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Alexus [3.1K]
3 years ago
13

The substances in a chemical reaction that are combined or separated to form new substances are the _______.

Chemistry
2 answers:
mihalych1998 [28]3 years ago
7 0
Precipitate reaction
katen-ka-za [31]3 years ago
6 0
Reactant/ Reagents and Products
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During the combustion of 5.000 g of octane, C8H18, 239.5 kcal is released. Write a balanced equation for the combustion reaction
lidiya [134]

The chemical equation for this combustion reaction is:

<span>C8H18  +  O2  -->  CO2  +  H2O</span>

 

Balancing by adding whole number coefficients:

<span>2 C8H18  + 25 O2  -->  16 CO2  + 18 H2O</span>

 

Including the phases:

<span>2 C8H18 (l)  + 25 O2 (g)  -->  16 CO2 (g) + 18 H2O (l)</span>

<span>where g is gas and l is liquid</span>

3 0
3 years ago
PLZ HELP! I will give brainliest for best answer!!!!
AnnZ [28]

Nitrogen is 1.25 g/L

Sulfur Dioxide is 2.86 g/L

Methane is 0.174 g/L

Hope I helped :)

4 0
3 years ago
How many moles of oxygen are in 1 mole of iron (II) nitrate?
Alekssandra [29.7K]

Answer:

Explanation:

One mole of Fe(NO3)3, or iron(III) nitrate, has three moles of nitrate molecules, which have three moles of oxygen atoms each. We can show this mathematically:

1 mole Fe(NO3)3 * (3 moles NO3)/(1 mole Fe(NO3)3) = 3 moles NO3

3 moles NO3 * (3 moles Oxygen)/(1 mole NO3) = 9 moles Oxygen

9 moles of Oxygen in one mole Fe(NO3)3

3 0
3 years ago
Read 2 more answers
What is the representative particle for an element?
xz_007 [3.2K]

Answer:

The representative particle for an element is AN ATOM.

Explanation:

Representative particle of a substance refers to the smallest unit of that substance, which can not be broken down into smaller particles. The representative particles of an element is an atom, because each element is made up of atoms, which are the smallest unit of that element; they can not be broken down further.

A representative particle is chemically identical with the parent element and will have all the properties of the parent element.  

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Consider the following reaction where Kp = 1.80X10-2 at 698 K.
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