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
Evgesh-ka [11]
3 years ago
14

A 1.45 g sample of phosphorus burns in air and forms 2.57 g of a phosphorus oxide. Calculate the empirical formula of the oxide.

Express your answer as a chemical formula.
Chemistry
1 answer:
bija089 [108]3 years ago
5 0

Answer:

P2O3

Explanation:

Firstly, we know that the phosphorus would absorb oxygen from air to form its oxide. We already know the mass of the phosphorus, we can get the mass of the oxygen by subtracting the mass of the phosphorus from the mass of the oxide.

The mass of the oxygen is 2.57 - 1.45 = 1.12g

From here, we covert these masses to moles by dividing by the atomic masses of phosphorus and oxygen respectively.

The atomic mass of phosphorus is 31 while that of oxygen is 16.

P = 1.45/31 = 0.046774193548

O = 1.12/16 = 0.07

We now divide by the smallest which is that of phosphorus.

P = 0.046774193548/ 0.046774193548= 1

O = 0.07/ 0.046774193548 = 1.5

We then multiply the answers by 2 for conversion to whole numbers. Making P = 2 and O = 3

The empirical formula is thus P2O3

You might be interested in
What unit of time is based on the revolution of Earth around the sun?
aev [14]

Answer:

Hello There!!

Explanation:

The answer is B.Year

It takes 365 days for the earth to orbit the sun. 365 days is 1 year.

hope this helps,have a great day!!

~Pinky~

4 0
3 years ago
Read 2 more answers
What is the approximate temperature of 1.4 moles of a gas with a pressure of 3.25 atmospheres in a 4.738-liter container
attashe74 [19]

Answer:

134K

Explanation:

Using the ideal gas law equation;

PV = nRT

Where;

P = pressure (atm)

V = volume (Litres)

n = number of moles (mol)

R = gas constant (0.0821 Latm/Kmol)

T = temperature (K)

Based on the information provided, n = 1.4moles, P = 3.25atm, V = 4.738L, T = ?

3.25 × 4.738 = 1.4 × 0.0821 × T

15.3985 = 0.11494T

T = 15.3985/0.11494

T = 133.969

Approximately;

T = 134K

3 0
3 years ago
Two scientists are debating how to classify a new animal species that they have discovered. They observe that the animal is capa
BaLLatris [955]

Answer:

A

Explanation:

7 0
2 years ago
Read 2 more answers
Matt's cube, after 5 trial, had an average destiny of 7.40. g/cm what is it made of ?​
alekssr [168]

Explanation:

5 trial, had an average destiny of 7.40. g/cm

4 0
3 years ago
Enter your answer in the provided box. Consider the reaction: N2(g) + 3H2(g) → 2NH3(g) Suppose that a particular moment during t
Mashcka [7]

Answer:

0.0253 M/s

Explanation:

From the reaction

N₂ + 3H₂ → 2NH₃

The rate of reaction can be written as

Rate = - \frac{d[N_2]}{dt} = - \frac{1}{3} \frac{d[H_2]}{dt} = + \frac{1}{2} \frac{d[NH_3]}{dt}

From the above rate equation we can conclude that the rate of reaction of N₂ is equal to one third of the rate of reaction of H₂,

So,

Rate of reaction of molecular nitrogen = \frac{1}{3} \times 0.0759

Upon calculation, we get rate of reaction of molecular nitrogen = 0.0253 M/s

4 0
3 years ago
Other questions:
  • How much does one gallon of salt water weigh?
    14·1 answer
  • When making a fire, without gas, matches, or a lighter, what are two important things about the wood?
    10·2 answers
  • The Lewis structure of an oxygen atom should have _____________ dots drawn around the symbol .The Lewis structure of a calcium a
    11·1 answer
  • In a combustion chamber, ethane (C2H6) is burned at a rate of 8 kg/h with air that enters the combustion chamber at a rate of 17
    5·1 answer
  • PLS HELP MEEEEEEEEEEEE​
    10·1 answer
  • What is the noble gas configuration of V+3
    10·1 answer
  • Explain why vigorous exercise causes the heart rate to increase and you to also breathe faster.
    7·1 answer
  • 35
    15·1 answer
  • 2-81) When a hydrocarbon fuel is burned, almost all of the carbon in the fuel burns completely to form CO2 (carbon dioxide), whi
    12·1 answer
  • QUESTION TWO
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!