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
Leona [35]
3 years ago
8

An atom of 118Xe contains___ neutrons?A) 118 B) 54 C) 64 D) 172 E) 110​

Chemistry
1 answer:
aleksandrvk [35]3 years ago
4 0

Answer:

                      An atom of ¹¹⁸Xe contains 64 neutrons.

Explanation:

Number of Protons:

            The number of protons present in any atom are equal to the atomic number of that particular atom. Hence, as the atomic number of Xenon is 54 therefore, it contains 54 protons.

Number Neutrons:

            The number of neutrons present in atom are calculated as,

                              # of Neutrons  =  Atomic Mass - # of protons

As given,

                               Atomic Mass  =  118

                               # of Protons  =  54

So,

                               # of Neutrons  =  118 - 54

                               # of Neutrons  =  64

You might be interested in
What do scientists who study the human microbiome hope to achieve?
matrenka [14]

Answer:

Explanation:

Researchers hope to gain knowledge about how the microbiome contributes to health and disease states.

4 0
3 years ago
Read 2 more answers
Jay wants to know how the amount of acidity in rainwater influences the weathering rate of limestone.
creativ13 [48]
He can repeat his experiment multiple times, and ask a friend to repeat it as well to see if they get the same answer. 
3 0
3 years ago
Read 2 more answers
B. If the initial pressure of gas inside the balloon was 1.65 atm, what is the new pressure?
Orlov [11]

Question 1 :

V1/T1 = V2/T2

3.0L/273K = V2/373K

To get the value of Z, cross multiply

3.0L x 373K = 273K x V2

1119 = 273V2

Divide both sides by 273

1119/273 = 273V2/273

4.10L = V2

The new volume is 4.10 liters

Question 2 :

P1/T1 = P2 /T2

P1 = 880 kPA= 880 *10^3 Pa

T1 = 250 K

T2 = 303 K

P2 =?

Substituting for P2

P2 = P1 T2/ T1

P2 = 880 kPa * 303 / 250

P2 = 266,640 kPa/ 250

P2 = 1066.56 kPa.

The new pressure of the gas is 1066.56 kPa

Question 3 :

Given that:

Volume of gas V = 4.80L

(since 1 liter = 1dm3

4.80L = 4.80dm3)

Temperature T = 62°C

Convert Celsius to Kelvin

(62°C + 273 = 335K)

Pressure P = 2.9 atm

Number of moles of gas N = ?

Apply ideal gas equation

pV = nRT

2.9atm x 4.8dm3 = n x (0.0082 atm dm3 K-1 mol-1 x 335K)

13.92 atm dm3 = nx 2.747 atm dm3 mol-1

n = 13.92/2.747

n = 5.08 moles

There are 5.08 moles of gas contained in the sample

Question 4 :

Volume of gas V = 3.47L

(since 1 liter = 1dm3

3.47L = 3.47dm3)

Temperature T = 85.0°C

Convert Celsius to Kelvin

(85.0°C + 273 = 358K)

Pressure P = ?

Number of moles of gas N = 0.100 mole

Apply ideal gas equation

pV = nRT

p x 3.47dm3 = 0.10 x (0.0082 atm dm3 K-1 mol-1 x 358K)

p x 3.47dm3 = 0.29 atm dm3

p = (0.29 atm dm3 / 3.47 dm3)

p = 0.085 atm

If 1 atm = 760 mm Hg

0.085atm = 0.085 x 760

= 64.6 mm Hg

The pressure of the gas is 64.6 mm hg

8 0
2 years ago
1. What causes frost to form on the outside of a<br>cold container.​
Kamila [148]

Answer:

condensation

Explanation:

Frost forms when an outside surface cools past the dew point. The dew point is the point where the air gets so cold, the water vapor in the atmosphere turns into liquid. This liquid freezes. If it gets cold enough, little bits of ice, or frost, form

6 0
2 years ago
Explain the various modes of dispersal of seeds and fruits.​
11Alexandr11 [23.1K]
There are five main modes of seed dispersal: gravity, wind, ballistic, water, and by animals. Some plants are serotinous and only disperse their seeds in response to an environmental stimulus. Dispersal involves the letting go or detachment of a diaspore from the main parent plant.

Fruits and seeds dispersal is the process whereby fruits and seeds are scattered from their origin. The various ways by which fruit and seed are dispersed are known as agents of seed and fruit dispersal.

Check this link out for more information
https://qknowbooks.gitbooks.io/fruits-and-seeds/content/fruits_and_seeds_dispersal.html
4 0
3 years ago
Other questions:
  • Summarize how the solar system was devolved and what keeps it in place today
    11·1 answer
  • What does it mean for a sulution to be saturated?
    13·2 answers
  • Which element has the greatest density at STP? Ba, Be, Mg, or Ra?
    15·2 answers
  • Why is the sunshine at high pressure
    12·1 answer
  • Convert the given amount as noted.
    9·1 answer
  • A car traveling with a constant speed travels 150 km in 7200 s. What is the speed of the car?
    14·1 answer
  • What is the name of this molecule?
    5·1 answer
  • What is meant by "citing a source"?remembering where you found the materialnaming the source of the informationkeeping the note
    7·1 answer
  • What do the results tell you about your hypothesis(es)? How do the data support your claim above?
    7·1 answer
  • What are some damages for aftershocks
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!