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2 years ago

J.J. Thomson's plum pudding model of the atom followed the discovery of

Chemistry

2 answers:

bixtya [17]2 years ago

6 0

Answer:

Explanation:

Got it right:)

Rama09 [41]2 years ago

3 0

The answer is A i think from the options though the answers are worded a bit weird

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How much force is needed to accelerate a 1000-kg car at a rate of 3 m/s2? a 1003 N b 0.003 N c 3000 N d 333.3 N

Bogdan [553]

Answer:

Option c.

Explanation:

According to Newton's law, formula to solve this problem is:

F = m . a

Mass → 1000 kg

a → 3 m/s²

F = 1000 kg . 3m/s² → 3000 N

1 N = 1 kg . m/s² according to SI, Internation System of units.

7 0

2 years ago

Which list shows the phases of matter in order from the greatest average kinetic energy to the least average kinetic energy per

avanturin [10]

Answer:

Explanation:

3 0

2 years ago

Write the formulae for the following and calculate the molecular mass for each one of them,

tatuchka [14]

Explanation:

a) NaHCO₃

= 23 + 1 + 12 + 16×3

= 23 + 1 + 12 + 48

= 84 g/mol

b) CaO

= 40 + 16

= 56 g/mol

c) NaCl

= 23 + 35.5

= 58.5 g/mol

8 0

3 years ago

A neutral atom in the ground state of Sulfur has its outer most valence electron in which orbital? f d

Natasha_Volkova [10]

<u>Answer:</u> The outermost valence electron enters the p orbital.

<u>Explanation:</u>

Valence electrons are defined as the electrons which are present in outer most orbital of an atom.

Sulfur is the 16th element of the periodic table having 16 electrons.

Electronic configuration of sulfur atom is $1s^22s^22p^63s^23p^4$

The number of valence electrons are 2 + 4 = 6

These 6 electrons enter s-orbital and p-orbital but the outermost valence electron will enter the p-orbital.

Hence, the outermost valence electron enters p orbital.

3 0

3 years ago

Is CaC1 a ionic , Polar covalant or non polar covalent ?

patriot [66]

Polar Covalent.

This is because both Calcium (Ca) and Carbon (C) are non metals, thus eliminating the ionic option.

It is polar covalent rather than nonpolar covalent due to the fact that the electrons in a polar covalent bond are shared unequally while those in a nonpolar bond are shared equally.

This can be determined by looking at the amount of valence electrons; if the electrons cancel each other out, it is shared equally. If not, it is shared unequally.

Hope this helps!

5 0

2 years ago