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Vlad1618 [11]
3 years ago
15

When the following equation is balanced, what is the coefficient for O2?

Chemistry
1 answer:
harkovskaia [24]3 years ago
4 0

Answer:

3 is the coefficient of oxygen.

Explanation:

Chemical equation:

CH₃OH + O₂      →     CO₂ + H₂O

Balanced chemical equation:

2CH₃OH + 3O₂      →     2CO₂ + 4H₂O

The given reaction is combustion reaction. In this reaction methanol is burn in the presence of oxygen and produces carbon dioxide and water.

The balance equation show reaction also follow the law of conservation of mass.

This law was given by French chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

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3 years ago
Suppose we have 100 g of each of the following substances. Which sample contain the greatest number of moles (F.W. = Formula Wei
Sindrei [870]

Answer:

100 g of water has the highest number of moles

Explanation:

Recall that the number of moles is obtained as given mass/formula weight

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number of moles = 100g/36.5g/mol = 2.7 moles

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number of moles = 100g/18g/mol = 5.5 moles

For MgCO3

number of moles = 100g/84.3 g/mol = 1.2 moles

For AlCl3

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For NaCl

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3 0
3 years ago
How many grams of mgcl2 are contained in 500 grams of a 1.0% solution
GarryVolchara [31]

1. Julie had saved 105 coins from her daily allowance. If the coins consist of 5-peso coins and 10-peso coins amounting to ₱950, how many of each kind of coin did she have?

1. Julie had saved 105 coins from her daily allowance. If the coins consist of 5-peso coins and 10-peso coins amounting to ₱950, how many of each kind of coin did she have?

5 0
3 years ago
Which of the following water solutions would likely have the highest boiling point?
Vedmedyk [2.9K]

Answer:

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Explanation:

4 0
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2. A gas occupies 320. ml at a pressure of 420.5 mmHg. Determine the volume if the pressure is decreased to 300. mmHg.
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Explanation:

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5 0
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