CHEMISTRY HIGH SCHOOL

The combustion of a sample of butune, C4H10 (lighter fluid), produced 2.46 grams of water. 2 C4H10 + 13O2------> 8CO2 + 10H2O

How much oxygen is used up in grams?

Answers

Answer 1
Answer: Molar mass :

H₂O = 18.0 g/mol
O₂ = 32.0 g/mol

2 C₄H₁₀ + 13 O₂ = 8 CO + 10 H₂O

13 x 32.0 g O₂ ------------- 10 x 18.0 g H₂O
            ? g O₂ ------------- 2.46 g H₂O


Mass O₂ = 2.46 x 13 x 32.0 / 10 x 18.0

Mass  O₂ =1023.36 / 180

=> 5.68 g of O₂

hope this helps!

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PLS PLS SOMEONE HELP ME ANSWER THESE QUESTIONS PLEEEAAASSSE!!(press on the picture so you can see the questions better!)​

Answers

Answer:

1)conduction

2) convection

3) conduction

4) radiation

5) radiation

6) radiation

7) conduction

8) conduction

9) radiation

10) convection

Explanation:

not 100% sure

What hypothesis did Miller-Urey test in their experiment?A. Organic molecules can form in a reducing atmosphere.
B. Earth is a primordial soup.
C. Organic molecules cannot survive in a reducing atmosphere.

Answers

The answer s the option B. Earth is a primordial soup. They tested Oparin's theory which states that the life (organic matter) can be formed from inorganic compounds. They placed a mixture of compounds that are supposed to be present in Earth before life started, which are CO2, methane (CH4) and water (H2O), hydrogen (H2) and nitrogen (N2) in a closed vessel and used electric discharges (to simulate the effects of the storms that happened in Earth without atmosphere). Then they analyzed the products obtained and indeed found organic matter. Yet, this does not mean that life is definetly originated in this form.

Driving cars lowers the pH of the oceans by _______.a.
releasing CO2 that dissolves and forms acid in the oceans
b.
releasing pollutants that lead to smog
c.
releasing CO that dissolves and forms acid in the oceans
d.
releasing pollutants that lead to acid rain

Answers

Answer: Option (a) is the correct answer.

Explanation:

When CO_(2) is released from driving cars, some of which is absorbed by the plants but the rest of CO_(2) reacts with the sea or ocean water.

It reacts with water molecules and changes the chemistry of ocean water by lowering its pH. As it is known that when pH becomes lower then the substance becomes acidic in nature.

Thus, we can conclude that driving cars lowers the pH of the oceans by releasing CO_(2) that dissolves and forms acid in the oceans.
A) releasing CO2 that dissolves and forms acid in the oceans (i think i'm sorry if its wrong)

An article about half-lives describes a parent isotope. What is a parent isotope?

Answers

A parent isotope plays an important role in the decay chain process. The parent isotope is the one who undergoes the decay process in the nuclear reaction in order to form its daughter isotope. The daughter isotope may decay on its own and may have its own daughter isotope as well.

Answer:

A. The isotope that forms from the radioactive decay of a less stable isotope

Explanation:

Edge 2021

Which hand is negatively charged? Ο Α. OB. Oc. OD. ​

Answers

Answer:

it would be OA that is negatively charged

Which fuel is used for nuclear power?a. coal
b. oil
c. natural gas
d. uranium

Answers

Hello,

The fuel used for nuclear power is Uranium.

So uranium is used for nuclear power.

Thanks for using brainly.
Correct option is D. Uranium because atoms of uranium helps to replaces the burning of coal or gas.

Hope this helps you..  :)
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