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vesna_86 [32]
3 years ago
14

The elements in groups 1a through 7a are

Chemistry
2 answers:
Semmy [17]3 years ago
4 0

1A alkali metals

2A alkali earth metals

3B-2B transition metals

7A halogens

8A noble gases

REY [17]3 years ago
3 0
The elements in<span> groups 1a through 7a are called d. representative elements. The periodic table is organized according to increasing order of the atomic number of the elements. Groups have similar properties while the period of the elements determines the valence electrons in the outer shells.</span>
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A sample of sulfurous acid (H2SO3) has a mass of 1.31 g.
lakkis [162]

Answer:

a) 2 (H+) ions

b) 1 (SO3²-) ions

c) 1.36 × 10^-22 grams.

Explanation:

According to this question, sulfurous acid has a chemical formula; H2SO3. It is made up of hydrogen and sulfite ion. Hydrogen ion (H+) is the cation while sulfite ion (SO32-) is the anion.

Based on the chemical formula, there are 2 moles of hydrogen ions that reacts with 1 mole of sulfite ion as follows:

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c) The mass of one formula unit of H2SO3 is calculated thus:

= 1.008 (2) + 32.065 + 15.999(3)

= 2.016 + 32.065 + 47.997

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82.08 a.m.u = 82.08/6.02 × 10^-23

= 13.6 × 10^-23

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6 0
3 years ago
Which of the following atoms will not react with water​
Sati [7]

Answer:

Among Na ,K , Pb , Li , The atom which does not react with water is :

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You and your friend live in different states and plant identical hydrangea bulbs in your garden. When they bloom, you send each
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The more acid the bluer in terms of hydrangea flowers if there was a balance between the two it will be half and half of the two colors.

3 0
3 years ago
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A Snickers bar contains 27.0 g of sugars (carbohydrates), 4.0 g of protein and 12.0 g of fat. How many food calories (Cal) are c
amm1812

Answer:

There are 232 calories in the bar

Explanation:

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27*4=108\\4*4=16\\12*9=108\\108+108+16=232

4 0
3 years ago
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