Complete balanced equation for the reaction between aluminum metal (Al) and oxygen gas (O2)

Answers

Answer 1

Answer: the answer to this is 4 Al + 3 O2 = 2 Al2O3 i hope that this helps

Related Questions

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A certain element has a melting point over 700 ∘C and a density less than 2.00 g/cm3. What is one possible identity for this element?
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In a redox reaction, which particles are lost and gained in equal numbers?(1) electrons (3) hydroxide ions(2) neutrons (4) hydronium ions

what is the significance of the number that is written above each of the atomic symbol in the periodic table?

Answers

It is the atomic number of the element, which is the number of protons in the nucleus of an atom that determines the chemical properties of an element.

a gas in a balloon at constant pressure has a volume of 120.0 mL at -123°C. What is the volume at 27.0°C?

Answers

The law that can be applied here is Charle’s Law which states that for a fixed mass of gas and at constant pressure, the volume is directly proportional with the absolute temperature. It is represented by the equation of V1/T1=V2/T2. Since there is no negative volume, we will change the temperature into Kelvin, (-123+273=150K) and (70+273=300K). plugging in the values, V2 = (300K)(120mL/150K) we get a volume of 240mL.

1. Calculate the amount of heat required for 25.0 grams of water tochange from 10 degrees Celsius to 30 degrees Celsius. 2. 50.0 grams of water at 100 degrees Celsius evaporated to water vapor 2 points
at 100 degrees Celsius. Calculate the amount of heat required for this
conversion.

3. A student measured 15.0 grams of ice in a beaker. The beaker was then
placed on a hot plate where it was heated uniformly for a certain amount
of time. During the melting process of the ice, the student noted that the
temperature was at 0 degree Celsius. When all the ice converted to water,
the final temperature was also at 0 degree Celsius. How much heat was
used to melt the ice?

4. If 5.0 grams of water was cooled from 50 degrees Celsius to 40
degrees Celsius, then calculate the amount of heat released by the water.

5. A certain amount of water used exactly 84.0 Joules of heat energy to
change from 25.0 degrees Celsius to 35 degrees Celsius. How many
grams of water was used?

Please help me

Answers

Answer:

Explanation:

1 )

amount of heat required = mass x specific heat x rise in temperature

= 25 x 4.2 x 20 = 2100 J .

2 )

Amount of heat required

= mass x latent heat of vaporisation

= 50 x 2260 = 113000 J .

3 )

Amount of heat required in melting the ice

= mass x latent heat of fusion

= 15 x 336 = 5040 J

heat released in cooling water

= mass x specific heat x fall in temperature

= 5 x 4.2 x 10

= 210 J

5 )

amount of heat required = mass x specific heat x rise in temperature

84 = mass x 4.2 x 10

mass = 2 grams .

Decreasing the temperature can change water vapor into liquid water. What other change might also accomplish this task?A. Increasing the temperature
B. Decreasing the pressure
C. Increasing the pressure

Answers

Answer;

Increasing the pressure

Explanation;

An increase in pressure on a gas can bring the molecules close enough to each other to develop some inter-molecular attractions and form a liquid.
The increase in pressure changes the state of matter from gas to liquid and also from liquid to solid. But increase in pressure alone cannot change the state of matter. Every gases and liquid have certain temperature above which the application of pressure would not change the state of matter.

Decreasing the temperature can decrease the pressire. Temperature is directly proportional to pressure as what the law that Gay-Lussac stated. As the pressure goes increases,the temperature also increases. The higher the energy of a molecule, there is a high temperature and pressure also.

In terms of the sequence of the scientific method what is the immediate purpose of doing an experiment?

Answers

The correct answer should be something like gathering data or similar.

You conduct experiments to test a hypothesis and then gather the data and analyze it to see whether the hypothesis is correct.

Answer:

gathering data

Explanation:

When you do an experiment you want to gather information to make a conclusion on your hypothesis.......-

Which statement is true about an empirical formula?1. It is the true ratio of atoms in a formula unit.
2. It is the simplest ratio of atoms in a formula unit.
3. It represents the true molecular mass of a chemical formula.
4. It represents the highest ratio of coefficients in a chemical formula.

Answers

The statement that is true about an empirical formula is it is the simplest ratio of atoms in a formula unit. The answer is number 2. The rest of the statements do not answer the question above.

Answer:

2. It is the simplest ratio of atoms in a formula unit.

Explanation:

The empirical formula refers to how to provide the minimum proportion in which chemical elements combine into one substance. Sometimes it may happen that the minimum formula is equal to the molecular formula of the compound; However, this is not always true. In short, the empirical formula refers to the simplest ratio of atoms in a unit of formula.

For example, the empirical or minimal formula of water is H2O, indicating that there is a 2: 1 ratio between the elements that make up water molecules. And, coincidentally, this is also the molecular formula of water.

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H2(g) + CO2(g) + 10 kcal H2O(g) + CO(g)In another experiment involving the above reaction at 1,000°C, the equilibrium concentrations were found to be: H2(g) = 2.0 moles per liter H2O(g) = 4.0 moles per liter CO2(g) = 5.0 moles per liter CO(g) = 4.0 moles per liter What is the equilibrium constant, Keq, for this reaction?

Absolute zero is A. the temperature at which the motion of particles theoretically ceases. B. defined as 0°C. C. the triple point for water. D. all of the above

David says, "Pure honey has nothing else added." Susan says ,"The honey is not really pure. It is mixture of many subsatnces . Who is right? Explain your answer.