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vlada-n [284]
3 years ago
14

The combustion of hydrogen and oxygen is commonly used to

Chemistry
1 answer:
posledela3 years ago
5 0

Answer:

6.66 mol

Explanation:

(atm x L) ÷  (0.0821 x K)

(0.875 x 250) ÷  (0.0821 x 400)

=6.66108

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Calculate the average atomic mass of element X using the table below. Then use the periodic table to identify the element. Separ
Ksenya-84 [330]

Answer:

126.8, Iodine

Explanation:

  • mass ×abundance/100
  • (126.9045×80.45/100)+(126.0015×17.23/100)+(128.2230×2.23/100)
  • 102.1+21.7+3=126.8

<em>IODINE</em><em> </em><em>has</em><em> </em><em>an</em><em> </em><em>atomic</em><em> </em><em>mass</em><em> </em><em>of</em><em> </em>126.8 or 126.9

4 0
3 years ago
Based on the information above, which statement provides evidence that a chemical reaction has occurred?
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Explanation:

A chemical reaction is the process of breaking down the chemical bonds of the reacting substances  which are commonly called as reactants and making new bonds to form new substances commonly called as products.

The products will contain the same atoms as there are in the reactants but the bonds will rearrange to form different substances.

Every chemical reaction is accompanied with absorption or release of energy.

3 0
3 years ago
Can you think of any practical reasons why you might want to know if there is carbon dioxide in air mixtures? please help
san4es73 [151]
Yes.  carbon dioxide is deadly and i want to get away from it fast.
8 0
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33. Hydrocarbons that release pleasant odors are called_________<br> hydrocarbons. (1 point)
olya-2409 [2.1K]

Answer:

Aromatic Hydrocarbons

Explanation:

Aromatic (Pleasant Odour) Hydrocarbons are those having pleasant odours.

8 0
3 years ago
Read 2 more answers
Rank the following atoms in order of increasing first ionization energies (i.e., lowest to highest): Rb, F, Mg, B, N.
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