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
RoseWind [281]
3 years ago
14

A compound containing phosphorus and oxygen has a molar mass of 157.9 g/mol and an empirical formula of PO3 .

Chemistry
1 answer:
Yuki888 [10]3 years ago
3 0

<u>Answer:</u> The molecular formula of the compound is P_2O_6

<u>Explanation:</u>

The molecular formula is the chemical formula that tells about the number of atoms of each element present in a compound. Molecular formula and empirical formula can also be the same when the number of atoms is in the simplest whole-number ratio.

To calculate the molecular formula, the number of atoms of the empirical formula is multiplied by a factor known as valency that is represented by the symbol, 'n'.

n=\frac{\text{Molecular mass}}{\text{Empirical mass}}        ...(1)

Given empirical formula is PO_3

Empirical mass = [(1\times 30.97) + (3\times 15.99)]=78.94 g/mol

Molecular mass = 157.9 g/mol

Plugging values in equation 1:

n=\frac{157.9 g/mol}{78.94g/mol}\\\\n=2

Molecular formula of the compound becomes P_{2\times 1}O_{2\times 3}=P_2O_6

Hence, the molecular formula of the compound is P_2O_6

You might be interested in
Hydrogen has a volume of 1.0l and the pressure is 5.4 ATM if the initial temperature is 33 degrees c the final volume is 2.0 l a
Andre45 [30]

Answer:

487.33 K.

Explanation:

  • To calculate the no. of moles of a gas, we can use the general law of ideal gas: <em>PV = nRT.</em>

where, P is the pressure of the gas in atm.

V is the volume of the gas in L.

n is the no. of moles of the gas in mol.

R is the general gas constant.

T is the temperature of the gas in K.

  • If n is constant, and have two different values of (P, V and T):

<em>P₁V₁T₂ = P₂V₂T₁</em>

<em></em>

P₁ = 5.4 atm, V₁ = 1.0 L, T₁ = 33°C + 273 = 306 K.

P₂ = 4.3 atm, V₂ = 2.0 L, T₂ =??? K.

<em>∴ T₂ = P₂V₂T₁/P₁V₁</em> = (4.3 atm)(2.0 L)(306 K)/(5.4 atm)(1.0 L) = <em>487.33 K.</em>

5 0
3 years ago
How many moles are in 2.5L of 1.75 M Na2CO3
Natasha_Volkova [10]

Answer:

4.4 mol.

Explanation:

Hello!

In this case, since the formula for calculating the molarity is:

M=n/V

Whereas n stands for moles and V for the volume in liters; we can solve for n as shown below when we are given the volume and the molarity:

n=V*M

Thus, we plug in the given data to obtain:

n=2.5L*1.75mol/L=4.4mol

Best regards!

4 0
2 years ago
Read 2 more answers
Given the reaction: A + B &lt;--&gt; C + D
Lady_Fox [76]

Answer:

A.) 4.0

Explanation:

The general equilibrium expression looks like this:

K = \frac{[C]^{c} [D]^{d} }{[A]^{a} [B]^{b} }

In this expression,

-----> K = equilibrium constant

-----> uppercase letters = molarity

-----> lowercase letters = balanced equation coefficients

In this case, the molarity's do not need to be raised to any numbers because the coefficients in the balanced equation are all 1. You can find the constant by plugging the given molarities into the equation and simplifying.

K = \frac{[C]^{c} [D]^{d} }{[A]^{a} [B]^{b} }                                       <----- Equilibrium expression

K = \frac{[2 M] [2 M]}{[1 M] [1 M] }                                     <----- Insert molarities

K = \frac{4}{1  }                                                <----- Multiply

K = 4                                                <----- Divide

6 0
2 years ago
Zinc chloride (ZnCl2) and hydrogen (H2) are the products of a single replacement reaction. What are the reactants of this reacti
timurjin [86]

Answer:

B Zn+2HCI

Explanation:

4 0
3 years ago
Which properties make a metal a good material to use for electrical wires? malleability and reactivity conductivity and ductilit
Schach [20]
The metal properties that make up electrical wires are conductivity and ductility. Conductivity is important for free electrons to flow, hence electricity. Ductility is as well integral for strips to be formed, but with ample strength that does not break the material.
3 0
3 years ago
Read 2 more answers
Other questions:
  • What color is the 2,6-dichloroindophenol solution in acidic solutions?
    9·1 answer
  • When comparing the reaction rates for the SN2 substitution of two alkyl halides, the more hindered substrate will undergo substi
    11·1 answer
  • Which statement best describes the effect of low ionization energies and low electronegativities on metallic bonding?
    13·2 answers
  • Approximately how old is the Sun?
    11·2 answers
  • The energy diagram shown represents the chemical reaction between solid ammonium chloride and solid barium hydroxide octahydrate
    8·1 answer
  • The system co2(g) + h2(g) ⇀↽ h2o(g) + co(g) is at equilibrium at some temperature. at equilibrium a 4.00 l vessel contains 1.00
    7·1 answer
  • Help soon plz giving brainliest
    15·2 answers
  • What is the direct function of the energy released from the nuclear chain reaction in a nuclear power plant? turning the blades
    14·1 answer
  • What is the lengthening of a muscle without damage? And what is the shortening of a muscle?
    5·1 answer
  • Which phase do the chromosomes line up in the middle
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!