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mrs_skeptik [129]
3 years ago
9

How many valence electrons does Arsenic have?

Chemistry
1 answer:
adoni [48]3 years ago
4 0
Arsenic's atomic number is 33.

Hence his electronic configuration is 1s^22s^22p^63s^23p hence his valence electrons are 4s^24p^3.

5 valence electrons
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How many moles of ions are there in 3 moles of calcium chloride?
klemol [59]

Answer:

9 moles of ions

Explanation:

Our compound is: CaCl₂(s)

We dissociate it:

CaCl₂(aq) → Ca²⁺ (aq) + 2Cl⁻(aq)

Per 1 mol of chloride, we have 1 mol of calcium cation and 2moles of chlorides, so in total we have 3 moles of ions.

Therefore in 3 moles of chloride, we would have 9 moles of ions (3 . 3)

5 0
4 years ago
A chemistry student conducted several different procedures. Which of the following procedures best demonstrates the law of conse
Vsevolod [243]

Answer:

combining 2 grams of copper and 4 grams of sulfur to make 6 grams of copper sulfate

Explanation:

The Law of Conservation of Mass states that matter cannot be created or destroyed in chemical reactions. It posits that the mass of a substance remains unchanged after undergoing a chemical process.

Therefore, according to the question, the procedure that best demonstrates the law of conservation of mass after the chemistry student conducted different procedures is option D.

This is because, the mass of copper and sulfate did not change but merely combined to form a compound.

7 0
3 years ago
If the specific heat of water is 4.18 3/g*^ C much heat is required to increase the temperature of 12 g of water from 23 degrees
12345 [234]

Answer:

Q = 802.6 J

Explanation:

Given data:

Specific heat capacity of water = 4.18 J/g.°C

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Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 39°C - 23°C

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3 0
3 years ago
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lbvjy [14]
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7 0
4 years ago
Read 2 more answers
What attractive forces must be overcome when CsI is dissolvedin<br> liquid HF?
bagirrra123 [75]

Answer:

The attractive forces must be overcome are :

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  • Dipole - Dipole  
  • Hydrogen Bonding  

Explanation:

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Forces in HF <em>:</em>

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2. Dipole - dipole : <em>HF is polar . So it is a permanent dipole and has dipole diople interaction</em>

4 0
3 years ago
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