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Burka [1]
3 years ago
10

Please help with 3 and 4

Chemistry
1 answer:
mafiozo [28]3 years ago
7 0
3. volume of gas because its changing because of the temperature
4. 67.6 breaths per minute
     65+73+67+71+62=338/5=67.6
                                           ^because there are five terms that we added
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Anton [14]

1 gram of carbon = 12 atoms ..

As per u r question..

28.5 × 12 = 342..

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6 0
3 years ago
in the reaction, 2h2 o2 --&gt; 2h2o, how many hydrogen molecules are needed to produce two water molecules?a. 1b. 2c. 3d. 4
natali 33 [55]
The balanced reaction between Hydrogen and Oxygen to form Water:

 2H₂ + O₂  →  2H₂O

From the equation it already states that:

2 molecules of Hydrogen H₂ are needed to produce 2 molecules of Water H₂O

So the answer is 2.

Option B.
7 0
3 years ago
Read 2 more answers
Which statement describes sunspots? A.Sunspots have a bright white appearance. B.Sunspots occur in the radiative zone of the sun
Ugo [173]

Answer:

The statements that describe sunspots is;

D. Sunspots have lower temperatures than their surroundings

Explanation:

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Therefore, the statement that best describe sunspots is that a sunspot is a region of reduced temperature compared to surrounding areas on the Sun's surface.

8 0
3 years ago
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castortr0y [4]
The compound that was formed by the reaction of the first oxygen released by Cyanobacteria and iron are the metals of the earths crust. Cyanobacteria was the first organisms that used water instead of hydrogen sulfide or other compounds as a source of electrons and hydrogen for fixing carbon dioxide. Early Cyanobacteria inhabited marine sediments where Archean banded iron formations were deposited; consisting of reddish layers rich in iron oxide. 
7 0
4 years ago
What gas is stored in gas cylinders? <br>​
Igoryamba

Answer: Oxygen, Nitrogen, And Nitrous Oxide

Explanation:

Oxygen, Nitrogen, And Nitrous Oxide Are Just Some Of The Gasses Stored In Gas Cylinders,

4 0
3 years ago
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