1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Reika [66]
3 years ago
7

Type in the box below the balanced, chemical equation that describes the complete combustion reaction of starch (C18H30O15). To

receive full credit, you must include the phases of all the reactants and products as well. Hints: you should know the two products. Note that the compound being combusted contains oxygen.
Chemistry
2 answers:
nignag [31]3 years ago
7 0

Answer: C18H30O15 (solid)  + 9 O2 (Gas) --> 18 CO2 (Gas) + 15 H20 (Liquid)

Explanation:

So we know that the products of combustion are water vapor and carbon dioxide so we can put those there under the products. Also it needs to react with fire so the other reaction is gonna be oxygen gas. So if we balance out the equations by multiplying the Carbon Dioxide to reach the necessary amount of Carbon, and water so that we can reach the required amount of Hydrogen, all we would need to do is add oxygen to the left side which we already have a molecule for that.

Snowcat [4.5K]3 years ago
4 0

Answer:

C18H30O15(s) + 18O2(g) → 18CO2(g) + 15H2O(l)

Explanation:

Step 1: Data given

The reactants are C18H30O15 and O2

The products of a combustion reaction are CO2 and H2O

Step 2: The unbalanced equation

C18H30O15(s) + O2(g) → CO2(g) + H2O(l)

Step 3: Balancing the equation

C18H30O15(s) + O2(g) → CO2(g) + H2O(l)

On the left side we have 18x C, on the right side we have 1x C (in CO2). To balance the amount of C on both sides, we have to multiply CO2 on the right side by 18

C18H30O15(s) + O2(g) → 18CO2(g) + H2O(l)

On the left side we have 30X H, on the right side we have 2x H (in H2O). To  balance the amount of H on both sides, we have to multiply H2O on the right side by 15.

C18H30O15(s) + O2(g) → 18CO2(g) + 15H2O(l)

On the left side we have 17X O, on the right side we have 51x O (36x in CO2 and 15x in H2O). To  balance the amount of O on both sides, we have to multiply O2 on the left side by 18. Now the equation is balanced.

C18H30O15(s) + 18O2(g) → 18CO2(g) + 15H2O(l)

You might be interested in
Aqueous potassium sulfide and aqueous cobalt (II) chloride are mixed, and a double replacement reaction occurs. What is the corr
alekssr [168]
K2S (aq) + CoCl2( aq) ----->   2KCl (aq) + CoS (s)
potassium   +  cobalt                potassium chloride  + carbonyl  sulfide 
sulfide          chloride 

carbonyl sulfide :-  it is chemical compound with linear formula (OCS ) normally written as (CoS)  .it does not show its structure . its is colorless flammable gas with an unpleasant odour.
Potassium chloride :-  It is metal halide salt composed of potassium and chlorine. it is odorless and has white or colorless crystal appearance <span />
7 0
3 years ago
How are the geographical equator, meteorological equator, and ITCZ related? What happens at the ITCZ?
scoray [572]
The ITCZ<span> or </span>Intertropical Convergence Zone<span> is a region on Earth that experiences ... The </span>ITCZ<span> lies near the </span>equator<span>, bringing precipitation caused by convection. ... </span>Related<span>. The Poetry of Sailors: What Are Doldrums and Trade Winds</span>
4 0
3 years ago
Plz help me with this question plzzzzz​
LekaFEV [45]

Answer:

6

Explanation:

Formula: Al2O3

If we require 2Al2O3

                       We divide 2 by 3

Sorry for the shadow of phone and fingers.

 

8 0
2 years ago
What are the very small particles that make up all matter?
nadezda [96]
All matter is made up of particles called atoms and molecules (as opposed to being continuous or just including particles). On the following page, the idea is stated as one of four concepts in Dalton's theory: “All matter is composed of tiny, indivisible particles called atoms” (p. 158s).
3 0
2 years ago
What number is considered neutral? (On the pH scale)
VMariaS [17]
7 is neutral on the pH scale
4 0
3 years ago
Other questions:
  • What is the mass (in grams) of 9.42 × 1024 molecules of methanol (CH3OH)?
    15·2 answers
  • How many protons , neutrons and electrons are in an atom of magnesium-24?
    12·1 answer
  • In creating a covalent bond, it would be best to bind sulfur to:
    12·2 answers
  • Give the oxidation numbers of all atoms in NaMnO4
    15·1 answer
  • What mass (in grams) of Mg(NO3)2 is present in 151 mL of a 0.350 M solution of Mg(NO3)2?
    15·2 answers
  • If the length of a cube is 2.5 cm, the width is 2.5 cm, the height is 2.5 cm and the mass of the
    14·1 answer
  • the electron configuration of an element in its ground state is illustrated above. which, if any, of the three principles that d
    15·1 answer
  • At 3 atm of pressure, a cylinder with a movable piston contains 2000 ml of gas. If the pressure
    11·1 answer
  • How many valence electrons does B (boron) have?<br> A. 13<br> B. 5<br> C. 10<br> D. 3
    10·1 answer
  • A lead apron is a ________________ instrument classification of disease transmission. Fill in the blank
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!