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
jasenka [17]
3 years ago
14

You want to make 100 mL of a 2.5 M stock solution of calcium chloride (molecular weight 110.98 g/mol). How many grams of calcium

chloride do you need to weigh out in order to make this solution? Round your answer to the nearest tenth of a gram.
Chemistry
1 answer:
Evgesh-ka [11]3 years ago
5 0

Answer:

27.7 g

Explanation:

  • 100 mL = 0.100 L

To solve this problem we use the definition of <em>molarity</em>:

  • M = mol / L

From the problem we're given M = 2.5 M and volume = 0.100 L. We use the above formula and <u>calculate the required moles of calcium chloride</u> (CaCl₂):

  • 2.5 M = moles / 0.100 L
  • moles = 0.25 moles CaCl₂

Finally we use the<em> molecular weight</em> of calcium chloride to <u>calculate the required mass</u>:

  • 0.25 moles CaCl₂ * 110.98 g/mol = 27.745 g CaCl₂

Rounding to the nearest tenth of a gram the answer is 27.7 g.

You might be interested in
The properties of several unknown solids were measured. Solid Melting point Other properties A &gt;1000 °C does not conduct elec
zhenek [66]

Explanation:

A solid compound formed by chemical reaction of a positively charged cation with a negatively charged anion is known as ionic solid. Ionic bonds exist between an ionic solid.

When dissolved in water, ionic solids dissociate into ions. Hence, they are able to conduct electricity as electricity is the flow of ions or electrons.

A molecular solid is a solid in which molecules are held together by Vander waal forces. They do not conduct electricity as there is no unbalanced charge on the compound.

Solids in which atoms of metal are held together by metallic bonds are known as metallic solids. These conduct electricity when present in solid state for bond overlap.

A covalent solid is a substance in which atoms are held together by covalent bonds. They do not conduct electricity and have high melting point.

Thus, we can conclude the following.

  • A >1000 °C does not conduct electricity : Covalent solids
  • B 850 °C conducts electricity in the liquid state, but not in the solid state : Ionic solid
  • C 750 °C conducts electricity in the solid state : Metallic solid
  • D 150 °C does not conduct electricity : Molecular solid

 

6 0
3 years ago
Read 2 more answers
What is the most soluble in water? iconic, covalent, metallic or nonmetallic
Sonja [21]
Iconic is most soluble in water
4 0
2 years ago
All matter on earth contains energy
Dafna11 [192]
Yes; every object has energy and you cannot create or destroy energy but you can transfer it. 
6 0
3 years ago
Please help me with this question
Tcecarenko [31]

Answer:

Moon

Explanation:

5 0
3 years ago
An isotope has three forms. 30% have a mass of 15 amu, 20% have a mass of 16 amu and 50% have a mass of 17 amu. What is the aver
murzikaleks [220]

Answer:

Explanation:

a

3 0
3 years ago
Other questions:
  • The U.S. requires automobile fuels to contain a renewable component. The fermentation of glucose from corn produces ethanol, whi
    5·1 answer
  • It has been estimated that 8.0 x 10^4 tons of gold (Au) have been mined. Assume gold costs $1350 per troy ounce. What is the tot
    5·1 answer
  • How many mol of lithium are there in 1.204 x 1024 lithium atoms
    11·1 answer
  • Help asap!!!!!!!!<br><br> How much net force is required to accelerate a 50.00 kg mass at 4.00 m/s??
    13·1 answer
  • When the following redox equation is balanced with smallest whole number coefficients, the coefficient for the iodide ion will b
    12·1 answer
  • Given an element with seven valence electrons, how many chemical bonds will usually form?
    9·2 answers
  • What is a neutralization reaction?
    5·2 answers
  • 4. What is the common name of the compound CaOCI,?​
    11·1 answer
  • Why did plants perform cellular respiration?
    5·2 answers
  • The bacteria are known to be prokaryotes. Prokaryote means
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!