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
alex41 [277]
3 years ago
6

Hola, podrían reseolverme estos problemas? Principalmente el último. Gracias 1. Al mezclar una disolución acuosa de CaCl2 con ot

ra de AgNO3 se forma un precipitado de cloruro de plata: Se mezcla un volumen de 15,0 ml de una disolución 0,30 M de CaCl2 con 30 ml de una disolución 0,05 M de AgNO3. Calcula los gramos de AgCl que precipitarán. 2. Determina el grado de pureza de un mármol (CaCO3) si al descomponerse 125 g del mismo se desprenden 20 litros de dióxido de carbono medidos a 15 ºC y 1 atm. 3. A partir de 120 g de KClO3 se obtuvieron a 18 ºC y a la presión de 740 mmHg, 20 L de oxígeno. ¿Cuál fue el rendimiento de la reacción? 4. Para la obtención de bromobenceno se hacen reaccionar 300 cm3 de benceno (d = 0,89 g/cm3) en exceso de bromo. Determina la masa de bromobenceno obtenido si el rendimiento de la reacción es del 65 %.
Chemistry
1 answer:
Aneli [31]3 years ago
5 0

Answer:

0.215 g AgCl produced.

Explanation:

First, the balanced chemical reaction must be written ,

2 AgNO₃ + CaCl₂ ⇒ 2 AgCl + Ca (NO₃) ₂.

- The next step is to calculate the amount of moles of the reagents , for this the molarity is multiplied by the volume in liters:

CaCl₂: 0.15 mol / L * 0.03 L = 0.0045 mol CaCl₂.

AgNO₃: 0.1 mol / L * 0.015 L = 0.0015 mol AgNO₃ .

- The next step is to identify the limiting reagent

For this, the moles of the reagents are divided by their stoichiometric coefficient of the balanced chemical reaction and the lowest value corresponds to the

limiting reagent: CaCl₂: 0.0045 / 1 = 0.0045

AgNO₃: 0.0015 / 2 = 0.00075  ⇒ Limiting reagent. 

- The next step is to determine the amount of moles that form from the precipitate, for this the stoichiometric coefficients are used , in this case we have that 2 moles of AgNO₃ produce 2 moles of AgCl, therefore:

0.0015 mol AgNO₃ * (2 mol AgCl / 2 mol AgNO₃) = 0.0015 mol AgCl.

- Finally, the grams are calculated using the molar mass of the AgCl:

0.0015 mol AgCl * (143.32 g / 1 mol)

= 0.215 g AgCl produced.

You might be interested in
Mass of One Water Molecule? The answer says the mass of one water molecule is 2.99 X 10^-23
zmey [24]
The mass of one mole of water it is 18 amu, but you need to find the mass of a molecule of water, therefore you calculate the mass of one mole of water, which is 18 amu and you divided by Avogadro's number which is 6,022 x 10^23. The result is 2,989 x 10^-23. Hope I helped you. If you have any questions ask :) Good luck.
6 0
3 years ago
What type of ion does the substance give off if it turns the pH paper blue?
olga_2 [115]

Answer:

Alkaline

Explanation:

In an alkaline solution, red litmus paper turns blue. When an alkaline compound dissolves in water, it produces hydroxide ions, which cause the solution to become alkaline.

5 0
3 years ago
Read 2 more answers
(1)List three things you know about<br> an atom? (2) What is matter created of?
kicyunya [14]

Answer:

Atoms consist of three basic particles: protons, electrons, and neutrons. The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).

Explanation:

8 0
2 years ago
How was or wasn't the scientific method followed in this experment
Andreas93 [3]

Answer:

The best answer would be:

C. The scientific method was followed because the experiment tested the hypothesis and produced reliable results.

Explanation:

The purpose of an experiment is to test the hypothesis. It is true that having an experimental group and a control group was following the scientific method but the data gathering and documentation was also part of the scientific method. So the best answer would be C.

Writing the question is not necessary. It is merely part of forming a hypothesis. The scientific method does not require many scientists to perform the experiment, but it does require that the experiment be repeatable, so it can be tested again.

3 0
3 years ago
What is the symmetry of n??
Aleks [24]

Answer:

n don't hv symmetry lines.

so the symmetry of n is 0

6 0
3 years ago
Other questions:
  • How many liters of 0.85 M HCI solution would react completely with 3.5 moles Ca (OH)2?
    5·1 answer
  • A 10.0 g sample of propane, C3H8, was combusted in a constant-volume bomb calorimeter. The total heat capacity of the bomb calor
    11·1 answer
  • How many liters of water are needed to make a 4.00 M solution using 75.0
    13·1 answer
  • What are the short-term and long -term consequences of climate change ? Draw evidence from research to support your analysis . C
    11·2 answers
  • In AgNo3+NaCl= NaNO3+AgCl how many moles of silver chloride are produced from 15.0 mil of silver nitrate
    15·1 answer
  • What is the CHARGE of the Sodium lon?​
    6·1 answer
  • Titration Lab Day 2 Data Sheet help?
    8·1 answer
  • This substance consists of two or more different elements chemically combined
    8·1 answer
  • Someone please come thru i need help with this quiz
    5·1 answer
  • Please identify each element associated with the orbital notation or electron configuration. Note: One “slash” is one electron,
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!