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hichkok12 [17]
3 years ago
11

How are elements organized in the periodic table

Chemistry
2 answers:
mash [69]3 years ago
7 0
Elements are arranged from left to right and top to bottom in order of increasing atomic number
omeli [17]3 years ago
5 0
The elements are organized by their atomic number
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I need help with electron affinity chemistry problem. I’m having a tough time.
ExtremeBDS [4]

Answer:

Br Be Ge

Explanation:

Increases in electron affinity

5 0
3 years ago
What type of reaction occurs between aqueous ammonia solution and an acid?
gizmo_the_mogwai [7]
Neutralization reaction.
8 0
3 years ago
Read 2 more answers
2Al(s)+Fe2O3(s) → Al2O(s)+2Fe(s) with a delta H=-847 KJ.
Scrat [10]

∆H for given reaction -847kJ

  • As it's negative reaction is exothermic

So

2 mol of Al releases 847KJ heat

4 mol Al releases

  • 2(847)
  • 1694KJ

∆H=-1694KJ

5 0
2 years ago
How many hydrogen atoms are in 5.80 mol of ammonium sulfide
IRINA_888 [86]

Moles of ammonium sulfide =  5.80 mol

The formula of ammonium sulfide is (NH₄)₂S

So each molecule of ammonium sulfide has (4 x 2)  or 8 atoms of H

One mole of ammonium sulfide has 8 moles of H

5.80 mol of ammonium sulfide has (8 x 5.8) or 46.4 moles of H

As per the definition of Avogadro's number, 1 mole = 6.022 x 10²³ atoms

46.4 moles of H x (6.022 x 10²³ atoms/ 1 mole of H)

= 2.8 x 10²⁵ H atoms

Therefore, 2.8 x 10²⁵ H atoms are in 5.80 mol of ammonium sulfide.

5 0
3 years ago
When the final velocity is less than the initial velocity, this is speed time acceleration deceleration
WITCHER [35]

Hello!

When the final velocity is less than the initial velocity, this is deceleration

<h2>Why?</h2>

Acceleration is defined as the physical magnitude that measures the change in velocity with time. The units to express acceleration are speed over time.

The equation for acceleration is: a=\frac{v-v_o}{t-t_o}

Where: a=acceleration, v=final velocity, vo=initial velocity, t=final time, to=initial time.

If the final velocity is less than the initial velocity, then the acceleration is negative, and that is called deceleration. An example of this is when a car brakes.

Have a nice day!



6 0
3 years ago
Read 2 more answers
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