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Aleksandr-060686 [28]
4 years ago
8

Balance the following equation for the combustion of methane (3 pts):

Chemistry
2 answers:
lara31 [8.8K]4 years ago
8 0

Answer:

The balanced equation is.

CH₄  + 2O₂ → CO₂  +  2H₂O

Explanation:

CH₄ + O₂ --> CO₂ + H₂O

You have 4 H in reactant side. In order to balance the H, you add 2 in water, in product side.

Now, you unbalanced the O, because you have 2 O from CO₂ and 2 O from water. As you have 4 O in total, you add a 2 in the O₂ in the reactant side. C is balanced because you have 1 C on each side

Colt1911 [192]4 years ago
3 0

Answer:

\huge \boxed{\mathrm{CH_4+ 2O_2 \Rightarrow CO_2 +2 H_2O}}

\rule[225]{225}{2}

Explanation:

\sf CH_4+ O_2 \Rightarrow CO_2 + H_2O

Balancing the Hydrogen atoms on the right side,

\sf CH_4+ O_2 \Rightarrow CO_2 +2 H_2O

Balancing the Oxygen atoms on the left side,

\sf CH_4+ 2O_2 \Rightarrow CO_2 +2 H_2O

\rule[225]{225}{2}

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Which of the following is NOT an example of how watersheds can change over time?
kow [346]

Answer:

D. Flooding occurs when too much rain falls upstream.

Explanation:

Flooding is not a change in a watershed.

A, B, and C are wrong. They all represent changes in a watershed.

8 0
3 years ago
When you standardized the Na2S2O3, what molarity of Na2S2O3 did you obtain?
nikdorinn [45]

Answer:

0.46M NaS₂O₃ (Assuming KIO₃ solution with a concentration of 1.0M)

Explanation:

Based on the reaction:

6 Na₂S₂O₃ + KIO₃ + 5 KI + 3 H₂SO₄ → 3 Na₂S₄O₆ + 3 H₂O + 3 K₂SO₄ + 6 NaI

<em>6 moles of  Na₂S₂O₃ react per mole of KIO₃</em>

Assuming the molarity of the KIO₃ solution is 0,1M:

Moles of KIO₃: = 5.0x10⁻³L ₓ (0.1 mol / L) = <em>5.0x10⁻⁴ moles</em>

As 6 moles of thiosulfate reacted per mole of iodate:

5.0x10⁻⁴ moles KIO₃ ₓ (6 moles Na₂S₂O₃ /  1 mole KIO₃) =

<em>3.0x10⁻³ moles of Na₂S₂O₃. </em>In 6.5mL (6.5x10⁻³L):

3.0x10⁻³moles Na₂S₂O₃ / 6.5x10⁻³ L = 0.46M NaS₂O₃

6 0
3 years ago
write a checklist with at least three entries for how you can evaluate whether scientific information is reliable
Lilit [14]

Answer:

Was the information obtained from government or academic websites? Was the information published in scientific journals, articles, books, and researches? Was the information published by advertisers?

Explanation:

If the first two questions are a yes and the third question is a no, your good to go.

8 0
3 years ago
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number of moles solute:

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Therefore :

M = moles of solute / volume ( L )

M = 0.00075 / 0.5

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