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Alisiya [41]
3 years ago
9

Why do we observe national day​

Chemistry
1 answer:
WITCHER [35]3 years ago
5 0

A national day is a day on which celebrations mark the nationhood of a nation or state. It may be the date of independence, of becoming a republic, or a significant date for a patron saint or a ruler (such as a birthday, accession, or removal). The national day is often a public holiday.

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If you breathe out 0.3 moles of carbon dioxide, how many molecules of carbon dioxide did you breathe out?
pochemuha

Explanation:

1 mole of C molecules contain=6.023×10^23

0.3 moles of C=6.023×10^23/1×0.3

=1.8×10^23 of C molecules

sorry..not sure

4 0
3 years ago
Fluorine is a gas and iodine is a solid, yet all halogens are non-polar and would interact with London dispersion forces. This i
attashe74 [19]

Answer:

the molecules of each substance attract each other through dispersion (London) intermolecular force.whether a substance is solid, liquid or gas depends on the balance between the kinetic energies of the molecules and their intermolecular attractions.

thank you.

6 0
3 years ago
What is a type of friction that is caused by air resistance
Ann [662]

Answer:

Fluid Friction

Explanation:

Fluid friction involves a fluid or air. The air resistance on an airplane or water resistance on a boat is fluid friction. Rolling Friction - Rolling friction occurs when a round surface rolls over a surface, like a ball or wheel.

7 0
4 years ago
Read 2 more answers
Is hydrogen sulfide a heterogeneous mixture solution compound or element?
AleksandrR [38]

Hydrogen sulfide is a  <u>compound</u>

<h3>Explanation</h3>

A compound is a substance composed of two or more element  in a fixed  proportion and it can be separated   into simpler substance   and element  only by chemical  method. Hydrogen sulfide is a chemical compound with H2S formula.

7 0
3 years ago
Calculate the volume of 1 M NaOH needed to prepare 10.0 ml of a 0.10 M solution.
Mumz [18]
Answer is: <span>volume of 1 M NaOH is 1 ml.
</span>c₁(NaOH) = 1 M.
V₂(NaOH) = 10 ml.
c₂(NaOH) = 0,1 M.
V₁(NaOH) = ?
c₁ - original concentration of the solution, before it gets diluted.
c₂ - final concentration of the solution, after dilution.
V₁ - <span>volume to be diluted.
V</span>₂ - <span>final volume after dilution.
c</span>₁ · V₁ = c₂ · V₂.
V₁(NaOH) = c₂ · V₂ ÷ c₁.
V₁(NaOH) = 0,1 M · 10 ml ÷ 1 M.
V₁(NaOH) = 1 ml.
7 0
3 years ago
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