You may recall that the products of the complete combustion of ahydrocarbon are water vapor and carbon dioxide gas. Write the balanced
equation showing the combustion of methane. Do not forget to include the
states of matter of the reactants and the products. Hint: Methane is a gas at
standard temperature and pressure.

Answers

Answer 1

Answer:

Answer: $CH_4(g)+2O_2(g)\rightarrow CO_2(g)+2H_2O(g)$

Explanation: According to law of conservation of mass, mass can neither be created nor be destroyed.

Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

This is an example of combustion reaction in which hydrocarbon reacts with oxygen to form carbon dioxide and water. This is an exothermic reaction in which a large amount of heat is liberated, thus water also exists as vapors.

$CH_4(g)+2O_2(g)\rightarrow CO_2(g)+2H_2O(g)$

Answer 2

Answer: CH4 + 2O2 --> CO2 + 2H2O

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Select all that apply. Consider this system: CH3COOH(aq) H+(aq) + CH3COO- Ka = 1.8 x 10-5
What will happen to the equilibrium as OH- ions are added?

A) H+ will combine with OH- to form water.
B) [CH3COOH] will increase.
C) The acid will dissociate to supply more H+.
D) The reaction will move to the right.
E) The reaction will move to the left.

Answers

Consider this system: CH3COOH(aq) H+(aq) + CH3COO- Ka = 1.8 x 10-5
The equilibrium as OH- ions are added;

A) H+ will combine with OH- to form water.

C) The acid will dissociate to supply more H+.
D) The reaction will move to the right.

Answer : The correct options are, (A), (C) and (D)

Explanation :

Le-Chatelier's principle : It states that if any change in the variables of the reaction, then the equilibrium will shift in that direction where the effect will be minimum.

The balanced equilibrium reaction will be,

$CH_3COOH(aq)\rightleftharpoons H^+(aq)+CH_3COO^-$

As the concentration of $H^+$ are decreased, the equilibrium will shift in a direction where concentration of $H^+$ is increasing and thus the dissociation of acid will increase to supply more of $H^$ ions. During this process the reaction will move to the right direction.

In the given equilibrium reaction when the $OH^-$ are added then the $H^+$ ion will combine with $OH^-$ ion to form water.

Hence, the correct options are, (A), (C) and (D)

Not all of the water falls as rain, snow,or sleet evaporates. What happens to the rest of the water?

Answers

Hi there! All of the water returns to the atmosphere, it's called evapotranspiration and condenses. And then the water falls back to the Earth's surface and starts the cycle all over again. If you don't know what I mean, it's the Water Cycle.

What information does a chemical formula of a compound provide?a. The type and amount of elements
b. The different kinds of compounds included within the chemical formula
c. The types of molecules present in a formula
d. The correct amounts of substances to mix together to make a formula

Answers

I think the best option is A. A chemical formula of a compound provides information on the type and amounts of elements in that compound. For instance, we have NaOH. From the given formula, we see that it contains the elements sodium, oxygen and hydrogen. Also, their corresponding number of molecules.

What would happen if a decomposers were absent from the forest ecosystem?

Answers

there would be no way that the nutrients could go back into the ecosystem and there would be tons of dead animals lying around.

Consider four elements from Group 7A: fluorine in the second period, chlorine in the third period, bromine in the fourth period, and iodine in the fifth period. Which element has the largest first ionization energy?

Answers

Out of the possible answers for this question, fluorine in the second period is correct. Of the four elements fluorine, chlorine, bromine and iodine, fluorine has the largest first ionization energy, with a Enthalpy number of 1681.0. Of all the elements, helium has the highest first ionization energy figure.

How many degrees Celsius is 871.09 Kelvin? Round your answer to two decimal places.

Answers

To convert Kelvin to Celsius, you need to subtract 273.15 from the given value. Let's perform the conversion:

871.09 Kelvin - 273.15 = 597.94 degrees Celsius

Therefore, 871.09 Kelvin is approximately equal to 597.94 degrees Celsius when rounded to two decimal places.

The temperature of 871.09 Kelvin as stated in the question is approximately -101.06 degrees Celsius.This is obtained by the standard result.

Temperature is often measured in two main scales, Kelvin (K) and Celsius (°C). To convert from Kelvin to Celsius, you need to subtract 273.15 from the given temperature in Kelvin.

This adjustment accounts for the fact that 0 Kelvin (absolute zero) is the point at which all molecular motion theoretically stops, while 0 degrees Celsius is the freezing point of water.

In this case, for the temperature of 871.09 Kelvin, the conversion is as follows:

The temperature in Celsius = 871.09 K - 273.15 ≈ -101.06°C.

This means that a temperature of 871.09 Kelvin is approximately equivalent to -101.06 degrees Celsius. It's important to note that Kelvin is an absolute temperature scale, where 0 K represents absolute zero, while Celsius is a relative scale with 0°C corresponding to the freezing point of water at standard atmospheric pressure.

To know more about Temperature conversion,

brainly.com/question/32376219

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