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
ki77a [65]
3 years ago
15

What is the mass of 12.3 moles of helium (He)?

Chemistry
1 answer:
anzhelika [568]3 years ago
6 0

Answer : The mass of 12.3 moles of helium (He) is, 49.2 grams.

Solution : Given,

Moles of helium = 12.3 moles

Molar mass of helium = 4 g/mole

Formula used :

\text{Mass of helium}=\text{Moles of helium}\times \text{Molar mass of helium}

\text{Mass of helium}=(12.3mole)\times (4g/mole)=49.2g

Therefore, the mass of 12.3 moles of helium (He) is, 49.2 grams.

You might be interested in
Because they have aromas, compounds with a ring of resonance bonds are called –
Shalnov [3]

Answer:

the answer is Fragrent compounds

6 0
3 years ago
The Haber-Bosch process operates at reaction pressures of 200.0
kiruha [24]
<h3>Haber - Bosch process, method of directly synthesizing ammonia from hydrogen... The reaction is carried out at pressure ranging from 200 to 400 atmosphere's</h3>

sana maka tulong ❣️

8 0
2 years ago
A student will measure and record the growth of two flowering plants every day for 28 days. Plant A will be watered and fertiliz
mestny [16]
The conclusion that would support the students prediction is B) Plant "A" grows taller than Plant "B".
If the student thinks that adding fertilizer to the plant would help it grow then answer B) would make the most sence.
5 0
3 years ago
Read 2 more answers
Name the Scientist
IRISSAK [1]

Answer:

A. Ernest Rutherford

B.Bohr

C. Eugen Goldstein

D.. Santiago Ramon y cajal

E.john Dalton

F.isobars - a line drawn on a weather map connecting points of equal pressure is called isobars.

example.. argon 40

potassium 40

.two differences between isobars and isotopes.

isobars are those elements which have different atomic number but the same mass number. while isotopes are those elements having the same atomic number and different mass number..

two uses of isotopes.

uranium 235 - for nuclear fission and as fuel in unclear reactors.

# an isotope cobalt - used In the treatment for cancer

# an isotope iodine - used in treatment of goiter.

7 0
3 years ago
The energy needed to remove an electron from an atom is called
Arlecino [84]

Ionization energy, also called ionization potential, in chemistry, the amount of energy required to remove an electron from an isolated atom or molecule

3 0
3 years ago
Other questions:
  • In a laboratory 0.500 moles of NAOH is completely dissolved in distilled water to form 400.0 mL of NAOH. The solution is then us
    11·2 answers
  • Animals have internal stimuli or cues that help them survive. Which stimuli is external rather than internal?
    7·1 answer
  • At 570. mm Hg and 25°C, a gas sample ne (in mm Hg) at a volume of 1250 mL and a temperature of 175°C and 25°C, a gas sample has
    7·1 answer
  • According to the equation below, how many moles of Ca(OH)2 are required to react with 1.36 mol H3PO4 to produce Ca3(PO4)2? 3Ca(O
    10·1 answer
  • Match the element with its number of valence electrons. Column A 1. Boron : Boron 2. Carbon : Carbon 3. Fluorine : Fluorine 4. S
    13·1 answer
  • What is the correct name for ionic compound Cs2S?
    6·1 answer
  • How does water’s high specific heat capacity affect large lakes?
    15·1 answer
  • What's a beaker with a hole in it where a tube can be inserted to be connected to another beaker called?
    5·1 answer
  • When the first ball in a Newton's cradle is pulled back and released, it causes the final ball to move. What does this example o
    10·1 answer
  • At room temperature iodine is a solid and bromine is a liquid.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!