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nata0808 [166]
2 years ago
9

Energy that is lost as heat

Chemistry
1 answer:
Tema [17]2 years ago
3 0
Can still be used to do work
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If 20.0 g acetylene is allowed to completely react with oxygen, how many grams of o2 are reacted? 2c2h2(g 5o2(g → 4co2(g 2h2o(g
KATRIN_1 [288]
The balanced chemical reaction is written as:

<span>2C2H2(g) + 5O2(g) → 4CO2(g) + 2H2O(g)

We are given the amount of acetylene to be used in the reaction. This will be the starting point for the calculations.

20.0g C2H2 ( 1 mol / 26.04 g) ( 5 mol O2 / 2 mol C2H2 ) ( 32 g / 1 mol ) = 61.44 g O2 is needed</span>
7 0
3 years ago
Who is Gilbert Newton lewis ​
skelet666 [1.2K]

Gilbert N. Lewis (1875-1946) was an American physical chemist.  

His work with heavy water and resources were adapted by Ernest Lawrence in the development of the cyclotron.

 

SCIENTIFIC CONTRIBUTIONS

Lewis made many contributions to science. He was nominated for the Nobel Prize 41 times, though he was never awarded the prize.

He discovered covalent bonds and electron pairs. He worked with isotope separation, and became the first person to purify a sample of heavy water. The heavy water was later used as projectiles in Lawrence’s 27-inch cyclotron.  

He also made contributions in ideas on relativity and acid-base reactions and coined the term “photon” as the smallest unit of light.

8 0
2 years ago
PLEASE HELP ME <br> In the following reaction, what element is made?
jarptica [38.1K]
<span>organic compounds is ur awnser  </span>
4 0
3 years ago
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How was the work of Newlands similar to that of Mendeleev on the periodic table?
kiruha [24]
It was similar because  they both arranged the elements in order of increasing atomic mass.
8 0
3 years ago
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If the following elements were to form ions, what is the expectant charge?<br> Ca<br> Na<br> P
Ksju [112]
You can use the periodic table to help you determine the charge of an element when it becomes an ion. You base this on the group 8 elements called the noble gases. You can determine the charge by finding the difference of the atomic numbers of the given element to their nearest noble gas. It is made easier for elements on the left side. You can take their charge to be their group number. Since calcium is in group 2A, it will have a charge of 2+. Since Na is in group 1A, it will have a charge of 1+. Since Phosphorus is a nonmetal, it will have a negative charge because it needs to gain electrons to achieve their nearest noble gas. Since the nearest noble gas is Argon having an atomic number of 18, while Phosphorus has an atomic number of 15:

Charge = 15 - 18 = -3

The charge of Phosphorus is -3.
3 0
3 years ago
Read 2 more answers
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