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
Gennadij [26K]
4 years ago
5

A 200.0mL flask of unknown gas was placed in a hot water bath. The temperature of the bath was found to be 99 degrees C. The pre

ssure of the flask was 733mmHg. The flask with the unknown gas in it had a mass of 126.593g. The same flask weighed 125.623g when it was empty. Determine the mass f the unknown gas in the flask. Determine the Molar Mass of an unknown gas. (Assume that the Ideal Gas Law is obeyed and use R= 0.0821 L atm/mol K SHOW ALL WORK.)
Chemistry
1 answer:
masya89 [10]4 years ago
8 0
A. Mass of the unknown gas.

The mass of the unknown gas is calculated by subtracting the weight of the empty flask from the mass when there was air in it.

      m = 126.593 g - 125.623 g

Simplifying,
     m = 0.97 grams

b. Molar mass of the gas
The molar mass of the gas is calculated by the ideal gas law.

                PV = (m/M)RT

where P is pressure,V is volume, m is the mass, M is the molar mass, R is the universal gas constant, and T is temperature. Substituting the known values to the equation,

     (733 mmHg/760 mmHg/atm)(0.20 L) = (0.97 g/M)(0.0821 L.atm/molK)(99 + 273.15 K)

The value of M in the equation is 153.64 g/mol.

<em>Answer: 153.64 g/mol</em>

You might be interested in
Chemistry homework about elements and compounds.
galben [10]
1. 3 elements, Mg: 1, S: 1, O: 4
2. 3 elements, Li: 3, P: 1, O: 4
3. 3 elements, H: 2, S: 1, O: 4

1. KOH
2. AlOH
3. AlSO4
8 0
3 years ago
What is the molar ratio between carbon dioxide to water?<br> 2 C4H10 + 13 O2 = 8 CO2 + 10 H2O
jok3333 [9.3K]

Answer:

8:10

Explanation:

The coefficients of a balanced chemical equation give us the mole ratios. The coefficient of carbon dioxide here is 8 and water is 10.

6 0
3 years ago
Find the molarity of the following solutions: 0.5 moles of sodium chloride is dissolved to make 0.05 liters of solution.
vredina [299]
M(molarity)=moles/volume
M=.5mol/.05L=10M
4 0
3 years ago
Who created the planetary model of the atom?
shtirl [24]
The answer is Rutherford.
4 0
3 years ago
A. Calculate the empirical formula of a molecule with percent compositions: 55.3% potassium (K), 14.6% phosphorus (P), and 30.1%
Otrada [13]
The way you calculate the empirical formula is to firstly assume 100g. To find each elements moles you take each elements percentage listed, times it by one mole and divide it by its atomic mass. (ex: moles of K =55.3g x 1 mole/39.1g, therefore there is 1.41432225 moles of Potassium) Once you’ve completed this for every element you list each elements symbol beside it’s number of moles and divide by the smallest number because it can only go into its self once. After you’ve done this, you’ve found your empirical formula, which is the simplest whole number ratio of atoms in a compound. I’ve added an example of a empirical question I completed last semester :)

6 0
3 years ago
Read 2 more answers
Other questions:
  • According to the following thermochemical equation, what mass of H2O (in g) must form in order to produce 488 kJ of energy?
    13·1 answer
  • The satellite image above shows a portion of the Namib Desert in Africa. This is an ancient, sandy desert with dunes that can be
    6·1 answer
  • The metal rhodium (Rh) has an FCC crystal structure. If the angle of diffraction for the (311) set of planes occurs at 36.12° (f
    8·1 answer
  • g Suppose you are titrating an acid of unknown concentration with a standardized base. At the beginning of the titration, you re
    7·1 answer
  • QY
    15·1 answer
  • What is the mass of insoluble calcium phosphate produced from .555 grams of calcium chloride​
    10·1 answer
  • What is science and why we use science ​
    13·2 answers
  • HELP PLZZZZ GIVE BRAINLIST PLEZZ HELP!!!!!!!!!!!
    11·1 answer
  • Describe what a moraine is made of and explain how this glacial feature forms.
    5·1 answer
  • What would be the mass, in grams, of 2.408 x 1024 molecules of tetraphosphorus decaoxide?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!