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uysha [10]
3 years ago
7

How many electrons does an atom have if the atomic number is 11?

Chemistry
1 answer:
xenn [34]3 years ago
8 0
There are 11 electrons
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3. A representation of one unit of KCl in water is shown below. (The water molecules are intentionally not shown.)
alukav5142 [94]

The representation is showing potassium atom (K) and Chlorine atom (Cl) when it ought to show their ions i.e potassium ion (K⁺) and Chlorine ion (Cl¯)

<h3>Dissociation equation for KCl</h3>

When potassium chloride, KCl dissolves in water, it dissociate to produce potassium ion (K⁺) and Chlorine ion (Cl¯) as shown below:

KCl(aq) —> K⁺(aq) + Cl¯(aq)

The representation given in the question is only showing potassium atom (K) and Chlorine atom (Cl). This makes it wrong as dissolution of ionic compounds in water will results in the corresponding ions of the element that makes up the compound

Please see attached photo

Learn more about dissociation equation:

brainly.com/question/25854432

7 0
3 years ago
A gas system has volume, moles and temperature of 9040 mL, 0.447 moles and -35.50 oC, respectively. What is the pressure in atm?
babymother [125]

Answer : The pressure of the gas is, 0.964 atm

Solution : Given,

Volume of gas = 9040 ml = 9.040 L        (1 L = 1000 ml)

Moles of gas = 0.447 moles

Temperature of gas = -35.50^oC=237.5K       (0^oC=273K)

Using ideal gas equation,

PV=nRT

where,

P = pressure of the gas

V = volume of the gas

T = temperature of the gas

n = number of moles of gas

R = gas constant = 0.0821Latm/moleK

Now put all the given values in this formula, we get the pressure of the gas.

P(9.040L)=(0.447moles)\times (0.0821Latm/moleK)\times (237.5K)

By rearranging the terms, we get

P=0.964atm

Therefore, the pressure of the gas is, 0.964 atm

7 0
3 years ago
How hot Will a 2.3L balloon have to get to expand to a volume of 250L?
KIM [24]

it never will, it will pop

5 0
3 years ago
What is the mass in grams of 1.204 x 1024 molecules of
natulia [17]
The answer is C) 4.03 g
3 0
3 years ago
What is kinetic energy of a 100 kg object that is moving with a speed of 15 m/s
elena-s [515]

Answer:

16875 Joules

Kg m^2 s^-2 = Joule ,so The kinetic energy of a body of mass 150 Kg moving at 15m/s is 16875 Joules.

Explanation:

6 0
3 years ago
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