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Grace [21]
3 years ago
11

PLEASE HELP!! due soon

Chemistry
1 answer:
mina [271]3 years ago
4 0

Answer:

The pic won't load sorry try posting this question again and then i'll be able to answer!

Explanation:

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What is the energy change that will occur when 25.5 grams of oxygen gas (O2) react with excess methane (CH4) according to the re
AysviL [449]
Amount of CH4 is excess, so no need to worry about it 
<span>but the limiting factor is the Oxygen </span>

<span>according to stranded equation, </span>

<span>CH4 + 2 O2 --> CO2 + 2 H2O ΔH = -889 kJ/mol </span>


<span>just by taking proportions </span>

<span>(-889 kJ/mol) / 2 x 0.8 mol = - 355.6 kJ </span>

<span>so i think the answer is (a)</span>
7 0
3 years ago
Please answer! need it soon
mario62 [17]
Answer to what maybe I can help you
6 0
3 years ago
Which rigid cylinder contains the same number of gas molecules at STP as a 2.0-liter rigid cylinder containing H2(g) at STP?
Inga [223]
When we say STP that means the system is at its standard temperature and pressure. Both systems is having the same condition hence temperature and pressure is constant. We then set the amount of gas in both cases to be equal. Hence from the ideal gas law, 
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The answer is (2) 2 L of methane gas. 
4 0
3 years ago
Butane gas is compressed and used as a liquid fuel in disposable cigarette lighters and lightweight camping stoves. Suppose a li
exis [7]

4.60 g of  of H₂O form when all the butane burns.

<h3>What is butane ?</h3>

One of the smallest liquid streams frequently created in a refinery is butane. Ten hydrogen atoms and four carbon atoms make up the butane molecule. Typically, butane is either marketed as a finished product or is blended into LPG or gasoline in tiny quantities.

It is frequently employed as a fuel for portable stoves and cigarette lighters, as a propellant in aerosols, as a heating fuel, as a refrigerant, and in the production of a broad variety of goods. Liquefied petroleum gas and butane both exist (LPG).

Butane has a low level of toxicity. In butane misuse, high exposure concentrations can be anticipated. Central nervous system (CNS) and cardiac consequences are the most frequently seen effects in cases of misuse.

To learn more about butane from the given link:

brainly.com/question/14818671

#SPJ4

7 0
2 years ago
Is francium found in nature or lab?
ddd [48]

Answer:

It was the last element first discovered in nature, rather than by synthesis. Outside the laboratory, francium is extremely rare, with trace amounts found in uranium and thorium ores, where the isotope francium-223 continually forms and decays

8 0
3 years ago
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