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
Liula [17]
3 years ago
13

Ethanedioic acid, a compound that is present in many vegetables, has a molar mass of 90.04 g/mol and a composition of 26.7% Carb

on, 2.2% Hydrogen, and 71.1% oxygen. Calculate the empirical formula and determine the compound formula.
Chemistry
1 answer:
aleksandrvk [35]3 years ago
4 0

Answer:

Empirical CHO2

Molecular C2H2O4

Explanation:

To determine the formulas, firstly, we need to divide the percentage compositions by the atomic masses.

Kindly note that the atomic mass of carbon, oxygen and hydrogen are 12, 16 and 1 respectively. We proceed with the division as follows:

C = 26.7/12 = 2.225

H = 2.2/1 = 2.2

O = 71.1/16 = 4.44375

We then proceed to divide by the smallest value which is 2.2 in this case

C = 2.25/2.2 = 1

H = 2.2/2.2 = 1

O = 4.44375/2.2 = 2

Thus, the empirical formula is CHO2

We now proceed to get the molecular formula as follows

[12+ 1 + 16(2) ]n = 90.04

45n = 90.04

n = 90.04/45 = 2

The molecular formula is :

C2H2O4

You might be interested in
Which statement is true about Atoms
ankoles [38]

They have protons that are identical...

6 0
3 years ago
Which statement describes one feature of Rutherford model of the atom
serious [3.7K]

\huge{ \color{magenta}{ \fcolorbox{magenta}{black}{ \huge{ \color{white}{ \fcolorbox{aqua}{black}{♡Answer♡ }}}}}}

<em><u>The Rutherford model shows that an atom is mostly empty space, with electrons orbiting a fixed, positively charged nucleus in set, predictable paths.</u></em>

6 0
2 years ago
0.352 g sample of a diprotic acid is dissolved in water and titrated with 0.150 M NaOH.0.150 M NaOH. What is the molar mass of t
Aliun [14]
<h3>Answer:</h3>

128.94 g/mol

<h3>Explanation:</h3>

Given;

Mass of diprotic acid, H₂X =0.352 g

Molarity of NaOH = 0.150 M

Volume of the NaOH = 36.4 mL

We are required to calculate the molar mass of the acid.

Note: A diprotic acid is an acid that contains 2 replaceable hydrogen atoms

<h3>Step 1: Write the balanced equation fro the reaction;</h3>

The balanced equation for the reaction between the diprotic acid and NaOH will be;

H₂X(aq) + 2NaOH(aq) → Na₂X(aq) + 2H₂O(l)

<h3>Step 2: Determine the number of moles of NaOH used </h3>

Given the molarity and volume of NaOH we can calculate the number of moles;

Moles of NaOH = Molarity × Volume

                          = 0.150 M × 0.0364 L

                         = 0.00546 moles

<h3>Step 3: Use the mole ratio to determine moles of the acid </h3>

From the equation;

1 mole of the acid reacts with 2 moles of NaOH

Therefore; H₂x : NaOH = 1 : 2

Moles of H₂x = 0.00546 moles ÷ 2

                      = 0.00273 moles

<h3>Step 4: Determine the molar mass of the acid.</h3>

Molar mass is the mass equivalent to 1 mole of a compound or element

From our calculations;

0.00273 moles = 0.352 g of the acid;

Therefore, mass in 1 mole ;

= 0.352 g ÷ 0.00273 moles

= 128.94 g/mol

Thus, the molar mass of the diprotic, H₂X is 128.94 g/mol

7 0
3 years ago
Is rust a pure substance or a mixture? &lt;3
Naddik [55]
Iron is a pure substance
6 0
3 years ago
Read 2 more answers
How many seconds are in 5 hours
vfiekz [6]
18000 seconds = 5 hours
8 0
3 years ago
Read 2 more answers
Other questions:
  • Which of these statements about hydrogen bonds is not true?
    6·2 answers
  • Why do different chemicals emit different colors of light, and why is the color emitted specific to that chemical?
    13·1 answer
  • How many grams of al are in 4.70 moles?
    7·1 answer
  • How much has CO2 in the atmosphere increased since the Industrial<br> Revolution?
    12·1 answer
  • The reaction          3 BrO- (aq) --&gt; BrO3- (aq) + 2 Br - (aq) in basic solution is second order in BrO-(aq) with a rate cons
    14·1 answer
  • Burning magnesium gives us magnesium oxide. This is an example of a reaction.
    14·2 answers
  • Given the rate equation, when the concentration of A is doubled while that of B is halved, the rate will Given the rate equation
    5·1 answer
  • Stars form inside giant clouds of gas and dust. What are these giant clouds of gas and dust called?
    13·2 answers
  • In a titration to find the concentration of 30ml of a H2SO4 solution, a student found that 40ml of 0.2M KOH solution was needed
    8·1 answer
  • PLEASE HELP!!
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!