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
Leokris [45]
3 years ago
13

How many moles are in 18g of sugar(C6H12O6)

Chemistry
1 answer:
valentinak56 [21]3 years ago
6 0
1 mole of { C }_{ 6 }{ H }_{ 12 }{ O }_{ 6 } is 180 grams. (Molar mass).

18 is \frac { 1 }{ 10 } of 180 , so it means 18 grams of { C }_{ 6 }{ H }_{ 12 }{ O }_{ 6 } is \frac { 1 }{ 10 } moles

To find a molecule's molar mass, you should multiply each atom's number with their atomic mass, in the molecule and add them I mean, there are 6 Carbon atoms, 12 Hydrogen atoms and 6 Oxygen atoms. So,

Atomic mass of Carbon is approximately, 12 amu (atomic mass unit), Hydrogen's is approximately, 1 and Oxygen's is approximately, 16. So :

{ C }_{ 6 }{ H }_{ 12 }{ O }_{ 6 }\\ \\ C\quad \cong \quad 12\quad amu\\ H\quad \cong \quad 1\quad amu\\ O\quad \cong \quad 16\quad amu\\ \\ (6\cdot 12)+(12\cdot 1)+(6\cdot 16)\\ \\ 72+12+96=180\quad amu\\ \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \\ This\quad is\quad the\quad \\ glucose\quad molecule's\\ molar\quad mass\\ \\

You might be interested in
The chart shows the solubility of different substances.
Annette [7]
Answer: 1) Temperature can change the solubility of a solute.

Explanation:

The chart is missing so there is no way to tell what does the graph show.

Yet, I can help you because I can explain the status of each statement of the choices. As you will see there is only one possibility..

<span>1) Temperature can change the solubility of a solute.

Yes, temperature definetly can, and mostly do, modify the solubility of a solute.

You can search any chart of solubility and will find that.

I can give you two examples:

a) Sodium chloride: dissolve some spoons of salt in a cold water  until you can not dissolve more. Then, heat the water, you will find that more salt will get dissolved, proving that the temperature of the solution increases the solubility of sodium chloride.

b) Carbon dioxide gas: the soft drinks have CO₂ molecules dissolved in it.
 
The higher the temperature of the soft drink the less the amount of CO₂(g) that can be dissolved. That is why the soda bottling plants cool the beverage before adding the CO₂(g).

2) </span><span>Temperature has no affect on the solubility of a solute.

Since this is the opposite to the first statement and the first is true, this is false.

3) Salt has a greater solubility than sugar.

False.

This is an empirical result, which you cannot predict theoretically. So you need to see at the data either in a table or in a chart. Else you can test it at home. After the empirical data are shown it results that more grams of sugar can be dissolved in water compared to salt.

That is something you ca see in a chart or you can prove by yourself.

4) Nitrite salt has a greater solubility than sugar. </span>

False.

Looking at some data you can find that sodium nitrite solutiliby is aroun  70 - 100 g/10 g while sugar (sucrose) solutiblity is around 180 - 235 g/ 100 g.

8 0
3 years ago
Read 2 more answers
Brj fceq wej plz come everyone <br><br>only girl​
Fittoniya [83]

Explanation:

what is this guy's

tellllll me clearly

5 0
2 years ago
Read 2 more answers
Why is the electron in a Bohr hydrogen atom bound less tightly when it has a quantum number of 3 than when it has a quantum numb
Vadim26 [7]

Answer: An electron having a quantum number of one is closer to the nucleus

Explanation:

The Bohr model relies on electrostatic attraction between the nucleus and orbital electron. Hence, the closer an electron is to the nucleus the more closely it is held by the nucleus and the lesser its energy (the more stable the electron is and the more difficult it is to ionize it). The farther an electron is from the nucleus ( in higher shells or energy levels), the less the electrostatic attraction of such electron to the nucleus due to shielding effect. Hence it is less tightly held.

3 0
3 years ago
Read 2 more answers
For a particular reaction at 235.8 °C, ΔG=−936.92 kJ/mol , and ΔS=513.79 J/(mol⋅K) . Calculate ΔG for this reaction at −9.9 °C.
Rudik [331]

Answer:

-138.9 kJ/mol

Explanation:

Step 1: Convert 235.8°C to the Kelvin scale

We will use the following expression.

K = °C + 273.15 = 235.8°C + 273.15 = 509.0 K

Step 2: Calculate the standard enthalpy of reaction (ΔH°)

We will use the following expression.

ΔG° = ΔH° - T.ΔS°

ΔH° = ΔG° / T.ΔS°

ΔH° = (-936.92kJ/mol) / 509.0K × 0.51379 kJ/mol.K

ΔH° = -3.583 kJ (for 1 mole of balanced reaction)

Step 3: Convert -9.9°C to the Kelvin scale

K = °C + 273.15 = -9.9°C + 273.15 = 263.3 K

Step 4: Calculate ΔG° at 263.3 K

ΔG° = ΔH° - T.ΔS°

ΔG° = -3.583 kJ/mol - 263.3 K × 0.51379 kJ/mol.K

ΔG° = -138.9 kJ/mol

8 0
3 years ago
What is the mass of 1.25 L of ammonia gas at STP
Alex73 [517]

Answer:

mass 1.25 Liters NH₃(gas) = 0.949 grams (3 sig-figs)

Explanation:

At STP (Standard Temperature-Pressure conditions => 0°C(=273K) and 1atm pressure,  1 mole <u>any</u> gas will occupy 22.4 Liters.

So, given 1.25 Liters ammonia gas at STP, convert to moles then multiply by formula wt. (17g/mole gives mass of NH₃.

moles NH₃(gas) = 1.25L NH₃(gas)/22.4L NH₄(gas)· NH₃(gas)mole⁻¹ = 0.0558 mole NH₃(gas).  

Converting to grams NH₃(gas) = 0.0558 mole NH₃(gas) x 17 g·mol⁻¹ = 0.949 grams NH₃(gas).

7 0
3 years ago
Other questions:
  • Please complete the sentence. The parts of any kind of __________, including trail mix, soda, and air, keep their properties.
    10·1 answer
  • What is the atomic mass of an element if 4.00 grams of it contains 2.98x1022 atoms ?
    15·2 answers
  • What is the difference between an atom and an element
    15·1 answer
  • Copper is plated on zinc by immersing a piece of zinc into a solution containing copper(II) ions. In the plating reaction, coppe
    7·1 answer
  • A student places a 12-gram cube of ice inside a container. After six hours, the student returns to observe the contents of the c
    10·2 answers
  • Pls help ill mark as brainliest :)
    11·1 answer
  • Consider the following enthalpy diagram and enthalpies of intermediate and overall chemical reactions.
    12·2 answers
  • Can somebody plz help answer this science questions (only 1-2 sentences is good thx !
    6·1 answer
  • Identify the type of the bond​
    13·1 answer
  • Convert 4.8 moles of calcium carbonate to<br> particles.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!