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
snow_lady [41]
3 years ago
12

A solution contains 225 g of sodium chloride, NaCl, dissolved in enough water to make a 0.25 L of solution. What is the molarity

of the solution?
A. 3.88 M, B. 1.03 M, C. 1.5 M, D. 15.5 M
Chemistry
1 answer:
insens350 [35]3 years ago
3 0

Answer: The correct answer is option D.

Explanation:

Mass of the NaCl = 225 g

Volume of the solution ,V = 0.25 L

Molarity=\frac{\text{Mass of the NaCl}}{\text{Molar mass of the NaCl}\times V(L)}=\frac{225 g}{58.44 g/mol\times 0.25 L}=15.4004 mol/L

15.4004 mol/L is the molarity of the solution. The most closest option to our answer is option D.

You might be interested in
The iron content of foods can be determined by dissolving them in acid (forming Fe3+), reducing the iron(III) to iron(II), and t
____ [38]

Answer:

  • <em>Oxidation half-reaction</em>:

Fe²⁺(aq) →  Fe³⁺(aq) + 1e⁻

  • <em>Reduction half-reaction</em>:

Ce⁴⁺(aq) + 1e⁻ →  Ce³⁺(aq)

Explanation:

The reaction that takes place is:

  • Fe²⁺(aq) + Ce⁴⁺(aq) → Fe³⁺(aq) + Ce³⁺(aq)

The <em>oxidation half-reaction</em> is:

  • Fe²⁺(aq) →  Fe³⁺(aq) + 1e⁻

It is an oxidation because the oxidation state of Fe increases from 2+ to 3+.

The <em>reduction half-reaction</em> is:

  • Ce⁴⁺(aq) + 1e⁻ →  Ce³⁺(aq)

It is a reduction because the oxidation state of Ce decreases from 4+ to 3+.

4 0
3 years ago
Given a 1.50 Liters of solution that contains 62.5 grams of magnesium oxide. What is the Molarity of that solution? Please show
zhenek [66]
Given:
1.50 L
62.5 grams
and the MM of MgO: 40.31 g/mol

Molarity: mol/L

First, find mol.

62.5 g x 1mole ÷ 40.31 g = 1.55 mol

then divide mol and the given liters

1.55mol ÷ 1.50 L= 1.03 M
3 0
3 years ago
Suppose a snack bar is burned in a calorimeter and heats 2,000 g water by 20 °C. How much heat energy was released?
prohojiy [21]

Heat energy released : 167.2 kJ

<h3>Further explanation</h3>

Heat can be calculated using the formula:  

Q = mc∆T  

Q = heat, J  

m = mass, g  

c = specific heat, joules / g ° C  

∆T = temperature difference, ° C / K  

m = 2000 g

c = 4.18  J/ g ° C  

∆t = 20 ° C  

\tt Q=2000\times 4.18\times 20\\\\Q=167200~J=167.2~kJ

7 0
3 years ago
In an ideal gas, collisions between molecules ________.
marta [7]

Answer:

D. All of the Above

Explanation:

4 0
2 years ago
True or false? For the reaction represented by the balanced chemical equation
Mashcka [7]

Answer:

False.

Explanation:

From the balanced equation, 1 mole of  Mg(OH)2 reacts with 2 moles of HCl.

So for 0.40 moles of  Mg(OH)2 we need 2*0.4 = 0.80 moles of HCl.

8 0
3 years ago
Other questions:
  • What holds combinations of atoms together in molecules? protons and electrons atomic magnetism chemical bonds nuclear forces?
    15·2 answers
  • Which element in each of the following sets would you expect to have the lowest IE₃?
    12·2 answers
  • 80.0 liters of oxygen gas is collected over water at 50 degrees celcius. the atomsphereic pressure in the room is 96.00 kPA. wha
    14·1 answer
  • Find the volume of 56.0 grams of O2
    14·1 answer
  • Answers please :) i highly need them
    10·1 answer
  • What type of organic compounds are sugars and starches?
    7·2 answers
  • Some people believe that the Moon’s phases are caused by Earth’s shadows on the Moon. Is this true? Use your model to explain.
    8·1 answer
  • Determine the number of protons neutrons and electrons in 3216s2
    6·1 answer
  • TIMED HELP ASAP
    6·1 answer
  • How many grams of KOH are required to prepare 500. mL of 0.450 KOH solution?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!