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
Brilliant_brown [7]
3 years ago
15

Hello! I need a bit of help and Im kinda in a bit of a hurry so please help! Thank you :D

Chemistry
2 answers:
Scorpion4ik [409]3 years ago
8 0
The first one is substance 3
The second one is Oxygen, Helium, and carbon dioxide
The third one is the oil floats on top of the water
aalyn [17]3 years ago
8 0

Answer:

so for the first one it is the third one the second one it is carbon dioxide and for the third one,. Gasoline is an oil product. It floats and doesn't mix with water.

Explanation:

You might be interested in
How many atoms of gold are in gold nugget with a mass of 4.25 g
Feliz [49]
Number of Atoms in Gold for given mass can be calculated using following formula,

              # of Moles  =  Number of Atoms / 6.022 × 10²³
Or,
             Number of Atoms  =  Moles × 6.022 × 10²³     ------- (1)    

Calculating Moles,
As,
                              Moles  =  Mass / M.mass
So,
                              Moles  =  4.25 g / 196.96 g/mol

                              Moles  =  0.0215

Putting value of mole in eq.1,

             Number of Atoms  =  0.0215 × 6.022 × 10²³

             Number of Atoms  =  1.299 × 10²²

Result:
            4.25 g 
of Gold Nugget contains 1.299 × 10²² Atoms.
3 0
3 years ago
Read 2 more answers
A. Consider the following neutral electron configurations in which n has a constant value. Which configuration would belong to t
NeTakaya

Answer:

2s2 2p5

Rb < Sr< Sn< Te<I

Explanation:

Electron affinity is the ability of an atom to accept electrons to form negative ions.

Electron affinity is a periodic trend that decreases down the group but increases across the period.

This accounts for the trends observed in the answer. The atom having the electronic configuration, 2s2 2p5 must be a halogen and it exhibits the highest value of electron affinity.

Also, since electron affinity increases across the period, the electron affinities of the elements increases. Therefore, the arrangement of atoms as shown in the answer depends on increasing electron affinity.

6 0
3 years ago
What is the molarity of a 2.4-liter solution containing 124 grams of HF?
ioda
Molar mass:

HF = 1 + 19 = 20.0 g/mol

Number of moles :

124 / 20.0 =>  6.2 moles

Volume = 2.4 L

M = n / V

M = 6.2 / 2.4

M = 2.6 M

Answer A

hope this helps!

7 0
3 years ago
Read 2 more answers
PLS I NEED HELP give me examples of an atom
Ugo [173]

Answer:

Neon (Ne)

Hydrogen (H)

Argon (Ar)

Iron (Fe)

Calcium (Ca)

Deuterium, an isotope of hydrogen that has one proton and one neutron.

Plutonium (Pu)

F-, a fluorine anion.

Explanation:

I got u

4 0
3 years ago
One type of cat has the scientific name Felis domesticus, while another type of cat is called Felis tigris. What can be correctl
kykrilka [37]
A is the correct answer
3 0
3 years ago
Other questions:
  • How many seconds are in 5 hours
    6·2 answers
  • What does all flexible objects have in common
    12·1 answer
  • the problem say what is the volume (in kL) of 3.7505 x 10^4 mg of iron? Iron has a density of 7.87 g/ml. Use correct significant
    11·1 answer
  • Why do scientists look for patterns in the world?
    5·2 answers
  • Who discovered the nucleus by bombarding gold foil with positively charged particles and noting that some particales were widely
    15·1 answer
  • The specific heat capacity of silver is 0.235 J/g ∙ K. Its melting point is 962 °C, and its enthalpy of fusion is 11.3 kJ/mol. W
    13·1 answer
  • 2KI + Pb(NO3)2 → 2KNO3 + PbI2 Determine how many moles of KNO3 are created if 0.03 moles of KI are completely consumed.
    15·2 answers
  • Lucia wants to develop a process for dyeing shirts so that the color will not fade when the shirt is washed. She proceeds with t
    7·2 answers
  • Me ayudan xfa, doy corona :)
    7·1 answer
  • There are several different models that represent compounds. One type of model is shown.
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!