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
frozen [14]
3 years ago
13

Which statement correctly describes an atom of the element helium

Chemistry
1 answer:
Assoli18 [71]3 years ago
5 0
Is this a multiple choice? Anyways I will just give you a written answer and hopefully it helps.

A: Helium is made up of two electrons held by electromagnetic force to two protons that are inside of a nucleus along with one or two neutrons.
You might be interested in
A gas sample is found to contain 39.10% carbon, 7.67% hydrogen, 26.11% oxygen, 16.82% phosphorus, and 10.30% fluorine. If the mo
Doss [256]

Answer:

C6H14O3F

Explanation:

The first step is to divide each compound by its molecular weight

Carbon

= 39.10/12

= 3.258

Hydrogen

= 7.67/1

= 7.67

Oxygen

= 26.11/16

= 1.63

Phosphorous

= 16.82/31

= 0.542

Flourine

= 10.30/19

= 0.542

The next step is to divide by the lowes value

3.258/0.542

= 6 mol of C

7.67/0.542

= 14 mol of H

1.63/0.542

= 3 mol of O

0.542/0.542

= 1 mol of P

0.542/0.542

= 1 mol of F

Hence the molecular formula is C6H14O3F

5 0
3 years ago
When should you<br> use a fume hood?
AfilCa [17]

Answer:

if you are working with hazardous materials.

Explanation:

A properly operating and correctly used fume hood can reduce or eliminate exposure to volatile liquids, dusts, and mists. It is advisable to use a laboratory hood when working with all hazardous substances.

4 0
4 years ago
Be able to describe the relationship between Freedom of Movement and phase change.
lisabon 2012 [21]

Ion knoe Wdym by “be able to describ’ so ima put it in my own words idr lol:)

if you talm bout some kentic energy or sum ok but other Dan dat ion knoe tbh

I can explain how transferring kinetic energy in and out of a substance can cause a change

7 0
3 years ago
Al + AgNO3 -&gt; Al(NO3)3 + Ag. As a balanced equation​
prisoha [69]

Answer:

Al + 4AgNO3 >>Al(NO3)3+ 3Ag

Explanation:

the number of moles of No3 of the products is 3 therefore we have to balance the reactants by adding 3 before the "AgNO3" which also leades us to adding 3 mols to Ag on the products side

4 0
3 years ago
Select the ion.<br><br>1)Cu<br>2)PO4-3<br>3)SO2
Lilit [14]
I believe the answer is B. PO4-3
6 0
4 years ago
Read 2 more answers
Other questions:
  • What factors should be taken into consideration when choosing the ideal solvent for the crystallization of a particular compound
    5·1 answer
  • If you don't no the answer for sure please don't answee
    10·2 answers
  • 10. Which of state of matter has no definite shape but does have a definite volume?
    6·1 answer
  • Use the mole concept to calculate the number of atoms that are in a 1.75-mol sample of CHCl3.
    5·1 answer
  • A screw is made up of
    14·1 answer
  • A. 2 pts: In terms of conservation of mass, what were the results of each experiment (which one conserved mass and which one did
    9·1 answer
  • Help plz I don’t get it
    13·2 answers
  • What is the volume, in liters, of a 0.2 M solution containing 8.5 grams of AgNO3?
    5·1 answer
  • Which of these are animal adaptations that help animals live in the deciduous forest biome? Select all that apply.
    12·1 answer
  • What are common materials​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!