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
irinina [24]
3 years ago
12

How many moles of helium atoms are there in

Chemistry
1 answer:
fredd [130]3 years ago
6 0

a is the correct answer .

2.4 × 10^24

You might be interested in
This planet is about the size of Earth. It has a very thick atmosphere with
emmainna [20.7K]

Answer:

Venus

Explanation:

Mars has a thin atmosphere

Saturn is really cold (-288F)

Mercury has no atmosphere

4 0
2 years ago
Use the atomic mass of indium to calculate the relative abundance of indium-113.
ASHA 777 [7]

The relative abundance of indium-113 is 4%.

The isotopes are species of the same element having the same atomic number but a different mass number.

The elements occurring in nature exist as multiple isotopes.

When we take into account the existence of these isotopes and their relative abundance (percent), the average atomic mass of that element can be computed, which is given by the following formula,

Average atomic Mass= (%age of isotope 1) x (Mass of isotope 1) + (%age of isotope 2) x (Mass of isotope 2)/100

Indium exists in the form of Indium-113 and Indium-115.

The mass of Indium-113 is 112.90 u.

The mass of Indium-115 is 114.90 u.

The average atomic mass of Indium is 114.82 u.

Let the %age of isotope 1(Indium-113) be X.

Then, the %age of isotope 2(Indium-115) would be 100-X.

Applying the values in the formula,

Average atomic mass = 112.90X+114.90(100-X)

114.82 = 112.90X+114.90(100-X)

On solving the above equation, the value of X comes out to be 4%.

Thus, the relative abundance/%age abundance of Indium-113 is 4%.

To know more about "Average Atomic Mass", refer to the following link:

brainly.com/question/13753702?referrer=searchResults

#SPJ4

7 0
1 year ago
How many bromine atoms are present in 39.4 g of CH2Br2
strojnjashka [21]
37.8 g CH2Br2 X (1 mol CH2Br2 / 173.83 g) = 4.60X10^-3 mol CH2Br2 

<span>4.60X10^-3 mol CH2Br2 X (2 mol Br / 1 mol CH2Br2) X 6.02X10^23 atoms/mol = 5.54X10^21 bromine atoms</span>
7 0
3 years ago
What is the formula for germicide that is sufficient to kill blood-borne pathogens?
Colt1911 [192]
It is 1 ounce. Bloodborne Pathogens can be transmitted when blood or body liquid from a tainted individual enters someone else's body by means of needle-sticks, human chomps, cuts, scraped areas, or through mucous films. Likewise, semen, vaginal discharges and salivation in dental methods are considered conceivably tainted body liquids.
7 0
2 years ago
Mention the four characterstics of warm blooded animals.<br>​
Igoryamba

Answer:

The four characrteristics of warm blooded animals are÷

Explanation:

i=They can keep its body temperature the same no matter what the outside temperature .

ii=They can maintain a constant body temperature.

iii=They obtain energy from food consumption.

iv=They maintain their body temperature higher than environment.

7 0
2 years ago
Read 2 more answers
Other questions:
  • The most common fuel for nuclear fission reactors is:
    12·2 answers
  • How can you tell if a chemical reaction has occurred?
    8·1 answer
  • AM TWELVE AND A BOY TELL ME YOUR AGE AND IF YOUR SINGLE AND MY AGE WE CAN DATE<br> :)
    8·2 answers
  • How many individual orbitals does carbon use for all of its electrons? Remember, there are two electrons in each filled orbital
    11·1 answer
  • Label the respiratory system.<br> I’ll mark Brainliest! if y’all help with all of them!!
    15·1 answer
  • Pick the TWO conversions which are exact.
    15·2 answers
  • Calculate the number of vacancies in gold per cubic centimeter at 1000 K, where the density and atomic weight for gold at are 18
    7·1 answer
  • Simple distillation experiment lab report
    10·1 answer
  • how does the involvement of energy in a decomposition reaction compare to how energy is involved in a combustion reaction?
    11·1 answer
  • True or false and object can not be accelerating if it has constant speed
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!