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Blizzard [7]
2 years ago
8

Why do elements in the same group on the periodic table tend to have similar physical and chemical properties?.

Chemistry
1 answer:
m_a_m_a [10]2 years ago
5 0

Answer:

In chemistry, a group is a vertical column in the periodic table of the chemical elements. ... Each element within a group has similar physical or chemical properties because of its atom's outermost electron shell (most chemical properties are dominated by the orbital location of the outermost electron).

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When a particle is moving fast it has a lot of kinetic energy in it. ?
Sever21 [200]

Answer:

Random particle motion in liquids and gases is a difficult concept for in temperature, the particles move faster as they gain kinetic energy.

Explanation:

3 0
3 years ago
Why are fungi more closely related to animals than they are to plants?
liraira [26]

the answer maybe B or A

7 0
3 years ago
What is the frequency of a radio wave with a a wavelength of 3 m? (Hint: MHz
Ostrovityanka [42]

Answer:
a. 1 x 10^8

Explanation:

100 MHz = 100,000,000 Hz = 10^8 Hz

4 0
2 years ago
Consider the reaction 4Fe(s) + 3O2(g) --> 2Fe2O3(s) How many grams of oxygen are needed to produce 12.5 g of Fe2O3 (iron(III)
vlabodo [156]

Answer:

3.76 g of O₂ are needed to produced 12.5 g of Fe₂O₃

Explanation:

The reaction is:  4Fe (s) + 3O₂ (g)  →  2Fe₂O₃ (s)

4 moles of iron react to 3 moles of oxygen in order to produce 2 moles of iron (III) oxide.

Let's determine the moles of the produced product.

12.5 g . 1mol/ 159.69g = 0.0783 moles

If we assume Iron in excess, we work with the oxygen.

2 moles of Fe₂O₃ are produced by 3 moles of oxygen

Then, 0.0783 moles of Fe₂O₃ might be produced by (0.0783 . 3)/2

0.117 moles.

We convert the moles to mass → 0.117 mol . 32 g/1mol = 3.76 g

3 0
2 years ago
How many moles of H2O are produced when 25.6. grams of oxygen are used? Thank you
jeka94

Answer:

1.6mole of H2O

Explanation:

First let us generate a balanced equation for the reaction. This is illustrated below:

2H2 + O2 —> 2H2O

Molar Mass of O2 = 2 x 16 = 32g/mol.

Mass of O2 = 25.6g

Number of mole of O2 = Mass /Molar Mass

Number of mole of O2 = 25.6/32

Number of mole O2 = 0.8mol

From the equation,

1mole of O2 produced 2moles H2O.

Therefore, 0.8mol of O2 will produce = 0.8 x 2 = 1.6mole of H2O

3 0
3 years ago
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