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
Tanzania [10]
3 years ago
9

Glucose has formula C6 H12 O6.Calculate the number of Oxygen atoms present in 18 g of glucose​

Chemistry
2 answers:
Vadim26 [7]3 years ago
7 0
Approx.
1
10
⋅
m
o
l
×
24
⋅
atoms
⋅
m
o
l
−
1
×
N
A
,
where
N
A
=
6.022
×
10
23
⋅
m
o
l
−
1
.
Explanation:
We take the quotient.....
Number of moles
=
Mass of substance
⋅
g
Molar mass
⋅
g
⋅
m
o
l
−
1
=
Mass of substance
⋅
g
Molar mass
⋅
g
⋅
m
o
l
−
1
=
1
1
m
o
l
=
m
o
l
And thus we get an answer with dimensions of
m
o
l
as we require...
And so we retake the quotient.......
Number of moles of glucose
=
18
⋅
g
180.16
⋅
g
⋅
m
o
l
−
1
=
?
?
⋅
m
o
l
.
We know that glucose,
C
6
H
12
O
6
, has a formula of
180.16
⋅
g
⋅
m
o
l
−
1
, i.e.
(
6
×
12.011
+
12
×
1.00794
+
6
×
16.00
)
⋅
g
⋅
m
o
l
−
1
=
?
?
⋅
g
⋅
m
o
l
−
1
......
We are not finished there, because we were asked to find the number of atoms in such a molar quantity, and there are 24 atoms in one molecule of glucose.
And so we multiply the molar quantity by number of atoms per mole, and then by Avogadro's number to get the number of atoms,
18
⋅
g
180.16
⋅
g
⋅
m
o
l
−
1
×
24
⋅
atoms
⋅
m
o
l
−
1
×
N
A
18
⋅
g
180.16
⋅
g
⋅
m
o
l
−
1
×
24
⋅
atoms
⋅
m
o
l
−
1
×
6.022
×
10
23
⋅
m
o
l
−
1
=
?
?
Sveta_85 [38]3 years ago
3 0

Explanation:

this may help u follow me and mark as brainlist PlZzzzz

You might be interested in
From a 2.875 g sample containing only iron, sand, and salt, 0.660 g of iron and 1.161 g of sand were separated and recovered. Wh
Serjik [45]

Answer:

36.66%

Explanation:

Step 1: Given data

  • Mass of iron: 0.660 g
  • Mass of sand: 1.161 g
  • Mass of the sample: 2.875 g
  • Mass of salt: ?

Step 2: Calculate the mass of salt

The mass of the sample is equal to the sum of the masses of the components.

m(sample) = m(iron) + m(sand) + m(salt)

m(salt) = m(sample) - m(iron) - m(sand)

m(salt) = 2.875 g - 0.660 g - 1.161 g

m(salt) = 1.054 g

Step 3: Calculate the percent of salt in the sample

We will use the following expression.

%(salt) = m(salt) / m(sample) × 100%

%(salt) = 1.054 g / 2.875 g × 100% = 36.66%

7 0
3 years ago
Chalcopyrite is an ore with the composition cufes2. what is the percentage of iron in a 39.6 g sample of this ore? answer in uni
iren2701 [21]
<span>Well it depends on percentage by what, but I'll just assume that it's percentage by mass. For this, we look at the atomic masses of the elements present in the compound. Cu has an atomic mass of 63.546 amu Fe has 55.845 amu and S has 36.065 amu Since there are 2 molecules of Sulfur for each one of Cu and Fe, we'll multiply the Sulfur atomic weight by 2 to obtain 72.13 amu So we have not established the mass of the compound in amus 63.546 + 55.845 + 72.13 = 191.521 That is the atomic mass of Chalcopyrite. and Iron's atomic mass is 55.845 So to get the percentage, or fraction of iron, we take 55.845 / 191.521 Which comes out to 29.15% by mass Mass of the sample is not needed for this calculation, but since the question mentions it I would go ahead and check if the question isn't also asking for the mass of Iron in the sample as well, in which case you just find the 29.15% of 67.7g</span>
5 0
3 years ago
Reaction coordinates represent: A. The balanced equation for a chemical reaction. B. The change in pH for a chemical reaction. C
Hunter-Best [27]

Answer:

C. The potential energy change for a chemical reaction.

Explanation:

The reaction coordinate q illustrates, graphically, the energy changes during exothermic and endothermic reactions. This graphical representation of the energy changes in the course of a chemical reaction is known as reaction coordinates. A reaction coordinate is a graphical sequence of steps by which the reaction progresses from reactants through activated complexes to products. Reaction coordinates explain how far a reaction has proceeded towards the products or from the reactants.

From the images attached below, we can see the reaction coordinates in the reaction profiles.

5 0
2 years ago
What kingdom is Spirogyra in?
jasenka [17]
Protista .................................
8 0
3 years ago
Help?
ss7ja [257]

Newton's F=ma, which means the force (F) acting on an object is equal to the mass (m) of an object times its acceleration (a)

Explanation:

F = ma, or force is equal to mass times acceleration.

4 0
2 years ago
Other questions:
  • A student collected a 40.0 mL sample of H_{2} 2 ​ gas at a temperature of 20.0°C and pressure of 720.0 mmHg. The next day the te
    12·1 answer
  • Chemistry: An oxygen gas container has a volume of 20.0 L. How many grams of oxygen are in the container, if the gas has a press
    9·1 answer
  • How many moles of copper must react to form 0.845
    6·1 answer
  • What happens when a solid is dissolved into a liquid
    12·2 answers
  • Write iupac name of :
    7·1 answer
  • I need help with Number 63
    14·1 answer
  • Use the chart to determine which pair of atoms has the greatest difference in electronegativity.
    5·2 answers
  • Describe your understanding of atoms and their subatomatic particles
    14·1 answer
  • How much heat is needed to raise the temperature of 20.0g of H2O by 10.6oC?
    8·1 answer
  • Is it possible to have more atoms on the product side of a chemical reaction than there are on the reactant side? Explain why or
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!