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
stepladder [879]
2 years ago
15

How many grams of water are needed to dissolve 27.8 g of ammonium nitrate NH4NO3 in order to prepare a 0.452 m solution?

Chemistry
1 answer:
Vanyuwa [196]2 years ago
5 0

Answer: 770 g water are needed to dissolve 27.8 g of ammonium nitrate NH_4NO_3 in order to prepare a 0.452 m solution

Explanation:

Molality : It is defined as the number of moles of solute present per kg of solvent

Formula used :

Molality=\frac{n\times 1000}{W_s}

where,

n= moles of solute

Moles of NH_4NO_3=\frac{\text{Given mass}}{\text{Molar mass}}=\frac{27.8g}{80.0g/mol}=0.348moles  

W_s = weight of the solvent in g = ?

0.452=\frac{0.348\times 1000}{W_s}

W_s=770g

Thus 770 g water are needed to dissolve 27.8 g of ammonium nitrate NH_4NO_3 in order to prepare a 0.452 m solution

You might be interested in
PLEASE HELP ME OUT. I AM REALLY LOST AND I JUST NEED THIS LAST QUESTION I WILL BE GRATEFUL AND WILL GIVE BRANLIEST!
sashaice [31]

Explanation:

—COOH and —NH₂

Carboxylic Acid and Amino

3 0
2 years ago
Which of th following is true for a parallel circuit
emmainna [20.7K]

Answer:

  • <u><em>B. The voltage is the same across all resistors in the circuit.</em></u>

<u><em></em></u>

Explanation:

The answer choices are:

  • A.The current is the same across all resistors in the circuit.
  • B.The voltage is the same across all resistors in the circuit.
  • C. As more resistors are added, the current will decrease.
  • D. The sum of the voltage drops will equal the total voltage.

<h2>Solution</h2>

In a simple <em>parallel circuit</em>, each component (resistor) is connected directly to the battery forming different branches or pathways to the current.

Thus, the ends of each resistor receives the total potential difference or <em>voltage</em> from the battery, which is what the <em>statement B</em>. asserts. Hence, <em>statement B is true</em>.

On the other hand, the current will split among the different pathways, following Ohm's law: the greater the resistance of the resistor the lower the current. Thus, the <em>statement A is false</em>.

For a parallel circuit, the total resistance decreases as more resistors are added, which means that, again following Ohm's law, the current will increase, contradicting the statement C. Thus, the <em>statement C is false. </em>

It is in the series circuit that 'the sum of the voltage drops will equal the total voltage"; in a parallel circuit the voltage drop is the just one and the same for each resistor. Thus, the <em>statement D is false,</em>too.

8 0
2 years ago
Which is one way that scientists ensure that data is reliable?
docker41 [41]

Answer:

letter b by replicating experiments

Explanation:

8 0
1 year ago
What is elastic energy ​
aleksley [76]

Answer:

Explanation:\

Elastic energy is energy stored in an object when there is a temporary strain on it – like in a coiled spring or a stretched elastic band.

The energy is stored in the bonds between atoms. The bonds absorb energy as they are put under stress and release the energy as they relax (when the object returns to its original shape).

8 0
3 years ago
Read 2 more answers
Which property of metals allows aluminum to be flattened into thin sheets of aluminum foil?
Gnoma [55]

Answer:

malleability

Explanation:

3 0
3 years ago
Other questions:
  • At STP, which 2.0-gram sample of matter uniformly fills a 340-milliliter closed container?
    14·1 answer
  • As the atoms of the Group 17 elements in the ground state are considered from top to bottom, each successive element has
    5·2 answers
  • A decomposition occurs when you open a can or bottle of soda. Carbonic acid, H2CO3, is in carbonated beverages. It decomposes in
    10·2 answers
  • In the film, Lavoisier said that the mass gained by the pipe plus the mass of the collected gas "exactly" equaled the lost mass
    8·1 answer
  • Need help with chemistry
    8·2 answers
  • Please help with all 3 parts!
    9·2 answers
  • ☆Only need information for problem 3 but you need to know the information from problem 2 to get answer 3☆
    11·1 answer
  • Huh? This is confusing 30 pointsssssss
    9·1 answer
  • How many atoms are in 1g of Hg
    7·2 answers
  • Who is the atom from the other end of town?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!