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
Tasya [4]
3 years ago
14

Washing soda, a compound used to prepare hard water for washing laundry, is a hydrate, which means that a certain number of wate

r molecules are included in the solid structure. Its formula can be written as Na₂CO₃⋅xH₂O, where x is the number of moles of H₂O per mole of Na₂CO₃. When a 3.837 −g sample of washing soda is heated at 25 ∘C, all the water of hydration is lost, leaving 1.42 g of Na₂CO₃.
What is the value of x?
Chemistry
1 answer:
nadya68 [22]3 years ago
4 0

Answer:

moles H₂O = 10

Explanation:

The mass of Na₂CO₃⋅xH₂O is 3.837 g and the mass of Na₂CO₃ is 1.42g

Therefore the mass of xH₂O is 3.837 - 1.42 = 2.417 g

The molar mass of Na₂CO₃ is 106 g/mol and for H₂O is 18 g/mol

The moles of Na₂CO₃ and H₂O in the sample are:

Na₂CO₃ = 1.42 / 106 = 0.01340 moles

H₂O = 2.417 / 18 = 0.1343

Now using rule of three :

1 mole of Na₂CO₃ has x moles of H₂O

0.01340 moles of Na₂CO₃ has 0.1343 moles of H₂O

x = 1 * 0.1343 / 0.01340 = 10

You might be interested in
I really need help with this assignment
Mumz [18]

Answer:

A. Sublimation of camphor

8 0
3 years ago
The distance between two points on a map is 0.704 kilometers. What is the distance in meters?
loris [4]
704 meters is the answer
6 0
3 years ago
Read 2 more answers
List the characteristics of life that plants and animals in a food web share
Stolb23 [73]

Answer:They are movement, nutrition, respiration, sensitivity, reproduction, excretion,and growth.

Explanation:

8 0
2 years ago
Read 2 more answers
Find the moler mass of P2S3
Anon25 [30]

Answer:

158.2 g/mol

Explanation:

8 0
3 years ago
Where is the kinetic energy GREATEST?
Zarrin [17]
Kinetic Energy is greatest at the bottom of the highest point
4 0
3 years ago
Other questions:
  • Imagine if you are given a mystery element
    5·1 answer
  • Which instrument is used to measure the gain or loss of heat?
    15·2 answers
  • Which nonmetal is likely to be least reactive
    12·2 answers
  • If you looked at a glass containing a solution and a glass containing a suspension, how could you tell which glass contained the
    14·1 answer
  • Which of the following represents a chemical change?
    8·1 answer
  • Which describes the correct number and types of atoms in this molecular structure?
    13·1 answer
  • Given the reaction: 4Na + O2 → 2Na2O How many moles of oxygen are completely consumed in the production of 1.00 mole of Na2O?
    9·2 answers
  • What are your thoughts on Galileo's idea about motion? i need the answer pls​
    6·1 answer
  • Nguyên tố A có nguyên tử khối nặng gấp 4 lần nguyên tử oxi. A là
    11·1 answer
  • Wasting my points here who wants them?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!