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Lilit [14]
2 years ago
11

4) Type only the NUMBER answer to the question below (no units). Your

Chemistry
1 answer:
Nataliya [291]2 years ago
3 0
(4.5 x 10^24 molecules) x (60.013 g / 6.022 x 10^23) = 448 grams or 4.484 x 10^2 grams = Answer
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The excessive demand of energy leads to......​
dem82 [27]

Answer:

industrial activity

Explanation:

3 0
3 years ago
In a reaction between calcium hydroxide, Ca(OH)2, and lithium sulfide, Li2S, which of the
wolverine [178]

Answer:

CaS calcium sulfide

Explanation:

hydroxides are insoluble except with group 1 like the lithium,

sulfides are insoluble in water and with calcium either

so CaS is insoluble

6 0
3 years ago
In the electrolysis of water, how long will it take to produce 165.0 L of H2 at 1.0 atm and 273 K using an electrolytic cell thr
vladimir2022 [97]

In the electrolysis of water,  3490 hour will it take to produce 165.0 L of H2 at 1.0 atm and 273 K using an electrolytic cell through which the current is 113.0 mA.

<h3>What is Ideal Gas Law ?</h3>

The ideal gas law states that the pressure of gas is directly proportional to the volume and temperature of the gas.

It is expressed as

PV = nRT

where,

P = Pressure

V = Volume in liters

n = number of moles of gas

R = Ideal gas constant

T = Temperature in kelvin

Here,

P = 1.0 atm

V = 165.0 L

R = 0.0821 atm. L/mol.K (Ideal gas constant)

T = 273 K

n = ?

Now put the value in above expression, we get

PV = nRT

1.0 atm × 165.0 L = n × 0.0821 atm. L/mol.K × 273 K

165.0 atm. L = n × 22.4  atm. L/mol

n = \frac{165.0\ \text{atm. L}}{22.4\ \text{atm. L/mol}}

n = 7.36 mol

The reaction is

2H⁺ + 2e⁻ → H₂

1 mol of electrons is produced from 96500 C

So,

96500 \frac{C}{\text{mol} \times e} \times 2e \times 7.36\ \text{mol}

<em>= </em>1,420,480 C

<u>Convert milliampere to C/s</u>

1mA = 0.001 C/s

113.0 mA = 113.0 × 0.001

               = 0.113 c/s

<h3>What is relationship between current, charge and time ?</h3>

The relation between current, charge and time is expressed as:

I = \frac{Q}{t}

where,

I = Current

Q = Charge in Coulomb

t = time

Now put the value in above formula we get

I = \frac{Q}{t}

  = \frac{1,420,480\ C}{0.113\ C/s}

  = 12,570,619.469 s

  = 3490 hour

Thus from the above conclusion we can say that In the electrolysis of water,  3490 hour will it take to produce 165.0 L of H2 at 1.0 atm and 273 K using an electrolytic cell through which the current is 113.0 mA.

Learn more about the Ideal Gas Law here: brainly.com/question/25290815

#SPJ4

5 0
2 years ago
Name the type of equation shown here:<br><br> 4C5H9O + 27O2 ---&gt; 20CO2 + 18H2O
BartSMP [9]
The correct answer is a Combustion Reaction.
8 0
4 years ago
Planck's constant relates the Joules of energy absorbed/released by matter to the:
Alexxx [7]
The right answer for the question that is being asked and shown above is that: "B. observed wavelength of light" Planck's constant relates the Joules of energy absorbed/released by matter to the <span>B. observed wavelength of light</span>
7 0
3 years ago
Read 2 more answers
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