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
kirza4 [7]
3 years ago
5

A 3.2-gram sample of air contains 0.000 74 gram of hydrogen cyanide. Determine the concentration, in parts per million, of the h

ydrogen cyanide in this sample.
Chemistry
1 answer:
notka56 [123]3 years ago
7 0
 The answer is: 231.25 ppm. 
To solve this, compute first the percentage of hydrogen in the 3.2 g air sample. % = (0.00074g/3.2g)*100 = 0.023125%
1% = 10,000ppm <--- use this as conversion factor. 

0.023125%(10,000ppm/1%) = 231.25 ppm 
You might be interested in
Purification of nickel can be achieved by electrorefining nickel from an impure nickel anode onto a pure nickel cathode in an el
Alexxandr [17]

Answer: 530 hours

Explanation:

The reduction of Nickel ions to nickel is shown as:

Ni^{2+}+2e^-\rightarrow Ni

96500\times 2=193000Coloumb of electricity deposits 1 mole of Nickel

1 mole of Nickel weighs = 58.7 g

Given quantity = 18.0 kg = 18000 g  (1kg=1000g)

58.7 g of Nickel is deposited by 193000 C of electricity

18000 g of Nickel is deposited by = \frac{193000}{58.7}\times 18000=59182282.8C of electricity

Q=I\times t

where Q= quantity of electricity in coloumbs  = 59182282.8C

I = current in amperes = 31.0 A

t= time in seconds = ?

59182282.8C=31.0A\times t

t=1909105.9sec

(1h=3600 sec)

t=530hours

Thus 530 hours are required to plate 18.0 kg of nickel onto the cathode if the current passed through the cell is held constant at 31.0 A

3 0
3 years ago
How did modern scientists experiment with Van Goghs paints to determine their chemical reactions?
Vlada [557]

Answer:

the would test random expirements

7 0
3 years ago
Atoms in 1 mol of carbon dioxide
astra-53 [7]
1 carbon and 2 oxygen atoms CO2
8 0
3 years ago
A sample of sulfur hexafluoride gas occupies a volume of 9.10 L at 198ÁC. Assuming that the pressure remains constant, what temp
alexandr1967 [171]
  As we know that
<span>V1/T1 = V2/T2 
V1 = 9.10 L 
T1 = 471 K 
V2 = 2.50 L 
T2 = 2.5 x 471 / 9.10 = 129.3 K 
T2 = 129.3 - 273 =
 -143.6 deg Celsiu
hope it helps</span>
5 0
3 years ago
Read 2 more answers
3. 2KOH + H2SO4 = K2SO4 + 2H2O what chemical reaction is it.
Serjik [45]
From what is given, double replacement is what it is
5 0
2 years ago
Other questions:
  • What is the molar mass of (NH4)2O? Explain how you calculated this value.
    14·1 answer
  • Why did early astronomers believe in the geocentric model?
    14·2 answers
  • How many ml of a .4 % solution of nalorphine must be injected to obtain a dose of 1.5 mg
    9·1 answer
  • The atoms of a solid aluminum can are close together, vibrating in a rigid structure. if the can is warmed up on a hot plate,
    7·1 answer
  • 20points
    10·2 answers
  • What is the geometry name for PF5? Is PF5 polar or non-polar?
    8·1 answer
  • How many grams of carbon are there in 706 grams of acetic acid
    11·1 answer
  • True or false and object can not be accelerating if it has constant speed
    7·1 answer
  • Convert 4.92 L of hydrogen at STP to moles.
    15·2 answers
  • A specialist that study substance obtained by attained mining is called a what​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!