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
Maslowich
4 years ago
8

An 11.2 L sample of gas is determined to contain 0.5 moles of nitrogen. At the same temperature and pressure, how many moles of

gas would there be in a 20 L sample
Chemistry
2 answers:
Volgvan4 years ago
8 0

Answer:

0.89 moles of N2 gas

Explanation:

From Avogadro's law:

V1/n1 = V2/n2

n2 = V2n1/V1

V1=11.2L

V2= 20L

n1=0.5 moles

n2 = ??

Therefore

n2= 20×0.5/11.2= 0.89 moles

Anit [1.1K]4 years ago
3 0

Answer:

0.8929 mol

Explanation:

An 11.2-L sample of gas is determined to contain .50 mol N2. at the same temperature and pressure, how many moles of gas would there be in a 20. -L sample?

According to avogadro's law

\frac{V_1}{n_1} = \frac{V_2}{n_2}

From the given data

V1 = 11.2L

n1 = 0.5mole

V2 = 20L

n2 =?

\frac{11.2}{0.5} = \frac{20}{?}

22.4=\frac{20}{?} \\\\= \frac{20}{24} \\\\= 0.8929

= 0.8929 mol

You might be interested in
Based on the chemical equation, use the drop-down menu to choose the coefficients that will balance the chemical equation:
zzz [600]

Answer:

1

1

1

1

Explanation:

the equation is balancing

4 0
3 years ago
Read 2 more answers
PLZZZ HELP CHEMISTRY QUESTION DOWN BELOW IMAGE SHOWWN BELOW
vladimir1956 [14]
Don’t click that!! :)
4 0
3 years ago
Copper has two naturally occurring isotopes. Cu−63 has a mass of 62.939 amu and relative abundance of 69.17%.
fiasKO [112]
The answer is 64.907 amu.

The atomic mass of an element is the average of the atomic masses of its isotopes. The relative abundance of isotopes must be taken into consideration, therefore:
atomic mass of copper = atomic mass of isotope 1 * abundance 1 + atomic mass of isotope 2 * abundance 2

We know:
atomic mass of copper = 63.546 amu
The atomic mass of isotope 1 is: 62.939 amu
The abundance of isotope 1 is: 69.17% = 0.6917
The atomic mass of isotope 1 is: x
The abundance of isotope 2: 100% - 69.17% = 30.83% = 0.3083

Thus:
63.546 amu = 62.939 amu * 0.6917 + x * 0.3083
63.546 <span>amu = 43.535 amu + 0.3083x
</span>⇒ 63.546 amu - 43.535 amu = 0.3083x
⇒ 20.011 amu = 0.3083x
   ⇒ x = 20.011 amu ÷ 0.3083 = 64.907 amu
7 0
4 years ago
WILL GIVE BRANLIEST TO FIRST ANSWER!!! I know the correct answer is either a or d. Can anyone explain which one it is and why? C
oee [108]

Answer: The IUPAC name of CH_3C\equiv CCH_2CH_2Cl is 5-chloro-2-pentyne

Explanation:

1. First select the longest possible carbon chain.  For the number of carbon atom, we add prefix as 'meth' for 1, 'eth' for 2, 'prop' for 3, 'but' for 4, 'pent' for 5, 'hex' for 6, 'sept' for 7, 'oct' for 8, 'nona' for 9 and 'deca' for 10.

2. The longest possible carbon chain should contain all the bonds and functional groups.

3. The numbering is done in such a way that the carbon containing the functional group or substituent gets the lowest number. Triple bond is given priority over substituent halogen.

4. The naming of alkane is done by adding the suffix -ane, alkene by adding the suffix -ene, alkyne.

Thus the IUPAC name of CH_3C\equiv CCH_2CH_2Cl is 5-chloro-2-pentyne

4 0
3 years ago
A 200.0 mL solution of 0.40 M ammonium chloride was titrated with 0.80 M sodium hydroxide. What was the pH of the solution after
Rus_ich [418]

Answer:

pH = 9.25

Explanation:

Step 1: Data given

Volume of a 0.40 M NH4Cl solution = 200.0 mL = 0.200 L

Molarity of NaOH = 0.80 M

Volume of NaOH = 50.0 mL

The Kb of ammonia is 1.76×10^-5

Step 2: The balanced equation

NH4Cl + NaOH → NH3 + NaCl + H2O

Step 3: Calculate moles

Moles NH4Cl  = molarity *¨volume

Moles NH4Cl = 0.40 M * 0.200 L = 0.08 moles

Moles NaOH = 0.80 M * 0.050 L = 0.04 moles

Step 4: Calculate limiting reactant

NaOH will completely be consumed. (0.04 moles). NH44Cl is in excess. There will react 0.04 moles .there will remain 0.04 moles.

Step 5: Calculate moles NH3

Moles NH3 = for 0.4 moles NH4Cl we'll have 0.4 moles NH3

Step 6: Calculate molarity

Molarity = moles / volume

Molarity = 0.4 moles = 0.250 L

Molarity = 1.6 M

Step 7: Calculate pOH

pOH = pKb + log ([B+]/[BOH])

pOH = 4.75 + log (1.6 / 1.6)

pOH = 4.75

Step 8: Calculate pH

pH = 14 - 4.75

pH = 9.25

3 0
3 years ago
Other questions:
  • Someone please help me, i really need help!
    5·1 answer
  • What is the square root of 25
    9·2 answers
  • If you were given a 16.0 ml sample of solution A, describe how you could determine the mass of the sample using only your graph
    8·1 answer
  • What molecules can be used for long-term energy storage?
    11·2 answers
  • What effect will the number of particles and temperature have on the rate of diffusion of gas molecules?
    10·2 answers
  • How many atoms are in this formula? 2 Fe 1 2 3 4
    7·1 answer
  • Nuclear Fission and Nuclear Fusion
    8·2 answers
  • Ragav: is it a part of a living being? Sophie: yes it is Ragav: Is that living being an animal? Sophie: No, it's not. Ragav: doe
    9·1 answer
  • NaOH(aq) + MgSO4(aq) →
    5·1 answer
  • Heat is a form of energy transfer from a _____________________ _______________________ location to a_____________________ ______
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!