24.4 mL

                          D = 0.50 g/mL

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Kinetic energy is from speed, motion, and mass while potential energy is stored energy
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The upper surface of the zone of saturation is called the water table
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8. A 220 mL sample of helium gas is in a cylinder with a movable piston at 105 kPa and 275K. The piston
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The sample has a new pressure of 274kPa. If at 105 kPa and 275K, a 220 mL sample of helium gas is contained in a cylinder with a moving piston. The sample is pushed till it has a 95.0 mL volume and 310K .

The macroscopic characteristics of ideal gases are related by the ideal gas law (PV = nRT). A gas is considered to be perfect if its particles (a) do not interact with one another and (b) occupy no space (have no volume). Where P= pressure  V= volume and T = temperature.

From ideal gas equation

P₁V₁/T₁ =P₂V₂/T₂

105×220÷275 = P₂ ×95÷310

P₂= (105×220×310)÷(275×95)

P2= 7161000/26125

P2 = 274.105 kPa

Hence, the new pressure of helium gas is 274kPa

To know more about Ideas gas equation

brainly.com/question/28837405

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