CHEMISTRY HIGH SCHOOL

The conductors in electrical devices are commonly made of
a. iron.,B.nickel.,C.Cooper.,D.lead.

Answers

Answer 1
Answer: Copper - it is bendy can conduct very well and is running out
Answer 2
Answer:

Answer:

Copper

Explanation:

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You fill a rigid steel cylinder that has a volume of 20.0 L with nitrogen gas to a final pressure of 2.00 *10^4 Kpa at 28c How many kilograms of N2 does the cylinder contain

Answers

The quantity of nitrogen the cylinder contains is 4477.8 g

What is pressure?

Pressure is a force exerted in a perpendicular direction in any item.

By ideal gas law

PV = nRT

P =(w)/(M) =(RT)/(V)\n

w = mass

Volume is 20.0 l

Pressure is  2.00 * 10^4 \;Kpa

The molar mass of nitrogen is 28 g/mol

R is gas constant = 0.0821

Temperature is 28 converted into kelvin that is 301 k

Putting the values

197.6 =(w)/(28) =(0.0821 * 301 )/(20\;l)\n\nw = 4477.8 g

Thus, the mass of nitrogen is 4477.8 g.

Learn more about pressure, here:

brainly.com/question/356585

Answer : The mass of N_2 gas is, 4477.8 g

Solution :

using ideal gas equation,

PV=nRT\n\nP=(w)/(M)* (RT)/(V)

where,

n = number of moles of gas

w = mass of gas

P = pressure of the gas = 2* 10^4Kpa=197.6atm

conversion :1atm=101.2Kpa

T = temperature of the gas = 28^oC=273+28=301K

M = molar mass of N_2 gas = 28 g/mole

R = gas constant = 0.0821 Latm/moleK

V = volume of gas = 20 L

Now put all the given values in the above equation, we get the mass of gas.

197.6atm=(w)/(28g/mole)* (0.0821Latm/moleK* 301K)/(20L)

w=4477.8g

Therefore, the mass of N_2 gas is, 4477.8 g

Which subatomic particles orbit the nucleus

Answers

the answer is electrons
Electrons are that sub-atomic particles

44 points! Will medal!3. A calorimeter contains 500 g of water at 25°C. You place a hand warmer containing 200 g of liquid sodium acetate inside the calorimeter. When the sodium acetate finishes crystallizing, the temperature of the water inside the calorimeter is 39.4°C. The specific heat of water is 4.18 J/g-°C. How much energy was needed to heat the water?

Answers

A calorimeter contains 500 g of water at 25°C.....

the temperature of the water inside the calorimeter is 39.4°C.....

The specific heat of water is 4.18 J/g-°C.

energy needed to heat the water = specific heat * mass * temp difference

= 4.18 J/g-°C * 500 g * (39.4°C - 25°C)

= 4.18*500*14.4

= 30096J

or approx. 30kJ

Energy=specific heat of water x mass of water x water's temperatures

=4.18x500x(39.4-25)

=30096J

Why must soft iron be used with an electromagnet?

Answers

The soft iron inside the coil makes the magnetic field stronger because it becomes a magnet itself when the current is flowing. Soft iron is used because it loses its magnetism as soon as the current stops flowing.

Answer: it is easily magnetized

Explanation:

Every action produces an equal and opposite -- ---------- when one object exterts a force on another object,the second object pushes back with the same amount of--------- someone knows the answer​

Answers

The answer will be Reaction, second will be force

What does it mean for a weak acid to be in equilibrium

Answers

Weak acid dissociates partially in water to form hydronium ion and conjugate base of the acid. Since the acid is weak the conjugate base is strong. Acetic acid is a weak acid which dissolves in water to form hydronium ion and acetate ions (conjugate base).  

CH₃COOH + H₂O → H₃O⁺ + CH₃COO⁻

When an uncharged weak acid is added to water, a homogeneous equilibrium forms in which aqueous acid molecules, HA(aq), react with liquid water to form aqueous hydronium ions and aqueous anions, A-(aq). The latter are produced when the acid molecules lose H+ ions to water.
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