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
SashulF [63]
3 years ago
13

Which is not a formula for a diatomic molecule? N2 O3 He

Chemistry
2 answers:
Sergeu [11.5K]3 years ago
7 0
He because nitrogen and ozone is a molecule but helium is atom
frez [133]3 years ago
7 0

<u>Ans: Thus, O3 and He are not the formulas for diatomic. Only N2 is a diatomic</u>

A monatomic system consists of only a single element

A diatomic system consists of two elements

A polyatomic systems consists of more that two elements

1) N2: nitrogen molecule is composed of 2 N atoms. Hence it is a diatomic

2) O3: ozone is composed on 3 O atoms. Hence it is a triatomic (polyatomic)

3) He: Helium is  simply a monatomic

You might be interested in
A scientist is unsure about the accuracy of her experiment. She has checked her equipment and found it to be in good working ord
Shkiper50 [21]

Answer:

repeat the experiment

Explanation:

I am big brain. if she wants to know if it is correct, repeating the exact ay would show her if it is right or if she did something wrong

4 0
3 years ago
An isotope has a half-life of 10 minutes. after 20 minutes, what percentage of the original nuclei remain?
Elena-2011 [213]
To solve this, we can use two equations.
t1/2 = ln 2 / λ = 0.693 / λ  
   
where, t1/2 is half-life and λ is the decay constant.

t1/2 = 10 min = 0.693 / λ

Hence, λ = 0.693 / 10 min              -         (1)

Nt = Nο e∧(-λt)    
                
Nt = amount of atoms at t =t time
Nο= initial amount of atoms
t = time taken

by rearranging the equation,
Nt/Nο = e∧(-λt)                  -  (2)

From (1) and (2),

Nt/Nο = e∧(-(0.693 / 10 min) x 20 min) 
Nt/Nο = 0.2500

Percentage of remaining nuclei = (nuclei at t time / initial nuclei) x 100%
                                                     
= (Nt/Nο ) x 100%
                                                      = 0.2500 x 100%
                                                      = 25.00%

Hence, Percentage of remaining nuclei is 25.00%
6 0
2 years ago
Brainliest and a free hug :)
nlexa [21]

Answer:

C: The atoms involved in the chemical reaction

Explanation:

In a chemical reaction, when we balance it up, the number of moles or atoms on the left side must equal that on the right hand side. And thus, the mass is found in the atoms involved in such chemical reaction.

8 0
3 years ago
12 g of powdered magnesium oxide reacts with nitric acid to
galben [10]

Answer:

80.8 g

Explanation:

First, let's write a balanced equation of this reaction

MgO + 2HNO₃ → Mg(NO₃)₂ + H₂O

Now let's convert grams to moles

We gotta find the weight of MgO

24 + 16 = 40 g/mol

12/40 = 0.3 moles of MgO

We can use this to find out how much Magnesium Nitrate will be formed

0.3 x 1 MgO / 1 Mg(NO₃)₂ = 0.3 moles of Magnesium Nitrate formed

Convert moles to grams

Find the weight of Mg(NO₃)₂ but don't forget that 2 subscript acts as a multiplier of whatever is inside that parenthesis.

24 + 14 x 2 + 16 x 3 x 2 = 148 g/mol

148 x 0.3 = 80.8 g

4 0
3 years ago
10 moles of carbon dioxide has a mass of 440 g. What is the relative formula mass of carbon dioxide?
Ksenya-84 [330]

Answer: 44g

Explanation: The formular for finding Moles is ;

Moles =  Mass / Molar Mass or Formular Mass.

Base on this question; Moles = 10, Mass = 440g, and Formular Mass = ?

Making 'Formular Mass', subject of the formular; we thus have;

Formular mass = Mass / Moles = 440/ 10 = 44g

7 0
3 years ago
Other questions:
  • Would it be easier or more difficult (compared to zinc) to recover silver from solution? explain
    9·1 answer
  • A 5.0-gram sample of Fe(s) is to be placed in 100. milliliters of HCl(aq). Which changes will result in the fastest rate of reac
    6·1 answer
  • A solution has [OH-] of 1x10^-2, what is the pOH of this solution
    5·1 answer
  • How many grams of NaCl are in 0.78 moles of NaCl? *
    15·1 answer
  • (( ~ Please help me ~ ))
    13·1 answer
  • PLEASE HELP!!!!!!!!
    8·1 answer
  • How to test for ionic and covalent substances
    14·1 answer
  • Example: Sugar (C12H22O11) - Add up the masses of each element. (Look at your periodic table for the masses.)
    8·1 answer
  • When you throw a rock, you are ________ energy.
    7·1 answer
  • ELEMENTS ARE CLASSIFIED AS METALS, NONMETALS, AND METALLOIDS. USE THE PERIODIC TABLE AND IDENTIFY TWO OF EACH CLASSIFICATION.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!