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
Zigmanuir [339]
3 years ago
5

The average atomic mass of ga is 69.72 amu. Calculate the abundance of each isotope.

Chemistry
1 answer:
ziro4ka [17]3 years ago
6 0

Answer:

Abundance of Ga 70.925 is 0.399 and percentage abundance of Ga 39.9%

Abundance of Ga 68.926 is 0.601 and percentage abundance is 60.1 %.

Explanation:

we know there are two naturally occurring isotopes of gallium Ga 68.926 and Ga 70.925.

First of all we will set the fraction for both isotopes

X for the isotopes having mass 70.925

1-x for isotopes having mass 68.926

The average atomic mass of Ga is 69.72.

we will use the following equation,

70.925 x + 68.926 (1-x) = 69.72

70.925 x + 68.926 - 68.926x = 69.72

70.925x- 68.926x = 69.72 - 68.926

1.99 x = 0.794

x= 0.794/ 1.99

x= 0.399

abundance of Ga 70.925 is 0.399, because we solve the fraction x.

0.399 × 100 = 39.9 %

39.9 % is percentage abundance of Ga 70.925

now we will calculate the abundance of Ga 68.926.

(1-x)

1 - 0.399 = 0.601

abundance of Ga 68.926 is 0.601 and percentage abundance is

0.601 × 100= 60.1 %

You might be interested in
Which of the following is generally true of female bones in relationship to male bones?
gtnhenbr [62]
What are the options
6 0
3 years ago
What is subshell and why do we use it if we have main shells already
kumpel [21]
Principal shell shows the main energy level, in that there are some more energy levels. This is how the atomic structure is defined according to the Quantum Mechanical model of atom. So exactly why do subshells exist and all i don't know
5 0
3 years ago
How many mL will a 0.205 mole sample of He occupy at 3.00 atm and 200 K? Report your answer to the nearest mL.
Tcecarenko [31]

1.1214 mL will a 0.205-mole sample of He occupy at 3.00 atm and 200 K.

<h3>What is an ideal gas equation?</h3>

The ideal gas law (PV = nRT) relates the macroscopic properties of ideal gases. An ideal gas is a gas in which the particles (a) do not attract or repel one another and (b) take up no space (have no volume).

Using equation PV=nRT, where n is the moles and R is the gas constant. Then divide the given mass by the number of moles to get molar mass.

Given data:

P= 3.00 atm

V= ?

n=0.205 mole

R= 0.082057338 \;L \;atm \;K^{-1}mol^{-1}

T=200 K

Putting value in the given equation:

\frac{nRT}{P} =V

V= \frac{0.205 \;mole\;0.082057338 \;L \;atm \;K^{-1}mol^{-1} X 200}{3 \;atm}

V= 1.1214 mL

Learn more about the ideal gas here:

brainly.com/question/27691721

#SPJ1

4 0
2 years ago
An Argon laser gives off pulses of green light (wavelength = 514 nm). If a single pulse from the laser has a total energy of 10.
svetoff [14.1K]

Answer:

n=2.59\times 10^{16} photons

Explanation:

E=n\times \frac{h\times c}{\lambda}

Where,  

n is the number of photons

h is Plank's constant having value 6.626\times 10^{-34}\ Js

c is the speed of light having value 3\times 10^8\ m/s

\lambda is the wavelength of the light

Given that, wavelength = 514 nm = 514\times 10^{-9}\ m

Energy = 10.0 mJ = 0.01 J ( 1 mJ = 0.001 J )

Applying the values as:-

0.01=n\times \frac{6.626\times 10^{-34}\times 3\times 10^8}{514\times 10^{-9}}

\frac{19.878n}{10^{17}\times \:514}=0.01

n=2.59\times 10^{16} photons

7 0
3 years ago
PLEASE ANSWER ASAP FOR 50 POINTS (scroll down to see the pictures for the questions)
sladkih [1.3K]
Absorption occurs when photons from incident light hit atoms and molecules and cause them to vibrate. The more an object's molecules move and vibrate, the hotter it becomes. This heat is then emitted from the object as thermal energy.
8 0
2 years ago
Read 2 more answers
Other questions:
  • All of the following are true regarding alcoholic fermentation, except that alcoholic fermentation
    10·1 answer
  • Is kp or kc larger (both at 300 k) for the reaction 2 nh3(g) ⇀↽ n2(g) + 3 h2(g) ? 1. they are both the same. 2. kc is larger. 3.
    9·1 answer
  • Insulin is a protein that is used by the body to regulate both carbohydrate and fat metabolism. a bottle contains 425 ml of insu
    15·1 answer
  • What are all of the elements that end with F electrons
    12·1 answer
  • 2. Report each of the following quantities to 3 significant figures. Use standard notation if possible, or
    12·1 answer
  • Determine the mass in grams of 4.69 x 1021 atoms of barium. (The
    14·1 answer
  • Can someone please help me?
    7·2 answers
  • Calculate the weight of 5 atoms of Mg.​
    9·1 answer
  • The substance chlorine monoxide, ClO(g), is important in atmospheric processes that lead to the depletion of the ozone layer. Th
    10·1 answer
  • 30 treadmills to 36 elliptical machines
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!