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
Naddika [18.5K]
3 years ago
11

A student weighed out a 2.055 g sample of a cobalt chloride hydrate, ConClmpH2O, where n, m, and p are integer values to be dete

rmined. The student heated the sample to drive off the waters of hydration, reweighed the anhydride sample and found 1.121 g anhydrate
Chemistry
1 answer:
topjm [15]3 years ago
8 0

The given mass of cobalt chloride hydrate = 2.055 g

A sample of cobalt chloride hydrate was heated to drive off waters of hydration and the anhydrate was weighed.

The mass of anhydrous cobalt chloride = 1.121 g anhydrate.

The mass of water lost during heating = 2.055 g - 1.121 g = 0.934 g

Converting mass of water of hydration present in the hydrate to moles using molar mass:

Mass of water = 0.934 g

Molar mass of water = 18.0 g/mol

Moles of water = 0.934 g * \frac{1 molH_{2}O }{18 g H_{2}O } =0.0519 mol H_{2}O

You might be interested in
According to the authors, the most effective means of developing _______________ are instrumental chemistry, microscopy, photoma
blsea [12.9K]

Answer:

Associative Evidence

Explanation:

According to the authors, the most effective means of developing associative evidence are instrumental chemistry, microscopy, photomacrography, other optical methods, and morphology. It is used to provide the link between and evidence and individual involved in a crime.

6 0
3 years ago
In the Energy and Specific Heat lab, how should the water bath be stabilized over the heat source? Select one:
Reika [66]

Answer:

c

Explanation:

5 0
3 years ago
Read 2 more answers
Suppose you want to separate a mixture of the following compounds: salicylic acid, 4-ethylphenol, p-aminoacetophenone, and napth
Elodia [21]

Answer:

The procedure you will use in this exercise exploits the difference in acidity and solubility just described.

(a) you will dissolve your unknown in ethyl acetate (an organic solvent). All of the possible compounds are soluble in ethyl acetate.

(b) you will extract with sodium bicarbonate to remove any carboxylic acid that is present.

(c) you will extract with sodium hydroxide to remove any phenol that is present.

(d) you will acidify both of the resulting aqueous solutions to cause any compounds that were extracted to precipitate.

6 0
3 years ago
2. What is the mass of one mole of Na?
borishaifa [10]
Sodium, Atomic mass: 22.989769 g
You can see in a periodic table
5 0
3 years ago
An empty steel container is filled with 2.0 atm of H₂ and 1.0 atm of F₂. The system is allowed to reach equilibrium according to
Darina [25.2K]
H₂ (g) + F₂ (g) ⇌ 2 HF (g)

5 0
3 years ago
Other questions:
  • Butanone draw both enolates formed when the ketone is treated with base. include charges. draw the oxyanion species; do not draw
    5·1 answer
  • Which of the following substances would best be measured using mole quantities?
    10·1 answer
  • Find the Nazca plate and the South American plate. How are they different? Are they moving toward or away from each other?
    6·1 answer
  • Suppose you encounter a chemical formula with h as the cation. what do you know about this compound immediately?
    8·1 answer
  • What composes a element
    15·1 answer
  • a balloon has 0.3 moles of air inside and a volume of 7 liters after 0.2 more moles of air were blown into this balloon what is
    5·1 answer
  • A miner develops cancer of the esophagus. ten years later
    9·2 answers
  • Please help chemistry!!
    11·1 answer
  • HELP PLZZZZ GIVE BRAINLIST PLEZZ HELP!!!!!!!!!!!
    11·1 answer
  • ¿por qué la conducción ocurre más lentamente en los gases que en los sólidos?​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!