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
Marianna [84]
3 years ago
6

Calculate the number of moles in a 14.5 gram sample of C4H10.

Chemistry
1 answer:
cricket20 [7]3 years ago
6 0
Moles= mass divided by molar mass
Molar mass= 12.01(4) + 1.01(10)
                 = 58.14g/mol

Moles=14.5g / 58.14g/mol
         =0.249

Therefore there are approx 0.249 moles in a 14.5g sample of C4H10
You might be interested in
What the sample will look like after the temperature is increased from 300 K to 450 KK at constant pressure?
sleet_krkn [62]

Answer:

The sample will look expanded and occupy more space.

Explanation:

Since, the pressure is constant here, but the temperature is changed. Therefore, according to Charles' Law Volume is directly proportional to Temperature, provided the pressure is kept constant. Mathematically:

V1/T1 = V2/T2

V1 = (T1/T2)(V2)

V1 = (300 k/450 k)(V2)

<u>V1 = (0.67)V2</u>

The equation indicates that The fina volume of the gas V2 will be greater than the initial volume V1. <u>Thus, sample will look expanded and occupy more space than the previous state.</u>

5 0
3 years ago
Which is a chemical property of mercury? (2 points)
nevsk [136]
D) reacts with oxygen
All other are physical properties.
4 0
3 years ago
Read 2 more answers
Predict whether the following reactions will be exothermic or endothermic.
Solnce55 [7]

Answer:

A. N₂(g) + 3H₂(g) -----> 2NH₃    exothermic

B. S(g) + O₂(g) --------> SO₂(g)    exothermic

C. 2H₂O(g) --------> 2H₂(g) + O₂(g) endothermic

D. 2F(g) ---------> F₂(g) exothermic

Explanation:

The question says predict not calculate. So you have to use your chemistry knowledge, experience and intuition.

A. N₂(g) + 3H₂(g) -----> 2NH₃    is exothermic because the Haber process gives out energy

B. S(g) + O₂(g) --------> SO₂(g)    is exothermic because it is a combustion. The majority, if not all, combustion give out energy.

C. 2H₂O(g) --------> 2H₂(g) + O₂(g) is endothermic because it is the reverse reaction of the combustion of hydrogen. If the reverse reaction is exothermic then the forward reaction is endothermic  

D. 2F(g) ---------> F₂(g) is exothermic because the backward reaction is endothermic. Atomisation is always an endothermic reaction so the forward reaction is exothermic

5 0
3 years ago
If the temperature of an area drops 8 degrees from one day the next the climate has changed.
vlabodo [156]
I would say false hope that helped
3 0
3 years ago
The diagram below shows part of the rock cycle. (6 points)
Anna35 [415]

Answer:

Igneous Rock

Explanation:

Assuming this is a cycle, the volcanic eruption would lead back to rock B; rocks formed by volcanic eruptions are considered Igneous.

4 0
2 years ago
Other questions:
  • A ruler has markings as shown below. Stefan uses this ruler to measure the length of a metal rod. How many decimal places should
    5·2 answers
  • Based on what you have learned about intermolecular forces, would you say that matter is fundamentally attracted or repulsed by
    9·1 answer
  • When an electric field is applied to a metallic crystal, the movement of electrons is?
    14·1 answer
  • Which two properties are used to define matter?
    9·1 answer
  • What is bromic acid
    12·1 answer
  • On reaction with acidified potassium dichromate(VII), two of the isomers are oxidized in two steps to produce different products
    11·1 answer
  • What happens when a crystal potassium nitrate is added to a saturated solution as it cooled
    13·1 answer
  • Hurry hurry hurry plz plz
    5·1 answer
  • What is the voltage required to push 0.5 amps of current through a 10 ohm resistor?
    14·1 answer
  • The ion formed by an atom of tin when it loses four electrons is called what?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!