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
mina [271]
3 years ago
5

A rigid canister holds 50.0 L of helium gas at 32.0°C and 49.9 kPa. The gas is cooled until the pressure reaches 14.2 kPa. What

is the Kelvin temperature of the helium?
Chemistry
1 answer:
xeze [42]3 years ago
8 0

Answer:-

86.794 K

Explanation:-

Initial temperature T 1 = 32 C + 273 = 305 K

Initial Pressure P 1 = 49.9 KPa

New Pressure P 2 = 14.2 KPa

The Volume remains same since it is rigid.

∴V 1 = V 2 = 50.0 L

Using the relation

P 1 V 1 / T1 = P 2 V 2 / T 2

New temperature T 2 = P 2 V 2 T 1 / ( P 1 V 1)

= 14.2 KPa x 50.0 L x 305 K / ( 49.9 KPa x 50.0 L)

= 86.794 K

You might be interested in
Ascorbic acid, of vitamin c (c6h8o6), is an essential vitamin. it cannot be stored by the body and must be present in the diet.
Inessa [10]

Molecular formula of ascorbic acid is C_{6}H_{8}O_{6}

Molar mass of ascorbic acid = (6 * 12 g/mol) + (8 * 1 g/mol) + (6 * 16 g/mol) = 176 g/mol

Converting 500.0 mg of ascorbic acid to moles: We use molar mass of ascorbic acid to convert mass to moles.

500.0 mg * \frac{1 g}{1000 g} *\frac{1 mol}{176 g} =   0.00284 mol

Converting 500.0 mg of ascorbic acid to molecules: The conversion factor used is 1 mole = 6.022*10^{23} molecules

500.0 mg * \frac{1 g}{1000 mg}*\frac{1 mol}{176 g} * \frac{6.022*10^{23}molecules}{1 mol} = 1.71 * 10^{21} molecules

5 0
3 years ago
Read 2 more answers
How is potential measured?
wolverine [178]
Potential energy is measured In joules (j)
5 0
2 years ago
Lauren walks 100m in half a minute. What must her speed have been to travel this distance?
tester [92]

Answer:

10/3 m/s. v=d/t. so 100/30 = 10/3

4 0
3 years ago
What happens in this reaction? <br><br> butan-1-amine + CH3I --&gt;
Galina-37 [17]

Here we have to get the product between the reaction of butane-1-amine with methyl iodide (CH₃I).

The  reaction between 1 mole of butan-1-amine and 1 mole of methyl iodide produces Methyl-butamine which is a secondary amine.

However, In presence of 2 moles of methyl iodide the reaction proceed to N, N-di-methylbutamine. The reaction is shown in the figure.

This is one of the effective reaction method to generate secondary and tertiary amine from primary amine.

The primary amine reacts with alkyl iodide to form secondary to tertiary amine. The final product depends upon the quantity of the alkyl iodide present in the reaction.

7 0
3 years ago
Any groups present on a benzene ring can impact the success and regioselectivity of an electrophilic aromatic substitution. Dete
r-ruslan [8.4K]

Answer:

Explanation:

In electrophilic aromatic substitution, the substituent(s) that favors electrophilic attack is said to be ortho or para to the substituent. Meta directors are deactivators. Altogether, these directors have an integral role to play in the success and regioselectivity of electrophilic aromatic substitution reactions.

From the information given: The;

Strongly deactivating meta- director  ⇒ NO₂ (nitro group)

Moderately deactivating meta- director  ⇒ CN (cyano group)

Strongly activating ortho-/para- director ⇒ OH (hydroxy; group)

Weakly deactivating ortho-/para- director ⇒ -X (halide group)

Weakly activating ortho-/para- director ⇒ - Ph  (phenyl group)

4 0
3 years ago
Other questions:
  • A protein subunit from an enzyme is part of a research study and needs to be characterized. A total of 0.155 g of this subunit w
    9·1 answer
  • What is percent composition of carbon in c2h6o3
    12·1 answer
  • Which is the correct order of material in terms of reflectivity from least to greatest
    10·1 answer
  • On Earth, the mass of one of the lunar landing modules used to explore the moon was measured to be about 4,200 kg. The accelerat
    7·2 answers
  • Give the name for the strongest intermolecular interaction between the substrate and the following amino acids on the star prote
    13·1 answer
  • What is the change in internal energy (ΔΕ) of a system when 5 kJ of work is done on the system while it releases 13 kJ of energy
    7·1 answer
  • Explain why pentane has a higher boiling point than butane
    13·1 answer
  • Differentiate between Mendeleev's Period law and Modern Periodic law<br>​
    14·1 answer
  • Number of moles in 31.99g O2 <br> And 176.8g NaCl
    15·1 answer
  • You find out
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!