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
agasfer [191]
3 years ago
9

What is the molarity of solution obtained when 5.71 g of sodium carbonate-10-water is dissolved in water and made up to 250.0 cm

^3 solution? (Relative atomic masses: H = 1.0, C = 12.0, O = 16.0, Na = 23.0)
A. 0.08 mol dm^-3
B. 0.11 mol dm^-3
C. 0.16 mol dm^-3
D. 0.22 mol dm^-3
Chemistry
1 answer:
disa [49]3 years ago
3 0

We have to know the molarity of solution obtained when 5.71 g of Na₂CO₃.10 H₂O is dissolved in water and made up to 250 cm³ solution.

The molarity of solution obtained when 5.71 g of sodium carbonate-10-water (Na₂CO₃.10 H₂O)  is dissolved in water and made up to 250.0 cm^3 solutionis: (A) 0.08 mol dm⁻³

The molarit y of solution means the number of moles of solute present in one litre of solution. Here solute is Na₂CO₃.10 H₂O and solvent is water. Volume of solution is 250 cm³.

Molar mass of Na₂CO₃.10 H₂O is 286 grams which means mass of one mole of Na₂CO₃.10 H₂O is 286 grams.

5.71 grams of Na₂CO₃.10 H₂O is equal to \frac{5.71}{286}= 0.0199 moles of Na₂CO₃.10 H₂O. So, 0.0199 moles of Na₂CO₃.10 H₂O present in 250 cm³ volume of solution.

Hence, number of moles of Na₂CO₃.10 H₂O present in one litre (equal to 1000 cm³) of solution is \frac{0.0199 X 1000}{250} = 0.0796 moles. So, the molarity of the solution is 0.0796 mol/dm³ ≅ 0.08 mol/dm³


You might be interested in
What Makes You Unique??<br> Just bored so yea :))) Free 15 points :)
Julli [10]

Answer:

you said 15 its 8 bruv

Explanation:

6 0
3 years ago
Read 2 more answers
What is the half life of an isotope that is 75% decayed after 16 days?
inna [77]

Answer:

half life will be 8days

5 0
3 years ago
If 25.0 g NO are produced, how many grams of nitrogen gas are used?
ivanzaharov [21]

Based on the assumption that the reaction involves N and O to produce NO, if 25.0 g of NO are produced, the amount of N gas used would be 11.66 grams

<h3>Stoichiometric calculation</h3>

From the equation of the reaction:

       N + O ---------> NO

Mole ratio of N to NO is 1:1

Mole of 25.0 g of NO = 25/30.01 = 0.833 moles

Equivalent mole of N = 0.833 moles

Mass of 0.833 moles N = 0.833 x 14 = 11.66 grams

More on stoichiometric calculations can be found here: brainly.com/question/8062886

7 0
2 years ago
Suppose you have a mixture of copper sulfate (CuSO4) and azulene (C10H8, you may wish to know the structure of azulene). Both co
iVinArrow [24]

Answer:

Aqueous layer (1 M HCI)

Explanation:

First of us I want to remind you of the cliché in chemistry that like dissolves like. In solvent extraction, a mixture is dissolved in a system consisting of two immiscible solvents. One layer is organic while the other layer is aqueous.

Polar substances partition in the aqueous layer while nonpolar substances partition in the organic layer.

Since Copper sulfate is ionic, we will find it in the aqueous layer according to the old chemistry cliche.

3 0
3 years ago
For which purpose do biochemists insert human genes into bacteria?
forsale [732]
Insertion of human genes into bacteria, also known as recombinant DNA technology, is used for the large scale production of human insulin, using bacteria as the insulin-producing machinery. The gene containing information for insulin production is inserted into the DNA of bacteria, which transcribe and translate it, and insulin is produced.
7 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following has a central atom that exceeds the octet rule? PCl5 BeF2 H2S CO2
    8·1 answer
  • Even if two cars perform the same amount of work, one car can still have more power.
    9·1 answer
  • Both pyrrole and pyridine are aromatic compounds, and undergo electrophilic aromatic substitution (EAS). Using a resonance argum
    11·1 answer
  • All of the following are units for pressure except _____. A. Pa B. psi C. atm D. Hg
    15·1 answer
  • The gases carbon dioxide, oxygen, and argon are mixed in a container. All gases have the same partial pressure, and the total pr
    10·1 answer
  • How many g of Fe2O3 will be produced from 132.7 g of o2
    15·1 answer
  • Sodium is more reactive than magnesium. Give reason ​
    8·2 answers
  • What is Earth's Axis and why is it important when we talk about the seasons?
    11·2 answers
  • How many atoms are in .938 moles of CO2?
    10·1 answer
  • Graphing is an important procedure used by scientist to display the data that is collected during a controlled experiment. There
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!