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AnnyKZ [126]
3 years ago
13

Help on my homework

Chemistry
1 answer:
Illusion [34]3 years ago
3 0

Bronchi

Bronchioles

Alveoli

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What happens to temperature when there is a State of Change
son4ous [18]

Answer:

Hello There!!

Explanation:

The temperature stays the same when a solid is melting or a liquid is boiling (changing state) during a change of state, even though heat energy is being absorbed.

hope this helps,have a great day!!

~Pinky~

4 0
3 years ago
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Which of the following is an example of an exothermic reaction? silt settling out of muddy water, bubbles forming in soda, photo
Rudik [331]
Fireworks
An exothermic reaction is one where the products have lower energy than the reactants, so the reaction yields energy. The chemical compounds present in firework fuel release a lot of energy upon oxidation. Photosynthesis is endothermic, settling of silt is not a chemical reaction, it is a physical change. Finally, the bubble formation in soda is not exothermic; otherwise, the sodas would become very hot very fast.
4 0
3 years ago
This is hard, isn't it? please help me though. PLEASE
Liono4ka [1.6K]
I think it might be A. i am not totally sure though
6 0
2 years ago
A soft silvery metal has two naturally occurring isotopes: mass 84.9118, accounting for 72.15% and mass 86.9092, accounting for
zloy xaker [14]

Answer: The atomic weight of the metal would be 85.47.

Explanation:

Mass of isotope 1 of metal = 84.9118

% abundance of isotope 1 of metal = 72.15% = \frac{72.15}{100}

Mass of isotope 2 of metal= 86.9092

% abundance of isotope 2 of metal = 27.85% = \frac{27.85}{100}

Formula used for average atomic mass of an element :

\text{ Average atomic mass of an element}=\sum(\text{atomic mass of an isotopes}\times {{\text { fractional abundance}})

A=\sum[(84.9118)\times \frac{72.15}{100})+(86.9092)\times \frac{27.85}{100}]]

A=85.47

Therefore, the atomic weight of the metal would be 85.47.

6 0
3 years ago
If the empirical formula of a compound is CH2, which of the following could be a possible molecular formula for this
DiKsa [7]

Answer:

C2H2

Explanation:

8 0
3 years ago
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