1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Harlamova29_29 [7]
3 years ago
14

How does the periodic table indicate the number of valence electrons element has?

Chemistry
1 answer:
Yuri [45]3 years ago
7 0

option A.

The number of valence electrons of an element can be determined by the periodic table group (vertical column) in which the element is categorized

You might be interested in
Solution of known concentration is called​
Vesna [10]

Answer:

standard solution

Explanation:

4 0
2 years ago
List five ways you use chemistry at home or school ?
Nat2105 [25]
1. cooking
2. cleaning
3.you use chemistry in science class (a.k.a. science experiments)
4. at your job depending on were you work
5 0
3 years ago
A distance of one centimeter is the same as ?
rodikova [14]
C because its meters right
4 0
3 years ago
Two star systems are part of a ________________ system formation.
Radda [10]

Binary Stars I think

hope this is right and helps

5 0
2 years ago
A student who is performing this experiment pours an 8.50 mL sample of the saturated borax solution into a 10 mL graduated cylin
gtnhenbr [62]

Answer:

ksp = 0,176

Explanation:

The borax (Na₂borate) in water is in equilibrium, thus:

Na₂borate(s) ⇄ borate²⁻(aq) + 2Na⁺(aq)

<em>When you add just borax, the moles of Na²⁺ are twice the moles of borate²⁻, that means 2borate²⁻=Na⁺ </em><em>(1)</em>

The ksp is defined as:

<em>ksp = [borate²⁻] [Na⁺]²</em>

Then, borate²⁻(B₄O₇²⁻) reacts with HCl thus:

B₄O₇²⁻ + 2HCl + 5H₂O → 4H₃BO₃ + 2Cl⁻

The moles of HCl that reacts with B₄O₇²⁻ are:

0,500M×0,01200L = 6,00x10⁻³ mol of HCl

As two moles of HCl react with 1 mol of B₄O₇²⁻, the moles of B₄O₇²⁻ are:

6,00x10⁻³ mol of HCl×\frac{1molB_{4}O_{7}^{2-}}{2molHCl} = <em>3,00x10⁻³ mol of B₄O₇²⁻</em>

For (1), moles of Na⁺ are <em>3,00x10⁻³ mol ×2 = 6,00x10⁻³ mol of Na⁺</em>

The [borate²⁻] is <em>3,00x10⁻³ mol of B₄O₇²⁻/0,00850L = </em><em>0,353M</em>

And [Na⁺] is <em>6,00x10⁻³ mol of Na⁺ / 0,00850L = </em>0,706M

Replacing in the expression of ksp:

ksp = [0,353] [0,706]²

<em>ksp = 0,176</em>

<em></em>

I hope it helps!

8 0
3 years ago
Other questions:
  • A sample of nitrogen gas was collected via water displacement. since the nitrogen was collected via water displacement, the samp
    9·1 answer
  • What would happen to the block if it had a density of 0.500 kg/L and was placed in the same 100.0 L tank of water?
    14·2 answers
  • A 50/50 blend of engine coolant and water (by volume) is usually used in an automobile's engine cooling system. If a car's cooli
    11·1 answer
  • If all carbon dioxide coming out of volcanoes were to remain in the atmosphere, what further effect would this have on Earth’s t
    8·1 answer
  • How many moles are equivalent to 365 g of aluminum chloride? Using the dimensions analysis. Show work
    7·1 answer
  • What variable represents specific heat in the equation Q = mCAT?
    5·1 answer
  • The purpose of a car engine is to transform the chemical energy of gasoline into kinetic energy of the car in motion. Gasoline
    15·1 answer
  • Which one of the following produces hydrogen ions in a water solution?
    7·1 answer
  • For the following reactions, write a balanced equation using half-reactions and calculate the voltage to be expected.
    5·1 answer
  • What volume (ml) of fluorine gas is required to react with 1. 28 g of calcium bromide to form calcium fluoride and bromine gas a
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!