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
valentina_108 [34]
2 years ago
12

How many o2 molecules are present in 0.470 of oxygen gas

Chemistry
1 answer:
kolbaska11 [484]2 years ago
7 0

Answer:

<em>The number of molecules in 16 grams of oxygen gas is 3.01*10^23, equal to half of Avogadro's number</em>

Explanation:

You might be interested in
A certain liquid X has a normal boiling point of 118.4 °C and a boiling point elevation constant K=2.40 °С kg-mol-1. A solution
gizmo_the_mogwai [7]

Answer:

43.47 g

Explanation:

The <em>boiling point elevation</em> is described as:

  • ΔT = K * m

Where ΔT is the difference in boiling points: 120.6-118.4 = 2.2 °C

K is the boiling point elevation constant, K= 2.40 °C·kg·mol⁻¹

and m is the molality of the solution (molality = mol solute/kg solvent).

So first we <u>calculate the molality of the solution</u>:

  • ΔT = K * m
  • 2.2 °C = 2.40 °C·kg·mol⁻¹ * m
  • m=0.917 m

Now we calculate the moles of benzamide (C₇H₇NO, MW=315g/mol), using the given mass of the liquid X.

  • 150 g ⇒ 150/1000 = 0.150 kg
  • 0.917 m = molC₇H₇NO / 0.150kg
  • molC₇H₇NO = 0.138 mol

Finally we convert moles of C₇H₇NO into grams, using its molecular weight:

  • 0.138 molC₇H₇NO * 315g/mol = 43.47 g
4 0
3 years ago
I really need help with this, someone help me please.
Pepsi [2]
Its C. It has to be equivalent to the number divided or multiplied by 5.
6 0
3 years ago
A 1.2 L weather balloon on the ground has a temperature of 25°C and is at atmospheric pressure (1.0 atm). When it rises to an el
icang [17]

Answer:

The temperature of the air at this given elevation will be 53.32425°C

Explanation:

We can calculate the final temperature through the combined gas law. Therefore we will need to know 1 ) The initial volume, 2 ) The initial temperature, 3 ) Initial Pressure, 4 ) Final Volume, 5 ) Final Pressure.

Initial Volume = 1.2 L ; Initial Temperature = 25°C = 298.15 K ; Initial pressure = 1.0 atm  ; Final Volume = 1.8 L ; Final pressure = 0.73 atm  

We have all the information we need. Now let us substitute into the following formula, and solve for the final temperature ( T_2 ),

P_1V_1 / T_1 = P_2V_2 / T_2,

T_2 = P_2V_2T_1 / P_1V_1,

T_2 = 0.73 atm * 1.8 L * 298.15 K / 1 atm * 1.2 L = ( 0.73 * 1.8 * 298.15 / 1 * 1.2 ) K = 326.47425 K,

T_2 = 326.47425 K = 53.32425 C

7 0
3 years ago
What Is a decrease in velocity called
Andrews [41]
The decrease in velocity is called deceleration or negative acceleration.


Hope i helped... If you need anything else ask me! :)

5 0
3 years ago
What do you think about our current forms of recycling? Why?
tankabanditka [31]
It is absurd. Environmentalists prefer that you don’t recycle at all because most if not all of our recyclables are being recycled incorrectly.
8 0
3 years ago
Other questions:
  • The tilt of the Earth on its axis causes
    9·2 answers
  • Is neon magnetic ? Also what id its freezing point?
    6·2 answers
  • The wavelength of the red-pink line emitted by a laboratory sample of excited hydrogen is 656 nm. Taking a spectrum of a glowing
    10·1 answer
  • What is air pollution?
    10·2 answers
  • A cell needs ribosomes to
    15·1 answer
  • At STP, what is the volume occupied by 6.7 mol H2?​
    15·1 answer
  • Which statement about atoms is correct
    13·1 answer
  • Which of the following could be considered a benefit of modern farming
    9·2 answers
  • Compare a low-dose rate internal radiation treatment to a high dose rate internal treatment. What do you think are the positives
    6·1 answer
  • Consider the following reaction:
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!