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
Marrrta [24]
3 years ago
15

How many moles of methane were in the erlenmeyer flask?

Chemistry
2 answers:
DanielleElmas [232]3 years ago
5 0

Since the question is incomplete, I can help you with a detailed explanation on how to calculate the number of moles of mehate in an erlenmeyer flask.


There are two possible scenaries for this question.


1) Scenary I. Known mass.


Whether you are given the mass or other information that permits to calculate the mass of methane, you can work with the molecular formula to calculate the number of moles, in this way:


i) Methane chemical formula: CH₄


ii) Molar masss: sum the mass of each element in the formula, using the atomic mass and number of atoms of each.


Molar mass = 12.011 g/mol + 4× 1.008 g/ mol = 16.043 g/mol


iii) Number of moles


Formula: number of moles = mass in grams / molar mass = mass in grams / 16.043 g/mol.


That is it. Use the last formula to calculate the number of moles of methane.


2) Scenary 2. P, T,and V known.


You do not know the mass but the conditions: temperature (T), volume (V), and pressure (P).


In this case you use the ideal gas equation:


PV = nRT, from which you clear for the number of moles (n):


n = PV/(RT).


Plug in the data of P, V and T in coherent unit system.


R is the universal law of gases, which you must also use with the appropiate units, depending on the units of P, V, and T used.


For example, R = 0.0821 atm×liter / (K×mol); and R = 8.314 KPa×liter/(mol×K).

Savatey [412]3 years ago
4 0
Methane Volume : O.O
Methane Mass: 0.100g
Molar Mass of Methane : 16.04 g/mol
You might be interested in
All of the following are true except foreshocks can happen before an earthquake aftershocks can happen after an earthquake fores
Snowcat [4.5K]
Foreshocks and aftershocks can happen at the same time is not true. 
4 0
2 years ago
23.5 L of h2 is stored at a pressure of 58.7 Kpa what volume would the gas take up at stp
stepan [7]

Answer:-  13.6 L

Solution:- Volume of hydrogen gas at 58.7 Kpa is given as 23.5 L. It asks to calculate the volume of hydrogen gas at STP that is standard temperature and pressure. Since the problem does not talk about the original temperature so we would assume the constant temperature. So, it is Boyle's law.

Standard pressure is 1 atm that is 101.325 Kpa.

Boyle's law equation is:

P_1V_1=P_2V_2

From given information:-

P_1 = 58.7 Kpa

V_1 = 23.5 L

P_2 = 101.325 Kpa

V_2 = ?

Let's plug in the values and solve it for final volume.

58.7Kpa*23.5L=101.325Kpa*V_2

On rearranging the equation for V_2

V_2=\frac{58.7Kpa*23.5L}{101.325Kpa}

V_2 = 13.6 L

So, the volume of hydrogen gas at STP for the given information is 13.6 L.

3 0
3 years ago
How many grams of Na2So4 would be formed if 0.75 moles of NaOH reacted?
Nata [24]

Answer:

\boxed{\text{53 g }}

Explanation:

You don't give the reaction, but we can get by just by balancing atoms of Na.

We know we will need the partially balanced equation with masses, moles, and molar masses, so let’s gather all the information in one place.

M_r:                                 142.04  

             2NaOH + … ⟶ Na₂SO₄ + …  

n/mol:      0.75

1. Use the molar ratio of Na₂SO₄ to NaOH to calculate the moles of NaF.

Moles of Na₂SO₄ = 0.75 mol NaOH × (1 mol Na₂SO₄/2 mol NaOH

= 0.375 mol Na₂SO₄

2. Use the molar mass of Na₂SO₄ to calculate the mass of Na₂SO₄.

Mass of Na₂SO₄ = 0.375 mol Na₂SO₄ × (142.04 g Na₂SO₄/1 mol Na₂SO₄) = 53 g Na₂SO₄

The reaction produces \boxed{\text{53 g }} of Na₂SO₄.

4 0
3 years ago
Ve. In what layer do weather balloons fly?<br><br> Earth layers
galben [10]

Answer:

stratosphere

Explanation:

6 0
2 years ago
11.You and a friend find a rusty wire coat hanger near the
gtnhenbr [62]

Answer:

because he would've not known properly about it!

7 0
2 years ago
Other questions:
  • To form a salt compound, the acid contributes the __ ion, and the base contributes the ___ ion
    15·1 answer
  • How many joules of heat are required to heat 125 g aluminum from 19.0°C to 95.5°C?
    13·2 answers
  • Determine the mass in grams of 125 mol of neon
    10·1 answer
  • Express (158 lb)2 to three significant figures with appropriate units
    8·2 answers
  • All of the following metals replace hydrogen of an acid except.........
    6·1 answer
  • Balance this equation. If a coefficient of "1" is required, choose "blank" for that box.
    14·2 answers
  • What is the electronic configuration of the following atoms?
    8·1 answer
  • In an experiment, equal amounts of water and soil were first heated and then left to cool. The graph shows the change in tempera
    8·2 answers
  • If pea plants with the genotypes RR and rr cross, what genotype will their offspring all have?
    13·2 answers
  • Given the following reaction:
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!