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
iVinArrow [24]
2 years ago
12

18 gram of sucrose is dissolved in 180 gram of water. Calculate the number of oxygen atoms in the solution.​

Chemistry
1 answer:
EastWind [94]2 years ago
8 0

We know, molecular mass of sucrose is 342 g/mol.

So, number of moles in 18 g is :

n_1 = \dfrac{342\ g/mol}{18\ g}\\\\n_1 = 0.053 \ moles

Also, number of moles of water is :

n_2 = \dfrac{180}{18} \\\\n_2 =  10 \ moles

We know, 1 mole of sucrose contain 11 moles of oxygen.

So,

n' = 0.053\times 11\\\\n'= 0.583\ moles

1 mole of water contain 1 mole of oxygen .

So, moles of oxygen in water are :

n'' = 10\ moles

Total number of moles, n' + n'' = 10.583 \ moles .

Number of oxygen atoms are :

N = 6.022 \times 10^{23}\times 10.583\\\\N = 6.37 \times 10^{24}

Hence, this is the required solution.

You might be interested in
How do particles in matter change when a substance becomes hotter, cool down, or changes state?
Nana76 [90]

Answer:

When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. The end result of increased molecular motion is that the object expands and takes up more space.

hope this helps!!!!!!

3 0
3 years ago
Las fórmulas actuales de los compuestos propuestos por Dalton
KonstantinChe [14]

Answer:

La teoría atómica de Dalton fue el primer intento completo para describir toda la materia en términos de los átomos y sus propiedades.

Dalton basó su teoría en la ley de la conservación de la masa y la ley de la composición constante.

La primera parte de su teoría establece que toda la materia está hecha de átomos, que son indivisibles.

La segunda parte de su teoría establece que todos los átomos de un elemento dado son idénticos en masa y en propiedades.

La tercera parte de su teoría establece que los compuestos son combinaciones de dos o más tipos diferentes de átomos.

La cuarta parte de su teoría establece que una reacción química es un reordenamiento de átomos.

Partes de su teoría tuvieron que ser modificadas con base en el descubrimiento de las partículas subatómicas y los isótopos.

6 0
3 years ago
What stress will shift the following equilibrium system to the left?
Alona [7]

<u>Answer:</u> Increasing temperature

<u>Explanation:</u>

The Principle of Le Chatelier states that <u>if a system in equilibrium is subjected to a change of conditions, it will move to a new position in order to counteract the effect that disturbed it and recover the state of equilibrium. </u>

The variation of one or several of the following factors can alter the equilibrium condition in a chemical reaction:

  • Temperature
  • The pressure
  • The volume
  • The concentration of reactants or products

In the case of the reaction in the question, <u>the change that moves the balance to the left will be the one that moves it towards the reagents</u>, that is, that favors the production of reagents instead of products.

  • Decreasing the concentration of SO3 and increasing the concentration of SO2 <u>will favor the production of SO3</u>, which is the product of the reaction.
  • Decreasing the volume increases the pressure of the system and the balance will move to where there is less number of moles. In the case of the reaction in question, we have 3 moles of molecules in the reactants (1 mole of O2 + 2 moles of SO2) while in the products there are 2 moles of SO3 only, therefore, <u>decreasing the volume will displace the balance to the right</u>, which corresponds to the sense in which there is less number of moles.

The reaction of the question is an exothermic since ΔH <0, therefore in the reaction heat is produced and it can be written in the following way,

2SO2(g) + O2(g) ⇌ 2SO3(g) + heat

  • So, if we increase the temperature we will be adding heat to the system, so the balance would move to the left to compensate for the excess heat in the system.

5 0
3 years ago
What is the reduction half-reaction for the following unbalanced redox equation?
bazaltina [42]
First find the oxidation states of the various atoms: 
<span>in Cr2O2 2- Cr @ +1; In NH3 N @ +3; in CrO3 Cr @ +3, N2 N @ 0 </span>
<span>Note that N gained electrons, ie, was reduced; Cr was oxidized </span>
<span>Now there is a problem, because B has NH4+ which the problem did not, and is not balanced, showing e- in/out </span>
<span>B.NH4+ → N2 </span>

<span>Which of the following is an oxidation half-reaction? </span>
<span>A.Sn 2+ →Sn 4+ + 2e- </span>
<span>Sn lost electrons so it got oxidized</span>
5 0
3 years ago
Read 2 more answers
Cheryl kept a potted plant near a window. After two days, she observed that the plant had drooped as shown.
Alex_Xolod [135]
A watering the plant. Plants wilt or droop when there’s not enough water because it helps reduce the amount of a surface area
3 0
3 years ago
Other questions:
  • ¿Qué similitud existe entre un jugo natural de fruta y la neblina?
    10·1 answer
  • Corey Bayer is a 15-year-old patient at Inner City Health Care. He sustained an injury to his right wrist today during soccer pr
    8·1 answer
  • Many enzymes are inhibited irreversibly by heavy metal ions such as Hg2+ , Cu2+ , or Ag+ , which can react with essential sulfhy
    11·1 answer
  • A chef fills a 50 mL container with 43.5 g of cooking oil. What is the density of the oil?
    6·2 answers
  • Only oppositely charged objects can attract each other. true false
    11·1 answer
  • Describe the protons, electrons, and neutrons of an atom of hydrogen-2.
    9·2 answers
  • Rico mixed up 500 cc of salt solution. He weighed it and found its mass to be 585 g. Will his shake-up toy work the way he wants
    11·1 answer
  • Which is the largest number? O A. 2.2 x 108 O B. 2.9 O C. 2.5 x 10-5 D. 2.8 x 106​
    12·1 answer
  • 2HCl → H2 + Cl2<br> Is synthesis?
    7·1 answer
  • How is the rock cycle related to chemistry??
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!