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
Ghella [55]
3 years ago
10

Potassium cyanide is a toxic substance, and the median lethal dose depends on the mass of the person or animal that ingests it.

The median lethal dose of KCN for a person weighing 135 lb (61.2 kg ) is 5.74×10−3 mol . What volume of a 0.0640 M KCN solution contains 5.74×10−3 mol of KCN? Express the volume to three significant figures and include the appropriate units.
Chemistry
1 answer:
kakasveta [241]3 years ago
6 0

Answer:

The volume will be 89.6875 ml

Explanation:

So to count this we will use a single proportion.

0.0640 mol - 1000 ml

5.74×10−3 mol - x ml

x ml=5.74×10−3 mol*1000 ml/0.0640 mol=89.6875 ml

You might be interested in
Barium and lead both produce yellow precipitate with the chromate ion as part of their confirmation tests. if you had a sample t
UkoKoshka [18]
Barium is an element that is primarily used in fireworks because of its distinct green colour while on the other hand, lead is used in electrical industries due to its unique properties. The ions of these elements can simply be identified when its insoluble salts get precipitated by any process.
5 0
3 years ago
Read 2 more answers
How many nitrogen atoms are in 2.79 mo.of NH3
alexandr1967 [171]
1 mol of any particles has 6.02 * 10 ²³ particles.

If we look at 1 NH3 (1 mol NH3 or 1 molecule NH3), we can see that 1 molecule NH3 has 1 atom of N and 3 atoms of H; also 1 mole of NH3 has 1 mole of N atoms and 3 moles of H atoms.

So, 1 mol of NH3 has 1 mol of N atoms,
 and 2.79 mol NH3 have 2.79 mol of N atoms.

2.79 mol of N atoms* 6.02 * 10 ²³ N atoms/ 1 mol N atoms = 1.68*10²⁴ N-atoms 

 Answer is 1.68*10²⁴ N-atoms. 
5 0
3 years ago
Which of the following is the correct formula for Ca2+ reacting with NO2??
mariarad [96]

Answer:

B. Ca(NO2)2

Explanation:

Ions (charged atoms) combine with one another to form stable ionic compounds. In this case, calicium ion (Ca2+) is said to react with NO2, which has a charge of -1 i.e. +1-1(2) = 1-2 = -1.

This means that calcium has a charge of +2 while nitrite ion has charge of -1, hence, when they combine, they exchange their charges, which become their subscript as follows:

Ca2+ + NO2- → Ca(NO2)2

Ca(NO2)2 is a stable ionic compound called calcium nitrite. Notice that it takes two atoms of NO2- to react with one atom of Ca2+.

5 0
3 years ago
2. What is the mass of 16.3 L of helium gas?
lilavasa [31]

(16.3 L) / (22.414 L/mol) x (4.0026 g He/mol) = 2.91 g

3 0
3 years ago
Read 2 more answers
How many mL of a stock solution of 2.00 M KNO3 are needed to prepare 100.0 mL of 0.15M KNO3? with work plz
Tatiana [17]
Using the law of dilution :

Mi x Vi =  Mf x Vf

2.00 x Vi = 0.15 x 100.0

2.00 x Vi = 15

Vi = 15 / 2.00

Vi = 7.5 mL

hope this helps!


3 0
3 years ago
Other questions:
  • 1. Concentrated HCl is 11.7M. What is the
    7·1 answer
  • What is the electron configuration of the iodide ion?
    12·1 answer
  • What is the final product of the following sequence of reactions? A. A B. B C. C D. D 21. Which of the following reacts the fast
    15·1 answer
  • Addition of dns at the end of the incubation period stopped the reaction by denaturing sucrase. explain why it is important to d
    15·2 answers
  • When energy is transferred to alr, what happens to the particles of alr?
    7·1 answer
  • Is the speed on this graph increasing or constant?
    12·2 answers
  • State the purpose of respiration.​
    6·2 answers
  • What is the reactants start for H2 + O2 --> H2O
    5·2 answers
  • If a scientist wants to make molecules move slower, what should they do? A. decrease their kinetic energy B. Transfer energy out
    15·2 answers
  • What is two masses exerting a force on each other an example of?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!