What is an aquifer mean

Chemistry

2 answers:

Kruka [31]4 years ago

8 0

An aquifer is a permeable rock which can contain or transfer water.

Mashcka [7]4 years ago

4 0

An aquifer is a permeable rock which contains or give/transfer water

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Harvey kept a balloon with a volume of 348 milliliters at 25.0˚C inside a freezer for a night. When he took it out, its new volu

katrin2010 [14]

Answer:

$T2=276K$

Explanation:

Given:

Initial volume of the balloon V1 = 348 mL

Initial temperature of the balloon T1 = 255C

Final volume of the balloon V2 = 322 mL

Final temperature of the balloon T2 =

To calculate T1 in kelvin

T1= 25+273=298K

Based on Charles law, which states that the volume of a given mass of a ideal gas is directly proportional to the temperature provided that the pressure is constant. It can be applied using the below formula

$(V1/T1)=(V2/T2)$

T2=( V2*T1)/V1

T2=(322*298)/348

$T2=276K$

Hence, the temperature of the freezer is 276 K

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3 years ago

What would the answer to the following conversion problem be? 96 ft x 1 yd 3 ft

andrew-mc [135]

Answer:

c) 32yd

Explanation:

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3 years ago

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If a lab group were using hydrochloric acid to perform a substitution reaction, which precaution would not be a concern?

Pie

The question is incomplete. Complete question is attached below:
...............................................................................................................................

Correct Answer: Option A i.e Flammability

Reason:

Hydrochloric acid is a strong acid. It has a high value of dissociation constant. Following equilibrium is established with HCl is dissolved in water

HCl + H2O ↔ Cl- + H3O+

Above, reaction is highly exothermic in nature. So care must be taken while preparing HCl solution of desired concentration. HCl must be added in beaker containing water. Reversed, i.e. adding water in HCl, must never be done. This is because when acid is poured into water, it flows down the flask and mixes much efficiently and no boiling occurs. On other hand, when water is added to acid, the very first drop of water will react with acid. The heat generated during this event might be high enough to boil the water instantly, which could spray acid out of the container.

The physical contact with concentration HCl will result in skin burn. As well, inhaling HCl vapors can cause burns to body tissues, lung damage and even death in extreme cases. Also, since HCl is a strong acid, it would undergoes reaction almost spontaneously, which would inturn favour substitution reaction. However, HCl is not a flammable gas. Hence, it is of no concern while performing substitution reaction.