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Marianna [84]
3 years ago
5

Write the complete balanced equation for the reaction that occurs when ch4 combusts in o2.

Chemistry
2 answers:
dusya [7]3 years ago
6 0
CH4 + 2O2 ---> CO2 + 2H2O
Darya [45]3 years ago
6 0

<u>Answer:</u> The balanced equation for the above reaction is given below.

<u>Explanation:</u>

Combustion reaction is defined as the reaction in which a hydrocarbon reacts with oxygen to produce carbon dioxide and water molecule.

The balanced chemical equation for the combustion of methane follows:

CH_4+2O_2\rightarrow CO_2+2H_2O

By stoichiometry of the reaction:

1 mole of methane gas reacts with 2 moles of oxygen gas to produce 1 mole of carbon dioxide and 2 moles of water molecule.

Hence, the balanced chemical equation is given above.

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A sample of marble has a volume of 6 cm3 and a density of 2.76 g/cm3. What is its mass?
zhuklara [117]

Answer:

16.56g

Explanation:

6*2.76=16.56...

6 0
3 years ago
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A certain gas is present in a 15.0 LL cylinder at 2.0 atmatm pressure. If the pressure is increased to 4.0 atmatm the volume of
Helga [31]

Explanation:

According to Boyle's law,  pressure of a gas is inversely proportional to its volume at constant temperature and moles.

Mathematically,       P = \frac{k}{V}

where,     k = proportionality constant

Also, formula for initial pressure and volume is as follows.

              P_{i} = \frac{k_{i}}{V_{i}}

or,           k_{i} = P_{i} \times V_{i}

                          = 2 atm \times 15 L

                          = 30 atm L

Now, we will calculate the value of k_{f} as follows.

             k_{f} = P_{f} \times V_{f}

                         = 4 atm \times 7.5 L

                         = 30 atm L

Hence, as k_{i} = k_{f} this means that it signifies that gas obeys boyle's law.

6 0
4 years ago
Which two properties are explained by the pool-of-shared-electrons model for metals?
Svetllana [295]
I believe it is C but if not that A
5 0
3 years ago
The solubility of carbon dioxide in water is 0.161 g CO2in 100 mL of water at 20ºC and 1.00 atmCO2. A soft drink is carbonated w
Sedbober [7]

<u>Answer:</u> The solubility of carbon dioxide at 5.50 atm is 0.886g/100mL

<u>Explanation:</u>

To calculate the molar solubility, we use the equation given by Henry's law, which is:

C_{A}=K_H\times p_{A}

Or,

\frac{C_{1}}{C_{2}}=\frac{p_{1}}{p_2}

where,

C_1\text{ and }p_1 are the initial concentration and partial pressure of carbon dioxide

C_2\text{ and }p_2 are the final concentration and partial pressure of carbon dioxide

We are given:

C_1=0.161g/100mL\\p_1=1.00atm\\C_2=?\\p_2=5.50atm

Putting values in above equation, we get:

\frac{0.161g/100mL}{C_2}=\frac{1.00atm}{5.50atm}\\\\C_2=\frac{0.161g/100mL\times 5.50atm}{1.00atm}=0.886g/100mL

Hence, the solubility of carbon dioxide at 5.50 atm is 0.886g/100mL

4 0
4 years ago
What does it mean to standardize the naoh solution why can the molarity of the naoh solution not be determined accurately?
ruslelena [56]
A standard solution is a solution (in this case sodium hydroxide) whose concentration (molarity) is known very precisely. <span>The molarity of the sodium hydroxide solution cannot be determined accurately because s</span>olid sodium hydroxide is highly hygroscopic (absorbs water from the air) and cannot be accurately weighed. Sodium hydroxide form sodium carbonate because it absorbs carbon dioxide from the air.
5 0
3 years ago
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