CHEMISTRY HIGH SCHOOL

Which are the reactants in this combustion reaction? _____ > CO2 2H2O Select one of the options below as your answer:a. CH4 2O2
b. 2H2CO3
c. CO2 2H2O

Answers

Answer 1
Answer: a.CH4 2O2, so we have one C, 4 H and 4 O in each side of the equation, that is the correct balancing. Also this is a complete combustion as CO2 is produced instead of CO. Hope i helped!
Answer 2
Answer: Chemical equation balanced:

CH₄ + 2 O₂ = CO₂ + 2 H₂O

type of reaction: Combustion 

Answer A

hope this helps!

Related Questions

The reaction of a Lewis acid with a Lewis base would most likely be accompanied by an increase in which item?covalent bonds hydronium ions electron pairs hydroxide ions
The change in heat energy for a reaction is best expressed as a change in a. Enthalpy (H) b. Absolute temperature (T) c. Specific heat (c) d. Entropy (S) e. Kinetic energy (KE)
Help please! :)Why are prefixes not needed in naming ionic compounds?A. lon charges are written as superscripts with the names of theatoms.B. Roman numerals are used instead of prefixes to indicate number.C. Subscripts are used in the name to indicate number of atoms.D. Ions combine in only one ratio.
Cold packs are used to treat minor injuries. Some cold packs contain NH4NO3(s) and a small packet of water at room temperature before activation. To activate this type of cold pack, the small packet must be broken to mix the water and NH4NO3(s). The temperature of this mixture decreases to approximately 2°C and remains at this temperature for 10 to 15 minutes.State the direction of heat flow that occurs when the activated cold pack is applied to the body. Identify both types of bonds in the NH4NO3(s).
In what respect does an atom of magnesium differ from a magnesium ion (Mg^{2+})? (A)The ion has a more stable electronic arrangement than the atom. (B)The positive charge on the nucleus of the ion is two units greater than the nuclear charge on the atom. (C)The ion has two more protons than the atom. (D)The ion will react more readily with free Cl₂. (E)The ion has two more planetary electrons than the atom. Can anyone explain this one?

How does oxygen get into the cell in order for cellular respiration to occur?A.Diffusion
B.Exocytosis
C.Osmosis
D.Endocytosis

Answers

Answer:

A. Diffusion

Explanation:

A.Diffusion  - this is correct. Diffusion is the process where small molecules enter the cell by moving from a high concentration to a low concentration through a semi-permeable membrane.

B.Exocytosis  - this is incorrect. Exocytosis is a cell transport mechanism where the cell uses a system of vesicles to transport cargo outside of the cell. The vesicles fuse to the cell membrane and deliver the cargo outside.

C.Osmosis  - this is incorrect, osmosis is a type of diffusion specific to water molecules

D.Endocytosis - this is incorrect. Endoocytosis is a cell transport mechanism where the cell uses a system of vesicles to transport cargo into the cell. The cell membrane engulfs the molecules and brings them into the cell via the vesicle

if an unknown mineral has a hardness between 5 and 9, what could you do to the mineral to find out more about its hardness?

Answers

you need to do a
scratch test

An aqueous solution of lithium hydroxide contains hydroxide ions as the only negative ion in the solution. Lithium hydroxide is classified as an

Answers

An Arrhenius acid refers to a component, which dissociates in water to produce hydrogen ions, or it can also be stated as that the acid enhances the concentration of hydrogen ions in an aqueous solution. On the other hand, an Arrhenius base refers to a component, which gets dissociate in water to produce hydroxide ions, or it can be said that a base enhances the concentration of hydroxide ions in an aqueous solution.  

Therefore, an aqueous solution of lithium hydroxide comprising hydroxide ions as the sole negative ion in the solution is classified as an Arrhenius base.

Answer is an Arrhenius Base.

Mercury(II) oxide (HgO) decomposes to form mercury (Hg) and oxygen (O2). The balanced chemical equation is shown below. 2HgO 2Hg + O2 The molar mass of HgO is 216.59 g/mol. The molar mass of O2 is 32.00 g/mol. How many moles of HgO are needed to produce 250.0 g of O2? 3.906 7.813 15.63 73.87

Answers

Answer:

15.63

Explanation:

250g O2 x 1 mol O2 x 2mol HgO / 32 g O2 x 1 mol O2

According to the law of conservation of energy, A) an object loses most of its energy as friction. B) the total amount of energy for a system stays the same. C) the potential energy of an object is always greater than its kinetic energy. D) the kinetic energy of an object is always greater than its potential energy.

Answers

I did research and got B

Answer:

B.

Explanation:

What is produced as a lead-acid battery is discharged?a. Acid
c. Electrolytes
b. Lead sulfate
d. Zinc oxide

Answers

      Lead sulfate is produced as a lead acid battery is discharged. Hope this helped!

Answer:

b

Explanation:
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