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Vitek1552 [10]
2 years ago
9

125) How many known elements are on the periodic table?

Chemistry
2 answers:
guajiro [1.7K]2 years ago
5 0

Answer:

125) 118

126) 6

127) 9

128) Au

Explanation:

timurjin [86]2 years ago
5 0

Explanation:

125)118

126)6

127)9

128)Au

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Dafna1 [17]
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6 0
2 years ago
Someone please answer the question attached.
nikdorinn [45]

Answer:

Option ( 1 )

Explanation:

This atom has a cub close pack structure, and therefore - the number of edge center present in X atoms =  4,

Number of unit cells present in X atoms = 6

____________________________________________________

Now the 6th coordination number of X atom = 6 * 4 = 24,

So respectively, the 3rd coordination number of X = 8 -

And thus the ratio between the 6th coordination number and the 3rd coordination number = 24 / 8 = 3,

Option ( 1 )

<u><em>Hope that helps!</em></u>

5 0
3 years ago
What is the volume of a balloon containing 0.75 moles of gas at STP?
disa [49]

Answer:

V = 16.81 L

Explanation:

Given data:

Number of moles = 0.75 mol

Temperature = standard = 273 K

Pressure = 1 atm

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 rearrange the formula.

V = nRT/P

V = 0.75 mol ×0.0821 atm.L/mol.K ×273 K / 1 atm

V = 16.81 atm.L/ 1 atm

V = 16.81 L

6 0
3 years ago
How many moles of water, H2O, contain 2.0×1022 molecules of water?
zimovet [89]
<span>Should be 3.2*10^-2 moles</span>
6 0
3 years ago
Give the word and chemical equations (including state symbols) for the reaction of potassium and water
zepelin [54]

Answer:

Zinc is Zn and Magnesium is Mg

7 0
3 years ago
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