How do we exist? What does scientific evidence suggest about the start of the universe?

Chemistry

1 answer:

kotykmax [81]3 years ago

4 0

Answer:

It all started with the big bang.

The big bang is how astronomers explain the way the universe began. It is the idea that the universe began as just a single point, then expanded and stretched to grow as large as it is right now (and it could still be stretching).

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What will be the result of the contraction of the universe?

lilavasa [31]

Answer:

formation of galaxies

may be i think

sorry if its wrong

6 0

2 years ago

Identify the molecules or ions below as Lewis acids, Lewis bases, or neither. If there is more than one possible site in the mol

oksano4ka [1.4K]

Answer: Neither

Explanation:

According to the Lewis concept, an acid is defined as a substance that accepts electron pairs and base is defined as a substance which donates electron pairs.

$CH_3CH_2CH_3$ is a hydrocarbon containing carbon and hydrogen, which have almost same electronegativity values. Thus is a non polar molecule.

It does not donate electrons as it does not contain any lone pair of electrons. It can not accept electrons as it's octet is already complete. Thus is neither a lewis acid nor a lewis base.

8 0

3 years ago

Calculate the number of atoms of copper represented by 127.08 g of copper. 1. 1.20 × 1024 atoms 2. 2.00 atoms 3. 1.30 × 1024 ato

chubhunter [2.5K]

Avagadros number states that 1 mol of any substance is made of 6.022 x 10²³ units.
1 mol of Cu is made of 6.022 x 10²³ atoms of Cu.
the molar mass of Cu is - 63.5 g/mol
63.5 g of Cu is made of 6.022 x 10²³ atoms of Cu
therefore 127.08 g of Cu contains - 6.022 x 10²³ atoms / 63.5 x 127.08
number of Cu atoms - 1.20 x 10²⁴ atoms of Cu
answer is 1) 1.20 x 10²⁴ atoms

7 0

3 years ago

Read 2 more answers

QUICK WILL MARK BRAINLIEST!!

Naddik [55]

Answer:

Explanation:

1.A-

2.B+

3.D2+

4.C2-

8 0