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
11111nata11111 [884]
3 years ago
10

How many Helium atoms are in 12 grams of Helium?

Chemistry
1 answer:
horsena [70]3 years ago
6 0
12gHe/1 × 1molHe/4.0026g × 6.02x10^23atomHe/1mol = 1.8 atoms
You might be interested in
2. A chemical analysis of a sample provides the following elemental data:
Vadim26 [7]

Answer:

C3 H6 O2

Explanation:

first divide their mass by their respective molar mass, we get:

30.4 moles of C

61.2 moles of H

20.25 moles of O

now divide everyone by the smallest one of them then we get

C= 1.5

H= 3

O= 1

since our answer of C is not near to any whole number so we will multiply all of them by 2

so,

C3 H6 O2 is our answer

3 0
1 year ago
Which statement is true?
mihalych1998 [28]
B. Most rocks are composed of single mineral
3 0
2 years ago
Read 2 more answers
Water is a pure substance. Which of the following is true about water? (4 points) Its compounds can only be physically separated
jonny [76]

Answer:

Water/H20 is a compound made of hydrogen and oxygen. Although water is the most abundant substance on earth, it is rarely found naturally in its pure form. Most of the time, pure water has to be created. Pure water is called distilled water or deionized water.

Explanation:

7 0
2 years ago
HELP!<br> Which of the following fossils is an example of permineralization?
UNO [17]

Answer:

Examples of permineralization

Most dinosaur bones are permineralized. Petrified wood: Permineralization is the first step in petrification.

7 0
3 years ago
Read 2 more answers
2.What are variables used to describe weather?
Studentka2010 [4]
The answer is, All of the above
4 0
2 years ago
Other questions:
  • A certain pressure of n2o4 is initially added to an otherwise evacuated rigid vessel. at equilibrium, 25.8% of n2o4 remains. det
    7·1 answer
  • Which is a quantitative observation A. 15 m long B. red color C. rough texture D. strong odor
    13·1 answer
  • For each (P, V) pair, type the pressure in the x-column and the volume in the y-column. Then click “Resize window to fit data.”
    9·1 answer
  • A scientist has tested an experimental drug on laboratory mice and created a model. Which of the following is the next logical s
    13·1 answer
  • Could the other molecules in this simulation (argon, oxygen, and water) be considered pure substances? Explain your thinking.
    14·1 answer
  • Give the clarification of heat and temperature on the basis of molecular motion?
    8·1 answer
  • I need help with this pls
    14·1 answer
  • What neutral element has 17 electrons an 18 neutrons?
    5·2 answers
  • I need help with science pls​
    6·1 answer
  • A sample of rock contains 80 grams of a parent radioactive isotope that has a half-life of 20 000 years. After 100 000 years, th
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!