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mr Goodwill [35]
3 years ago
12

Balance the following reaction. A coefficient of "1" is understood. Choose the option "blank" for the correct answer if the coef

ficient is "1."
C3H8 + O2 → CO2 + H2O
Chemistry
2 answers:
Charra [1.4K]3 years ago
8 0
C3H8 + 5O2 —-> 3CO2 + 4H2O
il63 [147K]3 years ago
8 0

Answer:

Hope this helps!

Explanation:

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How many grams of water can be produced when 65.5 grams of sodium hydroxide reacts with excess sulfuric acid? (4 points) You mus
stiks02 [169]
Balanced Equation: H2SO4 + 2NaOH --> 2H2O + Na2SO4

Moles= Mass/RMM
= 65.5/40
= 1.6375

Mole Ratio = 2:2
= 1.6375

Mass (H2O) = 1.64 x 18
= 29.5 g
5 0
4 years ago
For the reaction N2O4(g) ⇋ 2NO2(g), Kc = 0.25 at 98°C. At a point during the reaction, the concentration of N2O4 = 0.50 M and th
Scilla [17]

Answer:

Q = 0.50

No

Left

Explanation:

At a generic reversible equation

aA + bB ⇄ cC + dD

The reaction coefficient (Q) is the ratio of the substances concentrations:

Q = \frac{[C]^c*[D]^d}{[A]^a*[B]^b}

Solids and liquid water are not considered in this calculus.

When the reaction achieves equilibrium (concentrations are constant), the Q value is named as Kc, which is the equilibrium constant of the reaction. If Q > Kc, it indicates that the concentration of the products is higher, so, the reaction must progress to the left and form more reactants; if Q < Kc, than the concentrations of the reactants, are higher, so, the reaction progress to the right.

In this case:

Q = \frac{[NO_2]^2}{[N_2O_4]}

Q = \frac{0.50^2}{0.50}

Q = 0.50

So, Q > Kc, the reaction is not at equilibrium and it progresses to the left.

6 0
3 years ago
In a chemical change
Vsevolod [243]

Answer:

B. materials change their properties.

Explanation:

In a chemical change, materials often change their properties because a re-arrangement of atoms takes place.

A chemical change is one in which new kind of matter is formed.

It is always accompanied by energy changes.

  • Chemical changes are not reversible.
  • They lead to the production of new kinds of matter
  • It involves mass changes
  • Requires considerable amount of energy
8 0
3 years ago
Are they all correct?
Degger [83]

Answer:yes

Explanation:

7 0
3 years ago
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What are the best note taking styles for high school?
photoshop1234 [79]

Answer:

cornell noted

Explanation:

used in middle school and can be helpful for subjects like ela history and science

5 0
3 years ago
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