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
Zielflug [23.3K]
3 years ago
7

PLZ HELP *NO LINKS*

Chemistry
1 answer:
Radda [10]3 years ago
4 0

Answer: (1). There are  0.0165 moles of gaseous arsine (AsH3) occupy 0.372 L at STP.

(2). The density of gaseous arsine is 3.45 g/L.

Explanation:

1). At STP the pressure is 1 atm and temperature is 273.15 K. So, using the ideal gas equation number of moles are calculated as follows.

PV = nRT

where,

P = pressure

V = volume

n = number of moles

R = gas constant = 0.0821 L atm/mol K

T = temperature

Substitute the values into above formula as follows.

PV = nRT\\1 atm \times 0.372 L = n \times 0.0821 L atm/mol K \times 273.15 K\\n = 0.0165 mol

2). As number of moles are also equal to mass of a substance divided by its molar mass.

So, number of moles of Arsine (AsH_{3}) (molar mass = 77.95 g/mol) is as follows.

No. of moles = \frac{mass}{molar mass}\\0.0165 mol = \frac{mass}{77.95 g/mol}\\mass = 1.286 g

Density is the mass of substance divided by its volume. Hence, density of arsine is calculated as follows.

Density = \frac{mass}{volume}\\= \frac{1.286 g}{0.372 L}\\= 3.45 g/L

Thus, we can conclude that 0.0165 moles of gaseous arsine (AsH3) occupy 0.372 L at STP and the density of gaseous arsine is 3.45 g/L.

You might be interested in
What happens to an object's temperature if the kinetic energy of its particles decrease
ser-zykov [4K]
The temperature decreases
8 0
3 years ago
A children's liquid cold medicine has a specific gravity of 1.23. If a child is to take 1.5 tsp in a dose, what is the mass (in
julia-pushkina [17]

Assume 1 tsp is approximately can hold 5 mL liquid.

Given the dose of medicine = 1.5 tsp

Converting 1.5 tsp to mL:

1.5 tsp * \frac{5 mL}{1 tsp} = 7.5 mL

Given the specific gravity of the medicine = 1.23

That means density of the medicine with respect to water will be 1.23

As the density of water is 1 g/mL

We can take density of the medicine to be 1.23 g/mL

Calculating the mass of medicine in grams:

7.5 mL * \frac{1.23 g}{mL} =9.225 g

9.225 g medicine is present in one dose.

3 0
2 years ago
Read 2 more answers
19. Which organic molecule are steroids an example of?
Zarrin [17]
Steroids are lipids because they are hydrophobic and insoluble in water
6 0
2 years ago
Read 2 more answers
Aqueous solutions of potassium chloride and silver nitrate are mixed.
UkoKoshka [18]

Answer:

Sorry how no this equation guys

6 0
3 years ago
Need help calculating atomic mass (see pohoto for more info)
polet [3.4K]

Answer:

28.1

Explanation:

Divide the percentage abundances by 100:

92.2% ÷ 100 = 0.922

4.7% ÷ 100 = 0.047

3.1% ÷ 100 = 0.031

multiply them by their corresponding mass number:

0.922×28 = 25.816

0.047×29 = 1.363

0.031×30 = 0.93

add them all together to get your final answer:

25.816 + 1.363 + 0.93 = 28.109

to one decimal place:

28.1

I hope that helps!!!

5 0
2 years ago
Read 2 more answers
Other questions:
  • Which is most affected by a tropical warm air mass?
    13·2 answers
  • Which of the following is not a heterogeneous mixture?  a. concrete  b. pizza  c. sugar water  d. chicken soup
    8·1 answer
  • Sex cells from female reproductive organ?
    7·2 answers
  • Use electron configurations to account for the stability of the lanthanide ions Ce⁴⁺ and Eu²⁺.
    12·1 answer
  • Enthalpy change is the
    10·1 answer
  • Hey everyone!! Can someone please explain the periodic table of elements and whoever wants to talk I can talk to!!
    5·1 answer
  • Please help me immediately!!!
    14·1 answer
  • Take a close look at this diagram on the slide which form of government is represented by this diagram
    13·1 answer
  • Convert 355 km/s into m/ns.
    7·2 answers
  • How long does it take for magnesium citrate to work?.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!