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Firdavs [7]
3 years ago
9

Please help! I'm confused on a few of these, 100 points!

Chemistry
2 answers:
Aliun [14]3 years ago
3 0
I cannot see the picture
Kryger [21]3 years ago
3 0
Reupload ^^ there’s no picture
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Which of the following are excited in ultraviolet photoelectron spectroscopy?
zavuch27 [327]

Answer:

D. Valance Electrons

Explanation:

6 0
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Chlorine has two isotopes. The isotope with a mass of 34.969 amu has a relative abundance of 75.77%. The isotope with a mass of
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34.969*.7577+36.966*.2433=35.489
5 0
3 years ago
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A solid with a density of 3.57g/mL and mass of 19.5g is added to a graduated cylinder that contain 23.2mL of water. What is the
NNADVOKAT [17]

Answer:

Volume of liquid = 28.7 mL

Explanation:

Given data;

Density of solid = 3.57 g/ml

Mass of solid = 19.5 g

Volume of water = 23.2 mL

Total volume when solid is dropped into graduated cylinder= ?

Solution:

Density = mass/ volume

v = m/d

v = 19.5 g/ 3.57 g/ml

v = 5.5 mL

Volume of liquid = volume of water + volume of solid

Volume of liquid = 23.2 mL + 5.5 mL

Volume of liquid = 28.7 mL

3 0
3 years ago
Which is more volatile benzene or toluene?
oee [108]
Benzene is more volatile.
4 0
3 years ago
What is the answer please
xeze [42]

Answer:

Selenium

Explanation:

Oxygen is present in the group sixteen.

This group consist of oxygen, sulfur, selenium, tellurium and polonium.

All of these have same number of valance electrons thus they show similar properties.

From the given list of elements only selenium is belong to oxygen family thus it has properties similar to the oxygen.

Electronic configuration of oxygen:

O = [He] 2s² 2p⁴

Electronic configuration of selenium:

Se = [Ar] 3d¹⁰ 4s² 4p⁴

While aluminium, boron and phosphorus are belongs to other groups that's why their properties are not similar to the phosphorus.

phosphorus is present in group 15.

Boron and aluminium are present in group 13.

6 0
3 years ago
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