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professor190 [17]
4 years ago
5

Why does the second row of the periodic table not have a d block section

Chemistry
1 answer:
Dmitry [639]4 years ago
7 0

Answer:

Explanation:

There is only room for eight electrons in the second electron shell, so there can only be eight elements in this period, and no room for another section.

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Which atoms have the highest electromagnitivity
nekit [7.7K]

Answer:

atomic mass numbers? 23.23.233232323

Explanation:

4 0
4 years ago
A sample of an ideal gas has a volume of 0.500 L at 25 degrees celcius and 1.20 atm pressure. What is its volume at 75 degrees c
NemiM [27]
The ideal gas law is PV= nRT.
First you need to manipulate the equation to splice for volume,
Which will be V= nRT/P

Now you need to input the numbers for each variable. Make sure to remember what the value R equals and it’s units. R= 0.08206 L•atm/n•K
4 0
3 years ago
Classify lead: Select one: C = compound HE = heterogeneous mixture S = homogeneous mixture/solution E = element
Ira Lisetskai [31]

Lead is an E (element) and can be found on the periodic table.

5 0
3 years ago
You draw back on the piston of a pump and the volume of air in the pump doubles. Which of the following happens?
ohaa [14]

Answer: The correct answer is Option C.

Explanation:

We are given a piston of a pump, which means that there is no loss of the air. and there is a change in pressure and volume but temperature of the system remains constant.

As, the pressure of the system increases, there will be more number of particles. So, the number of collisions per unit area will increase.

\text{Number of collisions}\propto \text{Pressure}

But in the question, volume gets doubled. So, the pressure will be determined by using Boyle's Law:

P\propto \frac{1}{V}

V_2\rightarrow 2V_1

where, V_1\text{ and }V_2 are the initial and final volume respectively.

Putting the change in volume in above equation, we get:

P_2=\frac{1}{2V_1}\\\\P_2=\frac{1}{2}P_1

where, P_1\text{ and }P_2 are the initial and final pressure respectively.

As, the pressure is reduced to half of the initial pressure. So, the number of collisions per unit area will also be reduced to one-half.

Hence, the correct answer is Option C.

5 0
3 years ago
Read 2 more answers
0.785 moles of N2,fill a balloon at 1.5 atm and 301 K.<br> What is the volume of the balloon?
Tcecarenko [31]

Answer:

V = 12.93 L

Explanation:

Given data:

Number of moles = 0.785 mol

Pressure of balloon = 1.5 atm

Temperature = 301 K

Volume of balloon = ?

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

Now we will put the values.

V = nRT/P

V = 0.785 mol × 0.0821 atm.L/ mol.K × 301 K / 1.5 atm

V = 19.4 L /1.5

V = 12.93 L

7 0
3 years ago
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