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
Mariana [72]
3 years ago
8

For each pair below, select the sample that contains the largest number of moles. Pair A 2.50 g O2 2.50 g N2

Chemistry
2 answers:
wel3 years ago
8 0

Answer:

Pair A : 2.50 g N2    Pair B : 21.5 g n2    Pair C : 0.081 CO2

Explanation:

raketka [301]3 years ago
4 0

Answer:

Explanation:

Pair  2.50g of O₂ and 2.50g of  N₂

The atoms sample with the largest number of moles since the masses are the same would be the one with lowest molar mass according the the equation below:

Number of moles = \frac{mass }{molarmass}

Atomic mass of O = 16g and N = 14g

Molar mass of O₂ = 16 x 2 = 32gmol⁻¹

Molar mass of N₂ = 14 x 2 = 28gmol⁻¹

Number of moles of O₂ = \frac{2.5}{32} = 0.078mole

Number of moles of N₂ = \frac{2.5}{28} =  0.089mole

We see that N₂ has the largest number of moles

You might be interested in
Ito Ang naimbento ni graham bell na nagpabilis sa pakikupagtalastasan​
Feliz [49]

Answer:

ФОТОГРОФИРУЙ

ИЛИ НАПИШИ

В КОМЕНТЫ

7 0
2 years ago
Which events represents a chemical change ?
8_murik_8 [283]
D milk turning sour 
the other options are physical changes
5 0
2 years ago
Read 2 more answers
During science class, students were given a beaker containing warm water. They added one package of dry baker's yeast and some s
vlabodo [156]
B.

they should probably observe their
7 0
2 years ago
Assuming 100% dissociation, calculate the freezing point and boiling point of 1.22 m SnCl₄(aq). Constants may be found here.
Gekata [30.6K]

Answer:

T° freezing solution → -11.3°C

T° boiling solution → 103.1 °C

Explanation:

Assuming 100 % dissociation, we must find the i, Van't Hoff factor which means "the ions that are dissolved in solution"

This salt dissociates as this:

SnCl₄ (aq)  →   1Sn⁴⁺ (aq)  +   4Cl⁻  (aq)   (so i =5)

The formula for the colligative property of freezing point depression and boiling point elevation are:

ΔT = Kf . m . i

where ΔT = T° freezing pure solvent - T° freezing solution

ΔT = Kb . m . i

where ΔT = T° boiling solution - T° boiling pure solvent

Freezing point depression:

0° - T° freezing solution = 1.86°C/m . 1.22 m . 5

T° freezing solution = - (1.86°C/m . 1.22 m . 5) → -11.3°C

Boiling point elevation:

T° boiling solution - 100°C = 0.512 °C/m . 1.22 m . 5

T° boiling solution = (0.512 °C/m . 1.22 m . 5) + 100°C → 103.1 °C

8 0
3 years ago
What are some of the unique properties of water?
Zepler [3.9K]

Answer:

Water molecules are polar, so they form hydrogen bonds. This gives water unique properties, such as a relatively high boiling point, high specific heat, cohesion, adhesion and density

Explanation:

4 0
2 years ago
Read 2 more answers
Other questions:
  • Complete the chemical change. _______ + e - → Cl-
    10·2 answers
  • Element Q is a theoretical nonmetal with atomic number 59. Consider the isotope: Q-95. How many electrons are in an atom of Q-95
    7·1 answer
  • Mass is measured using _____.
    5·2 answers
  • How can atoms be neutral if they contain charged particles?
    6·1 answer
  • At 40 degrees Celsius , 100 grams of NaClO3 is added to 100 grams of water. The solution would be ..
    6·1 answer
  • A hot metal plate at 150°C has been placed in air at room temperature. Which event would most likely take place over the next fe
    12·1 answer
  • HELP WHOEVER ANSWERS WILL BE MARKED BRAINLIEST
    8·1 answer
  • What kind of weather is associated with high air pressure?
    15·2 answers
  • The reaction between calcium carbonate (CaCO3) and HCl produces calcium chloride (CaCl2), carbon dioxide (CO2), and water (H2O).
    6·1 answer
  • To show the bonding in a molecule or polyatomic ion, we can use a lewis structure, which shows bonding electron pairs as ______
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!